Java实现HttpGet请求传body参数

       <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.6</version>
        </dependency>

import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;
import java.net.URI;
/**
 * @author xf
 * @version 1.0.0
 * @ClassName HttpGetWithEntity
 * @Description TODO 定义一个带body的GET请求 继承 HttpEntityEnclosingRequestBase
 * @createTime 2020.11.18 13:51
 */
public class HttpGetWithEntity extends HttpEntityEnclosingRequestBase {
    private final static String METHOD_NAME = "GET";

​​​​​​​    @Override
    public String getMethod() {
        return METHOD_NAME;
    }
    public HttpGetWithEntity() {
        super();
    }
    public HttpGetWithEntity(final URI uri) {
        super();
        setURI(uri);
    }
    HttpGetWithEntity(final String uri) {
        super();
        setURI(URI.create(uri));
    }

}

    /**
     * 发送get请求，参数为json
     * @param url
     * @param param
     * @param encoding
     * @return
     * @throws Exception
     */
    public static String sendJsonByGetReq(String url, String param, String encoding) throws Exception {
        String body = "";
        //创建httpclient对象
        CloseableHttpClient client = HttpClients.createDefault();
        HttpGetWithEntity httpGetWithEntity = new HttpGetWithEntity(url);
        HttpEntity httpEntity = new StringEntity(param, ContentType.APPLICATION_JSON);
        httpGetWithEntity.setEntity(httpEntity);
        //执行请求操作，并拿到结果（同步阻塞）
        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, encoding);
        }
        //释放链接
        response.close();
        return body;
    }

    /**
     * 测试 Get 请求
     */
    @Test
    public void test(){
        String url = "http://127.0.0.1:8012/export/getByBodyJson";
        Map<String, Object> map = new HashMap<>();
        map.put("stuName","张一山");
        map.put("school","北京戏剧学院");
        String reqParams = JSONArray.toJSON(map).toString();
        try {
            String s = sendJsonByGetReq(url, reqParams, "UTF-8");
            System.out.println("请求Get请求返回结果："+s);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }