在javascript中从java servlet读取数组 [英] Reading array from java servlet in javascript

问题描述

嗨喜欢标题说我试图从我的java Servlet中读取一个数组。我试图在我的java脚本文件中读取数组。

Hi like the title says I am trying to read an array from my java Servlet. I am trying to read the array in my java script file.

Java servlet代码：
String graphData [] = dbHandler.select（attributes）; //用数据库中的数据填充数组。
request.setAttribute（graphData，graphData）;

Java servlet code: String graphData[] = dbHandler.select(attributes); // filling the array with data from database. request.setAttribute("graphData", graphData);

RequestDispatcher dispatcher = request.getRequestDispatcher("/displayData.jsp");
dispatcher.forward(request, response);


    <script type="text/javascript">
      var graphData = ['${graphData}'];
      var graphData= pageContext.getAttribute("graphData");
      var graphData = document.getElementById("graphData");
      var GraphData = ['${graphData}'];
      log("test: " + graphData); 
   </script>

我尝试了所有这些选项，但都没有奏效。
有人可以告诉我从jsp页面中的java servlet读取数组的正确方法是什么？

I tried all those options but none of them worked. Can someone please tell me what the correct way is to read an array from a java servlet in a jsp page?

提前致谢！

编辑：

我能做的就是在JSP页面（在标题中）打印数组中的数据此代码：

what I can do is print out the data from the array on the JSP page (in the header) with this code:

  <c:forEach items="${graphData}" var="temp">
    <c:out value="${temp}"/><br />
  </c:forEach>

但我想在JS代码中使用数组中的数据。由于某种原因不起作用。

But I want to use the data from the array in my JS code. which for some reason doesn't work.

推荐答案

你可以这样使用

<script>
    var graphData = [
    <c:forEach items="${graphData}" var="graph">
        '<c:out value="${graph}" />',  
    </c:forEach>
    ];
    console.log(graphData);
</script>

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