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Daily Archives: 2023年11月9日

C#与java通过RSA互相加解密，支持分段加解密，支持长文本，支持公钥加密私钥解密，私钥加密公钥解密

1、C#代码 C#采用的RSACryptoServiceProvider类进行的加解密，由于该类默认是不支持私钥加密公钥解密的，需要通过BouncyCastle.Crypto.dll转换一下才可以。 代码如下：

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using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
using System.IO;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Security;
using System.Xml;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Pkcs;
using Org.BouncyCastle.X509;
using Org.BouncyCastle.Asn1.X509;
namespace RSADemo
{
    /// <summary>
    /// RSA加解密帮助类
    /// 作者：代浩然
    /// 时间：2019-1-21 18:37
    /// </summary>
    public class RSAHelper
    {
        /// <summary>
        /// 生成公钥和私钥对
        /// </summary>
        public static void GeneratePublicAndPrivateKeyInfo()
        {
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            using (StreamWriter writer = new StreamWriter("PrivateKey.xml"))  //这个文件要保密...
            {
                string privateKey = rsa.ToXmlString(true);
                writer.WriteLine(privateKey);
            }
            using (StreamWriter writer = new StreamWriter("PublicKey.xml"))
            {
                string publicKey = rsa.ToXmlString(false);
                writer.WriteLine(publicKey);
            }
        }
        /// <summary>
        /// 用私钥给数据进行RSA加密
        /// </summary>
        /// <param name="xmlPrivateKey"> 私钥(XML格式字符串)</param>
        /// <param name="strEncryptString">要加密的数据</param>
        /// <returns> 加密后的数据 </returns>
        public static string PrivateKeyEncrypt(string xmlPrivateKey, string strEncryptString)
        {
            //加载私钥
            RSACryptoServiceProvider privateRsa = new RSACryptoServiceProvider();
            privateRsa.FromXmlString(ReadFile(xmlPrivateKey));
            //转换密钥
            AsymmetricCipherKeyPair keyPair = DotNetUtilities.GetKeyPair(privateRsa);
            IBufferedCipher c = CipherUtilities.GetCipher("RSA/ECB/PKCS1Padding"); //使用RSA/ECB/PKCS1Padding格式
            //第一个参数为true表示加密，为false表示解密；第二个参数表示密钥
            c.Init(true, keyPair.Private);
            byte[] dataToEncrypt = Encoding.UTF8.GetBytes(strEncryptString);
            #region 分段加密
            int bufferSize = (privateRsa.KeySize / 8) - 11;
            byte[] buffer = new byte[bufferSize];
            byte[] outBytes = null;
            //分段加密
            using (MemoryStream input = new MemoryStream(dataToEncrypt))
            using (MemoryStream ouput = new MemoryStream())
            {
                while (true)
                {
                    int readLine = input.Read(buffer, 0, bufferSize);
                    if (readLine <= 0)
                    {
                        break;
                    }
                    byte[] temp = new byte[readLine];
                    Array.Copy(buffer, 0, temp, 0, readLine);
                    byte[] encrypt = c.DoFinal(temp);
                    ouput.Write(encrypt, 0, encrypt.Length);
                }
                outBytes = ouput.ToArray();
            }
            #endregion
            //byte[] outBytes = c.DoFinal(DataToEncrypt);//加密
            string strBase64 = Convert.ToBase64String(outBytes);
            return strBase64;
        }
        /// <summary>
        /// 用公钥给数据进行RSA解密
        /// </summary>
        /// <param name="xmlPublicKey"> 公钥(XML格式字符串) </param>
        /// <param name="strDecryptString"> 要解密数据 </param>
        /// <returns> 解密后的数据 </returns>
        public static string PublicKeyDecrypt(string xmlPublicKey, string strDecryptString)
        {
            //加载公钥
            RSACryptoServiceProvider publicRsa = new RSACryptoServiceProvider();
            publicRsa.FromXmlString(ReadFile(xmlPublicKey));
            RSAParameters rp = publicRsa.ExportParameters(false);
            //转换密钥
            AsymmetricKeyParameter pbk = DotNetUtilities.GetRsaPublicKey(rp);
            IBufferedCipher c = CipherUtilities.GetCipher("RSA/ECB/PKCS1Padding");
            //第一个参数为true表示加密，为false表示解密；第二个参数表示密钥
            c.Init(false, pbk);
            byte[] outBytes = null;
            byte[] dataToDecrypt = Convert.FromBase64String(strDecryptString);
            #region 分段解密
            int keySize = publicRsa.KeySize / 8;
            byte[] buffer = new byte[keySize];
            using (MemoryStream input = new MemoryStream(dataToDecrypt))
            using (MemoryStream output = new MemoryStream())
            {
                while (true)
                {
                    int readLine = input.Read(buffer, 0, keySize);
                    if (readLine <= 0)
                    {
                        break;
                    }
                    byte[] temp = new byte[readLine];
                    Array.Copy(buffer, 0, temp, 0, readLine);
                    byte[] decrypt = c.DoFinal(temp);
                    output.Write(decrypt, 0, decrypt.Length);
                }
                outBytes = output.ToArray();
            }
            #endregion
            //byte[] outBytes = c.DoFinal(DataToDecrypt);//解密
            string strDec = Encoding.UTF8.GetString(outBytes);
            return strDec;
        }
        /// <summary>
        /// 使用公钥加密，分段加密
        /// </summary>
        /// <param name="content"></param>
        /// <param name="privateKeyPath"></param>
        /// <returns></returns>
        public static string EncrytByPublic(string publicKeyPath, string strEncryptString)
        {
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            rsa.FromXmlString(ReadFile(publicKeyPath));
            byte[] originalData = Encoding.UTF8.GetBytes(strEncryptString);
            if (originalData == null || originalData.Length <= 0)
            {
                throw new NotSupportedException();
            }
            if (rsa == null)
            {
                throw new ArgumentNullException();
            }
            byte[] encryContent = null;
            #region 分段加密
            int bufferSize = (rsa.KeySize / 8) - 11;
            byte[] buffer = new byte[bufferSize];
            //分段加密
            using (MemoryStream input = new MemoryStream(originalData))
            using (MemoryStream ouput = new MemoryStream())
            {
                while (true)
                {
                    int readLine = input.Read(buffer, 0, bufferSize);
                    if (readLine <= 0)
                    {
                        break;
                    }
                    byte[] temp = new byte[readLine];
                    Array.Copy(buffer, 0, temp, 0, readLine);
                    byte[] encrypt = rsa.Encrypt(temp, false);
                    ouput.Write(encrypt, 0, encrypt.Length);
                }
                encryContent = ouput.ToArray();
            }
            #endregion
            return Convert.ToBase64String(encryContent);
        }
        /// <summary>
        /// 通过私钥解密，分段解密
        /// </summary>
        /// <param name="content"></param>
        /// <param name="privateKeyPath"></param>
        /// <returns></returns>
        public static string DecryptByPrivate(string privateKeyPath, string strDecryptString)
        {
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            rsa.FromXmlString(ReadFile(privateKeyPath));
            byte[] encryptData = Convert.FromBase64String(strDecryptString);
            //byte[] dencryContent = rsa.Decrypt(encryptData, false);
            byte[] dencryContent = null;
            #region 分段解密
            if (encryptData == null || encryptData.Length <= 0)
            {
                throw new NotSupportedException();
            }
            int keySize = rsa.KeySize / 8;
            byte[] buffer = new byte[keySize];
            using (MemoryStream input = new MemoryStream(encryptData))
            using (MemoryStream output = new MemoryStream())
            {
                while (true)
                {
                    int readLine = input.Read(buffer, 0, keySize);
                    if (readLine <= 0)
                    {
                        break;
                    }
                    byte[] temp = new byte[readLine];
                    Array.Copy(buffer, 0, temp, 0, readLine);
                    byte[] decrypt = rsa.Decrypt(temp, false);
                    output.Write(decrypt, 0, decrypt.Length);
                }
                dencryContent = output.ToArray();
            }
            #endregion
            return Encoding.UTF8.GetString(dencryContent);
        }
        /// <summary>
        /// 读取文件
        /// </summary>
        /// <param name="filePath"></param>
        /// <returns></returns>
        public static string ReadFile(string filePath)
        {
            string content = "";
            if (File.Exists(filePath))
            {
                content = File.ReadAllText(filePath);
                byte[] mybyte = Encoding.UTF8.GetBytes(content);
                content = Encoding.UTF8.GetString(mybyte);
            }
            return content;
        }
        /// <summary>
        /// 将私钥转换成java所用的私钥字符串
        /// </summary>
        /// <param name="privateKeyPath">私钥文件路径</param>
        /// <returns></returns>
        public static string RSAPrivateKeyDotNet2Java(string privateKeyPath)
        {
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(ReadFile(privateKeyPath));
            BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText));
            BigInteger exp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText));
            BigInteger d = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("D")[0].InnerText));
            BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("P")[0].InnerText));
            BigInteger q = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Q")[0].InnerText));
            BigInteger dp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DP")[0].InnerText));
            BigInteger dq = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DQ")[0].InnerText));
            BigInteger qinv = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("InverseQ")[0].InnerText));
            RsaPrivateCrtKeyParameters privateKeyParam = new RsaPrivateCrtKeyParameters(m, exp, d, p, q, dp, dq, qinv);
            PrivateKeyInfo privateKeyInfo = PrivateKeyInfoFactory.CreatePrivateKeyInfo(privateKeyParam);
            byte[] serializedPrivateBytes = privateKeyInfo.ToAsn1Object().GetEncoded();
            return Convert.ToBase64String(serializedPrivateBytes);    
        }
        /// <summary>
        /// 将公钥转换成java所用的公钥字符串
        /// </summary>
        /// <param name="publicKeyPath">公钥路径</param>
        /// <returns></returns>
        public static string RSAPublicKeyDotNet2Java(string publicKeyPath)
        {
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(ReadFile(publicKeyPath));
            BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText));
            BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText));
            RsaKeyParameters pub = new RsaKeyParameters(false, m, p);
            SubjectPublicKeyInfo publicKeyInfo = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(pub);
            byte[] serializedPublicBytes = publicKeyInfo.ToAsn1Object().GetDerEncoded();
            return Convert.ToBase64String(serializedPublicBytes);
        }
    }
}

2、java端代码

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import java.io.*;
import java.util.Base64;
public class Base64Utils {
    /** *//**
     * 文件读取缓冲区大小
     */
    private static final int CACHE_SIZE = 1024;
    /** *//**
     * <p>
     * BASE64字符串解码为二进制数据
     * </p>
     *
     * @param base64
     * @return
     * @throws Exception
     */
    public static byte[] decode(String base64) throws Exception {
        //return Base64.decode(base64.getBytes());
        //Base64.getEncoder().encodeToString("在Java 8中,Base64编码已经成为Java类库的标准。".getBytes("utf-8"));
        return Base64.getDecoder().decode(base64);
    }
    /** *//**
     * <p>
     * 二进制数据编码为BASE64字符串
     * </p>
     *
     * @param bytes
     * @return
     * @throws Exception
     */
    public static String encode(byte[] bytes) throws Exception {
        //return new String(Base64.encode(bytes));
        return Base64.getEncoder().encodeToString(bytes);
    }
    /** *//**
     * <p>
     * 将文件编码为BASE64字符串
     * </p>
     * <p>
     * 大文件慎用，可能会导致内存溢出
     * </p>
     *
     * @param filePath 文件绝对路径
     * @return
     * @throws Exception
     */
    public static String encodeFile(String filePath) throws Exception {
        byte[] bytes = fileToByte(filePath);
        return encode(bytes);
    }
    /** *//**
     * <p>
     * BASE64字符串转回文件
     * </p>
     *
     * @param filePath 文件绝对路径
     * @param base64 编码字符串
     * @throws Exception
     */
    public static void decodeToFile(String filePath, String base64) throws Exception {
        byte[] bytes = decode(base64);
        byteArrayToFile(bytes, filePath);
    }
    /** *//**
     * <p>
     * 文件转换为二进制数组
     * </p>
     *
     * @param filePath 文件路径
     * @return
     * @throws Exception
     */
    public static byte[] fileToByte(String filePath) throws Exception {
        byte[] data = new byte[0];
        File file = new File(filePath);
        if (file.exists()) {
            FileInputStream in = null;
            ByteArrayOutputStream out = null;
            try{
                in = new FileInputStream(file);
                out = new ByteArrayOutputStream(2048);
                byte[] cache = new byte[CACHE_SIZE];
                int nRead = 0;
                while ((nRead = in.read(cache)) != -1) {
                    out.write(cache, 0, nRead);
                    out.flush();
                }
                data = out.toByteArray();
            }catch (Exception e){
                e.printStackTrace();
            }finally {
                if (in != null){
                    in.close();
                }
                if (out != null){
                    out.close();
                }
            }
        }
        return data;
    }
    /** *//**
     * <p>
     * 二进制数据写文件
     * </p>
     *
     * @param bytes 二进制数据
     * @param filePath 文件生成目录
     */
    public static void byteArrayToFile(byte[] bytes, String filePath) throws Exception {
        InputStream in = null;
        OutputStream out = null;
        try{
            in = new ByteArrayInputStream(bytes);
            File destFile = new File(filePath);
            if (!destFile.getParentFile().exists()) {
                destFile.getParentFile().mkdirs();
            }
            destFile.createNewFile();
            out = new FileOutputStream(destFile);
            byte[] cache = new byte[CACHE_SIZE];
            int nRead = 0;
            while ((nRead = in.read(cache)) != -1) {
                out.write(cache, 0, nRead);
                out.flush();
            }
            out.close();
            in.close();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if (in != null){
                in.close();
            }
            if (out != null){
                out.close();
            }
        }
    }
}

