Java图片上传实现代码

import java.io.*; 
import java.net.*; 
/* 
*发送端 
*/ 
class picsend 
{ 
  public static void main(String[] args) throws Exception 
  { 
    if(args.length!=1) 
    { 
      System.out.println("请选择一张.jpg图片"); 
      return; 
    } 
    File file = new File(args[0]); 
    if (!(file.exists() && file.isFile())) 
    { 
      System.out.println("图片有问题(不是文件或不存在)"); 
      return; 
    } 
    if(!file.getName().endsWith(".jpg")) 
    { 
      System.out.println("图片格式不对，请重新选择图片"); 
      return; 
    } 
    if(file.length()>1024*1024*10) 
    { 
      System.out.println("图片过大，无法上传"); 
      return; 
    } 
 
    Socket s = new Socket("192.168.33.1",10006);//建立服务 
    FileInputStream fis = new FileInputStream("d:美女.jpg");//读取图片 
    OutputStream out = s.getOutputStream();//读到的写入 
    byte [] b = new byte[1024]; 
    int len = 0; 
    while((len = fis.read(b))!= -1) 
    { 
      out.write(b,len); 
    } 
    s.shutdownOutput();//标记结束 
    InputStream in = s.getInputStream();//读服务端返回数据 
    byte [] bin = new byte[1024]; 
    int num = in.read(bin); 
    System.out.println(new String(bin,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();//得到ip 
    try 
    { 
      System.out.println(ip+".............connect"); 
      InputStream in = s.getInputStream();//读到流中数据 
      File file = new File(ip+"("+(count)+")"+".jpg"); 
      while(file.exists())//判断文件是否存在 
        file = new File(ip+"("+(count++)+")"+".jpg"); 
 
      FileOutputStream fos = new FileOutputStream(file);//写入 
      byte [] b = new byte[1024]; 
      int len = 0; 
      while((len = in.read(b))!=-1) 
      { 
        fos.write(b,len); 
      } 
      OutputStream out = s.getOutputStream();//写入服务端传过来数据 
      out.write("上传成功！".getBytes()); 
      fos.close(); 
      s.close(); 
    } 
    catch (Exception e) 
    { 
      throw new RuntimeException("上传失败"); 
    } 
       
  } 
} 
/* 
*服务端 
*/ 
class picrece  
{ 
  public static void main(String[] args) throws Exception 
  { 
    ServerSocket ss = new ServerSocket(10006); 
    while(true) 
    { 
      Socket s = ss.accept();//接收 
      new Thread(new picThread(s)).start(); 
    } 
  } 
}