HttpDelete携带json参数（body）的方法

1.Httpclient 中常用的请求有2个，HttpPost 和 HttpGet，一般 HttpPost 对传参 Json 的处理是:

HttpPost post = new HttpPost(url);
post.setEntity(new StringEntity(jsonString));

2.但HttpDelete携带json参数时，不支持setEntity方法，原因是：

在HttpMethods中，包含HttpGet, HttpPost, HttpPut, HttpDelete等类来实现http的常用操作。其中，HttpPost继承自HttpEntityEnclosingRequestBase，HttpEntityEnclosingRequestBase类又实现了HttpEntityEnclosingRequest接口，实现了setEntity的方法。 而HttpDelete继承自HttpRequestBase，没有实现setEntity的方法，因此无法设置HttpEntity对象。

解决方案：重写一个自己的HttpDeleteWithBody类，继承自HttpEntityEnclosingRequestBase，覆盖其中的getMethod方法，从而返回DELETE。

//重写
package com.dangjian.common.utils.http;

import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;
import java.net.URI;

class HttpDeleteWithBody extends HttpEntityEnclosingRequestBase {

    public static final String METHOD_NAME = "DELETE";
    @Override
    public String getMethod() { return METHOD_NAME; }

    public HttpDeleteWithBody(final String uri) {
        super();
        setURI(URI.create(uri));
    }
    public HttpDeleteWithBody(final URI uri) {
        super();
        setURI(uri);
    }
    public HttpDeleteWithBody() { super(); }

}

使用时：

    /**
     * Http协议Delete请求 手环(第三方接口)
     *
     * @param url 请求url
     * @param json 参数对象json字符串
     * @param imei 手环串号(这儿业务需要设置到请求头)
     * @param cpid 手环授权cpid(这儿业务需要设置到请求头)
     * @param key 手环授权key(这儿业务需要设置到请求头)
     * @return 数据
     * @throws Exception 异常信息
     */
    public static String httpDeleteForDeviceBracelets(String url, String json, String imei, String cpid, String key) throws Exception {
        //初始HttpClient
        CloseableHttpClient httpClient = HttpClients.createDefault();
        //创建Put对象
//        HttpDelete httpDelete = new HttpDelete(url);
        HttpDeleteWithBody httpDeleteWithBody = new HttpDeleteWithBody(url);
        //设置Content-Type
        httpDeleteWithBody.setHeader("Content-Type", "application/json");

        //设置其他Header
        httpDeleteWithBody.setHeader("cpid", cpid);
        httpDeleteWithBody.setHeader("key", key);
        httpDeleteWithBody.setHeader("imei", imei);

        //写入JSON数据参数
        httpDeleteWithBody.setEntity(new StringEntity(json));
        //发起请求，获取response对象
        CloseableHttpResponse response = httpClient.execute(httpDeleteWithBody);
        //获取请求码
        //response.getStatusLine().getStatusCode();
        //获取返回数据实体对象
        HttpEntity entity = response.getEntity();
        //转为字符串
        return EntityUtils.toString(entity, "UTF-8");
    }

测试后成功!

参考自 : https://blog.csdn.net/xinghen1993/article/details/103999978?utm_medium=distribute.pc_aggpage_search_result.none-task-blog-2_allsobaiduend~default-2-103999978.nonecase&utm_term=httpdelete%E4%BC%A0%E5%8F%82&spm=1000.2123.3001.4430