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import javax.crypto.Cipher;
import java.io.ByteArrayOutputStream;
import java.math.BigInteger;
import java.security.*;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.*;
import java.util.Base64;
import java.util.HashMap;
import java.util.Map;
/**
* 非对称加密解密
*/
public class RSAEncryptProvider {
    /**
     * 加密算法RSA
     */
    public static final String KEY_ALGORITHM = "RSA";
    /**
     * 签名算法
     */
    public static final String SIGNATURE_ALGORITHM = "MD5withRSA";
    /**
     * 获取公钥的key
     */
    private static final String PUBLIC_KEY = "RSAPublicKey";
    /**
     * 获取私钥的key
     */
    private static final String PRIVATE_KEY = "RSAPrivateKey";
    /**
     * RSA最大加密明文大小
     */
    private static final int MAX_ENCRYPT_BLOCK = 117;
    /**
     * RSA最大解密密文大小
     */
    private static final int MAX_DECRYPT_BLOCK = 128;
    /**
     * <p>
     * 生成密钥对(公钥和私钥)
     * </p>
     *
     * @return
     * @throws Exception
     */
    public static Map<String, Object> genKeyPair() throws Exception {
        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
        keyPairGen.initialize(1024);
        KeyPair keyPair = keyPairGen.generateKeyPair();
        RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
        RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
        Map<String, Object> keyMap = new HashMap<String, Object>(2);
        keyMap.put(PUBLIC_KEY, publicKey);
        keyMap.put(PRIVATE_KEY, privateKey);
        return keyMap;
    }
    /**
     * <p>
     * 用私钥对信息生成数字签名
     * </p>
     *
     * @param msg 已加密数据
     * @param privateKey 私钥(BASE64编码)
     *
     * @return
     * @throws Exception
     */
    public static String sign(String msg, String privateKey) throws Exception {
        byte[] data = msg.getBytes();
        byte[] keyBytes = Base64.getDecoder().decode(privateKey);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        PrivateKey privateK = keyFactory.generatePrivate(pkcs8KeySpec);
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
        signature.initSign(privateK);
        signature.update(data);
        return Base64.getEncoder().encodeToString(signature.sign());
    }
    /**
     * <p>
     * 校验数字签名
     * </p>
     *
     * @param msg 已加密数据
     * @param publicKey 公钥(BASE64编码)
     * @param sign 数字签名
     *
     * @return
     * @throws Exception
     *
     */
    public static boolean verify(String msg, String publicKey, String sign)
            throws Exception {
        byte[] data = msg.getBytes();
        byte[] keyBytes = Base64.getDecoder().decode(publicKey);
        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        PublicKey publicK = keyFactory.generatePublic(keySpec);
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
        signature.initVerify(publicK);
        signature.update(data);
        return signature.verify(Base64.getDecoder().decode(sign));
    }
    /**
     * <P>
     * 私钥解密，进行分片解密，解密大文本
     * </p>
     *
     * @param encryptedDataStr 已加密数据
     * @param privateKey 私钥(BASE64编码)
     * @return
     * @throws Exception
     */
    public static byte[] decryptByPrivateKey(byte[] encryptedDataStr, String privateKey)
            throws Exception {
        //byte[] encryptedData = Base64.getDecoder().decode(encryptedDataStr);
        byte[] encryptedData = encryptedDataStr;
        byte[] keyBytes = Base64.getDecoder().decode(privateKey);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.DECRYPT_MODE, privateK);
        int inputLen = encryptedData.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 对数据分段解密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
                cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
            } else {
                cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_DECRYPT_BLOCK;
        }
        byte[] decryptedData = out.toByteArray();
        out.close();
        //return new String(decryptedData);
        return decryptedData;
    }
    /**
     * <p>
     * 公钥解密，进行分片解密，解密大文本
     * </p>
     *
     * @param encryptedDataStr 已加密数据
     * @param publicKey 公钥(BASE64编码)
     * @return
     * @throws Exception
     */
    public static byte[] decryptByPublicKey(byte[] encryptedDataStr, String publicKey)
            throws Exception {
        //byte[] encryptedData = Base64.getDecoder().decode(encryptedDataStr);
        byte[] encryptedData = encryptedDataStr;
        byte[] keyBytes = Base64.getDecoder().decode(publicKey);
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key publicK = keyFactory.generatePublic(x509KeySpec);
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.DECRYPT_MODE, publicK);
        int inputLen = encryptedData.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 对数据分段解密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
                cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
            } else {
                cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_DECRYPT_BLOCK;
        }
        byte[] decryptedData = out.toByteArray();
        out.close();
        //return new String(decryptedData);
        return decryptedData;
    }
    /**
     * <p>
     * 公钥加密，进行分片加密，加密大文本
     * </p>
     *
     * @param data 源数据
     * @param publicKey 公钥(BASE64编码)
     * @return
     * @throws Exception
     */
    public static byte[] encryptByPublicKey(byte[] data, String publicKey)
            throws Exception {
        byte[] keyBytes = Base64.getDecoder().decode(publicKey);
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key publicK = keyFactory.generatePublic(x509KeySpec);
        // 对数据加密
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, publicK);
        int inputLen = data.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 对数据分段加密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
                cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
            } else {
                cache = cipher.doFinal(data, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_ENCRYPT_BLOCK;
        }
        byte[] encryptedData = out.toByteArray();
        out.close();
        //String encryptedDataStr = Base64.getEncoder().encodeToString(encryptedData);
