编码代码:
FileInputStream fileForInput = new FileInputStream("c:\\test.gif");
String content = new String();
byte[] bytes = new byte[fileForInput.available()];
fileForInput.read(bytes);
content = new sun.misc.BASE64Encoder().encode(bytes); //具体的编码方法
fileForInput.close();
解码代码:
str = "";//编码内容
byte[] result =new sun.misc.BASE64Decoder().decodeBuffer(str.trim());
RandomAccessFile inOut = new RandomAccessFile("c:\\my.jpg","rw");
inOut.write(result);
inOut.close();
第二种
package com.vista.test;
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 MyTest
{
public static void main(String[] args)
{
String strImg = GetImageStr();
GenerateImage(strImg);
}
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 = "d:\\111.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
}
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;
}
}
}