TestController.java
@RequestMapping(value="/Control2/{personId}")
public String TestMe(@PathVariable("personId") Long personIdVal)
{
System.out.println(personIdVal);
return "hello";
}
Input
http://localhost:8089/Test2/Control1/Control2/152
Output
152
For setting the Bean value in struts-config.xml we should use the form-beans tag.The form-beans tag might contain any number of bean property defined within form-bean as below.
Defining a Simple Bean Property
<form-beans> <form-bean name="userBean" type="org.apache.struts.action.DynaActionForm"> <form-property name="userName" initial="This is Bean Value" type="java.lang.String" /> </form-bean> </form-beans>
In the above code I am creating a userBean and setting its value is initialized to This is Bean Value.
Now in the action mapping part of the struts-config.xml I am going to map the above created bean to path as said below
<action-mappings> <action path="/showBeanValue" type="org.apache.struts.actions.ForwardAction" parameter="/showBeanValue.jsp"/> <action name="userBean" path="/Login" /> </action-mappings>
In the first line I am defining action path as showBeanValue and it is going to forward to page showBeanValue.jsp when some one access the showBeanValue.do in url.
In the second statement I am creating a dummy form since the the html form action should not be empty.
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>
<html:form action="/Login">
<bean:write name="userBean" property="userName"></bean:write>
<bean:write name="userBean" property="userAge"></bean:write>
</html:form>
com.opensymphony.xwork2.interceptor.ParametersInterceptor setParameters
ParametersInterceptor – [setParameters]: Unexpected Exception caught setting FIELDNAME on CLASSNAME
This exception occurs if you have missed getters and setters for your class variable.
Struts2 tag for checking empty bean
<s:if test="%{!nmap.isEmpty()}">
<thead>
<tr>
<td>Name</td>
<td>Age</td>
</tr>
</thead>
</s:if>
<tbody>
<s:iterator var="Person" value="value">
.
.
.
</s:iterator>
</tbody>
Running Iterator Through Bean Stored in Map List
public class Iterator extends ActionSupport
{
Map nmap = new HashMap<String, List<Person>>();
public String execute()
{
Person objPerson = new Person();
objPerson.userName = "Name1";
objPerson.age = 25;
List<Person> myList = new ArrayList<Person>();
myList.add(objPerson);
nmap.put("Mugil", myList);
objPerson.userName = "Name2";
objPerson.age = 26;
List<Person> myList2 = new ArrayList<Person>();
myList2.add(objPerson);
nmap.put("Mani", myList2);
objPerson.userName = "Name3";
objPerson.age = 27;
List<Person> myList3 = new ArrayList<Person>();
myList3.add(objPerson);
nmap.put("Vinu", myList3);
setNmap(nmap);
return SUCCESS;
}
public Map getNmap()
{
return nmap;
}
public void setNmap(Map nmap)
{
this.nmap = nmap;
}
}
Person Bean Code
class Person
{
String userName;
int age;
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
}
JSP Page Using Struts2 Tag
<table>
<s:iterator value="nmap">
<s:iterator var="Person" value="value">
<tr>
<td>
<s:property value="key" />
</td>
<td>
<s:property value="age" />
</td>
</tr>
</s:iterator>
</s:iterator>
</table>
Action Class Code
public class DropDown extends ActionSupport{
private List arrUserDetails = new ArrayList<Users>();
public DropDown()
{
Users objUsers = new Users();
objUsers.setUserId("101");
objUsers.setUserName("User1");
arrUserDetails.add(objUsers);
objUsers.setUserId("102");
objUsers.setUserName("User2");
arrUserDetails.add(objUsers);
objUsers.setUserId("103");
objUsers.setUserName("User3");
arrUserDetails.add(objUsers);
}
public String execute(){
return SUCCESS;
}
public List getArrUserDetails() {
return arrUserDetails;
}
public void setArrUserDetails(List arrUserDetails) {
this.arrUserDetails = arrUserDetails;
}
}
Users Bean Class
public class Users
{
private String userId;
private String userName;
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
}
JSP Page Struts2 Tag
<s:select label="Departments" list="departmentList" listKey="deptId" listValue="deptName" name="department"/>
This warning is generated since you have specified formName.action in action attribute of form.You get get rid of those by changing the action attribute to formName instead of formName.action
Reason for Error
<s:form action="Reports.action" method="post">
Change it To
<s:form action="Reports" method="post" namespace="/">