I know there are many similar questions here, but none of them solved my problem.
I'm using Spring 4.0.3 and Hibernate Validator 5.1.0.
The problem occurs when I try to omit the path attribute of the <form:errors/> tag, so:
<form:errors path="contato.nome" /> works
<form:errors path="*" /> works
<form:errors /> doesn't work
I don't know why it happens. Spring javadocs (org.springframework.web.servlet.tags.form.ErrorsTag) says it should work like that:
Field only - set path to the field name (or path)
Object errors only - omit path
All errors - set path to *
Can you help me, please?
The interested code is in the 'edicao.jsp' and in the method 'confirmarEdicao' of the ContatoController.java. Sorry if my english is bad.
ContatoController.java
#Controller
#RequestMapping("/contatos")
public class ContatoController {
#Autowired
private ContatoService contatoService;
#Autowired
private MessageSource messageSource;
#RequestMapping(value = "/confirmarEdicao", method = RequestMethod.POST)
public String confirmarEdicao(#Valid Contato contato, BindingResult bindingResult) {
if(bindingResult.hasErrors()) {
return "contatos/edicao";
}
contatoService.save(contato);
return "redirect:/contatos";
}
#RequestMapping(method = RequestMethod.GET)
public ModelAndView form(HttpServletRequest request) {
String message = messageSource.getMessage("teste", null, new Locale("pt", "BR"));
System.out.println(message);
return new ModelAndView("contatos/listagem")
.addObject("contatos", contatoService.list());
}
#RequestMapping("/remover/{id}")
public String remover(Contato contato) {
contatoService.delete(contato);
return "redirect:/contatos";
}
#RequestMapping("/editar/{id}")
public ModelAndView formEdicao(Contato contato) {
contato = contatoService.find(contato.getId());
return new ModelAndView("contatos/edicao")
.addObject(contato);
}
#RequestMapping(value = "/cadastrar")
public String formCadastro() {
return "contatos/cadastro";
}
#RequestMapping(value = "/confirmarCadastro", method = RequestMethod.POST)
public String confirmarCadastro(#Valid Contato contato, BindingResult bindingResult,
RedirectAttributes redirectAttributes) {
if (bindingResult.hasFieldErrors()) {
return "contatos/cadastro";
}
contatoService.save(contato);
redirectAttributes.addFlashAttribute("mensagem", "Contato cadastrado com sucesso.");
return "redirect:/contatos";
}
#ResponseBody
#RequestMapping(value = "/pesquisar/{nome}", method = RequestMethod.GET,
produces="application/json")
public List<Contato> pesquisar(#PathVariable String nome) {
return contatoService.findByName(nome);
}
}
edicao.jsp
<%# 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>Editar contato</title>
</head>
<body>
<c:set var="context">${pageContext.request.contextPath}</c:set>
<script type="text/javascript">var context = "${context}";</script>
<script src="${context}/resources/js/jquery-2.1.0.min.js"></script>
<script src="${context}/resources/js/contatos/edicao.js"></script>
<form:form commandName="contato" action="${context}/contatos/confirmarEdicao" method="post">
<form:errors/>
<table>
<form:hidden path="id"/>
<tr>
<td>Nome:</td>
<td><form:input path="nome" /></td>
</tr>
<tr>
<td>Telefone:</td>
<td><form:input path="telefone"/></td>
</tr>
<tr>
<td><input type="button" value="Voltar" id="btn_voltar"/><input type="submit" value="Salvar"/></td>
</tr>
</table>
</form:form>
</body>
</html>
Contato.java
package com.handson.model;
import javax.validation.constraints.Size;
import org.hibernate.validator.constraints.NotEmpty;
public class Contato {
private Long id;
#Size(min = 3, message = "Nome deve ter no mÃnimo 3 caracteres")
#NotEmpty(message = "O nome deve ser preenchido")
private String nome;
private String telefone;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getNome() {
return nome;
}
public void setNome(String nome) {
this.nome = nome;
}
public String getTelefone() {
return telefone;
}
public void setTelefone(String telefone) {
this.telefone = telefone;
}
public Contato withId(Long id) {
setId(id);
return this;
}
public Contato withTelefone(String telefone) {
setTelefone(telefone);
return this;
}
public Contato withNome(String nome) {
setNome(nome);
return this;
}
#Override
public String toString() {
return "Contato [id=" + id + ", nome=" + nome + ", telefone="
+ telefone + "]";
}
}
There are some keywords which should be defined:
path - EL-like path to an object or to a field of an object (e.g. foo, foo.bar or foo.bar.baz)
nested path - current path context stored as nestedPath request attribute (new paths are relative to this path)
object error - error connected with object itself (e.g. path is equal to foo)
field error - error connected with object field (e.g. path is foo.bar)
The tag <form:form commandName="foo"> defines nested path as nestedPath=foo. When you write <form:errors path="bar"> it tries to find errors defined for path foo.bar.
