我想在春天创建一个注册和登录表单。我的问题是我在登记时获得null和username的password值。
我的控制器：
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.citrya.app.model.User;
import com.citrya.app.model.UserForm;
import com.citrya.app.service.SecurityService;
import com.citrya.app.service.UserService;
import com.citrya.app.validator.UserValidator;
@Controller
public class UserController {
@Autowired
private UserService userService;
@Autowired
private SecurityService securityService;
@Autowired
private UserValidator userValidator;
@PostMapping("/registration")
public String registration( @ModelAttribute("userForm") UserForm userForm, BindingResult result,Model model ) {
System.out.println("User at controller post =" + userForm.getUsername() );
User user = new User();
user.setUsername(userForm.getUsername());
user.setPassword(userForm.getPassword());
userValidator.validate(user, result);
if ( result.hasErrors() ) return "register";
userService.save(user);
securityService.autoLogin(userForm.getUsername(), userForm.getPassword() );
return "redirect:/welcome";
}
@GetMapping("/registration")
public String registration( Model model) {
model.addAttribute("userForm", new UserForm() );
return "register";
}
@RequestMapping ( value = "/login" ,method = RequestMethod.GET )
public String login( Model model, String error, String logout ) {
if ( error != null ) {
model.addAttribute("error", "Your username and password is invalid");
}
if ( logout != null ) {
model.addAttribute("message", "You have successfully logged out");
}
return "login";
}
@RequestMapping( value = { "/", "/welcome"} , method = RequestMethod.GET )
public String welcome( Model model ) {
return "welcome";
}
}
我尝试单独使用用户对象（表单获取模型属性）并尝试为表单（userForm）创建自定义对象，但仍然无法正常工作。
我的百里叶模板如下：
<html xmlns="http://www.thymeleaf.org" th:replace="~{ fragments/layout :: layout (~{::body}, 'CITRYA | Register') }">
<body>
<div class = "container">
<div class="jumbotron">
<h1 class="display-4">Welcome to Citrya</h1>
<p class="lead">Let us understand what you like and use that information to shove advertisements down your throats.</p>
<hr class="my-4">
<p>We are here for your information nothing else. Just kidding we are here to profit from you too.</p>
<p class="lead">
<a class="btn btn-primary btn-lg" href="#" role="button">Learn more</a>
</p>
</div>
<div class= "row">
<div class= "col-md-4">
<span th:text="${message}">MSG</span>
<span th:text="${error}">ERR</span>
<form th:action="@{/registration}" th:object="${userForm}" method="POST" >
<label for="username" th:text="Username">Name </label>
<input type="text" th:feild="*{username}" class="form-control" placeholder="Ex: John96">
<label for="password" th:text="Password">Pass</label>
<input type="password" th:feild="*{password}" class="form-control" placeholder="Ex: John96">
<button type="submit" class="btn btn-primary">Register</button>
</form>
</div>
</div>
</div>
</body>
</html>
当我打印出用户名到控制台时，我得到null。
我的用户和用户形式模型如下：
@Entity
@Table( name = "users")
public class User{
private String username;
private String password;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
@ManyToMany
@JoinTable(name = "user_tag", joinColumns = @JoinColumn( name = "user_id"), inverseJoinColumns = @JoinColumn(name = "tag_id"))
private Set<Tag> tags;
@OneToMany
private Set<Tag> seenTags;
@ManyToMany
@JoinTable( name = "user_role", joinColumns = @JoinColumn( name = "user_id"), inverseJoinColumns = @JoinColumn( name= "role_id"))
private Set<Role> roles;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Set<Tag> getTags(){
return tags;
}
public void setTags(Set<Tag> tags) {
this.tags = tags;
}
public Set<Role> getRoles(){
return roles;
}
public void setRoles(Set<Role> roles) {
this.roles = roles;
}
public Set<Tag> getSeenTags() {
return seenTags;
}
public void setSeenTags( Set<Tag> seenTags ) {
this.seenTags = seenTags;
}
}
用户窗体：
public class UserForm {
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
在th:feild的错字。
将其更改为字段
<input type="text" th:field="*{username}" class="form-control" placeholder="Ex: John96">