HI i have created one action, that contain one Document Object. I want to display those properties in jsp. i used to struts tag i am not able to get it , i am able to get string property of action , but not Object can you please help me... se my code below. i went all suport. i am not able to fix it. i am using tomcat7 .
public class SearchResultAction extends ActionSupport{
private static Logger log = Logger.getLogger(SearchResultAction.class);
private String name;
private DocumentData documentData;
public String execute() throws Exception {
documentData=new DocumentData();
documentData.setdocName("docName");
documentData.setdDocTitle("docTitle");
if (documentData!=null)
{
return SUCCESS;
}else{
return ERROR;
}
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public DocumentData getDocumentData() {
return documentData;
}
public void setDocumentData(DocumentData documentData) {
this.documentData = documentData;
}
}
My jsp code is:
<s:property value="documentData.docName" default="object is null"/>
My pojo class is:
public class DocumentData {
String docName;
String dDocTitle;
String dDocDate;
String dDocAuther;
// setters and getters for all property
}
Your docName setter doesn't follow JavaBean conventions; does your getter?
E.g., setdocName should be setDocName, the getter getDocName.
OGNL is going to call getDocName(), if the method doesn't exist, you won't get data.
Related
We have a Person class. Person class has a property with type PersonDetail. And PersonDetail has a property with type Mail class.
When we start the application and navigate to swagger ui html page, Mail class is not generated in components section of openapi definition and we get "Could not resolve reference: Could not resolve pointer: /components/schemas/Mail does not exist in document" error on page. As we checked if there is a complex type in the third level that time springdoc can not resolve that type.
Person and PersonDetail works fine but Mail fails.
Person->PersonDetail->Mail
public class Person {
private String name;
private PersonDetail personDetail;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public PersonDetail getPersonDetail() {
return personDetail;
}
public void setPersonDetail(PersonDetail personDetail) {
this.personDetail = personDetail;
}
}
public class PersonDetail {
private String surname;
private List<Mail> mails;
public List<Mail> getMails() {
return mails;
}
public void setMails(List<Mail> mails) {
this.mails = mails;
}
}
public class Mail {
private String mailAddress;
public String getMailAddress() {
return mailAddress;
}
public void setMailAddress(String mailAddress) {
this.mailAddress = mailAddress;
}
}
#get(path = "/getPersonTest")
#operation(description = "Testttt")
#ApiResponses(value = { #ApiResponse(responseCode = "200", description = "successful operation",
content = #content(schema = #Schema(implementation = Person.class)))})
public ResponseEntity getPerson(#RequestParam String name){
Person person = new Person();
return ResponseEntity.status(HttpStatus.OK).body(person);
}
There is no issue.
It seems that you are not using the right configuration.
We already answered you here: https://github.com/springdoc/springdoc-openapi/issues/679
This question already has answers here:
Conversion Error setting value for 'null Converter' - Why do I need a Converter in JSF?
(2 answers)
Closed 7 years ago.
Is a Converter necessary for a <h:selectOneMenu> or <p:selectOneMenu> with arbitrary user-created classes as its values? I mean, is the following code supposed to work without a converter?
<p:selectOneMenu value="#{bean.language}">
<f:selectItems value="#{bean.allLanguages}" />
</p:selectOneMenu>
and
#Named(value = "bean")
#ConversationScoped
public class Bean {
private Language language; // appropriate getter and setter are present
public List<SelectItem> getAllLanguages() {
// populates a list of select items with Strings as item labels and Languages as item values
}
}
I have a similar code with an enum as the type (Language) and it works perfectly. But when I replace the type with a normal java class, I get a conversion error.
You need a converter here, as JSF will assume strings by default, that is the way you coded it. JSF has no idea how to convert your pseudo entities to strings and vice versa.
Some notes:
1 . Your getAsString method defines your identifier for your entities/POJOs, not what the JSF (or whatever) select gets as itemLabel.
2 . Your converter can dig into the DB for real entities using this infamous article:
http://balusc.blogspot.de/2011/09/communication-in-jsf-20.html#ConvertingAndValidatingGETRequestParameters
You can also use CDI annotations with that "pattern".
3 . Your value = "bean"is redundant and the CDI scope of choice is usually #ViewScoped. However, you have to keep in mind that CDI #Named + JSF #ViewScoped isn't working together without using Seam 3 or Apache MyFaces CODI.
