从自定义JSP标记中包含另一个JSP页面可以通过以下步骤实现:
下面是一个示例:
<taglib xmlns="http://java.sun.com/xml/ns/j2ee" version="2.0">
<tlib-version>1.0</tlib-version>
<short-name>mytaglib</short-name>
<uri>http://example.com/mytaglib</uri>
<tag>
<name>includePage</name>
<tag-class>com.example.IncludePageTag</tag-class>
<body-content>empty</body-content>
</tag>
</taglib>
package com.example;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;
import java.io.IOException;
public class IncludePageTag extends TagSupport {
private String page;
public void setPage(String page) {
this.page = page;
}
@Override
public int doStartTag() throws JspException {
try {
JspWriter out = pageContext.getOut();
out.println("<jsp:include page=\"" + page + "\" />");
} catch (IOException e) {
throw new JspException(e);
}
return SKIP_BODY;
}
}
<%@ taglib prefix="mytag" uri="http://example.com/mytaglib" %>
<html>
<head>
<title>Include Page Example</title>
</head>
<body>
<h1>Include Page Example</h1>
<mytag:includePage page="included.jsp" />
</body>
</html>
在上述示例中,自定义标记库的URI为"http://example.com/mytaglib",自定义标记为<mytag:includePage>,并指定了包含的JSP页面为"included.jsp"。当访问index.jsp时,会将"included.jsp"的内容包含在当前页面中。
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