java和js构造http json请求，用于测试接口

java HttpClient方式

import com.alibaba.fastjson.JSONObject;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class ExportTest {
    public static void main(String[] args) throws IOException {
        Map<String, Object> params = new HashMap<>();
        params.put("townId", 1);
        params.put("hallOpertionType", "ALL");
        JSONObject json = new JSONObject(params);
        System.out.println(doPost("https://operationgwtest.bgycc.com/phantom-service-subscribe/subscribe/hall/exportexcel", json));
    }


    /**
     * post请求
     * @param url
     * @param json
     * @return
     */
    public static JSONObject doPost(String url, JSONObject json){

        CloseableHttpClient httpclient = HttpClientBuilder.create().build();
        HttpPost post = new HttpPost(url);
        JSONObject response = null;
        try {
            StringEntity s = new StringEntity(json.toString());
            s.setContentEncoding("UTF-8");
            s.setContentType("application/json");//发送json数据需要设置contentType
            post.setEntity(s);
            HttpResponse res = httpclient.execute(post);
            if(res.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
                String result = EntityUtils.toString(res.getEntity());// 返回json格式：
                response = JSONObject.parseObject(result);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        return response;
    }

}

js XMLHttpRequest方式 普通请求

var xhr = null;  
try {  
    xhr = new ActiveXObject("Msxml2.XMLHTTP");  
}  
catch (e) {  
    try {  
        xhr = new ActiveXObject("Microsoft.XMLHTTP");  
    }  
    catch (e1) {  
        xhr = new XMLHttpRequest();  
    }  
} 

xhr.open("post", "http://10.187.58.26:7012/phantom-service-subscribe/subscribe/hall/exportexcel", true);  
xhr.setRequestHeader("Content-Type", "application/json");
xhr.onreadystatechange = function() {  
    console.log(xhr.responseText);  
    if (xhr.readyState == 4 && xhr.status == 200) {  
        console.log(xhr.responseText);  
    }  
};  
var content = '{"townId":1,"hallOpertionType":"ALL"}';  
xhr.send(content); 

js XMLHttpRequest方式 文件下载

var xhh = new XMLHttpRequest();

xhh.open("post", "http://10.187.58.26:7012/phantom-service-subscribe/subscribe/hall/exportexcel");
xhh.setRequestHeader("Content-Type", "application/json");
xhh.responseType = 'blob';
    xhh.onreadystatechange = function () {
        if (xhh.readyState === 4 && xhh.status === 200) {

        var filename = "文件名.xls";
            var blob = new Blob([xhh.response], {type: 'text/xls'});
            var csvUrl = URL.createObjectURL(blob);
            var link = document.createElement('a');
            link.href = csvUrl;
            link.download = filename;
            link.click();

        }
    };
    var content = '{"townId":1,"hallOpertionType":"ALL"}';  
    xhh.send(content);