用js函数触发Servlet

发布于 2025-01-02 05:00:15 字数 365 浏览 0 评论 0原文

servlet 查询数据库并将数据放入文件中。该数据文件必须每 10 秒刷新一次，以便用户查看更新的信息。

我需要使用 javascript 函数触发 servlet 的帮助。我成功在 JS 中获取 timeinterval 方法，但在调用 servlet 时遇到问题。

var int=self.setInterval("trigger()",10000); 

function(){ 

    //Servlet queries the db and loads the data into the file. 
    trigger servlet ...??? 

    " TriggerServlet? ...... 

}

原文

The servlet queries the database and throws data in to a file.
This data file has to be refreshed every 10 seconds for users to view the updated information.

I need help with triggering servlet with javascript function. I am successful in getting the timeinterval method in JS but I am having issue calling the servlet.

var int=self.setInterval("trigger()",10000); 

function(){ 

    //Servlet queries the db and loads the data into the file. 
    trigger servlet ...??? 

    " TriggerServlet? ...... 

}

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奢欲 2025-01-09 05:00:15

      var url = "servlet URL"; 
      var request = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP');
      request.open("GET",url,true);
      request.send(null);
      request.onreadystatechange = function() {
            if (request.readyState == 4) {
                if (request.status == 200) {
                    var response = request.responseText;
                    alert(response);
                }
        }
      };

      var url = "servlet URL"; 
      var request = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP');
      request.open("GET",url,true);
      request.send(null);
      request.onreadystatechange = function() {
            if (request.readyState == 4) {
                if (request.status == 200) {
                    var response = request.responseText;
                    alert(response);
                }
        }
      };

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