Struts2-Learning Note Series (9)-OGNL type conversion and type binding

Html:

1 <s:form action= "Login" >2     <s:textfield name= "User.Name" label= "username" ></s: Textfield>3     <s:textfield name= "user.pwd" label= "password" ></s:textfield>4     <s:submit value= "Submit" ></s:submit>5 </s:form>67  

Attention:

The action class contains the user instance and has a get and set method. Framework uses set method and reflection to construct user instance

Collection type Binding

9.1. Bind Map

1 <s:form action= "Login" >2     <s:textfield name= "users[' one '].name" label= "User name" > </s:textfield>3     <s:textfield name= "users[' one '].pwd" label= "password" ></s:textfield> 4     <s:textfield name= "users[' two '].name" label= "username" ></s:textfield>5     <s:textfield name= " users['].pwd "label=" password "></s:textfield>6     <s:submit value=" Submit "></s:submit >7 </s:form>

9.2 Binding List

1 <s:form action= "Login" >2     <s:textfield name= "users[0].name" label= "username" ></s: Textfield>3     <s:textfield name= "users[0].pwd" label= "password" ></s:textfield>4     <s:textfield name= "users[1].name" label= "username" ></s:textfield>5     <s:textfield name= "Users[1].pwd" label= "password" ></s:textfield>6     <s:submit value= "Submit" ></s:submit >7 </s:form>

9.3 External mapping files

Defining a List Object

1 PrivateList users;2 3  PublicString Execute ()throwsException {4User user= (user) Getusers (). Get (0);5     if(User.getname (). Equals ("Zcx")){6Addactionmessage ("Conversion succeeded");7         returnSUCCESS;8     }9Addactionmessage ("Conversion failed");Ten     returnERROR; One } A  -  -  PublicList getusers () { the     returnusers; - } -  -  Public voidsetusers (List users) { +      This. Users =users; -}

External files:

Loginaction-conversion.properties

-conversion.properties: Fixed part

Loginaction: For the Action class name

Element_: Fixed part

Users: Member Names

For map type objects, you need to use the

Key_<mappropname>=<valuetype>

<mappropname>:map property names for type properties

Element_users=domain. User

Struts2-Learning Note Series (9)-OGNL type conversion and type binding