首先需要一个标签类
- 首先需要继承TagSupport
- 实现它其中的一个方法doStartTag()
public class MyTag extends TagSupport {
@Override
public int doStartTag() throws JspException {
JspWriter out = super.pageContext.getOut();
try {
out.print("<span>这个是自定义标签输出的内容</span>");
} catch (IOException e) {
e.printStackTrace();
}
return super.doStartTag();
}
书写tld文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE taglib
PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
"http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<taglib>
<tlib-version>2.0</tlib-version>
<jsp-version>1.2</jsp-version>
<short-name>myTag</short-name>
<uri>http://xujiangchen/myTag/</uri>
<display-name>Common Tag</display-name>
<description>Common Tag library</description>
<tag>
<name>out</name>
<tag-class>com.xu.crm.utils.MyTag</tag-class>
<body-content>JSP</body-content>
</tag>
</taglib>
页面
<%@ taglib prefix="myTag" uri="http://xujiangchen/myTag/"%>
<myTag:out></myTag:out>