HttpDelete攜帶json參數（body）的方法

1.Httpclient 中常用的請求有2個，HttpPost 和 HttpGet，一般 HttpPost 對傳參 Json 的處理是:

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

2.但HttpDelete攜帶json參數時，不支持setEntity方法，原因是：

在HttpMethods中，包含HttpGet, HttpPost, HttpPut, HttpDelete等類來實現http的常用操作。其中，HttpPost繼承自HttpEntityEnclosingRequestBase，HttpEntityEnclosingRequestBase類又實現了HttpEntityEnclosingRequest接口，實現了setEntity的方法。 而HttpDelete繼承自HttpRequestBase，沒有實現setEntity的方法，因此無法設置HttpEntity對象。

解決方案：重寫一個自己的HttpDeleteWithBody類，繼承自HttpEntityEnclosingRequestBase，覆蓋其中的getMethod方法，從而返回DELETE。

//重寫
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(); }

}

使用時：

    /**
     * Http協議Delete請求 手環(第三方接口)
     *
     * @param url 請求url
     * @param json 參數對象json字符串
     * @param imei 手環串號(這兒業務需要設置到請求頭)
     * @param cpid 手環授權cpid(這兒業務需要設置到請求頭)
     * @param key 手環授權key(這兒業務需要設置到請求頭)
     * @return 數據
     * @throws Exception 異常信息
     */
    public static String httpDeleteForDeviceBracelets(String url, String json, String imei, String cpid, String key) throws Exception {
        //初始HttpClient
        CloseableHttpClient httpClient = HttpClients.createDefault();
        //創建Put對象
//        HttpDelete httpDelete = new HttpDelete(url);
        HttpDeleteWithBody httpDeleteWithBody = new HttpDeleteWithBody(url);
        //設置Content-Type
        httpDeleteWithBody.setHeader("Content-Type", "application/json");

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

        //寫入JSON數據參數
        httpDeleteWithBody.setEntity(new StringEntity(json));
        //發起請求，獲取response對象
        CloseableHttpResponse response = httpClient.execute(httpDeleteWithBody);
        //獲取請求碼
        //response.getStatusLine().getStatusCode();
        //獲取返回數據實體對象
        HttpEntity entity = response.getEntity();
        //轉為字符串
        return EntityUtils.toString(entity, "UTF-8");
    }

測試后成功!

參考自 : 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