        return encryptedData;
    }
    /**
     * <p>
     * 私钥加密，进行分片加密，加密大文本
     * </p>
     *
     * @param data 源数据
     * @param privateKey 私钥(BASE64编码)
     * @return
     * @throws Exception
     */
    public static byte[] encryptByPrivateKey(byte[] data, String privateKey)
            throws Exception {
        byte[] keyBytes = Base64.getDecoder().decode(privateKey);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, privateK);
        int inputLen = data.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 对数据分段加密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
                cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
            } else {
                cache = cipher.doFinal(data, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_ENCRYPT_BLOCK;
        }
        byte[] encryptedData = out.toByteArray();
        out.close();
        //String encryptedDataStr = Base64.getEncoder().encodeToString(encryptedData);
        return encryptedData;
    }
    /**
     * <p>
     * 获取私钥
     * </p>
     *
     * @param keyMap 密钥对
     * @return
     * @throws Exception
     */
    public static String getPrivateKey(Map<String, Object> keyMap)
            throws Exception {
        Key key = (Key) keyMap.get(PRIVATE_KEY);
        return Base64.getEncoder().encodeToString(key.getEncoded());
    }
    /**
     * <p>
     * 获取公钥
     * </p>
     *
     * @param keyMap 密钥对
     * @return
     * @throws Exception
     */
    public static String getPublicKey(Map<String, Object> keyMap)
            throws Exception {
        Key key = (Key) keyMap.get(PUBLIC_KEY);
        return Base64.getEncoder().encodeToString(key.getEncoded());
    }
    /**
     * 通过C#的RSACryptoServiceProvider类产生的公钥进行转换成java的公钥
     * @param modulus
     * @param exponent
     * @return
     */
    public static PublicKey getPublicKey(String modulus, String exponent) {
        try {
            byte[] m = Base64Utils.decode(modulus);
            byte[] e = Base64Utils.decode(exponent);
            BigInteger b1 = new BigInteger(1,m);
            BigInteger b2 = new BigInteger(1,e);
            KeyFactory keyFactory = KeyFactory.getInstance("RSA");
            RSAPublicKeySpec keySpec = new RSAPublicKeySpec(b1, b2);
            return (RSAPublicKey) keyFactory.generatePublic(keySpec);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    /**
     * 通过C#的RSACryptoServiceProvider类产生的私钥进行转换成java的私钥
     * @param modulus
     * @param privateExponent
     * @return
     */
    public PrivateKey getPrivateKey(String modulus,String privateExponent) throws Exception {
        BigInteger m = new BigInteger(modulus);
        BigInteger e = new BigInteger(privateExponent);
        RSAPrivateKeySpec keySpec = new RSAPrivateKeySpec(m,e);
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        PrivateKey privateKey = keyFactory.generatePrivate(keySpec);
        return privateKey;
    }
    public static void main(String[] args) throws Exception {
        //通过C#公钥文件转换的java公钥字符串
        String publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCYyiJ5biYwnsRE2RgqI6rEsmxySuoxRAKBPkxZwBN2+NTb4KNr8JUtaD8Fj+NV1+eEspm8MT519PJRwCxOGxf/qU3CqCnTwxoc3MrN3MwxeQ1FC2wZkEm8y8FZKWd84udULxML+7ao1bCYWeDerd2MBWvKBpEqoG28jY3yY1AGbQIDAQAB";
        //通过C#私钥文件转换的java私钥字符串
        String privateKey = "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";
        //公钥加密
        String data = testPublicEncrypt("abc12345555555555554444444444" +
                "4444444444444444444444444444444444444" +
                "44444444444444444444444444444444444444" +
                "44444444444444444444444444444444444444" +
                "44444444444444444444444444444444444" +
                "444444444444444444444444444444444444" +
                "444444444444444444444444444444444444" +
                "555555555555555555555555555555555" +
                "5555555555555555555555555555555",publicKey);
        System.out.println(data);
        //私钥解密
        data = testPrivateDencrypt(data,privateKey);
        System.out.println(data);
        //私钥加密
        data = testPrivateEncrypt("abc12345555555555554444444444" +
                "4444444444444444444444444444444444444" +
                "44444444444444444444444444444444444444" +
                "44444444444444444444444444444444444444" +
                "44444444444444444444444444444444444" +
                "444444444444444444444444444444444444" +
                "444444444444444444444444444444444444" +
                "555555555555555555555555555555555" +
                "5555555555555555555555555555555",privateKey);
        System.out.println(data);
        //公钥解密
        data = testPublicDecrypt(data,publicKey);
        System.out.println(data);
    }
    /**
     * 测试公钥加密
     * @param content 要加密的字符串
     * @return
     * @throws Exception
     */
    private static String testPublicEncrypt(String content,String publicKey)throws Exception{
        byte[] entryData = RSAEncryptProvider.encryptByPublicKey(content.getBytes("UTF-8"), publicKey);
        return Base64Utils.encode(entryData);
    }
    /**
     * 测试私钥解密
     * @param content
     * @return
     * @throws Exception
     */
    private static String testPrivateDencrypt(String content,String privateKey)throws Exception{
        byte[] dentryData = RSAEncryptProvider.decryptByPrivateKey(Base64Utils.decode(content),privateKey);
        return new String(dentryData,"UTF-8");
    }
    /**
     * 测试通过私钥加密
     * @param content
     * @param privateKey
     * @return
     * @throws Exception
     */
    private static String testPrivateEncrypt(String content,String privateKey)throws Exception{
        byte[] entryData = RSAEncryptProvider.encryptByPrivateKey(content.getBytes("UTF-8"), privateKey);
        return Base64Utils.encode(entryData);
    }
    /**
     * 测试通过公钥解密
     * @param content
     * @param publicKey
     * @return
     * @throws Exception
     */
    private static String testPublicDecrypt(String content,String publicKey)throws Exception{
        byte[] dentryData = RSAEncryptProvider.decryptByPublicKey(Base64Utils.decode(content),publicKey);
        return new String(dentryData,"UTF-8");
    }
}

代码下载地址：https://download.csdn.net/download/lengyue2015/10930794   from:https://blog.csdn.net/lengyue2015/article/details/86582177

龙生   09 Nov 2023
View Details

前端调用浏览器打印判断用户点击确认还是取消

window监听到打印的beforePrint和afterPrint两个事件，但是无论点击打印还是取消都会触发afterPrint事件，所以只能通过这个事件的触发让用户自己判断是否打印成功，以此来记录数据是否打印或者是打印了几次，以下是打印的方法

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// import Vue from "vue";
import { productionPlanPrint } from '@/api/prodPlan'
const isDOM = (obj) => {
  return typeof HTMLElement === 'object'
    ? obj instanceof HTMLElement
    : obj &&
        typeof obj === 'object' &&
        obj.nodeType === 1 &&
        typeof obj.nodeName === 'string'
}
/* const extend = (obj, obj2) => {
  for (const k in obj2) {
    if (obj2.hasOwnProperty(k)) obj[k] = obj2[k]
  }
  return obj
} */
const isInBody = (node) => {
  return node === document.body ? false : document.body.contains(node)
}
const wrapperRefDom = (refDom) => {
  let prevDom = null
  let currDom = refDom
  if (!isInBody(currDom)) return currDom
  while (currDom) {
    if (prevDom) {
      const element = currDom.cloneNode(false)
      element.appendChild(prevDom)
      prevDom = element
    } else {
      prevDom = currDom.cloneNode(true)
    }
    currDom = currDom.parentElement
  }
  return prevDom
}
const getStyle = (options) => {
  let str = ''
  const styles = document.querySelectorAll('style,link')
  for (let i = 0; i < styles.length; i++) {
    str += styles[i].outerHTML
  }
  str +=
    '<style>' +
    (options.noPrint ? options.noPrint : '.no-print') +
    '{display:none;}</style>'
  return str
}
const getHtml = (dom, options) => {
  const inputs = document.querySelectorAll('input')
  const textAreas = document.querySelectorAll('textarea')
  const selects = document.querySelectorAll('select')
  for (let k = 0; k < inputs.length; k++) {
    if (inputs[k].type === 'checkbox' || inputs[k].type === 'radio') {
      if (inputs[k].checked === true) {
        inputs[k].setAttribute('checked', 'checked')
      } else {
        inputs[k].removeAttribute('checked')
      }
    } else if (inputs[k].type === 'text') {
      inputs[k].setAttribute('value', inputs[k].value)
    } else {
      inputs[k].setAttribute('value', inputs[k].value)
    }
  }
  for (let k2 = 0; k2 < textAreas.length; k2++) {
    if (textAreas[k2].type === 'textarea') {
      textAreas[k2].innerHTML = textAreas[k2].value
    }
  }
  for (let k3 = 0; k3 < selects.length; k3++) {
    if (selects[k3].type === 'select-one') {
      const child = selects[k3].children
      for (const i in child) {
        if (child[i].tagName === 'OPTION') {
          if (child[i].selected === true) {
            child[i].setAttribute('selected', 'selected')
          } else {
            child[i].removeAttribute('selected')
          }
        }
      }
    }
  }
  return options.noPrintParent ? dom.outerHTML : wrapperRefDom(dom).outerHTML
}
// var flag = false
const toPrint = (frameWindow, target, id) => {
  // var beforePrint = function() {
  //   // console.log('beforePrint');
  // }
  // var afterPrint = function() {
  //   flag = true
  //   // console.log('afterPrint')
  //   // target.$confirm('是否打印成功', '提示', {
  //   //   confirmButtonText: '成功',
  //   //   cancelButtonText: '失败',
  //   //   type: 'warning'
  //   // }).then(() => {
  //   //   flag = true
  //   //   // console.log('ddd',id)
  //   //   // productionPlanPrint({ id }).then(res =>{
  //   //   //   console.log('rrr', res)
  //   //   //   if (res.code==200){
  //   //   //     target.$message({
  //   //   //       type: 'success',
  //   //   //       message: '打印数据更新成功'
  //   //   //     })
  //   //   //   }
  //   //   // })
  //   // }).catch(() => {
  //   //   target.$message({
  //   //     type: 'info',
  //   //     message: '未成功打印'
  //   //   })
  //   // })
  //   // return flag
  // }
  //
  // if (frameWindow.matchMedia) { // 返回一个新的 MediaQueryList 对象，表示指定的媒体查询字符串解析后的结果。
  //   var mediaQueryList = frameWindow.matchMedia('print')
  //   mediaQueryList.addListener(function(mql) {
  //     // console.log('fff',mql)
  //     if (mql.matches) {
  //       beforePrint()
  //     } else {
  //       afterPrint()
  //     }
  //   })
  // }
  //
  // window.onbeforeprint = beforePrint;
  // window.onafterprint = afterPrint;
  try {
    setTimeout(function() {
      frameWindow.focus()
      try {
        // var mediaQueryList = frameWindow.matchMedia('print')
        // mediaQueryList.addListener((mql)=> {
        //   console.log('aaa',mql.matches)
        //   // if (mql.matches) {
        //   //   beforePrint();
        //   // } else {
        //   //   afterPrint();
        //   // }
        // })
        // console.log('打印',!frameWindow.document.execCommand('print', false, null))
        if (!frameWindow.document.execCommand('print', false, null)) {
          frameWindow.print()
          // console.log('打印1')
        }
      } catch (e) {
        frameWindow.print()
        // console.log('打印2')
      }
      frameWindow.close()
    }, 10)
  } catch (err) {
    console.log('err', err)
  }
}
const writeIframe = (content, target, id) => {
  const iframe = document.createElement('iframe')
  const f = document.body.appendChild(iframe)
  iframe.id = 'myIframe'
  iframe.setAttribute(
    'style',
    'position:absolute;width:0;height:0;top:-10px;left:-10px;'
  )
  const w = f.contentWindow || f.contentDocument
  const doc = f.contentDocument || f.contentWindow.document
  doc.open()
  doc.write(content)
  doc.close()
  iframe.onload = function() {
    // w.onafterprint = e=>{
    //   console.log('打印后',e)
    // }
    toPrint(w, target, id)
    setTimeout(function() {
      document.body.removeChild(iframe)
      // console.log('iii')
    }, 100)
  }
  return w
}
const Print = (dom, options, target, id) => {
  // console.log('ddd',target)
  options = { ...options, noPrint: '.no-print' }
  let targetDom
  if (typeof dom === 'string') {
    targetDom = document.querySelector(dom)
  } else {
    targetDom = isDOM(dom) ? dom : dom.$el
  }
  const content = getStyle(options) + getHtml(targetDom, options)
  const w = writeIframe(content, target, id)
  // console.log('ddd',flag)
  return w
}
export default Print

