JAVA 注解反射 过滤修改对象值

1、注解类

    

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


/**
 * @Author Minco
 * @Date 8:44 2020-07-24
 * @Description 价格控制数据注解
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface PriceLimit {


    /**
     * 字段类型（0：不限制；1：进价类权限限制；2：价格类权限限制）
     */
    Type type() default Type.ALL;

    public enum Type {

        ALL(0), JLIMIT(1), LIMIT(2);
        private final int value;

        Type(int value) {
            this.value = value;
        }

        public int value() {
            return this.value;
        }
    }
}

2、实体类

import com.hieasy.comm.annotation.PriceLimit;
import lombok.Data;

@Data
public class Xssj {

    @PriceLimit(type = PriceLimit.Type.LIMIT)
    private String xsje;
    @PriceLimit(type = PriceLimit.Type.JLIMIT)
    private String bzjje;
    @PriceLimit(type = PriceLimit.Type.JLIMIT)
    private String mlr;
    @PriceLimit(type = PriceLimit.Type.JLIMIT)
    private String mll;
    private double pjzk;
    private double tbl;
    private double hbl;
    private String dxdm;
    private String dxmc;
    private String type;
    private int sl;
    @PriceLimit(type = PriceLimit.Type.LIMIT)
    private String je;
    @PriceLimit(type = PriceLimit.Type.JLIMIT)
    private String mlrqn; //去年毛利润
    @PriceLimit(type = PriceLimit.Type.JLIMIT)
    private String mlrsy; //上月毛利润


}

3、工具类

public <T> void fltPriceLimit(Object object,SysUserLimit limit) throws Exception {
        Field[] fields = object.getClass().getDeclaredFields();  // 获取实体类的所有属性，返回Field数组
        for(Field field:fields){
            PriceLimit attr = field.getAnnotation(PriceLimit.class);
            Integer type=0;
            if(null!=attr) type=attr.type().value();
            if(type==1) {
                if(limit.getLimitJPriceShow()==1 || limit.getLimitPriceShow()==1) {

                    if(field!=null){
                        field.setAccessible(true);//修改作用域
                        field.set(object,"***");//设置值
                    }
                }
            }else if(type==2){
                if(limit.getLimitPriceShow()==1) {
                    if(field!=null){
                        field.setAccessible(true);//修改作用域
                        field.set(object,"***");//设置值
                    }
                }
            }
        }
    }

4、测试

    public static void main(String[] args) throws Exception{
        SysUserLimit limit=new SysUserLimit();
        limit.setLimitJPriceShow(1);
        limit.setLimitPriceShow(0);
        Xssj xssj=new Xssj();
        System.out.println("原对象："+xssj);
        CommonService commonService=new CommonServiceImpl();
        commonService.fltPriceLimit(xssj,limit);
        System.out.println("过滤对象："+xssj);
    }

5、输出结果

6、扩展

此类方法还可以应用到非整形的数据格式化..