关于XML文件加密（进来就有分，分不够再加）

[zblaoshu1979]

我现在想加密XML文件，大家有什么好的方法和代码吗？

[hbwhwang]

是想加密整个XML文件，还是加密里面的数据？

[zblaoshu1979]

就加密文件就行

[zblaoshu1979]

如果有数据加密的方法更好，谢谢一楼

[hbwhwang]

如果加密强度不高，可以用对称加密算法，比如DES。如果强度需求高，可以用非对称算法，比如RSA。

[hbwhwang]

去看看我回答的这个帖子：
http://community.csdn.net/Expert/topic/4852/4852512.xml?temp=.9543726

[zblaoshu1979]

用这些算法我倒是知道，就是不知道怎么实现

[zblaoshu1979]

好，我看一看，谢谢

[zblaoshu1979]

我用这个程序解密了之后XML文件打不开了

[hbwhwang]

你贴个XML，让我试

[zblaoshu1979]

<?xml version="1.0" ?>
- <!-- This Listing provides the sample XML File which will be encrypted.
-->
- <purchaseOrder>
- <Order>
<BookName>Soccer For Dummies</BookName>
<ItemId>123-958-74598</ItemId>
<Quantity>500</Quantity>
</Order>
- <Payment>
<CardNo>4502-3456-3278-2011</CardNo>
<CardType>VISA</CardType>
<ValidDate>12-10-2004</ValidDate>
</Payment>
</purchaseOrder>

[hbwhwang]

下面的代码我测试过了，没有问题！

import java.io.*;

import javax.crypto.*;
import java.security.*;

public class DESCryptoTest {
public static void main(String[] args) {
Security.addProvider(new com.sun.crypto.provider.SunJCE());

KeyGenerator kg = null;
try {
kg = KeyGenerator.getInstance("DES", "SunJCE");

//指定密钥长度
kg.init(56);

//产生密钥
Key key = kg.generateKey();
System.out.println("Key format: " + key.getFormat());
System.out.println("Key algorithm: " + key.getAlgorithm());

//加密要用Cipher来实现
Cipher cipher = Cipher.getInstance("DES");
System.out.println("Cipher provider: " + cipher.getProvider());
System.out.println("Cipher algorithm: " + cipher.getAlgorithm());

String filename = "e:\\temp\\test.xml";
//读入并加密文件
try {
//输入流
cipher.init(Cipher.ENCRYPT_MODE, key);
BufferedInputStream in = new BufferedInputStream(new FileInputStream(filename));
//输出流
CipherOutputStream out = new CipherOutputStream(new BufferedOutputStream(new FileOutputStream("e:\\temp\\test.xml_bak")), cipher);
int i;
do {
i = in.read();
if (i != -1)
out.write(i);
}
while (i != -1);

in.close();
out.close();
System.out.println("加密文件完成！");
}
catch (Exception ey5) {
System.out.println("Error when encrypt the file");
System.exit(0);
}

try {
cipher.init(Cipher.DECRYPT_MODE, key);
//输出流
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream("e:\\temp\\test2.xml"));
//输入流
CipherInputStream in = new CipherInputStream(new BufferedInputStream(
new FileInputStream("e:\\temp\\test.xml_bak")), cipher);

int i;
do {
i = in.read();
if (i != -1)
out.write(i);
}
while (i != -1);

in.close();
out.close();
System.out.println("解密文件完成！");
}
catch (Exception ey5) {
System.out.println("Error when encrypt the file");
System.exit(0);
}
}
catch (Exception e) {
e.printStackTrace();
}
}
}

[xb1223]

强！
顶先！

[xb1223]

强！
顶先！

[xb1223]

强！
顶先！

[liyouli]

顶.JF

[zblaoshu1979]

好，谢谢，我测试一下

[zwgs1985]

顶