为休眠中的唯一约束添加自定义消息 [英] Add a Custom message for the Unique Constraints in hibernate
问题描述
@Entity @Table(name="users",uniqueConstraints = {@UniqueConstraint(columnNames = {"email"})})
public class User implements Serializable {
@Column(unique = true,name = "email")
@NotNull(message = "{NotNull.email}")
@Email(message = "{Pattern.email}")
@Size(min=10, max=50)
private String email;
public String getEmail() { return email; }
public void setEmail(String email) { this.email = email; }
}
我有可以正常工作的message.properties文件
I have the message.properties file which is working fine
NotNull.email = Email is required
Pattern.email = Enter a valid email address
我可以在message.properties文件中添加另一个字段,例如
can i add another field in the message.properties file like
Unique.email = Email already exits
并将此Unique.email发送给
and give this Unique.email to the
@Column(unique = true,name = "email",message="{Unique.email}")
我知道,我们不能在上一行中保留message ="{Unique.email}".
I know, we cannot keep message="{Unique.email}" in the above line.
但是我们如何在上面的列中添加"Unique.email"以获取自定义错误消息
but how can we give "Unique.email" to the above column in order to get the custom error message
??
预先感谢
推荐答案
模型User.java中的用户定义批注"@Unique"
User defined annotation "@Unique" in the model User.java
@Column(unique = true,name = "email")
@Unique(message = "{Unique.email}")
private String email;
message.properties
message.properties
Unique.email = Email id already exists
Unique.java
Unique.java
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import javax.validation.Constraint;
import javax.validation.Payload;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
@Documented
@Target({ElementType.METHOD, ElementType.FIELD})
@Constraint(validatedBy = UserUniqueValidator.class)
@Retention(RUNTIME)
public @interface Unique {
String message();
Class<?>[] groups() default { };
Class<? extends Payload>[] payload() default { };
}
UserUniqueValidator.java
UserUniqueValidator.java
import com.User;
import com.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
public class UserUniqueValidator implements ConstraintValidator<Unique,String> {
@Autowired
private UserService userService;
@Override
public void initialize(Unique unique) {
unique.message();
}
@Override
public boolean isValid(String email, ConstraintValidatorContext context) {
if (userService != null && userService.existsByEmail(email,User.class)) {
return false;
}
return true;
}
}
UserService.java
UserService.java
public interface UserService {
public boolean existsByEmail(String email,Class clazz);
}
UserServiceImpl.java
UserServiceImpl.java
import com.UserRepository;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
@Service
@Transactional
public class UserServiceImpl extends UserRepository implements UserService {
@Override
public boolean existsByEmail(String email, Class clazz) {
return super.existsByEmail(email,clazz);
}
}
UserRepository.java
UserRepository.java
public class UserRepository {
public boolean existsByEmail(String email, Class className) {
Criteria criteria = getSession().createCriteria(className,"userEmail");
criteria.add(Restrictions.eq("email",email));
if(criteria.list().size() == 0){
return false;
}
return true;
}
}
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