个人中心
gpt4 book ai didi

java - 我如何将 JsonArray 从 jsp 解析为 Javascript

转载 作者：行者123 更新时间：2023-11-30 03:42:19 37 4
gpt4 key购买 nike

这是我的代码:

显示.jsp:

    <%
    JSONArray jsonArray = new JSONArray();
    String location = request.getParameter("location");
    Class.forName(OracleDriver.class.getName().toString());
    Connection connection = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","ram","ram");
    PreparedStatement preparedStatement = connection.prepareStatement("select * from job where location = ?");
    preparedStatement.setString(1,location);
    ResultSet resultSet = preparedStatement.executeQuery();
    int index = 0;
    if(!resultSet.next()){
            jsonArray.add(0, new Job("NA","NA","NA","NA","NA"));
            out.println(jsonArray);
    }else{
        while(resultSet.next()){
            index ++;
            Job job = new Job(resultSet.getString("title"),resultSet.getString("location"),resultSet.getString("eligibility"),resultSet.getString("position"),resultSet.getString("pdate"));
            jsonArray.add(index, job);
        }
        out.println(jsonArray);
    }

%>

包含 Job 对象列表的 jsonArray，我如何在javascript中解析jsonArray

任何想法...

最佳答案

一个建议可能是将隐藏的 dom 元素附加到 JavaScript 变量，例如 p 或隐藏输入。

然后，将内部 html 设置为您的 json 数组

<p id="myJsonArray" style="display:none;"> <%= jsonArray %> </p>

最后，附加一些事件，以触发 javascript 函数来读取该元素的内部 html

...如果您希望自动执行，可能是一个定时间隔或其他内容来检查该元素是否发生更改.

老实说，我会忘记所有这些，只编写一个 Web 服务(使用 Jersey 或其他东西)，然后创建一个 ajax 调用来获取你想要的:)但是，这是我的意见。

如果您需要任何进一步的想法，请告诉我!

Here's some working code. I would still like to emphasise that this is likely not the best approach. Having this much code mixed within a html page is very hard to maintain, and is not readable. I found this linked to on another StackOverflow post. It's worth a read. https://netbeans.org/kb/docs/javaee/ecommerce/design.html#architecture
The StackOverflow post: JSF vs Facelets vs JSP

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>

<%@ page import="java.util.List,java.util.ArrayList,org.json.JSONArray,java.util.Arrays" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>test</title>
<!-- DataTables CSS -->
<link rel="stylesheet" type="text/css" href="//cdn.datatables.net/1.10.3/css/jquery.dataTables.css">

<!-- jQuery -->
<script type="text/javascript" charset="utf8" src="//code.jquery.com/jquery-1.10.2.min.js"></script>

<!-- DataTables -->
<script type="text/javascript" charset="utf8" src="//cdn.datatables.net/1.10.3/js/jquery.dataTables.js"></script>

<script>
$(function(){
    //If your data won't change, you could just draw the table immediately after the page loads.
    var testTable = $("#dynamicTable").DataTable({
        data : JSON.parse($("#hiddenJson").html())
    });

    //If you're going to be updating data dynamically, you might 
    $("#refresh").click(function(){
        var data = JSON.parse($("#hiddenJson").html());

        testTable.clear();
        var modifiedData;
        for(r in data) {
            modifiedData = data[r];
            modifiedData[0] += " dynamically added";
            modifiedData[1] += " dynamically added";
            modifiedData[2] += " dynamically added";
            testTable.row.add(modifiedData);        
        };              
        testTable.draw();
    });
});

</script>
</head>
<body>
<%

    JSONArray jsonArray = new JSONArray();
    String location = request.getParameter("location");
   //  Class.forName(OracleDriver.class.getName().toString());
   // Connection connection = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","ram","ram");
   // PreparedStatement preparedStatement = connection.prepareStatement("select * from job where location = ?");
   // preparedStatement.setString(1,location);
   // ResultSet resultSet = preparedStatement.executeQuery();
    //int index = 0;
    //if(!resultSet.next()){
    //        jsonArray.add(0, new Job("NA","NA","NA","NA","NA"));
    //        out.println(jsonArray);
    //}else{
    //    while(resultSet.next()){
    //        index ++;
    //        Job job = new Job(resultSet.getString("title"),resultSet.getString("location"),resultSet.getString("eligibility"),resultSet.getString("position"),resultSet.getString("pdate"));
    //        jsonArray.add(index, job);
    // }    
    jsonArray.put(0, ("NA,NA,NA").split(",")); 
    jsonArray.put(1, ("NA2,NA2,NA2").split(",")); 
    jsonArray.put(2, ("NA3,NA3,NA3").split(",")); 

%>

<p id="hiddenJson" style="display:none;"> <%= jsonArray.toString() %> </p>

<table id="dynamicTable">
  <thead>
    <th>column 1</th>
    <th>column 2</th>
    <th>column 3</th>
  </thead>
</table>

<button id="refresh"> Update Data </button>
</body>
</html>

关于java - 我如何将 JsonArray 从 jsp 解析为 Javascript，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26569907/

37 4 0
文章推荐： java - 使用 Twitter-hbc 在 Java 中读取推文 - IOException
文章推荐： java - 使用 JToggleButton 而不触发它。
文章推荐： java - 不断收到未声明的变量错误，我不明白从哪里来
文章推荐： c++ - TBB 并发 HashMap 模板参数
行者123
个人简介

我是一名优秀的程序员,十分优秀！

滴滴打车优惠券免费领取
滴滴打车优惠券
全站热门文章
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com