form:radiobutton and enum

[CowinR]

I have a command class with a property that is an enum type, I'm trying to present the property on a JSP form as a set of radio buttons:

Enum:

public enum PurchaseRate {
    Bid, Offer
}

Command:

...
private PurchaseRate purchaseRate;
...

JSP:

Bid: <form:radiobutton path="purchaseRate" value="Bid"/> <br/>
Offer: <form:radiobutton path="purchaseRate" value="Offer"/> <br/>

No matter what the value of the purchaseRate property, no radio button is ever selected.

[tinny]

Has anyone found a solution to this problem?

Im wanting to do the same thing.

Perhaps you can use an enum as the value?
E.g.

<form:radiobutton path="purchaseRate" value="PurchaseRate.Offer"/>

I would really be happy to find a solution to this problem.

Maybe someone could explain how to bind enum types to jsp?

Thanks

[marvinsouza]

My Enum:

public class enum MyEnum {
   ABC("XYZ"),
   DEF ("KW");
   private String description;
   public MyEnum(description) { this.description = description;}
   public String getDescription() { return description;}
}

Command:

public class Command {
 private MyEnum myPath;
 // getters and setters
}

Controller.referenceData():

 map.put("enums", MyEnum.values());

JSP:

<c:forEach var="enum" items="${enums}">
 <form:radiobutton path="myPath" value="${enum}"/>${enum.description}
</c:forEach>

Generated HTML:

 <input type="radio" name="myPath" value="ABC">XYZ
 <input type="radio" name="myPath" value="DEF">KW

You do NOT need register a Custom Editor ! The conversion occurs automagically

When you post the form, the spring will look for a enum with the name of "myPath" parameter value and configure the object in the command.

[CowinR]

Yes, thanks for the reply, but I think you missed the point of the original posting - none of the radio buttons are selected when the command class already contains a value for the enumeration property!

[marvinsouza]

For me, works.

Controller:

 formBackingObject(...) {
  final Command cmd = new Command();
  cmd.setMyPath(MyEnum.ABC);
  return cmd;
}

HTML:

<input type="radio" name="myPath" value="ABC" checked>XYZ
<input type="radio" name="myPath" value="DEF">KW

Remember that the radio value must have the same Enum name.

[CowinR]

Thanks for the reply, but just hard-coding a 'checked' attribute in the HTML is no good when editing an entity that may have any of the enumeration's values.

[marvinsouza]

CowinR, I did not make the manual check the radio button.
The html posted is the generated when the page called. I just make this example for show to you that works !

Here, for my applications, we use enums and radio buttons and works perfectly.

[bmargula]

Naming the values exactly as the ENUM names worked perfectly for me.

Thanks for the tip!