java 实现图片字符串互相转换

package com.app;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;public class img {/** * @param args */public static void main(String[] args) {String data = GetImageStr();System.out.println(data);System.out.println("++++++++++++++++++++++++++++++++++");boolean a = GenerateImage(data);System.out.println(a);}  //图片转化成base64字符串      public static String GetImageStr()      {//将图片文件转化为字节数组字符串，并对其进行Base64编码处理          String imgFile = "C://Users/Administrator/Desktop/1.jpg";//待处理的图片          InputStream in = null;          byte[] data = null;          //读取图片字节数组          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();          return encoder.encode(data);//返回Base64编码过的字节数组字符串      }   //base64字符串转化成图片      public static boolean GenerateImage(String imgStr)      {   //对字节数组字符串进行Base64解码并生成图片          if (imgStr == null) //图像数据为空              return false;          BASE64Decoder decoder = new BASE64Decoder();          try           {              //Base64解码              byte[] b = decoder.decodeBuffer(imgStr);              for(int i=0;i<b.length;++i)              {                  if(b[i]<0)                  {//调整异常数据                      b[i]+=256;                  }              }              //生成jpeg图片              String imgFilePath = "d://222.jpg";//新生成的图片              OutputStream out = new FileOutputStream(imgFilePath);                  out.write(b);              out.flush();              out.close();              return true;          }           catch (Exception e)           {              return false;          }      }  }