HttpClient中DELETE请求，是没有办法带参数的。因为setEntity()方法是抽象类HttpEntityEnclosingRequestBase类里的方法，HttpPost继承了该类，而HttpDelete类继承的是HttpRequestBase类。下面是没有setEntity()方法的。
需要自己创建一个新类，然后照着HttpPost的抄一遍，让新类能够调用setEntity()方
法

自定义一个HttpDeleteWithBody类:

package com.connection.croller.delete;

import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;

import java.net.URI;

public 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();
    }
}

用HttpClient 调用 HttpDeleteWithBody的方法，就可以进行body的操作了

package com.connection.croller.delete;


import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import java.io.IOException;

/**
 * delete
 * 删除数据源
 * */

public class DeleteConnection {

    public static void main(String[] args)
    {
        DeleteConnection deleteConnection = new DeleteConnection();
        deleteConnection.doDelete();
    }

    public String doDelete()
    {
        CloseableHttpClient client = HttpClients.createDefault();
        HttpDelete delete = new HttpDelete("http://113.207.43.87:9090/api/servers/30");
        delete.setHeader("Content-Type","application/json");
        delete.setHeader("Authorization","eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJuYW1lIjoicm9vdCIsImV4cCI6MTYyODgxNjAzNCwidXNlcklkIjoxfQ.zso4mmbKE6deAmk4CpOlSDouEImLvqApm7irOArmKKE");
        try {
            CloseableHttpResponse response =  client.execute(delete);
            String result = EntityUtils.toString(response.getEntity(),"utf-8");
            System.out.println(result);
            return result;
        } catch (IOException e) {
            e.printStackTrace();
            return "没有获取到返回值";
        }finally {
            try {
                // 释放资源
                if (client != null) {
                    client.close();
                }
//                if (response != null) {
//                    response.close();
//                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    }

}