1分钟快速学会HttpClient

曾经终败给现在 2022-05-14 02:04 140阅读 0赞

HttpClient：顾名思义，基于Http协议的客户端，它的作用是模拟浏览器发送Http请求。

构建Client的第三方包有多种，这里我选择使用org.apache.commons包。

首先，配置依赖包

<dependency>
        <groupId>commons-httpclient</groupId>
        <artifactId>commons-httpclient</artifactId>
        <version>3.1</version>
    </dependency>

例子如下

import org.apache.commons.httpclient.HttpClient;
    import org.apache.commons.httpclient.HttpMethod;
    import org.apache.commons.httpclient.HttpStatus;
    import org.apache.commons.httpclient.methods.GetMethod;
    
    import java.io.IOException;
    
    public class HttpClientTest {
      public static void main(String[] args) {
        try {
          //创建HttpMethod，传入url
          HttpMethod getMethod = new GetMethod("http://localhost:8088/category-predict-api/behavior/baseCategory?size=1");
          //设置Header
          getMethod.setRequestHeader("Cookie", "userid=18;_uq=1");
          HttpClient client = new HttpClient();
          //执行请求
          client.executeMethod(getMethod);
          //处理response
          if (getMethod.getStatusCode() == HttpStatus.SC_OK) {
            String response = getMethod.getResponseBodyAsString();
            System.out.println(response);
          }else {
            System.out.println(getMethod.getStatusCode());
          }
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }

1分钟快速学会HttpClient

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