Java中使用Base64编码实例

Maven需要引入的jar

<!-- Apache Base64 Libraries -->

<dependency>

<groupId>commons-codec</groupId>

<artifactId>commons-codec</artifactId>

<version>1.10</version>

</dependency>

<dependency>

<groupId>org.bouncycastle</groupId>

<artifactId>bcprov-jdk15on</artifactId>

<version>1.52</version>

</dependency>

代码

package com.liyong.base64;

import java.io.IOException;
import java.io.UnsupportedEncodingException;

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

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class Base64Test {

/** 默认编码UTF-8 */
public static final String DEFAULT_ENCODING = "UTF-8";

public static void main(String[] args) {
String src = "Base64 编码测试";
jdkBase64(src);
System.out.println("--------------");
ccBase64(src);
System.out.println("--------------");
bcBase64(src);
}

/**
* JDK提供实现Base64编码
*/
public static void jdkBase64(String src) {
try {
BASE64Encoder encoder = new BASE64Encoder();
String encodeStr = encoder.encode(src.getBytes(DEFAULT_ENCODING));
System.out.println("JDK BASE64 encoder: " + encodeStr);

BASE64Decoder decoder = new BASE64Decoder();
String decodeStr = new String(decoder.decodeBuffer(encodeStr), DEFAULT_ENCODING);
System.out.println("JDK BASE64 decoder: " + decodeStr);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 用Apache的common codes实现
*/
public static void ccBase64(String src) {
try {
byte[] encodeBytes = Base64.encodeBase64(src.getBytes(DEFAULT_ENCODING));
String encodeStr = new String(encodeBytes, DEFAULT_ENCODING);
System.out.println("CC BASE64 encoder: " + encodeStr);

byte[] decodeBytes = Base64.decodeBase64(encodeStr.getBytes(DEFAULT_ENCODING));
String decodeStr = new String(decodeBytes, DEFAULT_ENCODING);
System.out.println("CC BASE64 decoder: " + decodeStr);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}

/**
* 用bouncy castle实现
*/
public static void bcBase64(String src) {
try {
byte[] encodeBytes = org.bouncycastle.util.encoders.Base64.encode(src.getBytes(DEFAULT_ENCODING));
String encodeStr = new String(encodeBytes, DEFAULT_ENCODING);
System.out.println("BC BASE64 encoder: " + encodeStr);

byte[] decodeBytes = org.bouncycastle.util.encoders.Base64.decode(encodeStr);
String decodeStr = new String(decodeBytes, DEFAULT_ENCODING);
System.out.println("BC BASE64 decoder: " + decodeStr);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
}