服务端post方式请求接口

代码需验证后进行修改才可使用，目前可使用此代码进行请求，根据问题进行修改。

import HttpStatus = org.apache.http.HttpStatus;//视情况删除
import org.apache.http.StatusLine;
import CloseableHttpResponse = org.apache.http.client.methods.CloseableHttpResponse;//视情况删除
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import CloseableHttpClient = org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
public class PostUrl{
    public String post_invoke(){
        //接口地址
        String url = "http://10.0.37.16:6080/srm/userloginservlet";
        String params = "{\"pageSize\":2000,\"currentPage\":1,\"roleId\": \"srm_accessWhiteList\",\"filterString\" :\"\"}";
        //模拟请求
        HttpClients httpClient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);
        try{
            //String 转换为JSON
            StringEntity paramsEntity = new StringEntity(params);
            httpPost.setHeader('Content-Type', 'application/json;charset=utf-8');
            httpPost.setEntity(paramsEntity);
            Object resultObject = httpClient.execute(httpPost);
            StatusLine status = res.getStatusLine();
            if (status.getStatusCode() == 200) {
                String result = EntityUtils.toString(result.getEntity(), 'utf-8');
            }else{
                println('接口请求失败：'+status);
            }
        }catch(Exception e){
            System.out.println(e);
        }
        return result;
    }
}