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();
		}
	}
}