I am facing problem while using custom tags in jsp. Application is running well, but tag is not responding. My Code is:
我在jsp中使用自定义标签时遇到问题。应用程序运行良好,但标签没有响应。我的代码是:
this is my index.jsp and this is working. *index.jsp*
这是我的index.jsp,这是有效的。 * *的index.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib uri="/WEB-INF/MyTagLib" prefix="mtl"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
your code is:<mtl:MyTagClass input="GoodMorning" start="1" end="6"/>
</body>
</html>
this is Tag library *MyTagLib.tld*
这是Tag library * MyTagLib.tld *
<?xml version="1.0" encoding="UTF-8"?>
<taglib version="2.1" xmlns="http://java.sun.com/xml/ns/javaee" 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">
<tlib-version>1.0</tlib-version>
<short-name>mtl</short-name>
<uri>/WEB-INF/MyTagLib</uri>
<tag>
<name>MyTagClass</name>
<tag-class>MyPack.MyTagClass</tag-class>
<body-content>empty</body-content>
<attribute>
<name>input</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
<type>java.lang.String</type>
</attribute>
<attribute>
<name>start</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
<type>java.lang.String</type>
</attribute>
<attribute>
<name>end</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
<type>java.lang.String</type>
</attribute>
</tag>
</taglib>
following is tag handler *MyTagClass.java*
以下是标记处理程序* MyTagClass.java *
package MyPack;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.JspFragment;
import javax.servlet.jsp.tagext.SimpleTagSupport;
public class MyTagClass extends SimpleTagSupport {
private String input=null;
private String start=null;
private String end=null;
public MyTagClass(){}
@Override
public void doTag() throws JspException {
JspWriter out = getJspContext().getOut();
try {
JspFragment f = getJspBody();
if (f != null) {
f.invoke(out);
out.println("input.substring(start,end)");
}
} catch (java.io.IOException ex) {
throw new JspException("Error in MyTagClass tag", ex);
}
}
public void setInput(String input) {
this.input = input;
}
public void setStart(String start) {
this.start = start;
}
public void setEnd(String end) {
this.end = end;
}
}
n dis is web.xml *web.xml*
n dis是web.xml * web.xml *
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" 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-app_2_5.xsd">
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<jsp-config>
<taglib>
<taglib-uri>/WEB-INF/MyTagLib</taglib-uri>
<taglib-location>/WEB-INF/MyTagLib.tld</taglib-location>
</taglib>
</jsp-config>
</web-app>
please help
1 个解决方案
#1
0
i suggest to refer the following link better understanding for customer tag implementation process Demo
我建议参考以下链接更好地了解客户标签实施过程演示
#1
0
i suggest to refer the following link better understanding for customer tag implementation process Demo
我建议参考以下链接更好地了解客户标签实施过程演示