HttpClient Get/Post方式调用第三方接口

package www.maxinhai.com.transfer.controller;

import com.alibaba.fastjson.JSON;
import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
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.client.utils.URIBuilder;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import www.maxinhai.com.transfer.domain.Note;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.time.LocalDateTime;

@RestController
@RequestMapping("/transfer")
public class TransferController {

    private final static Logger logger = LoggerFactory.getLogger(TransferController.class);

    /**
     * Get请求
     */
    @RequestMapping(value = "/transferByGet", method = RequestMethod.GET)
    public void transferByGet() {
        logger.info("transferByGet method start " + LocalDateTime.now());
        Note note = new Note();
        note.setNoteId(202003092044l);
        note.setTitle("创建日记");
        note.setContent("hello world");
        note.setType("test");
        note.setUser("maxinhai");
        note.setCreateTime(LocalDateTime.now());

        // 构造httpclient对象
        CloseableHttpClient httpclient = HttpClients.createDefault();
        //url地址
        URI uri = null;
        try {
            String jsonStr = JSON.toJSONString(note);
            uri = new URIBuilder("http://127.0.0.1:8529/note/addNote").setParameter("note", jsonStr).build();
        } catch (URISyntaxException e) {
            logger.info("transferByGet method error: " + e.getMessage());
        }
        HttpGet httpGet = new HttpGet(uri);
        httpGet.addHeader("Content-Type","application/json");
        httpGet.setHeader("Accept", "application/json");
        CloseableHttpResponse response = null;
        try {
            //执行Get请求
            response = httpclient.execute(httpGet);
            if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                HttpEntity httpEntity = response.getEntity();
                String respContent = EntityUtils.toString(httpEntity, "UTF-8");
                System.out.println("respContent: " + respContent);
            }
        } catch (IOException e) {
            logger.info("transferByGet method error: " + e.getMessage());
        } finally {
            try {
                if(response != null) {
                    response.close();
                }
                httpclient.close();
            } catch (IOException e) {
                logger.info("transferByGet method error: " + e.getMessage());
            }
            logger.info("transferByGet method end " + LocalDateTime.now());
        }
    }


    /**
     * Post请求
     */
    @RequestMapping(value = "/transferByPost", method = RequestMethod.GET)
    public void transferByPost() {
        logger.info("transferByPost method start " + LocalDateTime.now());
        Note note = new Note();
        note.setNoteId(202003091959l);
        note.setTitle("创建日记");
        note.setContent("hello world");
        note.setType("test");
        note.setUser("maxinhai");
        note.setCreateTime(LocalDateTime.now());

        // 构造httpclient对象
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost("http://127.0.0.1:8529/note/createNote");
        // 在传送复杂嵌套对象时，一定要把对象转成json字符串，我这里实用的是alibaba.fastjson，当然你也可以使用其他的json工具
        httpPost.addHeader("Content-Type","application/json");
        httpPost.setHeader("Accept", "application/json");
        //requestEntity.setContentEncoding("UTF-8");
        String jsonStr= JSON.toJSONString(note);
        StringEntity requestEntity=new StringEntity(jsonStr,"UTF-8");
        httpPost.setEntity(requestEntity);
        CloseableHttpResponse response = null;
        try {
            response = httpclient.execute(httpPost);
            if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                HttpEntity httpEntity = response.getEntity();
                String respContent = EntityUtils.toString(httpEntity, "UTF-8");
                System.out.println("respContent: " + respContent);
            }
        } catch (IOException e) {
            logger.info("transferByPost method error: " + e.getMessage());
        } finally {
            try {
                if(response != null) {
                    response.close();
                }
                httpclient.close();
            } catch (IOException e) {
                logger.info("transferByPost method error: " + e.getMessage());
            }
            logger.info("transferByPost method end " + LocalDateTime.now());
        }
    }

}

上面是HttpClient调用服务代码，端口8520

 

被调用接口，端口8529：

package www.maxinhai.com.note.controller;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.*;
import www.maxinhai.com.note.domain.Note;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@RestController
@RequestMapping(value = "/note")
public class NoteController {

    private final static Logger logger = LoggerFactory.getLogger(NoteController.class);

    /**
     *
     * @param note
     * @return
     * @desc 加上这个注解@RequestParam("note")  Required Note parameter 'note' is not present]
     */
    @RequestMapping(value = "/addNote", method = RequestMethod.GET)
    public Map<String, Object> addNote(@RequestBody Note note) {
        logger.info("addNote method start " + LocalDateTime.now());
        Map<String, Object> result = new HashMap<>();
        System.out.println(note.toString());
        result.put("code", 200);
        result.put("message", "getMethod success");
        result.put("data", null);
        logger.info("addNote method end " + LocalDateTime.now());
        return result;
    }


    /**
     *
     * @param note
     * @return
     * @desc 加上这个注解@RequestParam("note")  Required Note parameter 'note' is not present]
     */
    @RequestMapping(value = "/createNote", method = RequestMethod.POST)
    public Map<String, Object> createNote(@RequestBody Note note) {
        logger.info("createNote method start " + LocalDateTime.now());
        Map<String, Object> result = new HashMap<>();
        System.out.println(note.toString());
        result.put("code", 200);
        result.put("message", "postMethod success");
        result.put("data", null);
        logger.info("createNote method end " + LocalDateTime.now());
        return result;
    }

}

 

使用jar包：

　　　　 <!--HttpClient-->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.4.10</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.6</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.28</version>
        </dependency>

 

推荐阅读：https://www.cnblogs.com/zhanglijun/p/11598705.html