java get post 请求返回json+查看系统信息

实例代码：

package com.util;

import java.io.IOException;
import java.net.URLDecoder;
import java.util.Properties;

import com.alibaba.fastjson.JSONObject;
import org.apache.commons.httpclient.HttpStatus;
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.params.CoreConnectionPNames;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class HttpRequestPostGetUtils {
	private static Logger logger = LoggerFactory
			.getLogger(HttpRequestPostGetUtils.class); // 日志记录

	public static void main(String[] args) {
		JSONObject jo = new JSONObject();
		Properties props = System.getProperties();
		System.out.println("Java的运行环境版本：" + props.getProperty("java.version"));
		System.out.println("Java的运行环境供应商：" + props.getProperty("java.vendor"));
		System.out.println("Java供应商的URL："+ props.getProperty("java.vendor.url"));
		System.out.println("Java的安装路径：" + props.getProperty("java.home"));
		System.out.println("Java的虚拟机规范版本："+ props.getProperty("java.vm.specification.version"));
		System.out.println("Java的虚拟机规范供应商："+ props.getProperty("java.vm.specification.vendor"));
		System.out.println("Java的虚拟机规范名称："+ props.getProperty("java.vm.specification.name"));
		System.out.println("Java的虚拟机实现版本："+ props.getProperty("java.vm.version"));
		System.out.println("Java的虚拟机实现供应商："+ props.getProperty("java.vm.vendor"));
		System.out.println("Java的虚拟机实现名称：" + props.getProperty("java.vm.name"));
		System.out.println("Java运行时环境规范版本："+ props.getProperty("java.specification.version"));
		System.out.println("Java运行时环境规范供应商："+ props.getProperty("java.specification.vender"));
		System.out.println("Java运行时环境规范名称："+ props.getProperty("java.specification.name"));
		System.out.println("Java的类格式版本号："+ props.getProperty("java.class.version"));
		System.out.println("Java的类路径：" + props.getProperty("java.class.path"));
		System.out.println("加载库时搜索的路径列表："+ props.getProperty("java.library.path"));
		System.out.println("默认的临时文件路径：" + props.getProperty("java.io.tmpdir"));
		System.out.println("一个或多个扩展目录的路径：" + props.getProperty("java.ext.dirs"));
		System.out.println("操作系统的名称：" + props.getProperty("os.name"));
		System.out.println("操作系统的构架：" + props.getProperty("os.arch"));
		System.out.println("操作系统的版本：" + props.getProperty("os.version"));
		System.out.println("文件分隔符：" + props.getProperty("file.separator")); // 在 // unix // 系统中是＂／＂
		System.out.println("路径分隔符：" + props.getProperty("path.separator")); // 在 // unix // 系统中是＂:＂
		System.out.println("行分隔符：" + props.getProperty("line.separator")); // 在 // unix系统中是＂/n＂
		System.out.println("用户的账户名称：" + props.getProperty("user.name"));
		System.out.println("用户的主目录：" + props.getProperty("user.home"));
		System.out.println("用户的当前工作目录：" + props.getProperty("user.dir"));

		HttpRequestPostGetUtils.httpGet("https://weibo.com/tv/v/G6VGf9AS1?fid=1034:3544134d64407814b34acf86a13524ce");

		

	}

	/**
	 * httpPost
	 * 
	 * @param url
	 *            路径
	 * @param jsonParam
	 *            参数
	 * @return
	 */
	public static JSONObject httpPost(String url, JSONObject jsonParam) {
		return httpPost(url, jsonParam, false);
	}

	/**
	 * post请求
	 * 
	 * @param url
	 *            url地址
	 * @param jsonParam
	 *            参数
	 * @param noNeedResponse
	 *            不需要返回结果
	 * @return
	 */
	public static JSONObject httpPost(String url, JSONObject jsonParam,
			boolean noNeedResponse) {
		// post请求返回结果
		DefaultHttpClient httpClient = new DefaultHttpClient();
		JSONObject jsonResult = null;
		HttpPost method = new HttpPost(url);
		try {
			if (null != jsonParam) {
				// 解决中文乱码问题
				StringEntity entity = new StringEntity(jsonParam.toString(),
						"utf-8");
				entity.setContentEncoding("UTF-8");
				entity.setContentType("application/json");
				method.setEntity(entity);
			}
			HttpResponse result = httpClient.execute(method);
			url = URLDecoder.decode(url, "UTF-8");
			/** 请求发送成功，并得到响应 **/
			if (result.getStatusLine().getStatusCode() == 200) {
				String str = "";
				try {
					/** 读取服务器返回过来的json字符串数据 **/
					str = EntityUtils.toString(result.getEntity());
					if (noNeedResponse) {
						return null;
					}
					/** 把json字符串转换成json对象 **/
					jsonResult = (JSONObject) JSONObject.parse(str);
				} catch (Exception e) {
					logger.error("post请求提交失败:" + url, e);
				}
			}
		} catch (IOException e) {
			logger.error("post请求提交失败:" + url, e);
		}
		return jsonResult;
	}

	/**
	 * 发送get请求
	 * 
	 * @param url
	 *            路径
	 * @return
	 */
	public static com.alibaba.fastjson.JSONObject httpGet(String url) {
		// get请求返回结果
		JSONObject jsonResult = null;
		try {
			DefaultHttpClient client = new DefaultHttpClient();
			client.getParams().setParameter(
					CoreConnectionPNames.CONNECTION_TIMEOUT, 5000);
			client.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,
					5000);
			// 发送get请求
			HttpGet request = new HttpGet(url);
			HttpResponse response = client.execute(request);

			/** 请求发送成功，并得到响应 **/
			if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
				/** 读取服务器返回过来的json字符串数据 **/
				String strResult = EntityUtils.toString(response.getEntity());
				/** 把json字符串转换成json对象 **/
				jsonResult = (JSONObject) JSONObject.parse(strResult);
				url = URLDecoder.decode(url, "UTF-8");
			} else {
				logger.error("get请求提交失败:" + url);
			}
		} catch (IOException e) {
			logger.error("get请求提交失败:" + url, e);
		}
		return jsonResult;
	}
}