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
View Detailswindow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
View Details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$("link")中的css文件） printContainer: true, //表示如果原来选择的对象必须被纳入打印（注意：设置为false可能会打破你的CSS规则）。 operaSupport: true//表示如果插件也必须支持歌opera浏览器，在这种情况下，它提供了建立一个临时的打印选项卡。默认是true }); } </script> </head> <body> <div id="printContainer"> <center><p style="font-size: 21pt;font-weight: bold;">报任安书</p></center> <p> 太史公牛马走司马迁再拜言。少卿足下：曩者辱赐书，教以慎于接物，推贤进士为务。意气勤勤恳恳，若望仆不相师，而用流俗人之言。仆非敢如是也。请略陈固陋。阙然久不报，幸勿为过。</p> <p> 仆之先人，非有剖符丹书之功，文史星历，近乎卜祝之间，固主上所戏弄，倡优畜之，流俗之所轻也。假令仆伏法受诛，若九牛亡一毛，与蝼蚁何以异？而世又不与能死节者比，特以为智穷罪极，不能自免，卒就死耳。何也？素所自树立使然。人固有一死，或重于泰山，或轻于鸿毛，用之所趋异也。太上不辱先，其次不辱身，其次不辱理色，其次不辱辞令，其次诎体受辱，其次易服受辱，其次关木索、被棰楚受辱，其次剔毛发、婴金铁受辱，其次毁肌肤、断肢体受辱，最下腐刑极矣！传曰：“刑不上大夫。”此言士节不可不勉励也。猛虎处深山，百兽震恐，及在穽槛之中，摇尾而求食，积威约之渐也。故士有画地为牢，势不入；削木为吏，议不对，定计于鲜也。今交手足，受木索，暴肌肤，受榜棰，幽于圜墙之中。当此之时，见狱吏则头枪地，视徒隶则心惕息。何者？积威约之势也。及以至是，言不辱者，所谓强颜耳，曷足贵乎！且西伯，伯也，拘于羑里；李斯，相也，具于五刑；淮阴，王也，受械于陈；彭越、张敖，南向称孤，系狱具罪；绛侯诛诸吕，权倾五伯，囚于请室；魏其，大将也，衣赭衣、关三木；季布为朱家钳奴；灌夫受辱居室。此人皆身至王侯将相，声闻邻国，及罪至罔加，不能引决自裁，在尘埃之中，古今一体，安在其不辱也！此言之，勇怯，势也；强弱，形也。审矣，何足怪乎？且人不能早自裁绳墨之外，已稍陵迟，至于鞭棰之间，乃欲引节，斯不亦远乎！古人所以重施刑于大夫者，殆为此也。</p> <p> 夫人情莫不贪生恶死，念亲戚，顾妻子；至激于义理者不然，乃有所不得已也。今仆不幸，早失父母，无兄弟之亲，独身孤立，少卿视仆于妻子何如哉？且勇者不必死节，怯夫慕义，何处不勉焉！仆虽怯懦，欲苟活，亦颇识去就之分矣，何至自沉溺累绁之辱哉！且夫臧获婢妾，犹能引决，况若仆之不得已乎？所以隐忍苟活，幽于粪土之中而不辞者，恨私心有所不尽，鄙陋没世，而文采不表于后也。</p> <p> 古者富贵而名摩灭，不可胜记，唯倜傥非常之人称焉。盖西伯拘而演《周易》；仲尼厄而作《春秋》；屈原放逐，乃赋《离骚》；左丘失明，厥有《国语》；孙子膑脚，《兵法》修列；不韦迁蜀，世传《吕览》；韩非囚秦，《说难》、《孤愤》；《诗》三百篇，大底圣贤发愤之所为作也。此人皆意有所郁结，不得通其道，故述往事，思来者。乃如左丘无目，孙子断足，终不可用，退而论书策，以舒其愤，思垂空文以自见。</p> <p> 仆窃不逊，近自托于无能之辞，网罗天下放失旧闻，略考其行事，综其终始，稽其成败兴坏之纪。上计轩辕，下至于兹，为十表、本纪十二、书八章、世家三十、列传七十，凡百三十篇。亦欲以究天人之际，通古今之变，成一家之言。草创未就，会遭此祸，惜其不成，是以就极刑而无愠色。仆诚已著此书，藏之名山，传之其人，通邑大都。则仆偿前辱之责，虽万被戮，岂有悔哉！然此可为智者道，难为俗人言也。</p> <p> 且负下未易居，下流多谤议。仆以口语遇遭此祸，重为乡党所笑，以污辱先人，亦何面目复上父母之丘墓乎？虽累百世，垢弥甚耳！是以肠一日而九回，居则忽忽若有所亡，出则不知其所往。每念斯耻，汗未尝不发背沾衣也。身直为闺合之臣，宁得自引深藏于岩穴邪？故且从俗浮沉，与时俯仰，通其狂惑。今少卿乃教以推贤进士，无乃与仆私心剌谬乎？今虽欲自雕琢，曼辞以自饰，无益于俗，不信，适足取辱耳。要之死日，然后是非乃定。书不能悉意，略陈固陋。谨再拜。</p> </div> <center><input type="button" onclick="print()" value="打印文章"/></center> </body> </html> |
from:https://blog.51cto.com/u_16099297/6962748
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$(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
View Details使用jdk的反射机制，创建对象的能力， 创建的是代理类的对象。 而不用你创建类文件。不用写java文件。
动态：在程序执行时，调用jdk提供的方法才能创建代理类的对象。
jdk动态代理，必须有接口，目标类必须实现接口， 没有接口时，需要使用cglib动态代理
View DetailsCGLIB(Code Generation Library)是一个开源、高性能、高质量的Code生成类库（代码生成包）。
它可以在运行期扩展Java类与实现Java接口。Hibernate用它实现PO(Persistent Object 持久化对象)字节码的动态生成，Spring AOP用它提供方法的interception（拦截）。
CGLIB的底层是通过使用一个小而快的字节码处理框架ASM，来转换字节码并生成新的类。但不鼓励大家直接使用ASM框架，因为对底层技术要求比较高。
View DetailsAOP的实现方式有两种：
AOP框架在编译阶段，就对目标类进行修改，得到的class文件已经是被修改过的。生成静态的AOP代理类（生成*.class文件已经被改掉了，需要使用特定的编译器）。以AspectJ为代表 —— 静态AOP框架。
AOP框架在运行阶段，动态生成AOP代理（在内存中动态地生成AOP代理类），以实现对目标对象的增强。它不需要特殊的编译器。以Spring AOP为代表。—— 动态AOP框架。
事务简介
前篇介绍了SpringAOP，Spring事务是SpringAOP一个典型的应用。
事务即数据库事务，指同一批次对数据的读写要么全成功，要么全失败，用以保证数据的一致性，是关系统数据库核心功能。编程中通过设置事务手动提交，然后根据情况选择提交事务或者回滚事务。
数据库中事务使用:
BEGIN;#开始事务
update table_name set name=’XXX’ where id=’XXX’;#执行数据库操作
COMMIT; #提交
ROLLBACK;#回滚
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try { //下面这句必须加，不然报错 MultipartResolver resolver = new CommonsMultipartResolver(hsq.getSession().getServletContext()); MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) hsq; //获取一起跟文件传过来的其他参数值 String id = multipartRequest.getParameter("id"); //获取上传上来的文件 Map<String, MultipartFile> fileMap = multipartRequest.getFileMap(); for (Map.Entry<String, MultipartFile> entry : fileMap.entrySet()) { MultipartFile file = entry.getValue(); String fileName = file.getOriginalFilename(); System.out.println(fileName); String path = "C:\\Users\\user\\Desktop\\" + fileName; file.transferTo(new File(path)); } } catch (Exception e) { e.printStackTrace(); } |
from:https://www.cnblogs.com/sanrenblog/p/15648871.html
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