java的post请求

package com.huazhu;

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.util.List;
import java.util.Map;

public class httppost {

	public static void main(String[] args) {
		httppost send=new httppost();
		send.sendpost("https://passport.cnblogs.com/user/signin", "input1":"=","input2":"	
}
	public void sendpost(String urlAddess,String paramVaule) throws IOException
	{
		try {
			HttpURLConnection urlcon=null;
			URL url=new URL(urlAddess);
			urlcon=(HttpURLConnection) url.openConnection();
			urlcon.setDoOutput(true);
			urlcon.setReadTimeout(5000);
			urlcon.setConnectTimeout(5000);
			urlcon.connect();
			
			PrintWriter pw=new PrintWriter(urlcon.getOutputStream());
			pw.print(paramVaule);
			pw.flush();
			
			BufferedReader bf=new BufferedReader(new InputStreamReader(urlcon.getInputStream(),"utf-8"));
			String line=bf.readLine();
			while(line!=null)
			{
				System.out.println(line);
				line=bf.readLine();
			}
			Map<String,List<String>> map=urlcon.getHeaderFields();
			List list=(List)map.get("Set-Cookie");
			for(int i=0;i<list.size();i++)
			{
				System.out.println(list.get(i));
			}
			
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}