STRUTS2 Manual Verification

* First to get the value of the corresponding tag Name property from the page, declare the property with the same name in the action class action, provide the get and set methods

* to inherit the Actionsupport class or implement the Validateable interface
    
* Override the Validate () method of the Validateable interface
* The prerequisite is to ensure that the setusername (), validate (), login () methods are executed in this order

* If login fails, how to handle:
* THIS.ADDFIELDERROR (key, value);
* Key: Error prompt field
* Value: Error message

* When is verification passed?
* Verification by: 1, Map collection does not exist; 2, map set exists and is empty
* Validation does not pass: The Map collection exists and is not empty

* Analysis Requirements:
* User name cannot be null, ""
* The password cannot be null, "", and the length of the password is between 6-12

* Validate for all business methods or for a specific business method?
* Overridden Validate () method to validate against all business methods
*The overridden Validate () method, plus the specified business method name to validate (the first letter of the business method name), is implemented to validate against a specified business method
* Why do you want to do this stitching? Because the struts2 frame is spliced at the bottom, if you do not write it, the bottom will not find the corresponding method name

1 index.jsp2<s:fielderror></s:fielderror>3<s:form name="LoginForm" namespace="/validate"action="validateaction_login.action"Method="Post">4User name: <s:textfield name="username"/><br/>5Password: <s:password name="pwd"/><br/>6<s:submit value="Login"/>7</s:form>8<a href="${pagecontext.request.contextpath}/validate/validateaction_test.action">test</a>

1@SuppressWarnings ("Serial")2  Public classValidateactionextendsActionsupport {3     PrivateString username;4     PrivateString pwd;5      PublicString GetUserName () {6         returnusername;7     }8      Public voidSetusername (String username) {9          This. Username =username;Ten     } One      PublicString getpwd () { A         returnpwd; -     } -      Public voidsetpwd (String pwd) { the          This. PWD =pwd; -     } -     //Verify the Login service only, do not validate test, and if all is verified, write the method name validate () -      Public voidValidatelogin () { +         if(username==NULL|| Username.equals ("")) -         { +              This. Addfielderror ("Error", "User name cannot be empty");//key: Error flag; Value: Error prompt A         } at         if(pwd==NULL|| Pwd.equals ("")) -         { -              This. Addfielderror ("error", "Password cannot be empty"); -}Else { -String pattern= "^[0-9a-za-z]{6,12}$"; -Pattern p=Pattern.compile (Pattern); inMatcher m=P.matcher (PWD); -             Booleanb=m.matches (); to             if(!b) { +                  This. Addfielderror ("Error", "Bad password format"); -             } the         } *     } $     Panax Notoginseng      PublicString Login () { -System.err.println ("1234567890-"); the         return"Success"; +     } A      PublicString Test () { theSystem.err.println ("987654321"); +         return"Success"; -     } $}

STRUTS2 Manual Verification