java之文件与base64字符之间的相互转换

package cn.xuanyuan.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

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

public class FileUitl {

/**
* 将文件转成base64 字符串
* @param path文件路径
* @return  *
* @throws Exception
*/

public static String encodeBase64File(String path) throws Exception {
File file = new File(path);;
FileInputStream inputFile = new FileInputStream(file);
byte[] buffer = new byte[(int) file.length()];
inputFile.read(buffer);
inputFile.close();
return new BASE64Encoder().encode(buffer);

}

/**
* 将base64字符解码保存文件
* @param base64Code
* @param targetPath
* @throws Exception
*/

public static void decoderBase64File(String base64Code, String targetPath)
throws Exception {
byte[] buffer = new BASE64Decoder().decodeBuffer(base64Code);
FileOutputStream out = new FileOutputStream(targetPath);
out.write(buffer);
out.close();

}

/**
* 将base64字符保存文本文件
* @param base64Code
* @param targetPath
* @throws Exception
*/

public static void toFile(String base64Code, String targetPath)
throws Exception {

byte[] buffer = base64Code.getBytes();
FileOutputStream out = new FileOutputStream(targetPath);
out.write(buffer);
out.close();
}

public static void main(String[] args) {
try {
String base64Code = encodeBase64File("D:/0101-2011-qqqq.tif");
System.out.println(base64Code);
decoderBase64File(base64Code, "D:/2.tif");
toFile(base64Code, "D:\\three.txt");
} catch (Exception e) {
e.printStackTrace();

}

}

}