20141203图片Base64编码与解码

最近需要将图片通过转码的形式传给移动端，使用了Base64转码与 解码

 

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 Text4 {

public static void main(String[] args) {

              String strImg = GetImageStr();

              System.out.println(strImg);

              System.out.println(strImg.length());

              GenerateImage(strImg);

}

// 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:/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 = "C:/UserImg/xgk2059/111.jpg";// 新生成的图片

              OutputStream out = new FileOutputStream(imgFilePath);

              System.out.println("==============================");

              out.write(b);

              out.flush();

              out.close();

              return true;

              } catch (Exception e) {

              return false;

              }

}

}