java 发送get与post请求

依赖：

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.3.5</version>
</dependency>

代码：

import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
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.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import sun.net.www.http.HttpClient;

import javax.swing.text.html.parser.Entity;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class HttpRequestUtil {
    public static void main(String args[]){
        try {
            sendPostRequest("http://localhost:8090/auth/signIn");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 发送get请求
     * @param url
     * @throws IOException
     */
    public static  void  sendGetRequest(String url) throws IOException{
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpGet httpGet = new HttpGet(url);
        CloseableHttpResponse  closeableHttpResponse=httpClient.execute(httpGet);
        int statusCode = closeableHttpResponse.getStatusLine().getStatusCode();
        if(statusCode==200){
            HttpEntity entity = closeableHttpResponse.getEntity();
            System.out.println("请求成功");
            System.out.println(EntityUtils.toString(entity,"utf-8"));
        }
    }

    /**
     * 发送post请求
     * @param url
     * @throws IOException
     */
    public static  void  sendPostRequest(String url) throws IOException{
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        httpPost.setHeader("token", "644064"); //设置头部信息
        params.add(new BasicNameValuePair("username","000000"));   //设置参数
        params.add(new BasicNameValuePair("password","000000"));
        UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(params, "UTF-8");
        httpPost.setEntity(urlEncodedFormEntity);
        CloseableHttpResponse response = httpClient.execute(httpPost);
        int statusCode = response.getStatusLine().getStatusCode();
        if (statusCode == 200) {  //返回状态码，并打印返回信息
            HttpEntity entity = response.getEntity();
            String result = EntityUtils.toString(entity, "UTF-8");
            System.out.println("result:" + result);
        }
    }


}