JSP和Jquery中的美元大括号问题

Question

In JSP, I notice that I can't render ${} into HTML. After the page is rendered, the HTML page will not show ${} anymore. In my understanding, ${} is part of java syntax.

Is there any approach to render this into HTML? Currently, I use print "${}" as a string so I can render this on my HTML. I need this symbol to be rendered as it is so later I can grab this symbol using jquery. (FYI: I'm using jquery template)

Thanks in advance

Answer 1

\${this is not an EL expression}

Escape the expression with \\ if it appears in a JSP template.

From the JSP EL 2.2 specification :

To generate literal values that include the character sequence ${ or #{ , the developer can choose to use a composite expression as shown here:

 ${'${'}exprA} #{'#{'}exprB} 

The resulting values would then be the strings ${exprA} and #{exprB} .

Alternatively, the escape characters \\$ and \\# can be used to escape what would otherwise be treated as an eval-expression. Given the literal-expressions:

 \\${exprA} \\#{exprB} 

Answer 2

You can use \\${expression}. If you are not using EL in that JSP page. then you can use
<%@ page isELIgnored ="true" %>.

I would recommend you to use \\${expression} and use the EL in other part of JSP. EL is very powerful and very helpful.

~Rajiv

Answer 3

将此行放在JSP的顶部。

<%@ page isELIgnored ="true" %>