Hi All,
After a couple of days I can't seem to figure this validation problem out. I
have a basic JSP form (create.jsp) with a textfield (with validation) and a
select list (WITHOUT validation). When I submit the form to trigger a
validation failure on purpose, the text field is validated correctly and the
user input is still present, however, the select list disappears below it
and the following error is given:
ERROR [[default]] Servlet.service() for servlet default threw exception
tag 'select', field 'list', name 'catID': The requested list key
'categories' could not be resolved as a collection/array/map/enumeration/it
erator type. Example: people or people.{name} - [unknown location]
I've read about similar problems and they say to initialize the collections
in the prepare(). I did that and I'm still getting the problem. Another
solution I've heard was to put the Collection in the session. This doesn't
seem like a scalable solution for applications that are deployed in a
session replicated enviornement like clustering. Please tell me that putting
the list in the seseion isn't the only work around?
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Action Code:
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public class CreateTicket extends ActionSupport implements Preparable {
private Map categories;
public Map getCategories() {
return categories;
}
public void setCategories(Map categories) {
this.categories = categories;
}
public String execute() throws Exception {
this.prepare();
return SUCCESS;
}
public void prepare() throws Exception {
categories = new HashMap();
categories.put(1, "test");
categories.put(2, "test2");
categories.put(3, "test3");
}
}
public class HelloWorld extends ActionSupport {
public static final String MESSAGE = "Struts is up and running ...";
private String name;
private Integer catID;
public Integer getCatID() {
return catID;
}
public void setCatID(Integer catID) {
this.catID = catID;
}
public String execute() throws Exception {
setMessage(MESSAGE + " " + getName());
return SUCCESS;
}
private String message;
public void setMessage(String message) {
this.message = message;
}
public String getMessage() {
return message;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
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/tutorial/create.jsp Code:
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<s:form action="HelloWorld">
<s:textfield name="name" label="Your name" size="50"/>
<s:select name="catID" label="Categories" list="categories"/>
<s:submit/>
</s:form>
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struts.xml Code:
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<struts>
<constant name="struts.action.extension" value="" />
<constant name="struts.devMode" value="true" />
<package name="default" extends="struts-default">
<action name="create" class="tutorial.CreateTicket">
<result>/ticket/create.jsp</result>
</action>
<action name="HelloWorld" class="tutorial.HelloWorld">
<result name="success">/ticket/createconfirm.jsp</result>
<result name="input">/ticket/create.jsp</result>
</action>
</package>
</struts>
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HelloWorld-validaiton.xml:
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<validators>
<validator type="stringlength">
<param name="fieldName">name</param>
<param name="minLength">10</param>
<param name="maxLength">10</param>
<param name="trim">true</param>
<message>Your name needs to be 10 characters long</message>
</validator>
</validators>
