1 package com.*.utils;
2
3 import java.io.IOException;
4 import java.net.URI;
5 import java.util.ArrayList;
6 import java.util.List;
7 import java.util.Map;
8 import org.apache.http.NameValuePair;
9 import org.apache.http.client.entity.UrlEncodedFormEntity;
10 import org.apache.http.client.methods.CloseableHttpResponse;
11 import org.apache.http.client.methods.HttpGet;
12 import org.apache.http.client.methods.HttpPost;
13 import org.apache.http.client.utils.URIBuilder;
14 import org.apache.http.entity.ContentType;
15 import org.apache.http.entity.StringEntity;
16 import org.apache.http.impl.client.CloseableHttpClient;
17 import org.apache.http.impl.client.HttpClients;
18 import org.apache.http.message.BasicNameValuePair;
19 import org.apache.http.util.EntityUtils;
20 /**
21 * Created by Administrator on 2018/4/27.
22 */
23 public class HttpClientUtil {
24
25 public static String doGet(String url, Map<String, String> param) {
26
27 // 创建Httpclient对象
28 CloseableHttpClient httpclient = HttpClients.createDefault();
29
30 String resultString = "";
31 CloseableHttpResponse response = null;
32 try {
33 // 创建uri
34 URIBuilder builder = new URIBuilder(url);
35 if (param != null) {
36 for (String key : param.keySet()) {
37 builder.addParameter(key, param.get(key));
38 }
39 }
40 URI uri = builder.build();
41
42 // 创建http GET请求
43 HttpGet httpGet = new HttpGet(uri);
44
45 // 执行请求
46 response = httpclient.execute(httpGet);
47 // 判断返回状态是否为200
48 if (response.getStatusLine().getStatusCode() == 200) {
49 resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
50 }
51 } catch (Exception e) {
52 e.printStackTrace();
53 } finally {
54 try {
55 if (response != null) {
56 response.close();
57 }
58 httpclient.close();
59 } catch (IOException e) {
60 e.printStackTrace();
61 }
62 }
63 return resultString;
64 }
65
66 public static String doGet(String url) {
67 return doGet(url, null);
68 }
69
70 public static String doPost(String url, Map<String, String> param) {
71 // 创建Httpclient对象
72 CloseableHttpClient httpClient = HttpClients.createDefault();
73 CloseableHttpResponse response = null;
74 String resultString = "";
75 try {
76 // 创建Http Post请求
77 HttpPost httpPost = new HttpPost(url);
78 // 创建参数列表
79 if (param != null) {
80 List<NameValuePair> paramList = new ArrayList<>();
81 for (String key : param.keySet()) {
82 paramList.add(new BasicNameValuePair(key, param.get(key)));
83 }
84 // 模拟表单
85 UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList,"utf-8");
86 httpPost.setEntity(entity);
87 }
88 // 执行http请求
89 response = httpClient.execute(httpPost);
90 resultString = EntityUtils.toString(response.getEntity(), "utf-8");
91 } catch (Exception e) {
92 e.printStackTrace();
93 } finally {
94 try {
95 response.close();
96 } catch (IOException e) {
97 // TODO Auto-generated catch block
98 e.printStackTrace();
99 }
100 }
101
102 return resultString;
103 }
104
105 public static String doPost(String url) {
106 return doPost(url, null);
107 }
108
109 public static String doPostJson(String url, String json) {
110 // 创建Httpclient对象
111 CloseableHttpClient httpClient = HttpClients.createDefault();
112 CloseableHttpResponse response = null;
113 String resultString = "";
114 try {
115 // 创建Http Post请求
116 HttpPost httpPost = new HttpPost(url);
117 // 创建请求内容
118 StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
119 httpPost.setEntity(entity);
120 // 执行http请求
121 response = httpClient.execute(httpPost);
122 resultString = EntityUtils.toString(response.getEntity(), "utf-8");
123 } catch (Exception e) {
124 e.printStackTrace();
125 } finally {
126 try {
127 response.close();
128 } catch (IOException e) {
129 // TODO Auto-generated catch block
130 e.printStackTrace();
131 }
132 }
133
134 return resultString;
135 }
136 }
