給各類xxxToxxx方法造的輪子

後臺開發中有不少場景須要將數據庫實體，Dto，Vo，Param相互轉換，有的只是簡單的屬性拷貝，有的會在這基礎上再作寫其餘的處理，爲了不每次重複開發，使用泛型，開發了一套抽象類抽象共有邏輯

• AbstractBean

  封裝泛型類對象，並提供最基本的屬性拷貝方法

  class AbstractBean<T> {
    /**
     *  當前泛型真實類型的Class
     */
    private Class<T> modelClass;
  
    AbstractBean() {
        ParameterizedType pt = (ParameterizedType) this.getClass().getGenericSuperclass();
        modelClass = (Class<T>) pt.getActualTypeArguments()[0];
    }
  
    T toOtherBean(){
        try {
            T model = modelClass.newInstance();
            BeanUtils.copyProperties(this,model);
            return model;
        } catch (ReflectiveOperationException e) {
            throw new ServiceException(ResultCode.FAIL,e);
        }
    }
   }
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• AbstractModel/AbstractDto/xxx

  基於AbstractBean父類，針對Model和Dto作特殊的泛型限制，並提供模板方法給子類作後續的特殊處理

  public abstract class AbstractParam<T extends AbstractDto> extends AbstractBean<T> {
      public T toDto(){
          return super.toOtherBean();
      }
  }
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  public abstract class AbstractDto<T extends IModel> extends AbstractBean<T> {
      public T toModel(){
          return super.toOtherBean();
      }
  
      public T toModel(Consumer<T> consumer){
          T t = super.toOtherBean();
          consumer.accept(t);
          return t;
      }
  }
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• 使用方法

  @Data
  public class CustomModel implements AbstractModel {
  
      private Integer id;
      private String name;
      private String idConcatName;
  }
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  @Data
  public class CustomDto extends AbstractDto<CustomModel> {
      private Integer id;
      private String name;
  }
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  @Data
  public class CustomParam extends AbstractParam<CustomDto> {
      private Integer id;
      private String name;
  }
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  public class Test{
      public static void main(String[] args) {
            CustomParam customParam = new CustomParam();
            customParam.setId(1);
            customParam.setName("gwf");
            CustomDto customDto = customParam.toDto();
            System.out.println(JSON.toJSONString(customDto));  // 輸出 {"id":1,"name":"gwf"}
  
            CustomModel iModel = customDto.toModel(model -> model.setIdConcatName(model.getId()+":"+model.getName()));
            System.out.println(JSON.toJSONString(iModel)); // 輸出 {"id":1,"idConcatName":"1:gwf","name":"gwf"}
        }
  }
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