STRUTS2 validation of data 2 ways

Data validation for STRUTS2:

The checksum of the data is divided into two types: client Checksum server side.

Client-side checksum: The checksum completed by JS. (To improve the user experience. Reduce user input errors)

Server-side check: Check in the background. (Required.)

Manual encoding for verification:

1. Write an action that must inherit the Actionsupport.

2. Override the Validate method:---Validate against all methods in the action.

@Override

STRUTS2 provides a way to verify the data:

public void Validate () {

if (username = = NULL | | Username.trim (). Length () = = 0) {

Addfielderror ("username", "user name cannot be empty!");

}

if (password = = NULL | | Password.trim (). Length () = = 0) {

Addfielderror ("Password", "Password cannot be empty!");

}

}

What if you check for one of the methods in the action? Verify the Add method.

* Writing method Validateadd ();

use XML to configure the check mode:

1. Write an action inheritance Actionsupport

2. Provide a Get method for the corresponding attribute.---to get the value of the variable in the XML.

3. Create a-validation.xml file with the same name as the action class under the action package.

* such as the name of the XML: Registaction2-validation.xml

* Introduction of DTD:XWORK-CORE-2.3.7.JAR/XWORK-VALIDATOR-1.0.3.DTD

* Configuration in XML:

<validators>

<field name= "username" >

<field-validator type= "Requiredstring" >

<message> user name cannot be empty! (XML) </message>

</field-validator>

</field>

<field name= "Password" >

<field-validator type= "Requiredstring" >

<message> password cannot be empty! (XML) </message>

</field-validator>

</field>

</validators>

How do I validate a method with an XML checksum?

* Create a <action> name-validation.xml with the same name as the action class under the package where the action is located

<action name= "Regist2" class= "" method= "execute" >

The name of the XML created is:registaction2-regist2-validation.xml

<validators>

<field name= "Password" >

<field-validator type= "Stringlength" >

<param name= "MinLength" >6</param>

<param name= "MaxLength" >12</param>

<message> password must be between 6-12 bits! (XML) </message>

</field-validator>

</field>

</validators>

Comprehensive Exercises:

<validators>

<field name= "username" >

<field-validator type= "Requiredstring" >

<message> user name cannot be empty!</message>

</field-validator>

</field>

<!--check password--

<field name= "Password" >

<field-validator type= "Requiredstring" >

<message> password cannot be empty!</message>

</field-validator>

<field-validator type= "Stringlength" >

<param name= "MinLength" >6</param>

<param name= "MaxLength" >12</param>

<message> password needs to be between 6-12 bits </message>

</field-validator>

</field>

<!--check Confirm password--

<field name= "Repassword" >

<field-validator type= "Fieldexpression" >

<param name= "expression" ><! [Cdata[(Password==repassword)]]></param>

<message> two times password input inconsistency!</message>

</field-validator>

</field>

<!--check Age--

<field name= "Age" >

<field-validator type= "int" >

<param name= "min" >18</param>

<param name= "Max" >60</param>

<message> age must be between 18-60 </message>

</field-validator>

</field>

<!--Birthday--

<field name= "Birthday" >

<field-validator type= "Date" >

<param name= "min" >1954-01-01</param>

<param name= "Max" >1996-12-31</param>

<message> birthdays need to be between 54-96 years </message>

</field-validator>

</field>

<!--Check your mailbox--

<field name= "Email" >

<field-validator type= "Email" >

<message> mailbox format is incorrect </message>

</field-validator>

</field>

<!--Telephone--

<field name= "Phone" >

<field-validator type= "Regex" >

<param name= "expression" ><! [cdata[^18\d{9}$]]></param>

<message> cell phone number format is incorrect!</message>

</field-validator>

</field>

</validators>

STRUTS2 validation of data 2 ways