http请求其他接口的utils

首先在pom中加入

关于http需要的jar包
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore -->
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpcore</artifactId>
    <version>4.4.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore -->
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.4.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore -->
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpmime</artifactId>
    <version>4.4.1</version>
</dependency>
json解析的jar包
<!-- https://mvnrepository.com/artifact/net.sf.json-lib/json-lib -->
<dependency>
    <groupId>net.sf.json-lib</groupId>
    <artifactId>json-lib</artifactId>
    <version>2.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.6</version>
</dependency>

因为http请求完成之后返回的数据是json数据，所以我们需要用json的jar包来解析数据，下面是java代码

/**.   
* @Description: TODO(调用接口获取数据)  
* @author xiehj  
* @date 2020年8月19日 下午3:20:05  
* @version V1.0  
*/

public class MpcStaffInfoUtil {

   //这里需要导入log的jar包
   private static final Logger log = Logger.getLogger(MpcStaffInfoUtil.class);
   /**
    * 发送post请求的方法
    */
   public static String pushPost(String code) {
    //这里是判断code参数是否为空的判断
    if(StringUtils.isNotBlank(code)) {
      log.info("调用根据code查询数据接口的方法。");
    } else {
      log.info("调用查询全量数据接口的方法。");
    }
       //CloseableHttpClient httpClient = HttpClients.createDefault();
       // 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
       CloseableHttpClient httpClient = HttpClientBuilder.create().build();
       //HttpClient httpClient = new DefaultHttpClient();
       //设置连接超时 connetionTimeout：指客户端和服务器建立连接的timeout，
       //setSocketTimeout 设置连接超时
       RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(60000)
               .setSocketTimeout(60000).setConnectTimeout(120000).build();
       //请求的url
       String url = null;
       //这里是根据code来判断到底该用配置文件里面的那个接口
       if (StringUtils.isNotBlank(code)) {
        //readParperties.getSftp这个方法地址 https://www.cnblogs.com/xhj-java/p/13536697.html
         url = readParperties.getSfpt("/mpcstaffinfo.properties", "TEST_URL_CODE");
         url = url + code;
       } else {
         url = readParperties.getSfpt("/mpcstaffinfo.properties", "TEST_URL");
       }
       log.info("请求的url：" + url);
       //String url = "http://127.0.0.1:8080/hrbase-web/httpRestInterface/listStaffInfo?StaffCode="+code;
       CloseableHttpResponse response = null;
       //HttpResponse response = null;
       try {
           //替换空格
           url= url.replaceAll(" ", "%20");
           //连接远程服务
           HttpPost httpPost = new HttpPost(url);
           httpPost.setConfig(requestConfig);
         /*  InputStreamEntity ise = new InputStreamEntity(is, -1L);
           httpPost.setEntity(ise);//设置传入流
         */           
           response = httpClient.execute(httpPost);
           HttpEntity responseEntity = response.getEntity();
           log.info("HTTP响应状态为:" + response.getStatusLine());
           if (responseEntity != null) {
               log.info("HTTP响应内容长度为:" + responseEntity.getContentLength());
               // 主动设置编码，来防止响应乱码
               String responseStr = EntityUtils.toString(responseEntity, StandardCharsets.UTF_8);
               //log.info("HTTP响应内容为:" + responseStr);
               return responseStr;
           }
       } catch (Exception e) {
           e.printStackTrace();
       }/*finally{
           try {
               // 释放资源
               if (httpClient != null) {
                   httpClient.close();
               }
               if (response != null) {
                   response.close();
               }
           } catch (IOException e) {
               e.printStackTrace();
           }
       }*/
       return null;
   }
  //StaffInfoEntity 是数据里面的实体类
  public static List<StaffInfoEntity> getMpc(String code) {
    String pushPost = MpcStaffInfoUtil.pushPost(code);
    List<StaffInfoEntity> staToMpc = null;
    JSONObject jsStr = JSONObject.fromObject(pushPost);
    //result 是返回的数据的名称 即 map.put("result",list);
    String string = jsStr.getString("result");
    /*try {
      String string = jsStr.getString("result");
    } catch (JSONException e) {
      System.out.println("取不到result的值！");
      return staToMpc;
    }*/
    if(StringUtils.isNotBlank(string)) {
      final Gson gson = new GsonBuilder().enableComplexMapKeySerialization().create();
      final List<StaffInfoEntity> res = gson.fromJson(string, new TypeToken<List<StaffInfoEntity>>() {
      }.getType());
      return staToMpc;
    }
    return staToMpc;
  }