java 如何使用 <c:out value=...> 标签库
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How to use <c:out value=...> taglib
提问by artaxerxe
I have the class A:
我有A类：
package a;
public class A {
private int x = 9;
public int getX() {
return x;
}
}
and the ajsp.jsp file:
和 ajsp.jsp 文件：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<!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=UTF-8">
</head>
<body>
<jsp:useBean id = "a" class = "a.A" />
<c:out value = "${a.x}" />
</body>
</html>
when i run it, it gives an error :
当我运行它时，它给出了一个错误：
- org.apache.jasper.JasperException: /ajsp.jsp(11,0) PWC6236: According to TLD or attribute directive in tag file, attribute value does not accept any expressions
- org.apache.jasper.JasperException：/ajsp.jsp(11,0) PWC6236：根据标记文件中的 TLD 或属性指令，属性值不接受任何表达式
if instead of <c:out value = "${a.x}" />i use <jsp:getProperty property="x" name="a"/>it goes perfect.
So, what is the problem?
Thank advance.
如果不是<c:out value = "${a.x}" />我使用<jsp:getProperty property="x" name="a"/>它就完美了。那么，问题是什么？先谢过。
回答by skaffman
Your taglib URI is incorrect, you're using the URI of the old pre-expression, pre-JSP 2.0 library.
您的 taglib URI 不正确，您使用的是旧的 pre-expression、pre-JSP 2.0 库的 URI。
Instead of
代替
it should be
它应该是
