Spring_App_20_Data_Validation

package com.amit.beans;

public class User
{
private String uname;
private String updw;
private String user;
private String umobile;
private String uemail;

public String getUname()
{
return uname;
}
public void setUname(String uname)
{
this.uname = uname;
}
public String getUpdw()
{
return updw;
}
public void setUpdw(String updw)
{
this.updw = updw;
}
public String getUser()
{
return user;
}
public void setUser(String user)
{
this.user = user;
}
public String getUmobile()
{
return umobile;
}
public void setUmobile(String umobile)
{
this.umobile = umobile;
}
public String getUemail()
{
return uemail;
}
public void setUemail(String uemail)
{
this.uemail = uemail;
}

public void getUserDetails()
{
System.out.println("--------------USer Details------------");
System.out.println("User Name: "+uname);
System.out.println("User password: "+updw);
System.out.println("User UserName: "+user);
System.out.println("User Mobile: "+umobile);
System.out.println("User Email: "+uemail);

}

}

======================================================================

package com.amit.test;

import java.util.HashMap;

import java.util.List;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import org.springframework.validation.MapBindingResult;

import org.springframework.validation.ObjectError;

import com.amit.beans.User;

import com.amit.validators.UserValidator;

public class Test {

public static void main(String[] args) 

{

ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");

User user = (User) context.getBean("userbean");

user.getUserDetails();

 

UserValidator userValidator = (UserValidator) context.getBean("userValidatorBean");

HashMap<String,String> map = new HashMap<String,String>();

MapBindingResult results = new MapBindingResult(map,"com.amit.beans.User");

userValidator.validate(user, results);

List<ObjectError> list = results.getAllErrors();

for(ObjectError err : list)

{

System.out.println(err.getDefaultMessage());

}

} 

}

=====================================================================

package com.amit.validators;

import java.io.IOException;

import java.util.Properties;

import org.springframework.core.io.Resource;

import org.springframework.core.io.support.PropertiesLoaderUtils;

import org.springframework.validation.Errors;

import org.springframework.validation.Validator;

import com.amit.beans.User;

public class UserValidator implements Validator 

{

private Resource resource;  // to make available property file resorce here

public Resource getResource() {

return resource;

}

public void setResource(Resource resource) {

this.resource = resource;

}

@Override

public boolean supports(Class type) 

{

return User.class.equals(type);

}

@Override

public void validate(Object obj, Errors error) 

{

User user = (User)obj;

try 

{

Properties p = (Properties) PropertiesLoaderUtils.loadProperties(resource);

if(user.getUname() == null || user.getUname().equals(""))

{

  error.rejectValue("uname", "error.uname.required" , p.getProperty("error.uname.required"));

}

} 

catch (IOException e) 

{

e.printStackTrace();

}

}

}

======================================================================

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xmlns:context="http://www.springframework.org/schema/context"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context.xsd">

        

        <bean id= "userbean"  class = "com.amit.beans.User">

        <property name = "uname" value = ""></property>

        <property name = "updw" value = "pass@123"></property>

        <property name = "user" value = "manjhi"></property>

        <property name = "umobile" value = "8744973456"></property>

        <property name = "uemail" value = "amit@gmail.com"></property>

        </bean>

        

        <bean id="userValidatorBean" class = "com.amit.validators.UserValidator">

        <property name="resource" value="Messages.properties"></property>

        </bean>

        

</beans>        

================================Messages.properties========================

error.uname.required = UserName is Required