HttpUtil工具类的参数是什么
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调用方工具类及测试类，支持URL及JSON同时传递参数
package com.example.demo.util;
import org.apache.http.NameValuePair;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
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;
import org.apache.http.entity.ContentType;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
/**
* Http调用工具类
*
* @author zkyong
* @date 2019-07-02 15:22:22
* @version v0.1
*/
public class HttpUtil {
public static final String UTF_8 = "UTF-8";
/**
* 发送post请求
*
* @param url URL地址
* @param socketTimeout 建立scoket连接超时时间
* @param connectTimeout 建立数据传输连接超时时间
* @param headers 请求头参数
* @param params 请求参数
* @param json 请求体(json)参数
* @return String 响应报文
* @throws Exception 异常
*/
public static String sendPost(String url, int socketTimeout, int connectTimeout,
Map headers, Map params,
String json) throws Exception {
// URL处理: 请求参数拼接到URL中传递
if (null != params && params.size() != 0) {
List list = new ArrayList<>();
for (Entry entry : params.entrySet()) {
list.add(new BasicNameValuePair(entry.getKey(), String.valueOf(entry.getValue())));
}
String uri = EntityUtils.toString(new UrlEncodedFormEntity(list, UTF_8));
if (uri != null) {
url = url.contains("?") ? (url + "&" + uri) : (url + "?" + uri);
}
}
// 构建请求: HttpPost
HttpPost post = new HttpPost(url);
RequestConfig config = RequestConfig.custom()
.setSocketTimeout(socketTimeout)
.setConnectTimeout(connectTimeout)
.setConnectionRequestTimeout(connectTimeout)
.build();
post.setConfig(config);
// 设置请求头: Header
if (null != headers && headers.size() != 0) {
for (Map.Entry entry : headers.entrySet()) {
post.addHeader(entry.getKey(), entry.getValue());
}
}
// 设置请求体: HttpEntity
if (null != json && !"".equals(json.trim())) {
post.setEntity(new StringEntity(json, ContentType.APPLICATION_JSON));
}
// 调用并返回结果
CloseableHttpClient client = null;
CloseableHttpResponse response = null;
try {
client = HttpClients.createDefault();
response = client.execute(post);
return EntityUtils.toString(response.getEntity(), UTF_8);
} finally {
if (response != null) {
response.close();
}
if (client != null) {
client.close();
}
}
}
} package com.example.demo.util;
import java.util.HashMap;
import java.util.Map;
import org.junit.Test;
/**
* Http调用工具测试类
*
* @author zkyong
* @date 2019-07-02 15:23:10
* @version v0.1
*/
public class HttpUtilTest {
@Test
public void test01() throws Exception {
String url = "http://localhost:8080/hello";
String json = "{\"hello\":\"wellcome\", \"name\":\"zhangsan\"}";
int socketTimeout = 120 * 1000;
int connectTimeout = 120 * 1000;
Map params = new HashMap<>();
params.put("p1", "param01");
params.put("p2", "param02");
params.put("p3", "param03");
params.put("p4", "param04");
Map headers = new HashMap<>();
headers.put("Content-Type", "application/json");
String response = HttpUtil.sendPost(url, socketTimeout, connectTimeout, headers, params, json);
System.out.println("==================================================");
System.out.println(response);
}
} 被调用方：
package com.example.demo.web;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import com.example.demo.request.HelloDemoRequest;
/**
* HelloWorld Demo Web层
*
* @author zkyong
* @date 2019-07-02 15:26:21
* @version v0.1
*/
@RestController
public class HelloRestController {
@RequestMapping(value = "/hello", method = RequestMethod.POST)
public String hello(HttpServletRequest request,
HttpServletResponse response,
@RequestBody HelloDemoRequest body,
String p1, String p2,
String p3, String p4) {
System.out.println("enter the hello method!");
return body.getHello() + " " + body.getName() + ", params : p1=" + p1 + ",p2=" + p2 + ",p3=" + p3 + ",p4=" + p4;
}
}package com.example.demo.request;
/**
* HelloWorld Demo 请求类
*
* @author zkyong
* @date 2019-07-02 15:01:15
* @version v0.1
*/
public class HelloDemoRequest {
String hello;
String name;
public String getHello() {
return hello;
}
public void setHello(String hello) {
this.hello = hello;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return "HelloDemoRequest [hello=" + hello + ", name=" + name + "]";
}
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