将Java变量从JSP提取到Script标记中
[英]Fetching Java variable from JSP into Script tag
问题描述
I am writing a JSP and have the Java code written in the <code> tags. 
我正在编写一个JSP，并在<code>标记中编写了Java代码。
I would like to use a Java variable which is inside the <code> tag, inside the script tag. 我想在<code>标记内，脚本标记内使用Java变量。
Example:- 例：-
<html>
<head>
var myJSVar = $(myJavaVariable)//Something like this and this doesn't work
</head>
<body>
<pre>
<code>
String myJavaVariable = "Sample String";
</code>
.....
Thanks!!!! 谢谢！！！！
3 个解决方案
解决方案1
1 2016-04-26 10:08:28
Its not possible to get java variable inside a script. 无法在脚本中获取java变量。 you can set the values in to a HTML element using java after you have done that you can use <script> tag to access the values which is in HTML element 您可以在使用<script>标记访问HTML元素中的值之后，使用java将值设置为HTML元素
<% String Name="myName"; %>
<input type="text" name="Name" id="Name" value="<%=Name%>" maxlength="50" />
using script tag to get the data in html element. 使用脚本标签获取html元素中的数据。
<script>
var name = document.getElementById('Name').value;
<script>
<code> is not a tag used in HTML to write java code. <code>不是HTML中用于编写Java代码的标记。 so you cant do any coding inside a code tag anything you will write in there will be just interpreted on browser in the format of a code. 因此，您不能在代码标签内进行任何编码，而要在其中写入的任何内容都只会在浏览器中以代码格式进行解释。
changed the answer according to your comments.example on getting values as a json and converting them to java objects 根据您的注释更改了答案。有关将值作为json并将其转换为Java对象的示例
String json = "{\"Name\":\"priyamal\",\"Mob\":\"077045\"}";
ObjectMapper mapperobject = new ObjectMapper();
Map<String, Object> javaobj = mapperobject.readValue(json, new TypeReference<Map<String,Object>>() { });
out.println("MyName:" + javaobj.get("Name") + "Mobile:" + javaobj.get("Mob"));
解决方案2
0 2016-04-26 10:26:31
First you have to declare , <% String myJavaVariable = "Sample String"; 首先，您必须声明<％String myJavaVariable =“ Sample String”; %> ％>
Then in script, var myJSVar = "<%=myJavaVariable%>"; 然后在脚本中，var myJSVar =“ <％= myJavaVariable％>”;
解决方案3
0 2016-04-26 10:31:05
There are two ways to use java variable on jsp 在jsp上使用java变量有两种方法
-
${message}
-
<%String myVar="blabla";%>
Hope this is useful for you. 希望这对您有用。
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