package com.zhuma.demo.annotation;
 
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
 
import javax.validation.Constraint;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import javax.validation.Payload;
 
import org.assertj.core.util.Strings;
 
/**
 * @desc 校驗枚舉值有效性
 *
 * @author zhumaer
 * @since 10/17/2017 3:13 PM
 */
@Target({ ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE })
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = EnumValue.Validator.class)
public @interface EnumValue {
 
  String message() default "{custom.value.invalid}";
 
  Class<?>[] groups() default {};
 
  Class<? extends Payload>[] payload() default {};
 
  Class<? extends Enum<?>> enumClass();
 
  String enumMethod();
 
  class Validator implements ConstraintValidator<EnumValue, Object> {
 
    private Class<? extends Enum<?>> enumClass;
    private String enumMethod;
 
    @Override
    public void initialize(EnumValue enumValue) {
      enumMethod = enumValue.enumMethod();
      enumClass = enumValue.enumClass();
    }
 
    @Override
    public boolean isValid(Object value, ConstraintValidatorContext constraintValidatorContext) {
      if (value == null) {
        return Boolean.TRUE;
      }
 
      if (enumClass == null || enumMethod == null) {
        return Boolean.TRUE;
      }
 
      Class<?> valueClass = value.getClass();
 
      try {
        Method method = enumClass.getMethod(enumMethod, valueClass);
        if (!Boolean.TYPE.equals(method.getReturnType()) && !Boolean.class.equals(method.getReturnType())) {
          throw new RuntimeException(Strings.formatIfArgs("%s method return is not boolean type in the %s class", enumMethod, enumClass));
        }
 
        if(!Modifier.isStatic(method.getModifiers())) {
          throw new RuntimeException(Strings.formatIfArgs("%s method is not static method in the %s class", enumMethod, enumClass));
        }
   
        Boolean result = (Boolean)method.invoke(null, value);
        return result == null ? false : result;
      } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
        throw new RuntimeException(e);
      } catch (NoSuchMethodException | SecurityException e) {
        throw new RuntimeException(Strings.formatIfArgs("This %s(%s) method does not exist in the %s", enumMethod, valueClass, enumClass), e);
      }
    }
 
  }
}

package com.zhuma.demo.model.po;
 
import java.io.Serializable;
import java.util.Date;
 
import javax.validation.constraints.Pattern;
 
import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.NotBlank;
import org.hibernate.validator.constraints.Range;
 
import com.zhuma.demo.annotation.EnumValue;
import com.zhuma.demo.validator.CreateGroup;
 
/**
 * @desc 用戶PO
 
 * @author zhumaer
 * @since 6/15/2017 2:48 PM
 */
public class User implements Serializable {
 
  private static final long serialVersionUID = 2594274431751408585L;
 
  /**
   * 用戶ID
   */
  private Long id;
 
  /**
   * 登錄密碼
   */
  @NotBlank
  private String pwd;
 
  /**
   * 昵稱
   */
  @NotBlank
  @Length(min=1, max=64)
  private String nickname;
 
  /**
   * 頭像
   */
  private String img;
 
  /**
   * 電話
   */
  @Pattern(regexp = "^1[3-9]\\d{9}$")
  private String phone;
 
  /**
   * 賬號狀態(tài)
   */
  @EnumValue(enumClass=UserStatusEnum.class, enumMethod="isValidName")
  private String status;
 
  /**
   * 最新的登錄時間
   */
  private Date latestLoginTime;
 
  /**
   * 最新的登錄IP
   */
  private String latestLoginIp;
 
  private Date createTime;
  private Date updateTime;
   
  /**
   * 用戶狀態(tài)枚舉
   */
  public enum UserStatusEnum {
    /**正常的*/
    NORMAL,
    /**禁用的*/
    DISABLED,
    /**已刪除的*/
    DELETED;
 
    /**
     * 判斷參數(shù)合法性
     */
    public static boolean isValidName(String name) {
      for (UserStatusEnum userStatusEnum : UserStatusEnum.values()) {
        if (userStatusEnum.name().equals(name)) {
          return true;
        }
      }
      return false;
    }
  }
   
  //省略getter、setter方法
 
}　

package com.zhuma.demo.web.user;
 
import java.util.Date;
 
import org.springframework.http.HttpStatus;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;
 
import com.zhuma.demo.model.po.User;
 
/**
 * @desc 用戶管理控制器
 *
 * @author zhumaer
 * @since 6/20/2017 16:37 PM
 */
@RestController
@RequestMapping("/users")
public class UserController {
 
  @PostMapping
  @ResponseStatus(HttpStatus.CREATED)
  public User addUser(@Validated @RequestBody User user) {
    user.setId(10000L);
    user.setCreateTime(new Date());
    return user;
  }
 
}