JSP带有标签体的自定义标签


  1. 新建OutTag类


  2. 如何添加jsp-api.jar包


  3. OutTag类详细代码
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    package bid.zhazhapan.fims.tag;
    import javax.servlet.jsp.JspException;
    import javax.servlet.jsp.tagext.BodyTagSupport;
    public class OutTag extends BodyTagSupport {
    	private boolean out;// 判断是否输出标签体的属性
    	// 通过set方法获得页面out的属性值
    	public void setOut(boolean out) {
    		this.out = out;
    	}
    	// 覆盖doStartTag()方法
    	public int doStartTag() throws JspException {
    		if (out == true) {
    			return this.EVAL_BODY_INCLUDE;
    		} else {
    			return this.SKIP_BODY;
    		}
    	}
    }



  4. 如何配置xml

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    <!-- xml详细内容 -->
    <?xml version="1.0" encoding="UTF-8"?>
    <javaee:taglib version="2.1" xmlns:javaee="http://java.sun.com/xml/ns/javaee" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd ">
      <javaee:tlib-version>1.0</javaee:tlib-version>
      <javaee:short-name>demo</javaee:short-name>
      <javaee:uri>/demo</javaee:uri>
      <javaee:tag>
      	<javaee:name>output</javaee:name>
      	<javaee:tag-class>bid.zhazhapan.fims.tag.OutTag</javaee:tag-class>
      	<javaee:body-content>JSP</javaee:body-content>
      	<javaee:attribute>
      		<javaee:name>out</javaee:name>
      		<javaee:required>true</javaee:required
      		<javaee:rtexprvalue>true</javaee:rtexprvalue>
      	</javaee:attribute>
      </javaee:tag>
    </javaee:taglib>



  5. 新建test.jsp来测试标签
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    <!-- test.jsp详细代码 -->
    <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
        pageEncoding="ISO-8859-1"%>
    <%@ taglib uri="WEB-INF/tlds/mytag.tld" prefix="mytag" %>
    <!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=ISO-8859-1">
    <title>Insert title here</title>
    </head>
    <body>
    <mytag:output out="true">Hello everybody</mytag:output>
    </body>
    </html>
    <!-- 输出结果：Hello everybody -->




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tag:

    缺失模块。
    1、请确保node版本大于6.2
    2、在博客根目录（注意不是yilia根目录）执行以下命令：
    npm i hexo-generator-json-content --save

    3、在根目录_config.yml里添加配置： 

      jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: false
      raw: false
      content: false
      slug: false
      updated: false
      comments: false
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true

热爱编程，<br/>崇尚开源，<br/>喜欢折腾，<br/>Linux爱好者，<br/>追求编写极致优雅的代码。