  调用方法后监听iframe的afterPrint事件

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// 打印BOM清单
    printTable(val) {
      let _this = this
      // console.log('打印',this.printTableData)
      // console.log('dd',this.printTableTitle.id)
      this.isShow = true
      setTimeout(async() => {
        const frameWindow = await VabPrint(this.$refs[val], { noPrintParent: true }, this,this.printTableTitle.id)
        // console.log('dddd',result)
        // 打印前
        var beforePrint = function() {
          // console.log('beforePrint');
        }
        // 打印后
        var afterPrint = function() {
          // console.log('afterPrint')
          _this.$confirm('是否打印成功', '提示', {
            confirmButtonText: '成功',
            cancelButtonText: '失败',
            type: 'warning'
          }).then(() => {
            // console.log('ddd',id)
            productionPlanPrint({ id: _this.printTableTitle.id }).then(res => {
              // console.log('rrr', res)
              if (res.code==200){
                _this.$message({
                  type: 'success',
                  message: '打印数据更新成功'
                })
                _this.drawer = false
                _this.handleQuery(_this.pageNum)
              }
            })
          }).catch(() => {
            _this.$message({
              type: 'info',
              message: '未成功打印'
            })
          })
        }
        if (frameWindow.matchMedia) { // 返回一个新的 MediaQueryList 对象，表示指定的媒体查询字符串解析后的结果。
          var mediaQueryList = frameWindow.matchMedia('print')
          mediaQueryList.addListener(function(mql) {
            // console.log('fff',mql)
            if (mql.matches) {
              beforePrint()
            } else {
              afterPrint()
            }
          })
        }
        this.isShow = false
      }, 10)
    }