You do not need a converter, if you use this little class that I wrote :-) It can back selectOne and selecteMany components. It requires that your class's toString() provides a one-to-one unique representation of your object. If you like, you could substitute a method name other than toString(), like toIDString()
To use ListBacker in your ManagedBean, use ListBacker<Type> wherever you would have used List<Type>
#ManagedBean
#RequestScoped
public class BackingBean {
private ListBacker<User> users; // +getter +setter
#PostConstruct
public void init() {
// fill it up from your DAO
users = new ListBacker<User>(userDAO.find());
}
// Here's the payoff! When you want to use the selected object,
// it is just available to you, with no extra database hits:
User thisOneIsSelected = users.getSelectedItemAsObject();
// or for multi-select components:
List<User> theseAreSelected = users.getSelectedItemsAsObjects();
}
In your xhtml file:
<p:selectOneMenu value="#{backingBean.users.selectedItem}">
<f:selectItems value="#{backingBean.users.contents}" var="item" itemValue="#{item.value}" itemLabel="#{item.label}" />
</p:selectOneMenu>
The ListBacker class:
public class ListBacker<T extends AbstractEntityBase> {
// Contains the String representation of an Entity's ID (a.k.a.
// primary key) and the associated Entity object
Map<String, T> contents = new LinkedHashMap<String, T>(); // LinkedHashMap defaults to insertion-order iteration.
// These hold values (IDs), not labels (descriptions).
String selectedItem; // for SelectOne list
List<String> selectedItems; // for SelectMany list
public class ListItem {
private String value;
private String label;
public ListItem(String value, String label) {
this.value = value;
this.label = label;
}
public String getValue() {
return value;
}
public String getLabel() {
return label;
}
}
public ListBacker() {}
public ListBacker(List<T> lst) {
put(lst);
}
public void clear() {
contents.clear();
selectedItem = null;
if(selectedItems != null) {
selectedItems.clear();
}
}
public List<ListItem> getContents() {
return convert(contents);
}
public String getSelectedItem() {
return selectedItem;
}
public void setSelectedItem(String selectedItem) {
this.selectedItem = selectedItem;
}
public List<String> getSelectedItems() {
return selectedItems;
}
public void setSelectedItems(List<String> selectedItems) {
this.selectedItems = selectedItems;
}
public T getSelectedItemAsObject() {
return convert(selectedItem);
}
public List<T> getSelectedItemsAsObjects() {
return convert(selectedItems);
}
public void put(T newItem) {
contents.put(newItem.toString(), newItem);
}
public void put(List<T> newItems) {
for (T t : newItems) {
put(t);
}
}
// PROTECTED (UTILITY) METHODS
protected List<ListItem> convert(Map<String, T> maps) {
List<ListItem> lst = new ArrayList<ListItem>();
for (Entry<String, T> e : maps.entrySet()) {
lst.add(new ListItem(e.getKey(), e.getValue().desc()));
}
return lst;
}
protected List<T> convert(List<String> ids) {
List<T> lst = new ArrayList<T>();
for (String id : ids) {
lst.add(convert(id));
}
return lst;
}
protected T convert(String id) {
return contents.get(id);
}
}
I have two toString() implementations, one for JPA entities:
public abstract class AbstractEntityBase {
#Override
public final String toString() {
return String.format("%s[id=%s]", getClass().getSimpleName(), getIdForToString().toString());
}
/**
* Return the entity's ID, whether it is a field or an embedded ID class..
* #return ID Object
*/
protected abstract Object getIdForToString();
}
and one for JPA EmbeddedId's:
public abstract class CompositeKeyBase {
#Override
public final String toString() {
return String.format("%s[id=%s]", getClass().getSimpleName(), getIdForToString());
}
/**
* Supports the class's toString() method, which is required for ListBacker.
