java加解密操做过程当中的中文乱码问题

import javax.crypto.Cipher; import javax.crypto.KeyGenerator; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import org.apache.commons.codec.BinaryDecoder; import org.apache.commons.codec.binary.Hex; public class DESDemo { public static final String src = "des test"; public static void main(String[] args) { jdkDES(); bcDES(); } private static void bcDES() { } private static void jdkDES() { try{ //生成KEY KeyGenerator keyGenerator = KeyGenerator.getInstance("DES"); keyGenerator.init(56); System.out.println(keyGenerator.getAlgorithm()); System.out.println(keyGenerator.getProvider()); SecretKey secretKey = keyGenerator.generateKey(); byte[] bytesKey = secretKey.getEncoded(); System.out.println(secretKey.getAlgorithm()); System.out.println(secretKey.getFormat()); //经过KEY转换生成密钥 DESKeySpec desKeySpec = new DESKeySpec(bytesKey); SecretKeyFactory factory = SecretKeyFactory.getInstance("DES"); SecretKey convertedKey = factory.generateSecret(desKeySpec); //加密 Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");// 算法/工做方式/填充方式 cipher.init(Cipher.ENCRYPT_MODE, convertedKey); byte[] result = cipher.doFinal("要加密的内容".getBytes()); System.out.println("jdk des encrypt:" + Hex.encodeHexString(result)); //解密 cipher.init(Cipher.DECRYPT_MODE,convertedKey); result = cipher.doFinal(result); // System.out.println("jdk des decrypt:" + new String(result)); //jdk des decrypt:?????????? 直接输出会乱码 System.out.println("jdk des decrypt:" + new String( result,"utf-8" )); //jdk des decrypt:?????????? 依旧乱码 } catch(Exception e) { e.printStackTrace(); } } } 

请问windows系统默认编码是gbk吗？

• 2015年10月15日提问
 
• 1 评论
 
• 邀请回答

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4 个回答

 

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仍是楼主的代码, 没发现什么乱码:

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

public class DESDemo { public static void main(String[] args) { try{ //生成KEY KeyGenerator keyGenerator = KeyGenerator.getInstance("DES"); keyGenerator.init(56); System.out.println(keyGenerator.getAlgorithm()); System.out.println(keyGenerator.getProvider()); SecretKey secretKey = keyGenerator.generateKey(); byte[] bytesKey = secretKey.getEncoded(); System.out.println(secretKey.getAlgorithm()); System.out.println(secretKey.getFormat()); //经过KEY转换生成密钥 DESKeySpec desKeySpec = new DESKeySpec(bytesKey); SecretKeyFactory factory = SecretKeyFactory.getInstance("DES"); SecretKey convertedKey = factory.generateSecret(desKeySpec); //加密 Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");// 算法/工做方式/填充方式 cipher.init(Cipher.ENCRYPT_MODE, convertedKey); byte[] result = cipher.doFinal("要加密的内容".getBytes()); //解密 cipher.init(Cipher.DECRYPT_MODE,convertedKey); result = cipher.doFinal(result); System.out.println("jdk des decrypt:" + new String(result)); } catch(Exception e) { e.printStackTrace(); } } }

文件保存的编码为: gb2312 的时候运行结果:

文件保存的编码为: utf-8 的时候运行结果:

由于Windows的控制台不能显示 utf-8 编码的内容, 因此我用 > 把结果输出到 11.txt 的文件中,
上面的截图中包含 11.txt 的内容, 能够看到汉字仍是正确的.
11.txt 文件的编码为 utf-8.

在文件以UTF-8编码保存时, 使用下面的方式能够正确显示:

同理当文件是以gb2312编码保存的时候, 能够省略这个参数,或者指定为 gb2312 就能够正常显示了:

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附: Linux 下你的代码的执行结果(文件的编码为 utf-8)
Linux 下个人Console的默认编码为UTF-8,因此能够正常显示UTF-8编码的汉字.

总结一下就是 你源文件保存的编码,与你使用 new String 时传递的第二个参数 不一致致使的.

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