java模拟页面表单登录

简单的通过表单的post请求提交到后台

package testpostlogin;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;
import java.util.StringTokenizer;
 
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;
 
 
 
public class TestPost {
    
    public static void main(String args[]) throws IOException{  
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入用户名：");
        String user_name = scanner.next();
        System.out.println("请输入密码：");
        String password = scanner.next();
        testPost(user_name , password);
    }
 
    public static void testPost(String user_name , String password) throws IOException{
        String login ="";  
        //URL newURL = new URL("http://passport.mop.com/login?method=post");  
        URL newURL = new URL("http://localhost:8080/SSM/loginName.mvc?method=post"); 
        HttpURLConnection conn = (HttpURLConnection) newURL.openConnection();
        conn.setRequestProperty("Connection","keep-alive");
        conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.107 Safari/537.36");
        conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
        conn.setDoInput(true);
        conn.setDoOutput(true);
        conn.setRequestMethod("POST");
        OutputStreamWriter out = new OutputStreamWriter(conn.getOutputStream(),"utf-8");
        //login =login+"loginName="+user_name+"&"+"loginPasswd="+password;
        out.write("name="+user_name+"&password="+password);
        out.flush();
        out.close();        
        Date date=new Date();
        SimpleDateFormat sdf1=new SimpleDateFormat("yyyyMMdd");
        SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddHHmmss");        
        String random1=sdf1.format(date);
        String random=sdf.format(date);
        String path="F:\\postget\\"+random1+"\\"+random+".txt";
        File file = new File(path);    
        // 如果路径不存在,则创建  
        if (!file.getParentFile().exists()) {  
            file.getParentFile().mkdirs();  
        } 
        //判断文件是否存在，不存在就创建文件
        if(!file.exists()&& !file .isDirectory()) {
            file.createNewFile();
        }
        
        InputStream inputStream = conn.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "utf-8"));
        FileOutputStream fis=new FileOutputStream(file);
        String line;
        //将登陆后的页面元素读取并保存到文件中
        while ((line = reader.readLine()) != null) { 
            fis.write(line.getBytes());
            System.out.println(line); 
        }
        reader.close();
    }
}