Simple Form on Spring Web MVC
September 10, 2010 Leave a comment
Create the bean first
package com.dyutiman.spring.formbean;
public class Person {
private String name;
private int age;
private String sex;
private String location;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
}
and a validator to validate this bean
package com.dyutiman.spring.validator;
public class PersonValidator implements Validator {
@Override
public boolean supports(Class<?> clazz) {
return clazz == Person.class;
}
@Override
public void validate(Object target, Errors errors) {
Person p = (Person) target;
ValidationUtils
.rejectIfEmpty(errors, "name", "nameEmpty", "enter name");
if (p.getAge() <= 0 || p.getAge() > 110) {
errors.rejectValue("age", "wrongAge", "enter valid age");
}
ValidationUtils.rejectIfEmpty(errors, "sex", "sexEmpty", "select sex");
ValidationUtils.rejectIfEmpty(errors, "location", "locationEmpty",
"select location");
}
}
Now, we create the controller where we register the validator for Person bean in the @InitBinder, a method to show the Person add form and another method to display the added Person
package com.dyutiman.spring.controller;
@Controller
public class PersonController {
@InitBinder
public void initModel(WebDataBinder binder) {
Object target = binder.getTarget();
if (target instanceof Person) {
if (binder.getValidator() == null) {
binder.setValidator(new PersonValidator());
}
}
}
@RequestMapping(value = "/index.htm")
public ModelAndView showForm(Person p) {
ModelAndView model = new ModelAndView("PersonForm");
model.addObject("person", p);
return model;
}
@RequestMapping(value = "/showPerson.htm", method = RequestMethod.POST)
public ModelAndView submitPerson(@Valid Person p, BindingResult error) {
// Submit to Database or else
ModelAndView model = new ModelAndView();
model.addObject("person", p);
if (error.hasErrors()) {
model.setViewName("PersonForm");
}
return model;
}
}
As the controller is built, lets create the add form view first
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!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=UTF-8">
<title>Add Person</title>
<style type="text/css">
td span{color:red;}
</style>
</head>
<body>
<form:form commandName="person" action="showPerson.htm" method="post">
<table>
<tr>
<th colspan="3">Add Person</th>
</tr>
<tr>
<td width="49%" align="right">Name</td>
<td width="2%"> </td>
<td width="49%"><form:input path="name" /><form:errors path="name"/></td>
</tr>
<tr>
<td width="49%" align="right">Age</td>
<td width="2%"> </td>
<td width="49%"><form:input path="age" /><form:errors path="age"/></td>
</tr>
<tr>
<td width="49%" align="right">Sex</td>
<td width="2%"> </td>
<td width="49%">Male: <form:radiobutton path="sex" value="male" />
Female: <form:radiobutton path="sex" value="female" /><form:errors path="sex"/></td>
</tr>
<tr>
<td width="49%" align="right">Location</td>
<td width="2%"> </td>
<td width="49%">
<form:select path="location">
<form:option value="Bangalore" />
<form:option value="Delhi" />
<form:option value="Kolkata" />
<form:option value="Mumbai" />
</form:select><form:errors path="location"/></td>
</tr>
<tr>
<td width="49%" align="right"> </td>
<td width="2%"> </td>
<td width="49%"><input type="submit" value="Save Changes" /></td>
</tr>
</table>
</form:form>
</body>
</html>
and the display view
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<table>
<tr>
<th colspan="3">Added Person</th>
</tr>
<tr>
<td width="49%" align="right"><b>Name</b></td>
<td width="2%"> </td>
<td width="49%"><c:out value="${person.name}"/></td>
</tr>
<tr>
<td width="49%" align="right"><b>Age</b></td>
<td width="2%"> </td>
<td width="49%"><c:out value="${person.age}"/></td>
</tr>
<tr>
<td width="49%" align="right"><b>Sex</b></td>
<td width="2%"> </td>
<td width="49%"><c:out value="${person.sex}"/></td>
</tr>
<tr>
<td width="49%" align="right"><b>Location</b></td>
<td width="2%"> </td>
<td width="49%"><c:out value="${person.location}"/></td>
</tr>
<tr>
<td width="49%" align="right"> </td>
<td width="2%"> </td>
<td width="49%"><a href="index.htm">go back</a></td>
</tr>
</table>
</body>
</html>
http://blog.jteam.nl/2009/05/14/simple-forms-with-spring-mvc-2-5/
http://maestric.com/doc/java/spring/form_validation
