16.0 Java's Standard Bean Validation For Form - @Max @Min and Resource property file

Example of @Max and @Min validation (Download)

Below code helps to convert this big exception into a customize one .
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spring-mvc-demo-servlet.xml
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<!-- load custom message resources -->
<bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basenames" value="resources/messages"></property>
</bean>


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messages.properties
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typeMismatch.programmer.experience=invalid number

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Programmer.java
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package com.spring.demo.validation;

import java.util.LinkedHashMap;

import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

public class Programmer {
@NotNull
@Size(min=1,message="is required")
private String firstName;

@NotNull
@Size(min=1,message="is required")
private String lastName;

@NotNull(message="is required")
@Min(value=0,message="must be greater than or equal to zero")
@Max(value=10,message="must be less than or equal to 10")
private int experience;
private String[] editor;
private String time;
private String language;
LinkedHashMap<String, String> expertise=new LinkedHashMap<>();

public Programmer(){
expertise=new LinkedHashMap<>();
expertise.put("JAVA", "JAVA");
expertise.put("CPP", "CPP");
expertise.put("PYTHON", "PYTHON");
expertise.put("PHP", "PHP");
expertise.put("ASP", "ASP");
}

public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getTime() {
return time;
}
public void setTime(String time) {
this.time = time;
}

public LinkedHashMap<String, String> getExpertise() {
return expertise;
}

public String getLanguage() {
return language;
}

public void setLanguage(String language) {
this.language = language;
}

public String[] getEditor() {
return editor;
}

public void setEditor(String[] editor) {
this.editor = editor;
}

public int getExperience() {
return experience;
}

public void setExperience(int experience) {
this.experience = experience;
}


}

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ProgramController.java
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package com.spring.demo.validation;

import javax.validation.Valid;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.validation.BindingResult;

import org.springframework.web.bind.annotation.ModelAttribute;

import org.springframework.web.bind.annotation.RequestMapping;

@Controller

public class ProgramController {

@RequestMapping("/")

public String showHome(){

return "home";

}

@RequestMapping("/form")

public String showForm(Model model){

Programmer programmer=new Programmer();

model.addAttribute(programmer);

return "form";

}

@RequestMapping("/processForm")

public String processForm(@Valid @ModelAttribute("programmer") Programmer p,BindingResult br){

if(br.hasErrors())

{

System.out.println(br);

return "form";

}

else

{

return "output";

}

}

}

when you print br object you'll get the code in your console which you have to use in your messages.properties to manipulate the long exceptions.

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messages.properties
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typeMismatch.programmer.experience=invalid number

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home.jsp
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<html>

<head>

<title>HOME</title>

</head>

<body>

<h2>Welcome to Spring Validation Practice</h2>

<h3><a href="form">Click here to fill programmer's form</a></h3>

</body>

</html>

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form.jsp
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<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

<html>

<head>

<title>FORM</title>

<style type="text/css">

.error{color: red;}

</style>

</head>

<body>

<h2>Welcome to Spring Validation Practice</h2>

<form:form action="processForm" modelAttribute="programmer">

<table>

<tr>

<td></td>

<td>PROGRAMMER</td>

<td></td>

</tr>

<tr>

<td>First Name (*)</td>

<td><form:input path="firstName" /></td>

<td><form:errors path="firstName" cssClass="error" /></td>

</tr>

<tr>

<td>Last Name (*)</td>

<td><form:input path="lastName"/></td>

<td><form:errors path="lastName" cssClass="error" /></td>

</tr>

<tr>

<td>Which time is good for coding</td>

<td>

<form:radiobutton path="time" value="Day"/>Day

<form:radiobutton path="time" value="Night"/>Night

</td>

<td></td>

</tr>

<tr>

<td>What is your Expertise </td>

<td>

<form:select path="language">

<form:options  items="${programmer.expertise}" />

</form:select>

</td>

<td></td>

</tr>

<tr>

<td>Which is your Favourite Editor</td>

<td>

<form:checkbox path="editor" value="Notepad++"/>Notepad++

<form:checkbox path="editor" value="Edit++"/>Edit++

<form:checkbox path="editor" value="Sublime"/>Sublime

<form:checkbox path="editor" value="Comodo"/>Comodo

</td>

<td></td>

</tr>

<tr>

<td>Experience in coding (*)</td>

<td><form:input path="experience"/></td>

<td><form:errors path="experience" cssClass="error" /></td>

</tr>

<tr>

<td></td>

<td><input type="submit" value="SUBMIT"></td>

<td></td>

</tr>

</table>

</form:form>

</body>

</html>

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output.jsp
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<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<html>

<head>

<title>OUTPUT</title>

<style type="text/css">

.error{color: red;}

</style>

</head>

<body>

<h2>Welcome to Spring Validation Practice</h2>

<table border=1 style="width: 50%;border-collapse: collapse;">

<tr><td colspan="2" align="center">PROGRAMMER</td></tr>

<tr>

<td>First Name</td>

<td>${programmer.firstName}</td>

</tr>

<tr>

<td>Last Name</td>

<td>${programmer.lastName}</td>

</tr>

<tr>

<td>Which time is good for coding</td>

<td>${programmer.time}</td>

</tr>

<tr>

<td>What is your Expertise</td>

<td>${programmer.language}</td>

</tr>

<tr>

<td>Which is your Favourite Editor</td>

<td><c:forEach items="${programmer.editor}" var="temp">${temp} , </c:forEach></td>

</tr>

<tr>

<td>Experience in coding</td>

<td>${programmer.experience}</td>

</tr>

</table>

</body>

</html>

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spring-mvc-demo-servlet.xml
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<?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"

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

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

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

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

<!-- Step 3: Add support for component scanning -->

<context:component-scan base-package="com.spring.demo.validation" />

<!-- Step 4: Add support for conversion, formatting and validation support -->

<mvc:annotation-driven/>

<!-- Step 5: Define Spring MVC view resolver -->

<bean

class="org.springframework.web.servlet.view.InternalResourceViewResolver">

<property name="prefix" value="/WEB-INF/view/" />

<property name="suffix" value=".jsp" />

</bean>

<!-- load custom message resources -->

<bean id="messageSource"

class="org.springframework.context.support.ResourceBundleMessageSource">

<property name="basenames" value="resources/messages"></property>

</bean>

</beans>

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

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

xmlns="http://xmlns.jcp.org/xml/ns/javaee"

xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"

id="WebApp_ID" version="3.1">

<display-name>spring-mvc-demo</display-name>

<!-- Spring MVC Configs -->

<!-- Step 1: Configure Spring MVC Dispatcher Servlet -->

<servlet>

<servlet-name>dispatcher</servlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<init-param>

<param-name>contextConfigLocation</param-name>

<param-value>/WEB-INF/spring-mvc-demo-servlet.xml</param-value>

</init-param>

<load-on-startup>1</load-on-startup>

</servlet>

<!-- Step 2: Set up URL mapping for Spring MVC Dispatcher Servlet -->

<servlet-mapping>

<servlet-name>dispatcher</servlet-name>

<url-pattern>/</url-pattern>

</servlet-mapping>

</web-app>