怎么去用代码改变图片在电脑的格式。

本帖最后由廉伟于 2012-9-4 22:43 编辑

import java.io.*;
import java.net.*;
class PicClient
{
public static void main(String[] args)throws Exception
{
if(args.length!=1)
{
System.out.println("请选择一个jpg格式的图片");
return ;
}
File file = new File(args[0]);
if(!(file.exists() && file.isFile()))
{
System.out.println("该文件有问题，要么补存在，要么不是文件");
return ;
}
if(!file.getName().endsWith(".jpg"))
{
System.out.println("图片格式错误,请重新选择");
return ;
}
if(file.length()>1024*1024*5)
{
System.out.println("文件过大，没安好心");
return ;
}
Socket s = new Socket("192.168.1.254",10007);
FileInputStream fis = new FileInputStream(file);
OutputStream out = s.getOutputStream();
byte[] buf = new byte[1024];
int len = 0;
while((len=fis.read(buf))!=-1)
{
out.write(buf,0,len);
}
//告诉服务端数据已写完
s.shutdownOutput();
InputStream in = s.getInputStream();
byte[] bufIn = new byte[1024];
int num = in.read(bufIn);
System.out.println(new String(bufIn,0,num));
fis.close();
s.close();
}
}
class PicThread implements Runnable
{
private Socket s;
PicThread(Socket s)
{
this.s = s;
}
public void run()
{
int count = 1;
String ip = s.getInetAddress().getHostAddress();
try
{
System.out.println(ip+"....connected");
InputStream in = s.getInputStream();
File dir = new File("d:\\pic");
File file = new File(dir,ip+"("+(count)+")"+".jpg");
while(file.exists())
file = new File(dir,ip+"("+(count++)+")"+".jpg");
FileOutputStream fos = new FileOutputStream(file);
byte[] buf = new byte[1024];
int len = 0;
while((len=in.read(buf))!=-1)
{
fos.write(buf,0,len);
}
OutputStream out = s.getOutputStream();
out.write("上传成功".getBytes());
fos.close();
s.close();
}
catch (Exception e)
{
throw new RuntimeException(ip+"上传失败");
}
}
}
class PicServer
{
public static void main(String[] args) throws Exception
{
ServerSocket ss = new ServerSocket(10007);
while(true)
{
Socket s = ss.accept();
new Thread(new PicThread(s)).start();
}
//ss.close();
}
}

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怎么去用代码改变图片在电脑的格式。

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