Lets say that you have errors connected with foo (object error), foo.bar and foo.bar.baz (nested field error). What this means:
if you enter <form:errors>, only errors bound to foo path are displayed => 1 message
if you enter <form:errors path="bar">, only errors bound to foo.bar path are displayed => 1 message
if you enter <form:errors path="*">, errors bound to foo and its child paths are displayed => 3 messages
if you enter <form:errors path="bar.*">, only child errors for foo.bar are diplayed => 1 message
if you enter <form:errors path="bar*">, errors bound to foo.bar and its child paths are diplayed => 2 messages
Checking on Errors class JavaDoc might give you additional insight.
Related
Trying to change value inside my model class which contains a private String name and I wanted to change the name using Thymeleaf in HTML page then see the change in another url response body.
When I try to access my ("/myname") page in localhost I got the error:
Error during execution of processor 'org.thymeleaf.spring4.processor.attr.SpringInputGeneralFieldAttrProcessor'
Here is my Model:
public class Name {
public String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
Here is my Controller
#Controller
public class MainController {
#RequestMapping("/name")
#ResponseBody
public String showName() {
Name myname = new Name();
return myname.getName();
}
#RequestMapping("/myname")
public String setName() {
return "myname";
}
#RequestMapping(value = "myname", method = RequestMethod.POST)
public String showName(#ModelAttribute Name iko, BindingResult errors, Model model) {
return "name";
}
}
Here is my html thymeleaf pages:
myname.html
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="ISO-8859-1"/>
<title>Insert title here</title>
</head>
<body>
<form action="#" th:action="#{/myname}" th:object="${iko}" method="post">
<label>Enter the name</label><br/>
<input type="text" th:field="*{name}"/>
<button type="submit">SUBMIT</button>
</form>
</body>
</html>
I am getting an exception while creating a form using spring forms tag library
"Neither BindingResult nor plain target object for bean name 'command' available as request attribute"
The jsp page is index.jsp
<%# include file="views/static_include.jsp" %>
<%# taglib uri="http://www.springframework.org/tags/form" prefix="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>Login to AVA Corp</title>
</head>
<body>
<form:form method="POST" commandName="user" action="login.jsp">
<table>
<tbody><tr>
<td><form:label path="firstName">Name:</form:label></td>
<td><form:input path="firstName"></form:input></td>
</tr>
<tr>
<td><form:label path="age">Age:</form:label></td>
<td><form:input path="age"></form:input></td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="Submit">
</td>
<td></td>
<td></td>
</tr>
</tbody></table>
</form:form>
</body>
</html>
The bean class is:
import java.io.Serializable;
public class Person implements Serializable {
private static final long serialVersionUID = 1949001721422434327L;
private String firstName;
private Integer age;
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}
The controller class is
#Controller
public class LoginController {
#RequestMapping(value = "/login", method = RequestMethod.GET)
public ModelAndView initForm(Model model) {
return new ModelAndView("index", "user", new Employee());
}
#RequestMapping(value = "/login", method = RequestMethod.GET)
public String login(#ModelAttribute("user") Employee employee, BindingResult result, SessionStatus status){
ModelAndView modelAndView = new ModelAndView();
modelAndView.addObject("user", employee);
return "UserFormSuccess";
}
}
I found that the issue was with the controller method with method type = "get". The value of the request method needs to be the URL mapping of the page on which the form resides e.g. index.jsp in our case so the controller class will be
#Controller
public class LoginController {
#RequestMapping(value = "/login", method = RequestMethod.GET)
public ModelAndView initForm(Model model) {
return new ModelAndView("index", "user", new Employee());
}
#RequestMapping(value = "/login", method = RequestMethod.GET)
public String login(#ModelAttribute("user") Employee employee, BindingResult result, SessionStatus status){
ModelAndView modelAndView = new ModelAndView();
modelAndView.addObject("user", employee);
return "UserFormSuccess";
}
}
In spring mvc, when creating a ModelAndView there's a method called addObject(Object attributeName) single parameter, and I don't understand how to make use of it. I also see model.addAllObjects(Map<String, ?> object).
