利用反射、注解校验字段类型

自定义注解

import java.lang.annotation.*;

@Target({ElementType.FIELD,ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface CheckNumber {
}

属性添加注解

/* 身高 */
@Column(name = "HEIGHT")
// 校验数据库定义最大长度
@javax.validation.constraints.Size(
        groups = {com.anxhit.fw.core.validation.AddGroup.class, com.anxhit.fw.core.validation.UpdGroup.class},
        max = 32, message = "height 超过最大长度")
@CheckNumber
private String height;

利用反射判断是否有注解并判断注解的值

public void  checkFiledIsNumber(GeneralInspectionPO generalInspectionPO) throws BaseException {
    if(generalInspectionPO == null){
        return;
    }
    JSONObject beanJson = JSONObject.fromObject(generalInspectionPO);
    Field[] fields = GeneralInspectionPO.class.getDeclaredFields();
    for(Field field :fields){
        if(field.isAnnotationPresent(CheckNumber.class)){
             String fieldJson = underLineToHump(field.getName());
             String value = beanJson.getString(fieldJson);
             if(StringUtils.isNotBlank(value)){
                 NumberUtils.checkIsNumberThrowException(value);
             }
        }
    }
}