通过反射获取类上的注解信息

落日映苍穹つ 2023-02-18 09:31 20阅读 0赞

import com.fasterxml.jackson.annotation.JsonFormat;
    import io.swagger.annotations.ApiModel;
    import io.swagger.annotations.ApiModelProperty;
    public class DeviceBrandsVo { 
    @ApiModelProperty(value = "品牌名称")
        private String brandName;
    
        @ApiModelProperty(value = "品牌介绍")
        private String brandDesc;
    
        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        @ApiModelProperty(value = "创建时间")
        private String createTime;
    
        @ApiModelProperty(value = "创建人")
        private Long creatorId;
        @ApiModelProperty(value = "创建人名称")
        private String creatorName;
        @ApiModelProperty(value = "是否删除 1正常 2删除")
        private Integer isDelete;
    
    }
    
    
    
      public static void main(String[] args) { 
            DeviceBrandsVo deviceBrandsVo = new DeviceBrandsVo();
            List<String> stringList = test(deviceBrandsVo);
            for (String s : stringList) { 
                System.out.println(s);
            }
        }
    
    
    
    
    
    
    
    import com.ruoyi.project.device.domain.newVo.DeviceBrandsVo;
    import io.swagger.annotations.ApiModelProperty;
    
    import java.lang.annotation.Annotation;
    import java.lang.reflect.Field;
    import java.util.ArrayList;
    import java.util.List;
    //入参 类对象
    public static List<String> test(Object object) { 
            List<String> annotationList = new ArrayList<>();
            Class c1 = object.getClass();
            System.out.println(c1.getName());
            try { 
                Class clazz = Class.forName(c1.getName());
                Field[] field02 = clazz.getDeclaredFields(); // 返回所有的属性
                for (Field field : field02) { 
                    String filedName = field.getName();
                    // System.out.println(field.getName());
    
                    Annotation annotation = field.getAnnotation(ApiModelProperty.class);
                    //有该类型的注解存在 
                    if (annotation != null) { 
                        //强制转化为相应的注解 
                        ApiModelProperty xmlElement = (ApiModelProperty) annotation;
                        //3、获取属性上的指定类型的注解的指定方法 
                        //具体是不是默认值可以去查看源代码 
                        //System.out.println("属性【" + filedName + "】的注释: " + xmlElement.value());
                        annotationList.add("属性【" + filedName + "】的注释: " + xmlElement.value());
                    }
                }
            } catch (ClassNotFoundException e) { 
                e.printStackTrace();
            }
            return annotationList;
        }