使用java发起http请求

package com.zqj.http_请求;

import org.apache.commons.io.IOUtils;

import javax.net.ssl.*;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

/**
 * @author zqj
 * @date 2021/4/29 9:42
 * @describe
 */
public class GetHttp {
    public void Get(String url) {
        
        DataOutputStream out = null;
        BufferedReader in = null;
        StringBuffer result = new StringBuffer();
        HttpsURLConnection connection = null;
        InputStream is = null;
        HostnameVerifier hv = new HostnameVerifier() {
            @Override
            public boolean verify(String hostname, SSLSession session) {
                return true;
            }
        };
        try {
            trustAllHttpsCertificates();//忽略SSL证书校验
        } catch (Exception e1) {
            e1.printStackTrace();
        }
        try {
            URL realUrl = new URL(url);//请求地址
            connection = (HttpsURLConnection) realUrl.openConnection();//开启连接

            connection.setHostnameVerifier(hv);
            connection.setDoOutput(true);
            connection.setDoInput(true);
            connection.setRequestMethod("POST");//请求方式 get post delete put
            //请求消息头
            connection.setRequestProperty("Accept", "application/json");
            connection.setRequestProperty("Content-Type", "application/json;charset=utf-8");

            connection.connect();//发送请求
            out = new DataOutputStream(connection.getOutputStream());//获取返回的流
//            out.writeBytes(jsonBody);//将内容写入
            out.flush();
            out.close();

            int status = connection.getResponseCode();//获取返回状态编码
            String responseMessage = connection.getResponseMessage();//http响应消息
            is = connection.getInputStream();//获取返回信息
            in = new BufferedReader(new InputStreamReader(is, "UTF-8"));
            String line = "";
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
        } catch (Exception e) {
            System.out.println(e);
        } finally {
            IOUtils.closeQuietly(out);
            IOUtils.closeQuietly(is);
            IOUtils.closeQuietly(in);
            if (null != connection) {
                IOUtils.close(connection);
            }
        }

    }

    /**
     * 忽略SSL证书校验
     *
     * @throws Exception
     */
    static void trustAllHttpsCertificates() throws Exception {
        TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {
            public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                return;
            }

            public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                return;
            }

            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }
        }};
        SSLContext sc = SSLContext.getInstance("SSL");
        sc.init(null, trustAllCerts, null);
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
    }
}