1、项目结构
2、实现自定义tag所需依赖
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
3、HelloTag.java
package com.tag; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.SimpleTagSupport; import java.io.IOException; /** * Created by Administrator on 2016/7/11. */ public class HelloTag extends SimpleTagSupport { @Override public void doTag() throws JspException, IOException { JspWriter out = getJspContext().getOut(); out.println("Hello Custom Tag!"); } }
4、costom.tld
<taglib>
<tlib-version>1.0</tlib-version>
<jsp-version>2.0</jsp-version>
<short-name>Example TLD</short-name>
<tag>
<name>Hello</name>
<tag-class>com.tag.HelloTag</tag-class>
<body-content>empty</body-content>
</tag>
</taglib>
5、index.jsp
<%@ taglib prefix="ex" uri="../WEB-INF/custom.tld"%>
<html>
<body>
<h2>Hello World!</h2>
<form action="test1" method="post" id="form1">
<input type="submit" name="submit" value="button">
</form>
<ex:Hello></ex:Hello>
</body>
</html>
注：这里需要引入标签库
<%@ taglib prefix="ex" uri="../WEB-INF/custom.tld"%>
6、结果
