You are missing the Getter for result2
.
You should also declare the variables private
.
You are also using the old FilterDispatcher: if you are using Struts2 > 2.1.3, remember to change it with the new filter, StrutsPrepareAndExecuteFilter.
문제
Why my output is not coming?
adder.java
package action;
public class adder {
int num1,num2,result2;
public String execute()
{
result2=num1+num2;
return "success";
}
public int getNum1() {
return num1;
}
public void setNum1(int num1) {
this.num1 = num1;
}
public int getNum2() {
return num2;
}
public void setNum2(int num2) {
this.num2 = num2;
}
}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<display-name>letsgo</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<filter>
<filter-name>f1</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>f1</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
index.jsp
<%@taglib uri="/struts-tags" prefix="s"%>
<s:form action="adder">
<s:textfield name="num1" label="firstnumber"/>
<s:textfield name="num2" label="secondnumber"/>
<s:submit value="add"/>
</s:form>
MyJsp.jsp
<%@taglib uri="/struts-tags" prefix="s"%>
<b>result is
<s:property value="result2"/>
</b>
<br/>
<jsp:include page="index.jsp"/>
struts.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="default" extends="struts-default">
<action name="adder" class="action.adder" >
<result name="success">/MyJsp.jsp</result>
</action>
</package>
</struts>
The output is result is
, but the value of result is not being displayed.
해결책
You are missing the Getter for result2
.
You should also declare the variables private
.
You are also using the old FilterDispatcher: if you are using Struts2 > 2.1.3, remember to change it with the new filter, StrutsPrepareAndExecuteFilter.
다른 팁
It's failing to bind to whatever port you're trying to use for the webserver. My guess is you forgot to shutdown an instance or it is hanging.