Http请求工具类

import java.io.BufferedReader;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.util.Map;/** * HTTP请求链接工具类 * @author zhangpengliang * @version 2017-09-27 * */public class HttpConnectUtil {/*** * 判断接受地址是否连接 *  * @param urlPath * @return boolean */public static boolean isSuccessConnected(String urlPath){URL url;try {url = new URL(urlPath);HttpURLConnection connection = (HttpURLConnection)url.openConnection();connection.setDoInput(true);connection.setDoOutput(true);connection.setRequestMethod("POST");connection.setUseCaches(false);connection.setConnectTimeout(4000);connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");connection.connect();int responseCode = connection.getResponseCode();if(responseCode == 200){return true;}} catch (Exception e) {e.printStackTrace();}return false;}/** * POST 发送请求 * @param urlPath 链接地址URL * @param xml 报文结构xml * @return */public static String post(String urlPath, String xml){OutputStreamWriter  out = null;if(StringUtil.isEmpty(urlPath)){return null;//需要抛出一个错误}try {URL url = new URL(urlPath);HttpURLConnection connection = (HttpURLConnection)url.openConnection();connection.setDoInput(true);connection.setDoOutput(true);connection.setRequestMethod("POST");connection.setUseCaches(false);connection.setConnectTimeout(4000);//下面就是添加头信息connection.setRequestProperty("Content-Type","text/xml");connection.setRequestProperty("charset", "UTF-8");connection.connect();out = new OutputStreamWriter(connection.getOutputStream());out.write(xml);out.flush();out.close();     //读取响应InputStream inputStream = connection.getInputStream();//真正发送请求            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));            String lines;            StringBuffer sb = new StringBuffer("");            while ((lines = reader.readLine()) != null) {                lines = new String(lines.getBytes());                sb.append(lines);            }            System.out.println(sb.toString());            reader.close();                        // 断开连接            connection.disconnect();return sb.toString();}catch(MalformedURLException ee){System.out.println(ee);}catch (FileNotFoundException fileNotFoundException) {fileNotFoundException.printStackTrace();}catch (Exception e) {e.printStackTrace();}finally{if(out != null){try {out.close();} catch (IOException e) {e.printStackTrace();}}}return null;}/** * POST 发送请求 * @param urlPath 链接地址 * @param xml 报文结构xml * @param param 头部信息参数 * @return */public static String post(String urlPath, String xml,Map<String, Object> param){OutputStreamWriter  out = null;if(StringUtil.isEmpty(urlPath)){return null;//需要抛出一个错误}try {URL url = new URL(urlPath);HttpURLConnection connection = (HttpURLConnection)url.openConnection();connection.setDoInput(true);connection.setDoOutput(true);connection.setRequestMethod("POST");connection.setUseCaches(false);connection.setConnectTimeout(4000);//下面就是添加头信息connection.setRequestProperty("Content-Type","text/xml");connection.setRequestProperty("charset", "UTF-8");for(String s:param.keySet()){connection.setRequestProperty(s, param.get(s).toString());}connection.connect();out = new OutputStreamWriter(connection.getOutputStream());out.write(xml);out.flush();out.close();     //读取响应InputStream inputStream = connection.getInputStream();//真正发送请求            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));            String lines;            StringBuffer sb = new StringBuffer("");            while ((lines = reader.readLine()) != null) {                lines = new String(lines.getBytes());                sb.append(lines);            }            System.out.println(sb.toString());            reader.close();                        // 断开连接            connection.disconnect();return sb.toString();}catch(MalformedURLException ee){System.out.println(ee);}catch (FileNotFoundException fileNotFoundException) {fileNotFoundException.printStackTrace();}catch (Exception e) {e.printStackTrace();}finally{if(out != null){try {out.close();} catch (IOException e) {e.printStackTrace();}}}return null;}}