How can I get that map in jsp? Or what is the purpose of those methods? I only know how to make use of model.addObject("car", new Car()) because is like defining servlet parameters. I found this information in spring but I don't really understand it.
Spring addObject and addAllObjects
please check the example below. i have shed how to use addObject(Object attributeValue) as well as addAllObjects(Map<String, ?> modelMap).
Car.java
public class Car {
private String regNo;
private String model;
private String year;
public String getRegNo() {
return regNo;
}
public void setRegNo(String regNo) {
this.regNo = regNo;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public String getYear() {
return year;
}
public void setYear(String year) {
this.year = year;
}
}
PageContent.java
public class PageContent {
private String headerName;
public String getHeaderName() {
return headerName;
}
public void setHeaderName(String headerName) {
this.headerName = headerName;
}
}
Controller Method
#RequestMapping(value = "/showCars", method = RequestMethod.GET)
public ModelAndView showApp() {
ModelAndView modelAndView = new ModelAndView();
//adding a single attribute for the modelMap
PageContent pageContent = new PageContent();
pageContent.setHeaderName("All Cars - From Controller");
modelAndView.addObject(pageContent);
List<Car> carList = new ArrayList<>();
Car car1 = new Car();
car1.setModel("Toyota");
car1.setRegNo("223456");
car1.setYear("2005");
Car car2 = new Car();
car2.setModel("Mazda");
car2.setRegNo("24244");
car2.setYear("2015");
Car car3 = new Car();
car3.setModel("Nissan");
car3.setRegNo("4465757");
car3.setYear("2013");
carList.add(car1);
carList.add(car2);
carList.add(car3);
Map<String,Object> allObjectsMap = new HashMap<String,Object>();
allObjectsMap.put("allCarObjects", carList);
//adding a set of objects for the model map
modelAndView.addAllObjects(allObjectsMap);
modelAndView.setViewName("CarView");
return modelAndView;
}
CarView.jsp
<%# page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%# taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html>
<html>
<head>
<title>ModelAttribute Example</title>
</head>
<body>
<h1>${pageContent.headerName}</h1>
<table>
<tr>
<th>Model</th>
<th>Registration No</th>
<th>Year of Manufacture</th>
</tr>
<c:forEach var="car" items="${allCarObjects}">
<tr>
<td><c:out value="${car.model}" /></td>
<td><c:out value="${car.regNo}" /></td>
<td><c:out value="${car.year}" /></td>
</tr>
</c:forEach>
</table>
</body>
</html>
Hope this will helpful for you!
well,the first method addObject which would invoked when forward happend and brings the data to jsp.Then you can iterate the data in your jsp with jstl or something else.The method addAllObjects is just a multiple type of addObject,just like map's method put and putAll.
I have no idea where I've made a mistake. I've been trying to solve this problem for hours but can't figure it out...
I'm getting HTTP Status 400 The request sent by the client was syntactically incorrect. while submiting the form with list of objects with some checkboxes to each of the objects.
Heres some of the code:
Controller:
#RequestMapping(value = "/admin/panel", method = RequestMethod.GET)
public String adminPanel(Locale locale, Model model, Form form,
HttpServletRequest request) {
FormWrapper wrapper = getFormWrapper();
model.addAttribute("listOfObjects", wrapper);
model.addAttribute("allCategories", dao.getCatsList());
return "WEB-INF/views/index/admin/home";
}
#RequestMapping(value = "/admin/saveAdmin", method = RequestMethod.POST)
public String save(Model model, #ModelAttribute(value="listOfObjects") FormWrapper listOfObjects) {
return "redirect:../index.html";
}
JSP:
<%# taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%# page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %>
<form:form modelAttribute="listOfObjects" method="POST" action="/admin/saveAdmin">
<c:forEach var="myObject" items="${listOfObjects.list}" varStatus="loop">
<form:checkboxes items="${allCategories}" path="list[${loop.index}].selectedCategories" itemLabel="name"/>
</c:forEach>
<input type="submit" value="saveTest"/>
</form:form>
FormWrapper:
public class FormWrapper {
private List<Form> list;
public List<Form> getList() {
return list;
}
public void setList(List<Form> list) {
this.list = list;
}
}
Category:
public class Category{
#Id #GeneratedValue(strategy=GenerationType.IDENTITY)
private Long categoryId;
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Long getCategoryId() {
return categoryId;
}
public void setCategoryId(Long categoryId) {
this.categoryId = categoryId;
}
#Override
public boolean equals(Object obj) {
if(obj instanceof Category){
return getCategoryId().equals(((Category)obj).getCategoryId());
} else {
return false;
}
}
}
Any help is appreciated. I tried to change the model attribute adnotatnion to RequestParam , but in such case , my object is always null
Is it because, the FormWrapper class do not have a property "selectedCategories".
