Spring 3基于批注的验证：密码和确认密码

在我的Spring 3 MVC应用程序中，用户需要保存一个密码，如果他们在保存时也能够确认密码，这将是一个不错的功能。Spring 3基于批注的验证：密码和确认密码

在我使用基于注释的验证的bean。是否有可用于执行此检查的注释验证程序？

经过一番googleing后，我找到了这个博客：http://gochev.blogspot.com/2010/06/spring-mvc-spring-bean-validation.html。但我想我错过了一个jar-lib，因为Eclipse无法找到/建议任何jar。任何人都知道我需要这个工作的罐子？

在此先感谢:)

来源

2011-08-30 jorgen

您需要Hibernate验证和JSR 303 Api jar。

<dependency> 
     <groupId>org.hibernate</groupId> 
     <artifactId>hibernate-validator</artifactId> 
     <version>4.1.0.Final</version>       
    </dependency> 
    <dependency> 
     <groupId>javax.validation</groupId> 
     <artifactId>validation-api</artifactId> 
     <version>1.0.0.GA</version> 
    </dependency>

看到这个问题：Cross field validation with Hibernate Validator (JSR 303)

有几种方法来解决这一问题。

来源

2011-08-30 12:24:22 Ralph

我写的，以验证密码以下内容：

约束实现：

package com.test.web.validation.user; 

import java.lang.annotation.Documented; 
import java.lang.annotation.ElementType; 
import java.lang.annotation.Retention; 
import java.lang.annotation.RetentionPolicy; 
import java.lang.annotation.Target; 

import javax.validation.Constraint; 
import javax.validation.Payload; 

@Target({ ElementType.TYPE }) 
@Retention(RetentionPolicy.RUNTIME) 
@Documented 
@Constraint(validatedBy = PasswordsEqualConstraintValidator.class) 
public @interface PasswordsEqualConstraint { 
String message(); 

Class<?>[] groups() default {}; 

Class<? extends Payload>[] payload() default {}; 
} 

package com.test.web.validation.user; 

import javax.validation.ConstraintValidator; 
import javax.validation.ConstraintValidatorContext; 

import com.test.logic.dto.UserDto; 

public class PasswordsEqualConstraintValidator implements 
    ConstraintValidator<PasswordsEqualConstraint, Object> { 

@Override 
public void initialize(PasswordsEqualConstraint arg0) { 
} 

@Override 
public boolean isValid(Object candidate, ConstraintValidatorContext arg1) { 
    UserDto user = (UserDto) candidate; 
    return user.getPassword().equals(user.getPasswordRepeat()); 
} 
}

我的DTO对象：

package com.test.logic.dto; 

import java.io.Serializable; 
import java.util.ArrayList; 
import java.util.Date; 
import java.util.List; 

import javax.validation.constraints.NotNull; 
import javax.validation.constraints.Size; 

import com.esldic.web.validation.user.EmailExistsConstraint; 
import com.esldic.web.validation.user.PasswordsEqualConstraint; 

@PasswordsEqualConstraint(message = "passwords are not equal") 
public final class UserDto extends AbstractDto implements Serializable { 

private static final long serialVersionUID = 1L; 

private Long id; 

@NotNull 
@Size(min = 3, max = 30) 
@EmailExistsConstraint(message = "email is not available") 
private String email; 

private String username; 

@NotNull 
@Size(min = 2, max = 30) 
private String password; 

@NotNull 
@Size(min = 2, max = 30) 
private String passwordRepeat; 
... 
}

最后，我的控制器

package com.test.web.controllers; 

import java.util.Set; 

import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
import javax.validation.ConstraintViolation; 
import javax.validation.Validator; 

import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.stereotype.Controller; 
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.ResponseBody; 
import org.springframework.web.servlet.ModelAndView; 

import com.test.logic.dto.UserDto; 

@Controller 
public final class SignupController { 

@Autowired 
private Validator validator; 

@RequestMapping(value = "/signup.html", method = RequestMethod.POST) 
public @ResponseBody 
ModelAndView handleSignupForm(@ModelAttribute UserDto candidate, 
     HttpServletResponse response) throws ServiceException { 
    Set<ConstraintViolation<UserDto>> failures = validator 
      .validate(candidate); 

    if (!failures.isEmpty()) { 
     response.setStatus(HttpServletResponse.SC_BAD_REQUEST); 
     return ValidationHelper.validationMessages(failures); 

    } else { 
     return userService.create(candidate); 
    } 
}

此外，在谷歌，你会发现很多JSR-303 bean验证的样本。

来源

2011-08-30 14:13:48

Cyril Deba接受的解决方案也适用于我。但是之后我必须为ResetPassword和ChangePassword Page做另一个注释，因为它们有不同的DTO。为了克服这个问题，我将isValid改为了下面的代码。虽然它也可以通过实现接口来实现，但我认为这一个更现实。希望它会有所帮助。

@Override 
public boolean isValid(Object candidate, ConstraintValidatorContext context) { 

    try { 
     Method methodGetPassword = candidate.getClass().getMethod("getPassword"); 
     Method methodGetConfirmpassword = candidate.getClass().getMethod("getConfirmpassword"); 

     if(methodGetPassword.invoke(candidate) == null && methodGetConfirmpassword.invoke(candidate)==null) 
      return true; 
     else if(methodGetPassword.invoke(candidate) == null) 
      return false; 
     return methodGetPassword.invoke(candidate).equals(methodGetConfirmpassword.invoke(candidate)); 

    } catch (NoSuchMethodException ex) { 
     ex.printStackTrace(); 
     return false; 
    } catch (Exception ex) { 
     ex.printStackTrace(); 
     return false; 
    } 
}

来源

2017-09-23 10:49:37 Vikash

Spring 3基于批注的验证：密码和确认密码

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