  from:https://blog.csdn.net/soclear_/article/details/127439860

龙生   09 Nov 2023
View Details

jquery 打印方法 jquery打印网页

今天利用闲余时间研究了一下Jquery Jqprint插件，使用该Jquery脚本可以轻而易举的实现打印网页指定区域内容的功能： 例子一：

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Jquery Jqprint打印控件演示</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script language="javascript" src="./js/jquery-1.6.2.js"></script>
<script language="javascript" src="./js/jquery.jqprint-0.3.js"></script>
<style type="text/css">
html,body{margin:auto 15%;padding:0;}
p{line-height: 18px;}
</style>
<script language="javascript">
function print(){
$("#printContainer").jqprint();
}
</script>
</head>
<body>
<div id="printContainer">
<center><p style="font-size: 21pt;font-weight: bold;">报任安书</p></center>
        <p>    太史公牛马走司马迁再拜言。少卿足下：曩者辱赐书，教以慎于接物，推贤进士为务。意气勤勤恳恳，若望仆不相师，而用流俗人之言。仆非敢如是也。请略陈固陋。阙然久不报，幸勿为过。</p>
        <p>    仆之先人，非有剖符丹书之功，文史星历，近乎卜祝之间，固主上所戏弄，倡优畜之，流俗之所轻也。假令仆伏法受诛，若九牛亡一毛，与蝼蚁何以异？而世又不与能死节者比，特以为智穷罪极，不能自免，卒就死耳。何也？素所自树立使然。人固有一死，或重于泰山，或轻于鸿毛，用之所趋异也。太上不辱先，其次不辱身，其次不辱理色，其次不辱辞令，其次诎体受辱，其次易服受辱，其次关木索、被棰楚受辱，其次剔毛发、婴金铁受辱，其次毁肌肤、断肢体受辱，最下腐刑极矣！传曰：“刑不上大夫。”此言士节不可不勉励也。猛虎处深山，百兽震恐，及在穽槛之中，摇尾而求食，积威约之渐也。故士有画地为牢，势不入；削木为吏，议不对，定计于鲜也。今交手足，受木索，暴肌肤，受榜棰，幽于圜墙之中。当此之时，见狱吏则头枪地，视徒隶则心惕息。何者？积威约之势也。及以至是，言不辱者，所谓强颜耳，曷足贵乎！且西伯，伯也，拘于羑里；李斯，相也，具于五刑；淮阴，王也，受械于陈；彭越、张敖，南向称孤，系狱具罪；绛侯诛诸吕，权倾五伯，囚于请室；魏其，大将也，衣赭衣、关三木；季布为朱家钳奴；灌夫受辱居室。此人皆身至王侯将相，声闻邻国，及罪至罔加，不能引决自裁，在尘埃之中，古今一体，安在其不辱也！此言之，勇怯，势也；强弱，形也。审矣，何足怪乎？且人不能早自裁绳墨之外，已稍陵迟，至于鞭棰之间，乃欲引节，斯不亦远乎！古人所以重施刑于大夫者，殆为此也。</p>
        <p>    夫人情莫不贪生恶死，念亲戚，顾妻子；至激于义理者不然，乃有所不得已也。今仆不幸，早失父母，无兄弟之亲，独身孤立，少卿视仆于妻子何如哉？且勇者不必死节，怯夫慕义，何处不勉焉！仆虽怯懦，欲苟活，亦颇识去就之分矣，何至自沉溺累绁之辱哉！且夫臧获婢妾，犹能引决，况若仆之不得已乎？所以隐忍苟活，幽于粪土之中而不辞者，恨私心有所不尽，鄙陋没世，而文采不表于后也。</p>
        <p>    古者富贵而名摩灭，不可胜记，唯倜傥非常之人称焉。盖西伯拘而演《周易》；仲尼厄而作《春秋》；屈原放逐，乃赋《离骚》；左丘失明，厥有《国语》；孙子膑脚，《兵法》修列；不韦迁蜀，世传《吕览》；韩非囚秦，《说难》、《孤愤》；《诗》三百篇，大底圣贤发愤之所为作也。此人皆意有所郁结，不得通其道，故述往事，思来者。乃如左丘无目，孙子断足，终不可用，退而论书策，以舒其愤，思垂空文以自见。</p>
        <p>    仆窃不逊，近自托于无能之辞，网罗天下放失旧闻，略考其行事，综其终始，稽其成败兴坏之纪。上计轩辕，下至于兹，为十表、本纪十二、书八章、世家三十、列传七十，凡百三十篇。亦欲以究天人之际，通古今之变，成一家之言。草创未就，会遭此祸，惜其不成，是以就极刑而无愠色。仆诚已著此书，藏之名山，传之其人，通邑大都。则仆偿前辱之责，虽万被戮，岂有悔哉！然此可为智者道，难为俗人言也。</p>
        <p>    且负下未易居，下流多谤议。仆以口语遇遭此祸，重为乡党所笑，以污辱先人，亦何面目复上父母之丘墓乎？虽累百世，垢弥甚耳！是以肠一日而九回，居则忽忽若有所亡，出则不知其所往。每念斯耻，汗未尝不发背沾衣也。身直为闺合之臣，宁得自引深藏于岩穴邪？故且从俗浮沉，与时俯仰，通其狂惑。今少卿乃教以推贤进士，无乃与仆私心剌谬乎？今虽欲自雕琢，曼辞以自饰，无益于俗，不信，适足取辱耳。要之死日，然后是非乃定。书不能悉意，略陈固陋。谨再拜。</p>
</div>
<center><input type="button" onclick="print()" value="打印文章"/></center>
</body>
</html>

