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I'm new to Struts 2. I'm creating a demo web application which allows a user to submit employee details on a jsp and show them on the next jsp. Following is the code:
struts.xml
<struts>
<constant name="struts.custom.i18n.resources" value="ApplicationResources" />
<!-- Configuration for the default package. -->
<package name="default" extends="struts-default" namespace="/">
<action name="empDetails" class="com.webapp.test.action.MyAction"
method="employeeDetails">
<result name="success">jsp/employeeDetails.jsp</result>
</action>
<action name="addEmployee" class="com.webapp.test.action.MyAction"
method="addEmployee">
<result name="success">jsp/addEmployee.jsp</result>
</action>
</package>
</struts>
Action class
public class MyAction extends ActionSupport{
private static final long serialVersionUID = 1L;
private Employee emp = null;
public String addEmployee(){
System.out.println("In addEmployee");
return SUCCESS;
}
public String employeeDetails(){
System.out.println("In employeeDetails");
System.out.println("Employee ID: "+emp.getEmployeeID());
return SUCCESS;
}
}
In the above action class, Employee is a separate model class with the following attributes:
String employeeID;
String name;
String department;
Following is my JSP page to add an employee:
<%@taglib uri="/struts-tags" prefix="s"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Add Employee</title>
</head>
<body>
<s:form action="empDetails">
<s:textfield name="emp.employeeID" label="Employee ID"></s:textfield>
<s:textfield name="emp.name" label="Name"></s:textfield>
<s:textfield name="emp.department" label="Department"></s:textfield>
<s:submit></s:submit>
</s:form>
</body>
</html>
After filling in the employee details when I click on the Submit button, I get a nullpointer exception in the employeeDetails() method:
java.lang.NullPointerException
com.webapp.test.action.MyAction.employeeDetails(MyAction.java:19)
and the server console displays the following exceptions:
ognl.OgnlException: target is null for setProperty(null, "department", [Ljava.lang.String;@acd4c9)
.....
ognl.OgnlException: target is null for setProperty(null, "employeeID", [Ljava.lang.String;@c5dd98)
....
ognl.OgnlException: target is null for setProperty(null, "name", [Ljava.lang.String;@5753b0)
Please explain what is the problem and how can I fill the employee model object from the JSP. I do not want to create getter setter methods in the Action class and also I do not want to use the ModelDriven interface.
594
The getter setter methods for the Employee object reference emp were missing in the MyAction class.
Problem resolved after creating the methods.
Thanks!!!
196
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