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问题2的解答:modCount变量是一个整数变量,一旦集合被修改(无论是增加、删除、插入),modCount就会增加。 3.在学习ProgramOfStudy类的代码时,对替代方法replace中的一行代码,该代码为if(targetIndex!=-1)不理解,虽然隐约猜到了是当目标元素索引值不返回-1,即目标索引值存在的话就进行list.set(targetIndex,newCourse...
@Field(type=FieldType.Text, analyzer = "ik_max_word", searchAnalyzer = "ik_max_word") private String title; @Field(index = true, analyzer = "ik_max_word", searchAnalyzer = "ik_max_word") private String category; @Field(index = true, analyzer = "ik_max_word", searchAnalyzer = "...
@GetMapping("/vul/order") public List<User> orderBy(String field, String sort) { log.info("[vul] mybaits: order by " + field + " " + sort); return userMapper.orderBy(field, sort); UserMapper.xml select * from users order by ${field} ${sort} 因为未知列名,使用盲注:结果输...
Comparable 简介 Comparable 是排序接口。 若一个类实现了Comparable接口,就意味着“该类支持排序”。 即然实现Comparable接口的类支持排序,假设现在存在“实现Comparable接口的类的对象的List列表(或数组)”,则该List列表(或数组)可以通过 Col
定义中序遍历(In-order Traversal)在二叉搜索树(BST)中非常有用,因为它会按照升序的方式访问节点。但在其他类型的树中,这种顺序就不一定了。...示例下面我会首先解释二叉搜索树的中序遍历,然后用一个图例来说明。二叉搜索树的中序遍历在二叉搜索树中,中序遍历会
orderby_list::= orderby_item [,orderby_item]* orderby_item::= [property_or_field_name] [ASC | DESC] If ASC or DESC is not specified, ASC (ascending order) is assumed. If the ordering element is not specified for an entity association, ordering by the primary key of the associat...
Orderd是spring core中定义的一个接口,使用它以及相关的Comparator和@Order注解,可以实现对元素的排序。 @Order 直接先说下@Order注解吧,使用场景较多。 @Retention(RetentionPolicy.RUNTIME)@Target({ElementType.TYPE, ElementType.METHOD, ElementType.FIELD})@Documentedpublic@interfaceOrder {/** ...
order by model.userInfoId DESC";try{// //判断是否为String数组类型if(valueinstanceofString[]){//如果为true则强转成String数组String[]arr=(String[])value;for(int i=0;i<arr.length;i++){this.getHibernateTemplate().find(queryString,value);list.add(this.getHibernateTemplate().find(queryString,ar...
orderby_list::= orderby_item [,orderby_item]* orderby_item::= [property_or_field_name] [ASC | DESC] IfASCorDESCis not specified,ASC(ascending order) is assumed. If the ordering element is not specified, ordering by the primary key of the associated entity is assumed. ...