httpClient模拟登陆校内某系统

package com.huowolf;

import java.util.ArrayList;

import java.util.List;

import org.apache.http.HttpEntity;

import org.apache.http.NameValuePair;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.CloseableHttpResponse;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClients;

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.util.EntityUtils;

public class Demo1 {

	private static CloseableHttpClient httpclient = HttpClients.createDefault();

	public static void main(String[] args) {

		List<NameValuePair> params = new ArrayList<NameValuePair>();

		params.add(new BasicNameValuePair("loginName", "2013023024"));

		params.add(new BasicNameValuePair("password", "2013023024"));

		String url = "http://172.16.51.37/";

		post(url, params);

	}

	private static void post(String url,List<NameValuePair> params) {

		String body = null;

		HttpPost httpPost = null;

		CloseableHttpResponse response = null;

		try {

			httpPost = new HttpPost(url);

			httpPost.setEntity(new UrlEncodedFormEntity(params));	//设置參数

			response = httpclient.execute(httpPost); 				//发送请求

			System.out.println(response.getStatusLine());			//打印响应状态

			HttpEntity entity = response.getEntity();			 	//获取返回数据

			body = EntityUtils.toString(entity);

			if(entity!=null)

			{

				System.out.println(body);

			}

		} catch (Exception e) {

			e.printStackTrace();

		}finally{

			try {

				httpclient.close();

			} catch (Exception e2) {

				e2.printStackTrace();

			}

		}

	}

}