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  • 服务器实现处理GET和POST

    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.OutputStream;
    import java.io.OutputStreamWriter;
    import java.net.ServerSocket;
    import java.net.Socket;
    import java.net.URLDecoder;
    import java.util.regex.Matcher;
    import java.util.regex.Pattern;
    
    public class HttpServer {
        
        public static void doGet(String message,OutputStream op) throws IOException{
            
            
            
            //显示报文
            System.out.println(message);
            
            Pattern p = Pattern.compile("/?a=(.+) HTTP");
            
            Matcher page = p.matcher(message);
            
            String result = "";
            
            
            while(page.find()){
                
                //System.out.println(page.group(1));
                result = page.group(1);
                
                
                
            }
            
            result = URLDecoder.decode(result, "GBK");
        
            
           
            
            //关键在于utf-8
            OutputStreamWriter osw = new OutputStreamWriter(op,"utf-8");
            
            
            
            osw.write("HTTP/1.1 200 OK
    ");
            osw.write("Server: Apache-Coyote/1.1
    ");
            //osw.write("Set-Cookie: JSESSIONID=03493794995CE31A0F131787B6C6CBB2; Path=/; HttpOnly
    ");
            osw.write("Content-Type: text/html;charset=UTF-8
    ");
            osw.write("Transfer-Encoding: chunked
    ");
            
            
           
            
            osw.write("Date: Tue, 19 May 2015 02:48:27 GMT
    ");
            osw.write("
    ");
            osw.write("c9
    ");
            osw.write("<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    ");
            osw.write("<HTML>
    ");
            osw.write("  <HEAD><TITLE>A Servlet</TITLE></HEAD>
    ");
            osw.write("  <BODY>
    ");
            
            
            //osw.write("    This is myServ, using the GET method
    ");
            osw.write("你输入了  : "+result);
            
            
            
           
            osw.write("  </BODY>
    ");
            osw.write("</HTML>
    ");
            osw.write("
    ");
            //osw.write("0");
            osw.write("
    ");
            osw.write("
    ");
            osw.flush();
            osw.close();
            op.flush();
            op.close();
           
            
            
            
        }
        
        public static void doPost(String message,OutputStream op,byte [] buf) throws IOException{
            
            //显示报文
            System.out.println(message);
            
            //收取数据
            new Thread(new Runnable(){
    
                @Override
                public void run() {
                    
                    Pattern p = Pattern.compile("filename="(.+)"");
                    
                    Matcher page = p.matcher(message);
                    
                    String filename = "";
                    
                    
                    while(page.find()){
                        
                        System.out.println(page.group(1));
                        filename = page.group(1);
                        
                    }
                    
                    File file = new File("C:\Users\binbin\Desktop\计网作业\ReciveFile"+"\"+filename);
                    //if(!file.exists()){
                        
                        try {
                            file.createNewFile();
                            
                            FileOutputStream fop = new FileOutputStream(file);
                            
                            fop.write(buf,556,20);
                            
                            fop.close();
                            
                            
                            
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                        
                    //}
                    
                }
                
                
            }).start();
           
            
            
            
            //关键在于utf-8
            OutputStreamWriter osw = new OutputStreamWriter(op,"utf-8");
            
            
            
            osw.write("HTTP/1.1 200 OK
    ");
            osw.write("Server: Apache-Coyote/1.1
    ");
            //osw.write("Set-Cookie: JSESSIONID=03493794995CE31A0F131787B6C6CBB2; Path=/; HttpOnly
    ");
            osw.write("Content-Type: text/html;charset=UTF-8
    ");
            osw.write("Transfer-Encoding: chunked
    ");
            osw.write("Date: Tue, 19 May 2015 02:48:27 GMT
    ");
            osw.write("
    ");
            osw.write("c9
    ");
            osw.write("<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    ");
            osw.write("<HTML>
    ");
            osw.write("  <HEAD><TITLE>A Servlet</TITLE></HEAD>
    ");
            osw.write("  <BODY>
    ");
            osw.write("    Post Method:UpLoad OK!
    ");
            osw.write("  </BODY>
    ");
            osw.write("</HTML>
    ");
            osw.write("
    ");
            osw.write("
    ");
            osw.write("
    ");
            osw.flush();
            osw.close();
            op.flush();
            op.close();
            
            
            
            
        }
        
    
        
        
        public static void main(String[] args) throws IOException, InterruptedException {  
            
            // 服务器监听端口号 
            ServerSocket serverSocket = new ServerSocket(8099);  
            
            
            //死循环服务器一直运行
            while(true){
          
            // 等待接收请求,这是一个阻塞的方法,当请求到来的时候才会继续向下执行  
            Socket socket = serverSocket.accept(); 
            
           
          
            // 获取请求内容  InputStream
            InputStream is = socket.getInputStream(); 
            
            Thread.sleep(500);
            
            // 返回报文 用 OutputStream
            OutputStream out = socket.getOutputStream();
            
            File file = new File("GetMetho.txt");
            
            FileOutputStream fop = new FileOutputStream(file);
            
            
            //获取报文
            int len = 0;
            byte [] buf = new byte[1024];
            String message = "";
            while((len=is.read(buf))!=-1){
                
                message += new String(buf,0,len);
                /*
                if(message.contains("favicon.ico")||message.contains("google.com:443"))
                    break;
                */
                fop.write(buf,0,len);
                break;
                
            }
            
            fop.close();
            
            //System.out.println(message);
            
            
            if(message.contains("favicon.ico")||message.contains("google.com:443"))
                continue;
            
          //如果是Post
            else if(message.contains("POST")){
                HttpServer.doPost(message,out,buf);
            }
            
            //如果是Get
            else if(message.contains("GET")){
                //System.out.println(message);
                HttpServer.doGet(message,out);
            }
            
            else;
            
          
                
            is.close();
            
                
            
            
            
           }//end while
            
            
            
            
        }  
    
    }

    GET的html:

    <html>
    <body>
    
    <form action="http://localhost:8099" method="get">
    <input name="a" type="text" value="Hello" />
    <input name="" type="submit" value="提交" />
    </form>
    
    </body>
    </html>

    POST的html:

    <form action="http://localhost:8099" enctype="MULTIPART/FORM-DATA"
    
        method="POST">  
        <INPUT NAME="userfile1" TYPE="file"> 
        <input type="submit" value="submit"/>  
    </form>  

    POST其实是水的,因为看书里面获取上传的文件内容那段代码太长了,不想写。。就直接数了一下前面报文有多少字,直接从那后面开始读了。

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  • 原文地址:https://www.cnblogs.com/wzben/p/5421559.html
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