httpclient学习

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.2</version>
</dependency>

package com.mg.api.auto;

import java.io.IOException;

import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

/**
 * httpclient发送get请求
 * 
 * @author admin
 *
 */
public class GetDemo {
    public static void main(String[] args) throws ClientProtocolException, IOException {
        // 准备url
        String url = "https://tcc.taobao.com/cc/json/mobile_tel_segment.htm";

        // 准备测试数据
        String tel = "18581232148";
        url += ("?tel=" + tel); // 拼接url
        System.out.println(url);

        // 请求方式:get
        HttpGet get = new HttpGet(url);

        // 发送请求,获取响应
        HttpClient httpClient = HttpClients.createDefault();
        HttpResponse response = httpClient.execute(get);

        // 获取响应状态码
        int code = response.getStatusLine().getStatusCode();
        System.out.println(code);

        // 获取响应内容
        String result = EntityUtils.toString(response.getEntity());
        System.out.println(result);

        // 获取响应头信息
        Header[] headers = response.getAllHeaders();
        for (Header header : headers) {
            System.out.println(header);
        }
    }
}

package com.mg.api.auto;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

/**
 * httpclient发送post请求
 * 
 * @author admin
 *
 */
public class PostDemo {
    public static void main(String[] args) throws ClientProtocolException, IOException {
        // 接口地址
        String loginUrl = "http://49.235.92.12:9000/api/v1/login";

        // 接口请求方式:post
        HttpPost post = new HttpPost(loginUrl);

        // 接口测试数据
        String username = "test";
        String password = "123456";
        List<BasicNameValuePair> parameters = new ArrayList<BasicNameValuePair>();
        parameters.add(new BasicNameValuePair("username", username));
        parameters.add(new BasicNameValuePair("password", password));
        post.setEntity(new UrlEncodedFormEntity(parameters, "utf-8"));

        // 发送请求，获取响应
        HttpClient client = HttpClients.createDefault(); // 创建默认客户端，相当于按钮
        HttpResponse response = client.execute(post);

        // 状态码
        int code = response.getStatusLine().getStatusCode();
        System.out.println("状态码：" + code);

        // 响应报文
        String result = EntityUtils.toString(response.getEntity()); // json转为string
        System.out.println("响应报文：" + result);

        // 获取响应头信息
        Header[] headers = response.getAllHeaders();
        for (Header header : headers) {
            System.out.println("响应头信息：" + header);
        }
    }

}