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This article will explain in detail what the parameters of the HttpUtil tool class are, and the content of the article is of high quality, so the editor will share it with you for reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

Caller tool class and test class, which supports URL and JSON to pass parameters at the same time

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 invokes the utility class * * @ author zkyong * @ date 2019-07-02 15:22:22 * @ version v0.1 * / public class HttpUtil {public static final String UTF_8 = "UTF-8" / * send post request * * @ param url URL address * @ param socketTimeout establish scoket connection timeout * @ param connectTimeout establish data transfer connection timeout * @ param headers request header parameter * @ param params request parameter * @ param json request body (json) parameter * @ return String response message * @ throws Exception exception * / public static String sendPost (String url Int socketTimeout, int connectTimeout, Map headers, Map params, String json) throws Exception {/ / URL processing: request parameters are spliced into URL and passed 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);}} / / build request: HttpPost HttpPost post = new HttpPost (url); RequestConfig config = RequestConfig.custom () .setSocketTimeout (socketTimeout) .setConnectTimeout (connectTimeout) .setConnectionRequestTimeout (connectTimeout) .build () Post.setConfig (config); / / set request header: Header if (null! = headers & & headers.size ()! = 0) {for (Map.Entry entry: headers.entrySet ()) {post.addHeader (entry.getKey (), entry.getValue () }} / / set the request body: HttpEntity if (null! = json & &! ".equals (json.trim () {post.setEntity (new StringEntity (json, ContentType.APPLICATION_JSON));} / / call and return the result 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 call tool test class * * @ 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);}}

Callee:

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 layer * * @ author zkyong * @ date 2019-07-02 15:26:21 * @ version v0.1 * / @ RestControllerpublic 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 request class * * @ 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 + "]" }} on the parameters of the HttpUtil tool class is shared here, I hope that the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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