Question

我是春季启动新手，在尝试使用我为创建表单而创建的类中的服务时发现了一个问题

我创建了一个验证器类来验证表格，如此处提及

https://spring.io/guides/gs/validating-form-input/

按预期工作

package com.nexill.bank.form.user;


import com.nexill.bank.entity.User;
import com.nexill.bank.repository.UserRepository;
import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.NotEmpty;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Configurable;
import org.springframework.stereotype.Component;

import javax.validation.constraints.AssertTrue;
import javax.validation.constraints.Size;

@Component
@Configurable
public class UserForm {

    @Autowired
    UserRepository userRepository;

    @Email(message = "Must be a valid email")
    @NotEmpty(message = "Email cannot be empty")
    private String email;

    @NotEmpty(message = "Password cannot be empty")
    @Size(min=6, max=30, message = "Password need to be between 6 to 30 characters")
    private String password;

    @NotEmpty(message = "Confirm password cannot be empty")
    @Size(min=6, max=30, message = "Confirm password need to be between 6 to 30 characters")
    private String confirmPassword;

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getConfirmPassword() {
        return confirmPassword;
    }

    public void setConfirmPassword(String confirmPassword) {
        this.confirmPassword = confirmPassword;
    }

    @AssertTrue(message = "Password and confirm password need to match")
    public boolean isDifferentPass() {
        return !password.equals(confirmPassword) ? false : true;
    }

    @AssertTrue(message = "Email already exists")
    public boolean isUniqueEmailForUser() {
        User x = userRepository.findUserByEmail(getEmail());
        return (x) == null;
    }
}

问题是即时获取HV000090：无法访问isUniqueEmailForUser。

当我骚扰存储库时为null。我已经在系统中使用了userRepository其他地方的autowire，它按预期工作。

主要包是com.nexill.bank包。我错过了什么。

表格在控制器中使用，如

    @RequestMapping(value = "/adminDashboard/user", method= RequestMethod.POST)
    public ModelAndView adminDashboardAddUserPost(ModelAndView modelAndView, @Valid UserForm userForm,  BindingResult bindingResult) {
        modelAndView.addObject("currentUser", authenticationFacade.getUser());
        modelAndView.addObject("userForm", userForm);
        if (!bindingResult.hasErrors()) {
            User user = new User(userForm);
            user.setRole(roleService.getRepository().findByName("BANK_STAFF"));
            userService.createUser(user);
            ModelAndView redirectModelAndView = new ModelAndView("redirect:/adminDashboard");
            redirectModelAndView.addObject("saveStatus" , true);
            return redirectModelAndView;
        }
        modelAndView.setViewName("adminDashboard/user");
        return modelAndView;
    }

提前致谢。

Answer 1

正如我在你的案例评论中提到的，你在这里只有一个POJO实例而不是bean。所以这里没有豆子可以自动装配。

相反，您可以添加自定义约束并为Validator提供注入的bean。

@Target({ElementType.METHOD, ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy=MyConstraintValidator.class)
public @interface MyConstraint {
}

可以注入bean的验证器

import javax.validation.ConstraintValidator;

public class MyConstraintValidator implements ConstraintValidator {

    @Autowired;
    private UserRepository userRepository;

    ...
}

从链接中获取代码

http://docs.spring.io/spring/docs/3.1.x/spring-framework-reference/html/validation.html#validation-beanvalidation-spring-constraints

Autowire无法在Spring启动表单中工作

1 个答案: