Java使用base64加解密

import java.io.IOException;

import java.lang.reflect.Method;

import org.apache.commons.codec.binary.Base64;

public class Base64Utils {

// %%%%%%%%%%%%%%%%%%%% 方法一 %%%%%%%%%%%%%%%%%%%%

/***

* encode by Base64

*/

public static String encodeBase64(byte[] input) throws Exception {

Class clazz = Class.forName("com.sun.org.apache.xerces.internal.impl.dv.util.Base64");

Method mainMethod = clazz.getMethod("encode", byte[].class);

mainMethod.setAccessible(true);

Object retObj = mainMethod.invoke(null, new Object[] { input });

return (String) retObj;

}

/***

* decode by Base64

*/

public static byte[] decodeBase64(String input) throws Exception {

Class clazz = Class.forName("com.sun.org.apache.xerces.internal.impl.dv.util.Base64");

Method mainMethod = clazz.getMethod("decode", String.class);

mainMethod.setAccessible(true);

Object retObj = mainMethod.invoke(null, input);

return (byte[]) retObj;

}

// %%%%%%%%%%%%%%%%%%%% 方法二 %%%%%%%%%%%%%%%%%%%%

/**

* @param bytes

* @return

*/

public static byte[] decode(final byte[] bytes) {

return Base64.decodeBase64(bytes);

}

/**

* 二进制数据编码为BASE64字符串

*

* @param bytes

* @return

* @throws Exception

*/

public static String base64Encode(final byte[] bytes) {

return new String(Base64.encodeBase64(bytes));

}

// %%%%%%%%%%%%%%%%%%%% 方法三 %%%%%%%%%%%%%%%%%%%%

/**

* 编码

*

* @param bstr

* @return String

*/

public static String BASE64Encode(byte[] bstr) {

return new sun.misc.BASE64Encoder().encode(bstr);

}

/**

* 解码

*

* @param str

* @return string

*/

public static byte[] decode(String str) {

byte[] bt = null;

try {

sun.misc.BASE64Decoder decoder = new sun.misc.BASE64Decoder();

bt = decoder.decodeBuffer(str);

} catch (IOException e) {

e.printStackTrace();

}

return bt;

}

}