java后台模拟get和post请求返回json数据

已封装工具类

package cn.itsource.weixin.utils;

import java.io.IOException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import constant.WeiXinConstants;
import sun.net.www.http.HttpClient;

public class HttpUtils {
	
	//模拟get请求接口返回json数据格式
	public static String doGet(String url){
		String result="";
		//获取httpclient对象
		DefaultHttpClient httpClient = new DefaultHttpClient();
		//获取get请求对象
		HttpGet httpGet = new HttpGet(url);
		try {
			//发起请求
			HttpResponse response = httpClient.execute(httpGet);
			//获取响应中的数据
			HttpEntity entity = response.getEntity();
			//把entity转换成字符串
			 result = EntityUtils.toString(entity, "utf-8");
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return result;
	}
	
	//post请求
	
	/**
	 * @param args
	 * 
	 * /**
	 * ①：创建一个HttpCient对象 client
	 * ②：创建一个HttpGet对象
	 * ③：使用client发起一个get请求
	 * ④：获取HttpEntity响应
	 * ⑤：解析这个响应对象
	 * @throws Exception
	 */
	public static String doPost(String url,String param){
		String result="";
		//获取httpclient对象
		DefaultHttpClient httpClient = new DefaultHttpClient();
		//获取请求对象
		HttpPost httpPost = new HttpPost(url);
		try {
			//把传入进来的结构树封装
			httpPost.setEntity(new StringEntity(param,"utf-8"));
			//执行一个post请求
			HttpResponse response = httpClient.execute(httpPost);
			//从响应获取数据
			HttpEntity entity = response.getEntity();
			//将httpentity转换为string
			 result = EntityUtils.toString(entity, "utf-8");
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 
		return result;
	}
	//测试
	public static void main(String[] args) {
		String url=接口地址
		String doGet = doGet(url);
				System.out.println(doGet);
	}
}