org.apache.http 工具类使用

Maven 的 pom 引入：

<dependency>
	<groupId>org.apache.httpcomponents</groupId>
	<artifactId>httpclient</artifactId>
	<version>4.5.7</version>
</dependency>

依赖的 jar 文件:

GET 方法：

import org.apache.http.HttpEntity;
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.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public static String get(String url) throws Exception{
        HttpGet httpGet = new HttpGet(url);
        CloseableHttpResponse response2 = HttpClients.createDefault().execute(httpGet);

        try {

            response2.getStatusLine().getStatusCode();//HttpStatus.SC_OK

            HttpEntity entity2 = response2.getEntity();
            String response=EntityUtils.toString(entity2,"utf-8");//返回报文

            EntityUtils.consume(entity2);//关闭资源
            return response;
        } finally {
            response2.close();//关闭资源
        }
    }

POST 方法访问 http：

import org.apache.http.HttpEntity;
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.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public static String post(String url,String json) throws Exception{

        StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);//设置消息头 Content-Type application/json; charset=UTF-8
        HttpPost httpPost = new HttpPost(url);
        httpPost.setEntity(entity);
        CloseableHttpResponse response2 = HttpClients.createDefault().execute(httpPost);

        try {

            response2.getStatusLine().getStatusCode();//HttpStatus.SC_OK

            HttpEntity entity2 = response2.getEntity();
            String response=EntityUtils.toString(entity2,"utf-8");//返回报文

            EntityUtils.consume(entity2);//关闭资源
            return response;
        } finally {
            response2.close();//关闭资源
        }
    }

POST 方法访问 https：

去除 ssl 验证