发送http的get请求参数放在body的json传参

对方接口是get请求，且参数放在body里面用json的方法传参，比较少见，卡了很久记录一下

1.导入依赖

        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.13</version>
        </dependency>

        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.4.16</version>
        </dependency>

2.工具类

package cn.leadingtv.config;

import org.apache.http.HttpEntity;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import java.net.URI;
import java.nio.charset.StandardCharsets;

public class GetHttpUtil {
    /**
     * GET请求使用BODY传JSON格式数据
     * @param url
     * @param token
     * @param json
     * @return
     */
    public static String get(String url,String token,String json)  {
        String body = "";
        try {
            //创建httpclient对象
            CloseableHttpClient client = HttpClients.createDefault();
            HttpGetWithEntity httpGetWithEntity = new HttpGetWithEntity(url);
            HttpEntity httpEntity = new StringEntity(json, ContentType.APPLICATION_JSON);
            httpGetWithEntity.setHeader("Authorization", token);
            httpGetWithEntity.setEntity(httpEntity);
            //执行请求操作，并拿到结果
            CloseableHttpResponse response = client.execute(httpGetWithEntity);
            //获取结果实体
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                //按指定编码转换结果实体为String类型
                body = EntityUtils.toString(entity, StandardCharsets.UTF_8);
            }
            //释放链接
            response.close();
        } catch (ClientProtocolException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

        return body;
    }
    static final class HttpGetWithEntity extends HttpEntityEnclosingRequestBase {
        private final static String METHOD_NAME = "GET";
        public HttpGetWithEntity() {
            super();
        }
        public HttpGetWithEntity(final URI uri) {
            super();
            setURI(uri);
        }
        HttpGetWithEntity(final String uri) {
            super();
            setURI(URI.create(uri));
        }
        @Override
        public String getMethod() {
            return METHOD_NAME;
        }
    }
}