I tried removing the "selectedCategories"
Then the form was submitted successfully.
<form:checkboxes items="${allCategories}" path="list[${loop.index}]" itemLabel="name"/>
I'm not sure I understand your jsp correctly but this problem occurs when something in the jsp form does not match with the parameters you're handling at the controller.
Are you sure that "path" variable below is ok?
<form:checkboxes items="${allCategories}" path="list[${loop.index}].selectedCategories" itemLabel="name"/>
I am using spring mvc 3.0.Here is my controller class:
#Controller
#RequestMapping("/author")
public class AuthorController {
#Autowired
private IAuthorDao authorDao;
#InitBinder
public void initBinder(WebDataBinder binder) {
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
binder.registerCustomEditor(Date.class, new CustomDateEditor(
dateFormat, true));
}
#RequestMapping(method = RequestMethod.GET)
public String get(Model model) {
return "author-list";
}
#RequestMapping(value = "/new", method = RequestMethod.GET)
public String create(Model model) {
model.addAttribute("author", new Author());
return "author-form";
}
#RequestMapping(value = "/new", method = RequestMethod.POST)
public String createPost(#ModelAttribute("author") Author author,
BindingResult result) {
new AuthorValidator().validate(author, result);
if (result.hasErrors()) {
return "author-form";
} else {
authorDao.persist(author);
return "redirect:/author/" + author.getId();
}
}
#RequestMapping(value = "/{authorId}", method = RequestMethod.GET)
public String view(#PathVariable("authorId") int authorId) {
return "author-view";
}
}
I am trying to validate author object. it has dob attr which type is Date.
I am using following class for validation:
public class AuthorValidator {
public void validate(Author author, Errors errors) {
if(author.getfName()==null)
errors.rejectValue("fName", "required", "required");
else if (!StringUtils.hasLength(author.getfName())) {
errors.rejectValue("fName", "required", "required");
}
if(author.getfName()==null)
errors.rejectValue("lName", "required", "required");
else if (!StringUtils.hasLength(author.getlName())) {
errors.rejectValue("lName", "required", "required");
}
if(author.getDob()==null)
errors.rejectValue("dob", "required", "required");
else if (!StringUtils.hasLength(author.getDob().toString())) {
errors.rejectValue("dob", "required", "required");
}
}
}
when i do no enter anything to the form it gives required message, it is correct, but when i give the incorrect format then it gives writes Failed to convert property value of type java.lang.String to required type java.util.Date for property dob; nested exception is java.lang.IllegalArgumentException: Could not parse date: Unparseable date: "asdads"
required as a message. how to make it like "Invalid date".
thanks.
If you use standard Spring facilities, all you need to do is:
Add messageSource:
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="com.example.messages" />
</bean>
Add properties file com/example/messages.properties containing one of:
typeMismatch.author.date = Invalid date
typeMismatch.date = Invalid date
typeMismatch.java.util.Date = Invalid date
typeMismatch = Invalid date
first lets you configure error message for particular field (date) in particular command object (author), second - a date field in any command object, third - a message for binding error of a field of java.util.Date class, and the final - a general message for an error resulting from any conversion.
Here's my JSP page:
<%# taglib uri="http://www.springframework.org/tags" prefix="s" %>
<%# taglib uri="http://www.springframework.org/tags/form" prefix="sf" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<sf:form commandName="author">
<sf:errors path="date" /><br />
<sf:input path="name"/><br />
<sf:input path="date"/><br />
<input type="submit" value="ok" />
</sf:form>
</body>
</html>