httpClient工具类

/** * 2017年9月6日下午3:38:48 */package com.jjmc.utils;import java.io.IOException;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.Set;import org.apache.http.HttpEntity;import org.apache.http.NameValuePair;import org.apache.http.ParseException;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;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;/** * * @author huangtao * 2017年9月6日下午3:38:48 * HttpClientTest * @parameter * TODO * */public class HttpClientUtil {//提交方式private final static String POST = "post";private final static String GET = "get";//默认字符编码private final static String ENCODING = "UTF-8";/*** post提交，指定字符编码* @param url* @param params* @param encoding* @return*/public static String doPost(String url, Map<String, Object> params, String encoding) {CloseableHttpClient httpClient = HttpClients.createDefault();HttpPost post = new HttpPost(url);if(params != null) {//处理参数HttpEntity entity = handleParam(params, encoding);//添加参数post.setEntity(entity);}CloseableHttpResponse response = null;String content = null;try {response = httpClient.execute(post);content = EntityUtils.toString(response.getEntity());} catch (Exception e) {e.printStackTrace();} finally {close(response, httpClient);}return content;} /*** post提交，使用默认字符编码UTF-8* @param url* @param params* @return*/public static String doPost(String url, Map<String, Object> params) {return doPost(url, params, ENCODING);}/*** get提交，指定字符编码* @param url* @param params* @param encoding* @return*/public static String doGet(String url, Map<String, Object> params, String encoding) {CloseableHttpClient httpClient = HttpClients.createDefault();HttpGet get = new HttpGet(url);if(params != null) {//处理参数HttpEntity entity = handleParam(params, encoding);try {String paramStr = EntityUtils.toString(entity);get = new HttpGet(url + "?" + paramStr);} catch (Exception e) {e.printStackTrace();return null;} }CloseableHttpResponse response = null;String content = null;try {response = httpClient.execute(get);content = EntityUtils.toString(response.getEntity());} catch (Exception e) {e.printStackTrace();} finally {close(response, httpClient);}return content;}/*** get提交，使用默认字符编码UTF-8* @param url* @param params* @return*/public static String doGet(String url, Map<String, Object> params) {return doGet(url, params, ENCODING);}/*** 提交请求，指定字符编码* @param type* @param url* @param params* @param encoding* @return*/public static String service(String type, String url, Map<String, Object> params, String encoding) {if(POST.equals(type)) {return doPost(url, params, encoding);}else if(GET.equals(type)) {return doGet(url, params, encoding);}else {return null;}}/*** 提交请求，使用默认字符编码UTF-8* @param type* @param url* @param params* @return*/public static String service(String type, String url, Map<String, Object> params) {return service(type, url, params, ENCODING);}/*** 处理参数* @param params* @return*/private static HttpEntity handleParam(Map<String, Object> params, String encoding) {List<NameValuePair> pList = new ArrayList<NameValuePair>();Set<String> keys = params.keySet();for(String key : keys) {Object value = params.get(key);try {//处理数组Object[] objs = (Object[])value;for(Object obj : objs) {pList.add(new BasicNameValuePair(key, obj.toString()));}}catch(Exception e) {//处理普通类型pList.add(new BasicNameValuePair(key, value.toString()));}}UrlEncodedFormEntity uefEntity = null;try {uefEntity = new UrlEncodedFormEntity(pList, encoding);} catch (Exception e) {e.printStackTrace();}return uefEntity;}/*** 关闭* @param response* @param httpClient*/private static void close(CloseableHttpResponse response, CloseableHttpClient httpClient) {try{if(response != null) {response.close();}if(httpClient != null) {httpClient.close();}}catch(Exception e) {e.printStackTrace();}}public static void main(String[] args) throws ParseException, IOException {Map<String, Object> params = new HashMap<String, Object>();params.put("name", "张");String content = doPost("http://127.0.0.1:8080/xxxxx/xxxxx", null);System.out.println(content);}}