网络编程-http连接-GET&POST

package com.net.http;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

public class GetRequest {
    
    private String url;
    private String param;
    public GetRequest(String url,String param){
        this.url=url;
        this.param=param;
    }
    
    
    public String sendRequest(){
        String result="";
        
            URL realUrl;
            try {

                realUrl = new URL(url);

                HttpURLConnection conn = (HttpURLConnection)realUrl.openConnection();

                conn.setRequestMethod("GET");
                conn.setRequestProperty("accept", "*/*");
                conn.setRequestProperty("connection", "Keep-Alive");
                conn.setRequestProperty("user-agent", "Mozilla/4.0(compatible;MSIE 6.0;Windows NT 5.1; SV1)");
                conn.setDoOutput(true);
                conn.setDoInput(true);
                
                try(PrintWriter out =new PrintWriter(conn.getOutputStream())){
                    out.println(param);
                    out.flush();                    
                }

                Map<String,List<String>> map= conn.getHeaderFields();
                for(String key : map.keySet()){
                    System.out.println(key+ "---->"+map.get(key));
                }
                
                try(BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(),"utf-8"))){
                    String line;
                    while((line=in.readLine())!=null){                        
                        result += "\n" + line;
                        System.out.println(line);
                    }
                }
                
            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return result;    
        
    }

}

package com.net.http;

public class GetTest {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        new GetRequest("http://www.mocky.io/v2/574199bc120000d522a581ba","name=get").sendRequest();
    }

}

package com.net.http;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import java.util.Map;

public class PostRequest {
    
    private String result ="";
    private String url;
    private String parm;
    private String urlName;
    
    public PostRequest(String url, String parm){
        this.url=url;
        this.parm=parm;    
        if(parm==null){
            this.urlName=url;
        }else{
            this.urlName=url+"?"+ parm;
        }
        
    }
    
    public String sendRequest(){
        
        URL realUrl;
        try {
            realUrl = new URL(urlName);

            HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();

            conn.setRequestMethod("POST");
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0(compatible;MSIE 6.0;Windows NT 5.1; SV1)");
            conn.connect();
            
            Map<String,List<String>> map= conn.getHeaderFields();
            for(String key : map.keySet()){
                System.out.println(key+ "---->"+map.get(key));
            }
            
            try(BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()))){
                String line;
                while((line=in.readLine())!=null){                        
                    result += "\n" + line;
                    System.out.println(line);
                }                
            }
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }        
        return result;        
    }
}

package com.net.http;

public class PostTest {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        new PostRequest("http://www.mocky.io/v2/574199bc120000d522a581ba",null).sendRequest();
    }

}