jsp自定义标签

来源：互联网发布：淘宝买的组装机怎么样编辑：程序博客网时间：2024/06/13 13:38

1.编写标签对应的实现类

package com.jiang.test;

import java.io.IOException;
import java.io.StringWriter;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.SimpleTagSupport;

public class TestTag extends SimpleTagSupport {

   /**
   * 标签中的属性
   */
   private String message;

   public void setMessage(String msg) {
       this.message = msg;
   }

   StringWriter sw = new StringWriter();

   public void doTag() throws JspException, IOException {
       System.out.println(message);
       sw.write("<h1>");
       getJspBody().invoke(sw);
       getJspContext().getOut().println(sw.toString());
   }
}

2.创建tld文件，文件放在web-inf下

<?xml version="1.0" encoding="UTF-8"?>

<taglib>
<tlib-version>1.0</tlib-version>
<jsp-version>2.0</jsp-version>
<short-name>Example TLD with Body</short-name>
<tag>
    <name>test</name>
    <tag-class>com.jiang.test.TestTag</tag-class>
    <body-content>scriptless</body-content>
    <attribute>
       <name>message</name>
    </attribute>
</tag>
</taglib>

3.jsp文件中使用标签

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