java 动态表单设计

梦里梦外; 2023-01-23 10:57 289阅读 0赞

## 项目需求 ##

不同的任务会有不同的配置，根据所选择的任务，展示不同的表单

## 思路 ##

后端给页面返回 List <String,List> list, object 是各任务所有的属性集合

## 代码 ##

// 自定义注解
    @Target({ ElementType.FIELD})
    @Retention(RetentionPolicy.RUNTIME)
    public @interface TaskProperty { 
    
        /** * 属性描述名 */
        String label() default "";
    
        /** * 默认值 */
        String defaultValue() default "";
    
        /** * 是否必填 */
        boolean required() default false;
        
        /** * 输入框文本 */
        String placeHolder() default "";
    }
    
    
     //所有可执行的 枚举
    @Getter
    public enum TaskConfigEnum { 
    
        HNZX(HnUploadConfig.class,"定时"),
        ;
        private Class type;
        private String name;
    
        TaskConfigEnum(Class type, String name) { 
            this.type = type;
            this.name = name;
        }
    }
    
    // 对用task 需要的配置
    @Data
    public class HnUploadConfig { 
    
        @TaskProperty (required = true,label = "ip地址",placeHolder = "127.0.0.1")
        private String host;
        @TaskProperty(required = true,label = "端口")
        private String port;
        @TaskProperty (required = true,label = "表达式")
        private String cron;
        @TaskProperty (required = true,label = "方法名")
        private String method;
        @TaskProperty (required = true,label = "参数")
        private String param;
    }
    
    // main method
        public Object getTranslatorList() { 
            TaskConfigEnum[] translators = TaskConfigEnum.values();
            List<TaskVo> list = Arrays.stream(translators).map(translator -> { 
                TaskVovo = new TaskVo();
                vo.setName(translator.getName());
                Class<?> type = translator.getType();
                Field[] fields = type.getDeclaredFields();
                List<TaskPropertyVo> propertyList = Arrays.stream(fields).filter(field -> field.isAnnotationPresent(TaskProperty.class)).map(field -> { 
                    TaskPropertyVo property = new TaskPropertyVo();
                    property.setName(field.getName());
                    TaskProperty translatorProperty = field.getAnnotation(TaskProperty.class);
                    if (StringUtils.isNotBlank(translatorProperty.label())) { 
                        property.setLabel(translatorProperty.label());
                    } else { 
                        property.setLabel(field.getName());
                    }
                    property.setRequired(translatorProperty.required());
                    property.setPlaceHolder(translatorProperty.placeHolder());
                    
                    return property;
                }).collect(Collectors.toList());
                vo.setPropertyList(propertyList);
                return vo;
            }).collect(Collectors.toList());
            return list;
        }
    
    @Data
    public class TaskVo { 
        //名称
        private String name;
        //属性集合
        private List<TaskPropertyVo> propertyList;
    }
    
    @Data
    public class TaskPropertyVo { 
       //属性名称
        private String name;
       //属性描述
        private String label;
       //是否必填
        private boolean required;
       //placeHolder
        private String placeHolder;
    }