  例子二：

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Jquery Jqprint打印控件演示</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script language="javascript" src="./js/jquery-1.6.2.js"></script>
<script language="javascript" src="./js/jquery.jqprint-0.3.js"></script>
<style type="text/css">
html,body{margin:auto 15%;padding:0;}
p{line-height: 18px;}
</style>
<script language="javascript">
function print(){
$("#printContainer").jqprint({
debug: false, //如果是true则可以显示iframe查看效果（iframe默认高和宽都很小，可以再源码中调大），默认是false
importCSS: true, //true表示引进原来的页面的css，默认是true。（如果是true，先会找$("link[media=print]")，若没有会去找$("link")中的css文件）
printContainer: true, //表示如果原来选择的对象必须被纳入打印（注意：设置为false可能会打破你的CSS规则）。
operaSupport: true//表示如果插件也必须支持歌opera浏览器，在这种情况下，它提供了建立一个临时的打印选项卡。默认是true
});
}
</script>
</head>
<body>
<div id="printContainer">
<center><p style="font-size: 21pt;font-weight: bold;">报任安书</p></center>
        <p>    太史公牛马走司马迁再拜言。少卿足下：曩者辱赐书，教以慎于接物，推贤进士为务。意气勤勤恳恳，若望仆不相师，而用流俗人之言。仆非敢如是也。请略陈固陋。阙然久不报，幸勿为过。</p>
        <p>    仆之先人，非有剖符丹书之功，文史星历，近乎卜祝之间，固主上所戏弄，倡优畜之，流俗之所轻也。假令仆伏法受诛，若九牛亡一毛，与蝼蚁何以异？而世又不与能死节者比，特以为智穷罪极，不能自免，卒就死耳。何也？素所自树立使然。人固有一死，或重于泰山，或轻于鸿毛，用之所趋异也。太上不辱先，其次不辱身，其次不辱理色，其次不辱辞令，其次诎体受辱，其次易服受辱，其次关木索、被棰楚受辱，其次剔毛发、婴金铁受辱，其次毁肌肤、断肢体受辱，最下腐刑极矣！传曰：“刑不上大夫。”此言士节不可不勉励也。猛虎处深山，百兽震恐，及在穽槛之中，摇尾而求食，积威约之渐也。故士有画地为牢，势不入；削木为吏，议不对，定计于鲜也。今交手足，受木索，暴肌肤，受榜棰，幽于圜墙之中。当此之时，见狱吏则头枪地，视徒隶则心惕息。何者？积威约之势也。及以至是，言不辱者，所谓强颜耳，曷足贵乎！且西伯，伯也，拘于羑里；李斯，相也，具于五刑；淮阴，王也，受械于陈；彭越、张敖，南向称孤，系狱具罪；绛侯诛诸吕，权倾五伯，囚于请室；魏其，大将也，衣赭衣、关三木；季布为朱家钳奴；灌夫受辱居室。此人皆身至王侯将相，声闻邻国，及罪至罔加，不能引决自裁，在尘埃之中，古今一体，安在其不辱也！此言之，勇怯，势也；强弱，形也。审矣，何足怪乎？且人不能早自裁绳墨之外，已稍陵迟，至于鞭棰之间，乃欲引节，斯不亦远乎！古人所以重施刑于大夫者，殆为此也。</p>
        <p>    夫人情莫不贪生恶死，念亲戚，顾妻子；至激于义理者不然，乃有所不得已也。今仆不幸，早失父母，无兄弟之亲，独身孤立，少卿视仆于妻子何如哉？且勇者不必死节，怯夫慕义，何处不勉焉！仆虽怯懦，欲苟活，亦颇识去就之分矣，何至自沉溺累绁之辱哉！且夫臧获婢妾，犹能引决，况若仆之不得已乎？所以隐忍苟活，幽于粪土之中而不辞者，恨私心有所不尽，鄙陋没世，而文采不表于后也。</p>
        <p>    古者富贵而名摩灭，不可胜记，唯倜傥非常之人称焉。盖西伯拘而演《周易》；仲尼厄而作《春秋》；屈原放逐，乃赋《离骚》；左丘失明，厥有《国语》；孙子膑脚，《兵法》修列；不韦迁蜀，世传《吕览》；韩非囚秦，《说难》、《孤愤》；《诗》三百篇，大底圣贤发愤之所为作也。此人皆意有所郁结，不得通其道，故述往事，思来者。乃如左丘无目，孙子断足，终不可用，退而论书策，以舒其愤，思垂空文以自见。</p>
        <p>    仆窃不逊，近自托于无能之辞，网罗天下放失旧闻，略考其行事，综其终始，稽其成败兴坏之纪。上计轩辕，下至于兹，为十表、本纪十二、书八章、世家三十、列传七十，凡百三十篇。亦欲以究天人之际，通古今之变，成一家之言。草创未就，会遭此祸，惜其不成，是以就极刑而无愠色。仆诚已著此书，藏之名山，传之其人，通邑大都。则仆偿前辱之责，虽万被戮，岂有悔哉！然此可为智者道，难为俗人言也。</p>
        <p>    且负下未易居，下流多谤议。仆以口语遇遭此祸，重为乡党所笑，以污辱先人，亦何面目复上父母之丘墓乎？虽累百世，垢弥甚耳！是以肠一日而九回，居则忽忽若有所亡，出则不知其所往。每念斯耻，汗未尝不发背沾衣也。身直为闺合之臣，宁得自引深藏于岩穴邪？故且从俗浮沉，与时俯仰，通其狂惑。今少卿乃教以推贤进士，无乃与仆私心剌谬乎？今虽欲自雕琢，曼辞以自饰，无益于俗，不信，适足取辱耳。要之死日，然后是非乃定。书不能悉意，略陈固陋。谨再拜。</p>
</div>
<center><input type="button" onclick="print()" value="打印文章"/></center>
</body>
</html>

  from:https://blog.51cto.com/u_16099297/6962748

龙生   09 Nov 2023
View Details

web端js调用window.print()的回调函数（打印前和打印后的回调）

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$(function () {
    //定义打印前事件
    var beforePrint = function () {
        console.log("打印前");
    };
    //定义打印后事件
    var afterPrint = function () {
        console.log("打印后");
        app.post('ba.service.CompanyService', 'updateCompany', {
            'companyId': companyId,
            "autoRegStateCode":"40"
        })
            .then(function (res) {
            });
    }
    //监听window状态
    if (window.matchMedia) {
        var mediaQueryList = window.matchMedia('print');
        //为印添加事件
        mediaQueryList.addListener(function (mql) {
            if (mql.matches) {
                beforePrint();
            } else {
                afterPrint();
            }
        });
    }
    //打印前事件
    window.onbeforeprint = beforePrint;
    //打印后事件
    window.onafterprint = afterPrint;
    //执行打印
    $(".print").click(function () {
        $(".print").hide()
        var newstr = document.getElementById("printPage").innerHTML;
        window.print();
        $(".print").show()
    })
});

  from:https://codeleading.com/article/96272527602/#google_vignette

龙生   09 Nov 2023
View Details

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