<c:out> Tag

JSP 标准标签库JSP Standard Tag Library

The <c:out> tag is used to display the result of an expression, similar to <%= %>, with the difference that the <c:out> tag can directly access properties via the "." operator.

For example, if you want to access customer.address.street, you only need to write: <c:out value="customer.address.street">.

The <c:out> tag automatically ignores XML markup characters, so they will not be treated as tags.

Syntax Format

<c:out value="<string>" default="<string>" escapeXml="<true|false>"/>

Attributes

The <c:out> tag has the following attributes:

Attribute Description Required? Default Value
value Content to output Yes None
default Default output value no Content in the body
escapeXml Whether to ignore XML special characters no true

Program Example

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<html>
<head>
<title>c:out 标签实例</title>
</head>
<body>
    <h1>&lt;c:out&gt; 实例</h1>
        <c:out value="&lt要显示的数据对象（未使用转义字符）&gt" escapeXml="true" default="默认值"></c:out><br/>
          <c:out value="&lt要显示的数据对象（使用转义字符）&gt" escapeXml="false" default="默认值"></c:out><br/>
    <c:out value="${null}" escapeXml="false">使用的表达式结果为null，则输出该默认值</c:out><br/>
</body>
</html>

The running result is as follows:

<c:out> 实例

&lt要显示的数据对象（未使用转义字符）&gt
<要显示的数据对象（使用转义字符）>
使用的表达式结果为null，则输出该默认值

JSP 标准标签库JSP Standard Tag Library

Other Extensions