<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-validator</artifactId>
  <version>4.3.1.Final</version> 
</dependency>

import javax.validation.constraints.Pattern;
import javax.validation.constraints.Size;
import org.hibernate.validator.constraints.NotEmpty;
 
public class PayRequestDto {
   
  /**
   * 支付完成时间
   **/
  @NotEmpty(message="支付完成时间不能空")
  @Size(max=14,message="支付完成时间长度不能超过{max}位")
  private String payTime;
   
  /**
   * 状态
   **/
  @Pattern(regexp = "0[0123]", message = "状态只能为00或01或02或03")
  private String status;
 
  public String getPayTime() {
    return payTime;
  }
 
  public void setPayTime(String payTime) {
    this.payTime = payTime;
  }
 
  public String getStatus() {
    return status;
  }
 
  public void setStatus(String status) {
    this.status = status;
  }
} 

import java.util.Set;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import org.hibernate.validator.HibernateValidator;
import com.atai.framework.lang.AppException;
public class ValidationUtils {
  
  /**
   * 使用hibernate的注解来进行验证
   * 
   */
  private static Validator validator = Validation
      .byProvider(HibernateValidator.class).configure().failFast(true).buildValidatorFactory().getValidator();
  /**
   * 功能描述: <br>
   * 〈注解验证参数〉
   *
   * @param obj
   * @see [相关类/方法](可选)
   * @since [产品/模块版本](可选)
   */
  public static <T> void validate(T obj) {
    Set<ConstraintViolation<T>> constraintViolations = validator.validate(obj);
    // 抛出检验异常
    if (constraintViolations.size() > 0) {
      throw new AppException("0001", String.format("参数校验失败:%s", constraintViolations.iterator().next().getMessage()));
    }
  }
}

ValidationUtils.validate(requestDto);