java之文件与base64字符之间的相互转换

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();
      }
 }


}