java反射双类型案例

随手记：A泛型的list集合，被B泛型实体射入

    public static <T, E> List<T> addProcessInstanceIdModel(List<T> list, Class<E> clazz){
        if (DailyUtil.isCollectionEmpty (list)){
            for (int i = 0; i < list.size ( ); i++) {
                try {
                    T t = list.get (i);
                    Field processInstanceIddField = clazz.getDeclaredField ("processInstanceIdd");
                    Field processInstanceIddField2 = t.getClass ().getDeclaredField ("processInstanceIdd");
                    Field idField = t.getClass ( ).getDeclaredField ("id");

                    if (idField.getGenericType ()==String.class){
                        idField.setAccessible (true);
                        // 拿到 t 对象中的属性值
                        String id = (String) idField.get (t);
                        Object o = userService.get (clazz, id);
                        if (DailyUtil.isObject (o)){
                            if (processInstanceIddField.getGenericType ()==String.class){
                                processInstanceIddField.setAccessible (true);
                                String idd = (String) processInstanceIddField.get (o);
                                // 反射进去
                                processInstanceIddField2.setAccessible (true);
                                processInstanceIddField2.set (t,idd);
                            }
                        }
                    }
                    list.set (i,t);
                }  catch (Exception e) {
                    e.printStackTrace ( );
                }
            }
        }
        return list;
    }

使用：如果list内的实体不同，则调用多次即可

            list = DailyUtil.addProcessInstanceIdModel (list,TblTasksPerMain.class);
            list = DailyUtil.addProcessInstanceIdModel (list,SwjWork.class);