base64实现文件与字符串之间的转换(转)

package com.ysj;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import sun.misc.BASE64Decoder;

import sun.misc.BASE64Encoder;

/**

* 适用大部分格式的文件

* @author Administrator

*

*/

public class Test {

public static void main(String[] args) {

Test t = new Test();

//String str = t.GetImageStr("D:/My Documents/scriptxReg.zip");

//String str = t.GetImageStr("D:/My Documents/ip.jpg");

String str = t.GetImageStr("D:/My Documents/哎呀妈呀哎呀妈呀真漂亮.mp3");

System.out.println(str);

//boolean flag = t.GenerateImage(str, "D:/My Documents/scriptxReg.zip");

//boolean flag = t.GenerateImage(str, "D:/My Documents/ip.jpg");

boolean flag = t.GenerateImage(str, "D:/My Documents/哎呀妈呀哎呀妈呀真漂亮B.mp3");

System.out.println(flag);

}

/**

* 将文件转化为字节数组字符串，并对其进行Base64编码处理

* @param imgFile

* @return

*/

public static String GetImageStr(String imgFile) {

InputStream in = null;

byte[] data = null;

// 读取文件字节数组

try {

in = new FileInputStream(imgFile);

data = new byte[in.available()];

in.read(data);

in.close();

} catch (IOException e) {

e.printStackTrace();

}

// 对字节数组Base64编码

BASE64Encoder encoder = new BASE64Encoder();

// 返回Base64编码过的字节数组字符串

return encoder.encode(data);

}

/**

* 根据字节数组字符串进行Base64解码并生成文件

* @param imgStr

* @param savedImagePath

* @return

*/

public static boolean GenerateImage(String imgStr, String savedImagePath) {

// 文件字节数组字符串数据为空

if (imgStr == null)

return false;

BASE64Decoder decoder = new BASE64Decoder();

try {

// Base64解码

byte[] b = decoder.decodeBuffer(imgStr);

for (int i = 0; i < b.length; ++i) {

{// 调整异常数据

if (b[i] < 0)

b[i] += 256;

}

}

// 生成文件

// String sangImageStr = "D:/My Documents/ip.jpg" ; // 要生成文件的路径.

OutputStream out = new FileOutputStream(savedImagePath);

out.write(b);

out.flush();

out.close();

return true;

} catch (Exception e) {

return false;

}

}

}