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();

  }

 }

}