从jsp页面将“空”值接收到Struts 2中

Question

I have a jsp page and struts 2 Action class . When I submit the form in the jsp , I am getting null values into the action.

The JSP code looks like :

   <s:form id="user" name="user" action="initUserAdmin">

    <s:textfield name="userName"  cssClass="txtbox" size="30" />
    <div class="btn"><a href='<s:url action="searchUserAdmin"/>' 
    title="Search"    id="button" class="btn" ><span>Search</span></a></div>

   </s:form>

The struts.xml has this part

      <action name="*UserAdmin" method="{1}" class="com.mphasis.im.web.action.UserAction">
        <result name="init" type="tiles">user</result>
        <result name="search" type="tiles">user</result>
        <result name="reset" type="tiles">user</result>
        <result name="createNew" type="tiles">createNewUser</result>
    </action>

And the Action class has this :

        public class UserAction extends BaseAction
          {
            public String userName;

        public String getUserName()
        {
      return userName;
        }

        public void setUserName(String userName)
        {
      this.userName = userName;
        }

            public String search()
           {
            searchProcessed = true;

            System.out.println("******** inside search ******");

            System.out.println("username = "+ userName);

            return TilesConstants.SEARCH;
           }

And the output comes as below when I type a string in the text box in jsp page.

        ******** inside search ******
         username = null

What might be the problem ? Am I missing something ?

Answer 1

<a href='<s:url action="searchUserAdmin"/>' 
title="Search"    id="button" class="btn" >

It's just a href to the URL of action and with no parameter. Therefore, the 'userName' in the action is null.

Answer 2

<s:form id="user" name="user" action="initUserAdmin">

    <s:textfield name="userName"  cssClass="txtbox" size="30" />
    <div class="btn"><a href='javascript:submitme()' 
    title="Search"    id="button" class="btn" ><span>Search</span></a></div>

   </s:form>

Javascript

function submitme(){
document.user.submit()
}

Also in the action mapping you provided the action name you are using there is UserAdmin whereas in the form action you are using initUserAdmin .They must be the same