kratos2333
1/4/2017 - 8:25 PM

Validation (the implimentation is called hibernate validation)

Validation (the implimentation is called hibernate validation)

pom.xml
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    <dependency>
    	<groupId>org.hibernate</groupId>
    	<artifactId>hibernate-validator</artifactId>
    	<version>4.2.0.Final</version>
    </dependency>
addGoal.jsp
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<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>

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

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Add Goal</title>

<style>
.error {
	color: #ff0000;
}

.errorblock {
	color: #000;
	background-color: #ffEEEE;
	border: 3px solid #ff0000;
	padding: 8px;
	margin: 16px;
}
</style>

</head>
<body>

<form:form commandName="goal">
	<form:errors path="*" cssClass="errorblock" element="div" />  <!-- the * means disolay all errors -->
	<table>
		<tr>
			<td>Enter Minutes:</td>
			<td><form:input path="minutes" cssErrorClass="error" /></td>
			<td><form:errors path="minutes" cssClass="error" /></td>
		</tr>
		<tr>
			<td colspan="3">
				<input type="submit" value="Enter Goal Minutes"/>
			</td>
		</tr>
		
	</table>
</form:form>

</body>
</html>
GoalController.java
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package com.pluralsight.controller;

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;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.SessionAttributes;

import com.pluralsight.model.Goal;

@Controller
@SessionAttributes("goal")
public class GoalController {

	@RequestMapping(value = "addGoal", method = RequestMethod.GET)
	public String addGoal(Model model) {
		Goal goal = new Goal();
		goal.setMinutes(10);
		model.addAttribute("goal", goal);
		
		return "addGoal";
	}
	
	@RequestMapping(value = "addGoal", method = RequestMethod.POST)
	public String updateGoal(@Valid @ModelAttribute("goal") Goal goal, BindingResult result) {
		
		System.out.println("result has errors: " + result.hasErrors());
		
		System.out.println("Minutes updated: " + goal.getMinutes());
		
		if(result.hasErrors()) {
			return "addGoal";
		}
		
		return "redirect:addMinutes.html";
	}
	
}
Goal.java
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package com.pluralsight.model;

import org.hibernate.validator.constraints.Range;



public class Goal {

	@Range(min = 1, max = 120)
	private int minutes;

	public int getMinutes() {
		return minutes;
	}

	public void setMinutes(int minutes) {
		this.minutes = minutes;
	}
	
}