如何在Struts2中默认取消选择单选按钮

Question

Can somebody please tell me how to set the default value of radio buttons blank and then get the value from client whatever user selects and accordingly update the table.

I am using following code snippet but seems to be something wrong in it :

        var blnValue4 = false;
        for (var i=0; i < document.forms[0].chkTeam.length; i++)
        {

            if (document.forms[0].chkTeam[i].checked)
              blnValue4 = document.forms[0].chkTeam[i].value;
               return blnValue4;

        }

        if(blnValue4 = false)
        {
            alert("Please answer question in  team participation.");
            document.getElementById("chkTeam").focus();
            return false;

        }

and then this is how i assign default values :

<td colspan =2>
:<html:radio  property="chkTeam" value=""  />Yes
<html:radio   property="chkTeam" value="" />No

                </td>

Note that in form it is set to accept Boolean as return type.

Answer 1

Please I can't understand your question, deselect or unselect. this one is make different, like unselected mean's not choose the value, deselected mean's particular person or part should disqualified. following codes are general for like ognl and list, As these are following as:

But, create a radio button via OGNL expression and preselect the “2″ as the default value.

<s:radio label="Answer" name="yourAnswer" list="#{'1':'Yes','2':'No'}"value="2"/>

It will generate the following HTML code…

<input type="radio" name="yourAnswer" id="resultAction_yourAnswer1" value="1"/>
<label for="resultAction_yourAnswer1">Yes</label> 

<input type="radio" name="yourAnswer" id="resultAction_yourAnswer2" 
checked="checked" value="2"/>
<label for="resultAction_yourAnswer2">No</label>

In Java code, create a List to return the values for the radio button.

List<String> genders = new ArrayList<String>();
        genders.add("male");
        genders.add("female");
        genders.add("unknown");
    public List<String> getGenders() {
        return genders;
    }
    public String getDefaultGenderValue(){
        return "unknown";
    }

In result page, tag, the list=”genders” will call the getGenders() method to return a list of the keys and values for the radio button. And the value=”defaultGenderValue” will call the getDefaultGenderValue() method to preselect the “unknown” value as a default value for the radio button.

<s:radio label="Gender" name="yourGender" list="genders" value="defaultGenderValue" />

It will generate the following HTML code…

<input type="radio" name="yourGender" id="resultAction_yourGendermale" value="male"/>
<label for="resultAction_yourGendermale">male</label> 

<input type="radio" name="yourGender" id="resultAction_yourGenderfemale" value="female"/>
<label for="resultAction_yourGenderfemale">female</label> 

<input type="radio" name="yourGender" id="resultAction_yourGenderunknown" 
   checked="checked" value="unknown"/>
<label for="resultAction_yourGenderunknown">unknown</label>