SPRINGMVC Background Data Check

Step ①: Introducing Dependency

<!--data checksum        <dependency>            <groupId>org.hibernate</groupId>            <artifactid >hibernate-validator</artifactId>            <version>4.3.1.Final</version>        </dependency >        <!--validation api-->        <dependency>            <groupId>javax.validation</groupId>            <artifactId>validation-api</artifactId>            <version>1.0.0.GA</version>        </dependency>

　　

Step ②: Configure Spring.xml

<!--: Parameter Method name Resolver--   <bean id= "Methodnameresolver" class= " Org.springframework.web.servlet.view.InternalResourceViewResolver ">       <property name=" prefix "value="/"/ >       <property name= "suffix" value= ". jsp"/>   </bean>    <!--Scan all of the labeled classes under the package--    < Context:component-scan base-package= "Cn.happy.day15Validator"/>    <!--configuration Validator--    <bean id= " Myvalidator "class=" Org.springframework.validation.beanvalidation.LocalValidatorFactoryBean ">        < Property Name= "Providerclass" value= "Org.hibernate.validator.HibernateValidator"/>    </bean>    <!--binding Validator--    <mvc:annotation-driven validator= "Myvalidator"/>

　　

Step ③: Entity class annotations

Package Cn.happy.day15validator;import Org.hibernate.validator.constraints.notempty;import Javax.validation.constraints.max;import Javax.validation.constraints.min;import Javax.validation.constraints.pattern;import javax.validation.constraints.size;/** * Created by Administrator on 2018/ 3/31. */public class UserInfo {/** * min: Set minimum value * Max: Set maximum * message: Print info *//Specify Age between 18-120 @Min (valu    E = 18,message = "Age cannot be less than 18 years old") @Max (value = 120,message = "Age cannot be greater than 100 years old") private Integer-age; /** * Three ways to verify * @NotEmpty for collection * @NotNull for base type * @NotBlank for reference type * @Size set size *//non-empty test    Certificate @NotEmpty (message = "User name cannot be null") @Size (max = 20,min = 6,message = "User name cannot be greater than 20 characters or less than 6 characters") Private String name; /** * @Pattern REHEXP matches the regular */@NotEmpty (message = "Mailbox cannot be Empty") @Pattern (regexp = "^\\[email protected]\\w    +/.\\w+$ ", message =" Bad mailbox format ") Private String email;   @Pattern (regexp = "^1[35789]\\d{9}$", message = "Phone number format error") Private String phone;    Public String Getphone () {return phone;    } public void Setphone (String phone) {this.phone = phone;    } public String Getemail () {return email;    } public void Setemail (String email) {this.email = email;    } public Integer Getage () {return age;    public void Setage (Integer age) {this.age = age;    } public String GetName () {return name;    } public void SetName (String name) {this.name = name; }}

　　

Step ④: Configure the processor

Import Org.springframework.stereotype.controller;import Org.springframework.ui.model;import Org.springframework.validation.bindingresult;import Org.springframework.validation.fielderror;import Org.springframework.web.bind.annotation.requestmapping;import Javax.validation.valid;import Java.text.simpledateformat;import java.util.date;/** * Created by Administrator on 2018/3/30. */@Controllerpublic class Firstcontroller {@RequestMapping ("/first")/** * @Valid Validation Object * Bindingresult Binding Fixed results * Model View Object */Public String Dofirst (@Valid UserInfo UserInfo, Bindingresult BR, Model mv) throws Excep tion {//Determine number of errors in BR if (Br.geterrorcount () >0) {//prove at least one data error//Get information Fielderror name            = Br.getfielderror ("name");            Fielderror age = Br.getfielderror ("Age");            Fielderror phone = br.getfielderror ("Phone");            Fielderror email = br.getfielderror ("email");              Get error message if (name!=null) {  String namemsg = Name.getdefaultmessage ();            Return the error message to page Mv.addattribute ("Namemsg", namemsg);                } if (age!=null) {String agemsg = Age.getdefaultmessage ();            Mv.addattribute ("Agemsg", agemsg);                } if (phone!=null) {String phonemsg = Phone.getdefaultmessage ();            Mv.addattribute ("Phonemsg", phonemsg);                } if (email!=null) {String emailmsg = Email.getdefaultmessage ();            Mv.addattribute ("Emailmsg", emailmsg);        }//Return request View return "Validator";    } return "Dosecond"; }}

　　Configuration Complete!

SPRINGMVC Background Data Check