引入的包为：
|
1
2
3
4
5
6
|
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient --><dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.8</version></dependency> |
实现的工具类为：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
import com.alibaba.fastjson.JSON;import org.apache.http.NameValuePair;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.slf4j.Logger;import org.slf4j.LoggerFactory;import java.io.IOException;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class HttpClientHelper { private HttpClientHelper() { } /** * 发起POST请求 * * @param url url * @param paramMap 参数的Map格式 */ public static void sendPost(String url, Map<String, String> paramMap) { logger.info("开始发起POST请求，请求地址为{}，参数为{}", url, JSON.toJSON(paramMap)); CloseableHttpResponse response = null; try (CloseableHttpClient httpClient = HttpClients.createDefault()) { String encoding = "utf-8"; //创建post请求对象 HttpPost httpPost = new HttpPost(url); //装填请求参数 List<NameValuePair> list = new ArrayList<>(); for (Map.Entry<String, String> entry : paramMap.entrySet()) { list.add(new BasicNameValuePair(entry.getKey(), entry.getValue())); } //设置参数到请求对象中 httpPost.setEntity(new UrlEncodedFormEntity(list, encoding)); httpPost.setHeader("Content-type", "application/x-www-form-urlencoded"); httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)"); response = httpClient.execute(httpPost); } catch (IOException e) { logger.error("POST请求发出失败，请求的地址为{}，参数为{}，错误信息为{}", url, JSON.toJSON(paramMap), e.getMessage(), e); } finally { try { if (response != null) { response.close(); } } catch (IOException e) { logger.error("POST请求response关闭异常，错误信息为{}", e.getMessage(), e); } } } /** * 发起GET请求 * * @param urlParam url请求，包含参数 */ public static void sendGet(String urlParam) { logger.info("开始发起GET请求，请求地址为{}", urlParam); HttpGet httpGet = new HttpGet(urlParam); CloseableHttpResponse response = null; try (CloseableHttpClient httpClient = HttpClients.createDefault()) { response = httpClient.execute(httpGet); int status = response.getStatusLine().getStatusCode(); logger.error("GET请求发出成功，请求的地址为{}，返回状态为{}", urlParam, status); } catch (IOException e) { logger.error("GET请求发出失败，请求的地址为{}，错误信息为{}", urlParam, e.getMessage(), e); } finally { try { if (response != null) { response.close(); } } catch (IOException e) { logger.error("GET请求response关闭异常，错误信息为{}", e.getMessage(), e); } } } public static void main(String[] args) { String url = "https://jiashubing.cn/tencenttest"; //需要传入的参数 Map<String, String> map = new HashMap<>(); map.put("code", "js"); map.put("day", "0"); map.put("city", "北京"); map.put("dfc", "1"); map.put("charset", "utf-8"); sendPost(url, map); String urlParam = "https://jiashubing.cn/talk/document?fileid=1234ji贾树丙"; sendGet(urlParam); }} |
如果POST请求想要发送Json 格式的数据，只需要修改成这样：
String json = JSON.toJSONString(paramMap);
StringEntity requestEntity = new StringEntity(json, "utf-8");
httpPost.setEntity(requestEntity);
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://www.cnblogs.com/acm-bingzi/p/httpcomponents.html
