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如何用spring-boot集成httpClient实现远程调用

发布时间:2020-06-04 18:51:14 来源:亿速云 阅读:533 作者:Leah 栏目:编程语言

  如何用spring-boot集成httpClient实现远程调用?这篇文章运用了实例代码展示,代码非常详细,可供感兴趣的小伙伴们参考借鉴,希望对大家有所帮助。

  引入相关依赖:

  org.apache.httpcomponents

  httpclient

  4.5.9

  com.alibaba

  fastjson

  1.2.47

  org.springframework.boot

  spring-boot-configuration-processor

  true

  创建HttpClientUtil工具类,代码如下:

  package com.test.demo;

  import com.alibaba.fastjson.JSON;

  import com.test.demo.model.User;

  import org.apache.http.HttpEntity;

  import org.apache.http.NameValuePair;

  import org.apache.http.ParseException;

  import org.apache.http.client.ClientProtocolException;

  import org.apache.http.client.config.RequestConfig;

  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.HttpClientBuilder;

  import org.apache.http.util.EntityUtils;

  import org.springframework.beans.factory.annotation.Autowired;

  import org.springframework.stereotype.Component;

  import java.io.IOException;

  import java.net.URI;

  import java.net.URISyntaxException;

  import java.util.List;

  /**

  * ClassName: HttpClientTest

  * Package: com.test.demo

  * Description: httpClient方法封装

  * Datetime: 2020/1/13 10:45

  * Author: zhoukaishun

  */

  @Component

  public class HttpClientUtil {

  @Autowired

  private HttpClientConfigure httpClientConfigure;

  /**

  * @description GET封装

  * @author zhoukaishun

  * @date 2020/1/13 13:12

  */

  public void doGetHttp(List params,Boolean haveParams) {

  // 获得Http客户端

  CloseableHttpClient httpClient = HttpClientBuilder.create().build();

  // 参数

  URI uri = null;

  try {

  // 设置uri信息,并将参数集合放入uri;

  if(haveParams){//有参调用

  uri = new URIBuilder().setScheme(httpClientConfigure.getScheme()).setHost(httpClientConfigure.getHost())

  .setPort(httpClientConfigure.getPort()).setPath(httpClientConfigure.getMapPath().get("interface2"))

  .setParameters(params).build();

  }else{//无参调用

  uri = new URIBuilder().setScheme(httpClientConfigure.getScheme()).setHost(httpClientConfigure.getHost())

  .setPort(httpClientConfigure.getPort()).setPath(httpClientConfigure.getMapPath().get("interface1"))

  .build();

  }

  } catch (URISyntaxException e1) {

  e1.printStackTrace();

  }

  // 创建Get请求

  HttpGet httpGet = new HttpGet(uri);

  // 响应模型

  CloseableHttpResponse response = null;

  try {

  // 配置信息

  RequestConfig requestConfig = RequestConfig.custom()

  // 设置连接超时时间(单位毫秒)

  .setConnectTimeout(5000)

  // 设置请求超时时间(单位毫秒)

  .setConnectionRequestTimeout(5000)

  // socket读写超时时间(单位毫秒)

  .setSocketTimeout(5000)

  // 设置是否允许重定向(默认为true)

  .setRedirectsEnabled(true).build();

  // 将上面的配置信息 运用到这个Get请求里

  httpGet.setConfig(requestConfig);

  // 由客户端执行(发送)Get请求

  response = httpClient.execute(httpGet);

  // 从响应模型中获取响应实体

  HttpEntity responseEntity = response.getEntity();

  System.out.println("响应状态为:" + response.getStatusLine());

  if (responseEntity != null) {

  System.out.println("响应内容长度为:" + responseEntity.getContentLength());

  System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));

  }

  } catch (ClientProtocolException e) {

  e.printStackTrace();

  } catch (ParseException e) {

  e.printStackTrace();

  } catch (IOException e) {

  e.printStackTrace();

  } finally {

  try {

  // 释放资源

  if (httpClient != null) {

  httpClient.close();

  }

  if (response != null) {

  response.close();

  }

  } catch (IOException e) {

  e.printStackTrace();

  }

  }

  }

  /**

  * @description POST封装

  * @author zhoukaishun

  * @date 2020/1/13 14:01

  */

  public void doPostHttp(User user,Boolean haveParam) {

  // 获得Http客户端

  CloseableHttpClient httpClient = HttpClientBuilder.create().build();

  URI uri = null;

  try {

  // 设置uri信息,并将参数集合放入uri;

  uri = new URIBuilder().setScheme(httpClientConfigure.getScheme()).setHost(httpClientConfigure.getHost())

  .setPort(httpClientConfigure.getPort())

  .setPath(haveParam?httpClientConfigure.getMapPath().get("interface4"):httpClientConfigure.getMapPath().get("interface3"))

  .build();

  } catch (URISyntaxException e1) {

  e1.printStackTrace();

  }

  // 创建Post请求

  HttpPost httpPost = new HttpPost(uri);

  if(haveParam){

  //入参

  // 利用阿里的fastjson,将Object转换为json字符串;

  // (需要导入com.alibaba.fastjson.JSON包)

  String jsonString = JSON.toJSONString(user);

  StringEntity entity = new StringEntity(jsonString, "UTF-8");

  // post请求是将参数放在请求体里面传过去的;这里将entity放入post请求体中

  httpPost.setEntity(entity);

  httpPost.setHeader("Content-Type", "application/json;charset=utf8");

  }

  // 响应模型

  CloseableHttpResponse response = null;

  try {

  // 由客户端执行(发送)Post请求

  response = httpClient.execute(httpPost);

  // 从响应模型中获取响应实体

  HttpEntity responseEntity = response.getEntity();

  System.out.println("响应状态为:" + response.getStatusLine());

  if (responseEntity != null) {

  System.out.println("响应内容长度为:" + responseEntity.getContentLength());

  System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));

  }郑州妇科医院哪家好 https://yiyuan.120ask.com/zzfck/

  } catch (ClientProtocolException e) {

  e.printStackTrace();

  } catch (ParseException e) {

  e.printStackTrace();

  } catch (IOException e) {

  e.printStackTrace();

  } finally {

  try {

  // 释放资源

  if (httpClient != null) {

  httpClient.close();

  }

  if (response != null) {

  response.close();

  }

  } catch (IOException e) {

  e.printStackTrace();

  }

  }

  }

  }

  其中大部分代码基本不变,只有对url的拼接做了一些处理,可以看到我们注入了一个HttpClientConfigure实例,因为我们需要访问的路径情况有很多种,但是我们不可能每次都去改util下的url拼接代码,所以引入一个HttpClientConfigure,这是我自定义的一个类,用于存储我们拼接url可能遇到的情况。代码如下:

  package com.test.demo;

  import lombok.Data;

  import org.springframework.boot.context.properties.ConfigurationProperties;

  import org.springframework.stereotype.Component;

  import java.util.HashMap;

  import java.util.Map;

  /**

  * ClassName: HttpClientConfigure

  * Package: com.test.demo

  * Description: 接收配置信息

  * Datetime: 2020/1/13 14:41

  * Author: zhoukaishun

  */

  @Component

  @ConfigurationProperties(prefix="httpclientconfigure")

  @Data

  public class HttpClientConfigure {

  private Map mapPath = new HashMap<>();

  private String scheme;

  private String host;

  private Integer port;

  }

  其中的@ConfigurationProperties注解 前面提到过,在pom中,其中属性值配置在yml文件中,如下(具体内容根据自己的需求来定):

  到这里就可以开始测试了,可以在本地启动两个服务(一个服务也行),根据自己controller里面的访问路径配置httpclientconfigure,然后直接调用自己controller里方法即可。

  以我的demo为例,调用者controller代码如下:

  @GetMapping

  @RequestMapping("/doGetHaveNoParam")

  public void doGetHaveNoParam(){

  httpClientUtil.doGetHttp(null,false);

  }

  @GetMapping

  @RequestMapping("/doGetHaveParam")

  public void doGetHaveParam(){

  System.out.println("调用有参Get请求,当前时间:"+System.currentTimeMillis());

  List params = new ArrayList<>();

  params.add(new BasicNameValuePair("name", "&"));

  params.add(new BasicNameValuePair("age", "22"));

  httpClientUtil.doGetHttp(params,true);

  }

  @PostMapping

  @RequestMapping("/doPostHaveNoParam")

  public void doPostHaveNoParam(){

  httpClientUtil.doPostHttp(null,false);

  }

  @PostMapping

  @RequestMapping("/doPostHaveParam")

  public void doPostHaveParam(){

  httpClientUtil.doPostHttp(new User("name",11),true);

  }

  被调用者controller代码如下:

  @RequestMapping("/doGetHaveNoParam")

  public String doGetHaveNoParam(){

  return "doGetHaveNoParam successful";

  }

  @RequestMapping("/doGetHaveParam")

  public List doGetHaveParam(String name,Integer age){

  return getUserByAge(name,age);

  }

  @PostMapping

  @RequestMapping("/doPostHaveNoParam")

  public String doPostHaveNoParam(){

  return "doPostHaveNoParam successful";

  }

  @PostMapping

  @RequestMapping("/doPostHaveParam")

  public String doHttpPostParam(@RequestBody User user){

  return "do Post params:name="+user.getName()+",age="+user.getAge();

  使用postman测试如下:

  请求路径分别为:

  http://localhost:8081/user/doGetHaveNoParam

  http://localhost:8081/user/doGetHaveParam

  http://localhost:8081/user/doPostHaveNoParam

  http://localhost:8081/user/doPostHaveParam

  以上就是用spring-boot集成httpClient实现远程调用的方法,代码详细清楚,如果在日常工作遇到这个问题,希望你能通过这篇文章解决问题。如果想了解更多相关内容,欢迎关注亿速云行业资讯频道!


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