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