封装的http的doPost请求和doGet请求

1.maven依赖:

<dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.4</version> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.3</version> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.2.1</version> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpcore</artifactId> <version>4.2.1</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency>

2.工具包代码:

/** * @文件名称: HttpUtil.java * @描述: TODO * @作者： wuwh * @时间：2018年4月9日 上午11:08:27 * @版本：V1.0 */ package com.skiff.www; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.URI; import java.net.URLEncoder; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.Iterator; import java.util.List; import java.util.Map; import org.apache.commons.lang3.StringUtils; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.NameValuePair; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.apache.http.protocol.HTTP; import org.apache.http.util.EntityUtils; import org.apache.log4j.Logger; /** * @类功能说明： 封装的http的doPost()和doGet()方法 * 需要依赖的jar包: * commons-lang3-3.4.jar * commons-logging-1.2.jar * httpclient-4.3.5.jar * httpcore-4.4.1.jar * log4j-1.2.17.jar * @作者： wuwh * @创建时间：2018年4月9日 上午11:08:27 * @版本：V1.0 */ public class HttpUtil { private static Logger logger = Logger.getLogger(HttpUtil.class); /** * 方法功能说明： http的doGet请求 * @参数： @param url * @参数： @param map * @参数： @return * @return String * @throws */ public static String doGet(String url,Map map) { String params = HttpUtil.formatUrlMap(map, false, false); //拼接成的带参数的url url = url+"?"+params; try { HttpClient client = new DefaultHttpClient(); //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()); return strResult; } } catch (IOException e) { logger.error("HttpUtil.doGet():出错了",e); } return null; } /** * post请求(用于key-value格式的参数) * @param url * @param params * @return */ public static String doPost(String url, Map params){ BufferedReader in = null; try { // 定义HttpClient HttpClient client = new DefaultHttpClient(); // 实例化HTTP方法 HttpPost request = new HttpPost(); request.setURI(new URI(url)); //设置参数 List<NameValuePair> nvps = new ArrayList<NameValuePair>(); for (Iterator iter = params.keySet().iterator(); iter.hasNext();) { String name = (String) iter.next(); String value = String.valueOf(params.get(name)); nvps.add(new BasicNameValuePair(name, value)); //System.out.println(name +"-"+value); } request.setEntity(new UrlEncodedFormEntity(nvps,HTTP.UTF_8)); HttpResponse response = client.execute(request); int code = response.getStatusLine().getStatusCode(); if(code == 200){ //请求成功 in = new BufferedReader(new InputStreamReader(response.getEntity() .getContent(),"utf-8")); StringBuffer sb = new StringBuffer(""); String line = ""; String NL = System.getProperty("line.separator"); while ((line = in.readLine()) != null) { sb.append(line + NL); } in.close(); return sb.toString(); } else{ // logger.error("HttpUtil.doPost():状态码："+ code); return null; } } catch(Exception e){ logger.error("HttpUtil.doPost():出错了",e); return null; } } /** * * 方法用途: 对所有传入参数按照字段名的Unicode码从小到大排序（字典序），并且生成url参数串<br> * 实现步骤: <br> * * @param paraMap 要排序的Map对象 * @param urlEncode 是否需要URLENCODE * @param keyToLower 是否需要将Key转换为全小写 * true:key转化成小写，false:不转化 * @return */ public static String formatUrlMap(Map<String, String> paraMap, boolean urlEncode, boolean keyToLower) { String buff = ""; Map<String, String> tmpMap = paraMap; try { List<Map.Entry<String, String>> infoIds = new ArrayList<Map.Entry<String, String>>(tmpMap.entrySet()); // 对所有传入参数按照字段名的 ASCII 码从小到大排序（字典序） Collections.sort(infoIds, new Comparator<Map.Entry<String, String>>() { @Override public int compare(Map.Entry<String, String> o1, Map.Entry<String, String> o2) { return (o1.getKey()).toString().compareTo(o2.getKey()); } }); // 构造URL 键值对的格式 StringBuilder buf = new StringBuilder(); for (Map.Entry<String, String> item : infoIds) { //StringUtils类需要依赖commons-lang3.jar包 if (StringUtils.isNotBlank(item.getKey())) { String key = item.getKey(); String val = item.getValue(); if (urlEncode) { val = URLEncoder.encode(val, "utf-8"); } if (keyToLower) { buf.append(key.toLowerCase() + "=" + val); } else { buf.append(key + "=" + val); } buf.append("&"); } } buff = buf.toString(); if (buff.isEmpty() == false) { buff = buff.substring(0, buff.length() - 1); } } catch (Exception e) { logger.error("HttpUtil.formatUrlMap():出错了",e); return null; } return buff; } } 3.调用代码:

/** * @文件名称: HttpUtilTest.java * @描述: TODO * @作者： wuwh * @时间：2018年4月9日 上午11:28:00 * @版本：V1.0 */ package com.skiff.www; import java.util.HashMap; import java.util.Map; /** * @类功能说明： * @作者： wuwh * @创建时间：2018年4月9日 上午11:28:00 * @版本：V1.0 */ public class HttpUtilTest { public static void main1(String[] args) { Map map = new HashMap<>(); map.put("token", "XTIeQIE7wg4bGMF4fAbi"); map.put("openId", ""); map.put("mobilePhone", "15011222345"); map.put("id", "47"); String url = "http://120.78.190.109:8087/app/scenic/detail"; String result = HttpUtil.doGet(url,map); System.out.println(result); } public static void main(String[] args) { String url = "http://120.78.190.109:8087/app/scenic/detail"; Map map = new HashMap<>(); map.put("token", "XTIeQIE7wg4bGMF4fAbi"); map.put("openId", ""); map.put("mobilePhone", "15011222345"); map.put("id", "47"); String result = null; try { result = HttpUtil.doPost(url, map); } catch (Exception e) { e.printStackTrace(); } System.out.println(result); } }