* Compile a string of all ID fields, with this format:
* fieldName=StringVALUE,field2=STRINGvAlUE2,...,fieldx=stringvalue <br />
* Recommended: start with Eclipse's "generate toString()" utility and move it to getIdForToString()
* #return a 1-to-1 String representation of the composite key
*/
public abstract String getIdForToString();
}
An example implementation of getIdForToString(), for an entity that has one Id field:
#Override
public Object getIdForToString() {
return userID;
}
An example implementation of getIdForToString(), for an EmbeddedId that has two fields:
#Override
public String getIdForToString() {
return "userID=" + userID + ",roleID=" + roleID;
}
This Question may be asked in several threads...but could not fine the correct answer
a Java Bean
package com.example;
public class Document {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
An ArrayList creation of JavaBean as displayed below
package com.example;
import java.util.ArrayList;
public class classdocs {
public ArrayList getData() {
ArrayList docsmx = new ArrayList();
Document d1 = new Document();
d1.setName("user.doc");
Document d2 = new Document();
d2.setName("office.doc");
Document d3 = new Document();
d3.setName("transactions.doc");
docsmx.add(d1);
docsmx.add(d2);
docsmx.add(d3);
return docsmx;
}
}
an Action Class
package com.example;
import java.util.ArrayList;
import com.opensymphony.xwork2.ActionSupport;
public class FetchAction extends ActionSupport {
private String username;
private String message;
private ArrayList docsmx = new ArrayList();
public ArrayList getDocuments() {
return docsmx;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String execute() {
classdocs cx = new classdocs();
if( username != null) {
docsmx = cx.getData();
return "success";
} else {
message="Unable to fetch";
return "failure";
}
}
}
Jsp with Struts2 Iterator Tag
Documents uploaded by the user are:</br>
<s:iterator value="docsmx">
<s:property value="name" /></br>
</s:iterator>
Question Why the ArrayList of Bucket containing JavaBean not displayed when Iterated ...
Am I doing some thing wrong ???
with regards
karthik
Depending your version, you should either provide a getter for docsmx (preferred, pre-S2.1.mumble), or make docsmx public (not as preferred, S2.1+).
Or, based on your code, use the correct getter:
<s:iterator value="documents">
<s:property value="name" /></br>
</s:iterator>
A couple of notes: documents should likely be declared a List, not ArrayList, although in this case it almost certainly doesn't matter. It's a good habit to get in to, though, coding to an interface when the implementation doesn't matter.
I'd also consider tightening up the code a little bit:
public String execute() {
if (username == null) {
message = "Unable to fetch";
return "failure";
}
docsmx = cs.getData();
return "success";
}
This allows a more natural reading, makes it more clear what the two states are (success and failure), keeps them very distinct, and slightly shorter.
For example, I have an URL: /test.action?a=1&b=2
Now I want in jsp page use to get only "a=1&b=2" out of the URL, how to do this?
Action Code
public class MyAction extends ActionSupport {
private String a;
private String a;
public String execute() throws Exception {
// do something here
return SUCCESS;
}
public String getA() {
return a;
}
public void setA(final String a) {
this.a= a;
}
public String getB() {
return b;
}
public void setB(final String b) {
this.a= a;
}
}
Using Struts tags:
<s:property value="a"/>
<s:property value="b"/>
Still i am not sure what exactly is your requirement as its not very clear from your question
Just a side note <s:url> This tag is used to create a URL
can i access ApplicationResource.properties file keys from Action Class in Struts 2
and update the values of the key ?
I don't think you can update the values of those keys directly, that would kind of defeat the purpose of it being (static) resources.
You can however use placeholders.
ApplicationResources.properties
property.key=Hi {0}, there's a problem with {1}
MyAction.java
public ActionForward execute(ActionMapping mapping,
ActionForm form,
javax.servlet.ServletRequest request,
javax.servlet.ServletResponse response)
throws java.lang.Exception {
MessageResources msgResource = getResources(request);
String msg = msgResource.getMessage("property.key", "Sankar", "updating values in the resources.");
}
Yes its possible.
Lets say if you have a property error.login in applicationResources.properties file.
eg : error.login= Invalid Username/Password. Please try again.
then in the Action class you can access it like this : getText("error.login")
Complete example:
applicationResources.properties
error.login= Invalid Username/Password
LoginAction.java
package net.sumitknath.struts2;
import com.opensymphony.xwork2.ActionSupport;
public class LoginAction extends ActionSupport {
private String username;
private String password;
public String execute() {
if (this.username.equals("admin") && this.password.equals("admin123")) {
return "success";
} else {
addActionError(getText("error.login"));
return "error";
}
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}