javaʵÏÖͼƬÓëbase64×Ö·û´®Ö®¼äµÄת»»

package cn.com;
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 Base64Test
{
public static void main(String[] args)
{
String strImg = GetImageStr();
System.out.println(strImg);
GenerateImage(strImg);
}
//ͼƬת»¯³Ébase64×Ö·û´®
public static String GetImageStr()
{//½«Í¼Æ¬Îļþת»¯Îª×Ö½ÚÊý×é×Ö·û´®£¬²¢¶ÔÆä½øÐÐBase64±àÂë´¦Àí
String imgFile = "d:\\test.jpg";//´ý´¦ÀíµÄͼƬ
InputStream in = null;
byte[] data = null;
//¶ÁȡͼƬ×Ö½ÚÊý×é
try
{
in = new FileInputStream(imgFile);
data = new byte[in.available()];
in.read(data);
in.close();
}
catch (IOException e)
{
e.printStackTrace();
}
//¶Ô×Ö½ÚÊý×éBase64±àÂë
BASE64Encoder encoder = new BASE64Encoder();
return encoder.encode(data);//·µ»ØBase64±àÂë¹ýµÄ×Ö½ÚÊý×é×Ö·û´®
}

//base64×Ö·û´®×ª»¯³ÉͼƬ
public static boolean GenerateImage(String imgStr)
{ //¶Ô×Ö½ÚÊý×é×Ö·û´®½øÐÐBase64½âÂë²¢Éú³ÉͼƬ
if (imgStr == null) //ͼÏñÊý¾ÝΪ¿Õ
return false;
BASE64Decoder decoder = new BASE64Decoder();
try
{
//Base64½âÂë
byte[] b = decoder.decodeBuffer(imgStr);
for(int i=0;i<b.length;++i)
{
if(b[i]<0)
{//µ÷ÕûÒì³£Êý¾Ý
b[i]+=256;
}
}
//Éú³ÉjpegͼƬ
String imgFilePath = "d:\\222.jpg";//ÐÂÉú³ÉµÄͼƬ
OutputStream out = new FileOutputStream(imgFilePath);
out.write(b);
out.flush();
out.close();
return true;
}