springboot整合elasticsearch使用案例

引入依赖

<dependency><groupId>org.elasticsearch.client</groupId><artifactId>elasticsearch-rest-high-level-client</artifactId>
</dependency>

添加注入

import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;@MapperScan("cn.itcast.hotel.mapper")
@SpringBootApplication
public class HotelDemoApplication {public static void main(String[] args) {SpringApplication.run(HotelDemoApplication.class, args);}@Beanpublic RestHighLevelClient client(){return  new RestHighLevelClient(RestClient.builder(HttpHost.create("http://43.139.59.28:9200")));}}

搜索和分页

完成关键字搜索和分页

model类

import lombok.Data;@Data
public class RequestParams {private String key;private Integer page;private Integer size;private String sortBy;
}

 返回类

import lombok.Data;import java.util.List;@Data
public class PageResult {private Long total;private List<HotelDoc> hotels;public PageResult() {}public PageResult(Long total, List<HotelDoc> hotels) {this.total = total;this.hotels = hotels;}
}

controller类

@RestController
@RequestMapping("/hotel")
public class HotelController {@Autowiredprivate IHotelService hotelService;// 搜索酒店数据@PostMapping("/list")public PageResult search(@RequestBody RequestParams params){return hotelService.search(params);}
}

Service类

import cn.itcast.hotel.mapper.HotelMapper;
import cn.itcast.hotel.pojo.Hotel;
import cn.itcast.hotel.pojo.HotelDoc;
import cn.itcast.hotel.pojo.PageResult;
import cn.itcast.hotel.pojo.RequestParams;
import cn.itcast.hotel.service.IHotelService;
import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.io.IOException;
import java.util.ArrayList;
import java.util.List;@Service
public class HotelService extends ServiceImpl<HotelMapper, Hotel> implements IHotelService {@Autowiredprivate RestHighLevelClient client;@Overridepublic PageResult search(RequestParams params) {try {// 1.准备RequestSearchRequest request = new SearchRequest("hotel");// 2.准备DSL// 2.1.queryString key = params.getKey();if (key == null || "".equals(key)) {request.source().query(QueryBuilders.matchAllQuery());} else {request.source().query(QueryBuilders.matchQuery("all", key));}// 2.2.分页int page = params.getPage();int size = params.getSize();request.source().from((page - 1) * size).size(size);// 3.发送请求SearchResponse response = client.search(request, RequestOptions.DEFAULT);// 4.解析响应return handleResponse(response);} catch (IOException e) {throw new RuntimeException(e);}}// 结果解析private PageResult handleResponse(SearchResponse response) {// 4.解析响应SearchHits searchHits = response.getHits();// 4.1.获取总条数long total = searchHits.getTotalHits().value;// 4.2.文档数组SearchHit[] hits = searchHits.getHits();// 4.3.遍历List<HotelDoc> hotels = new ArrayList<>();for (SearchHit hit : hits) {// 获取文档sourceString json = hit.getSourceAsString();// 反序列化HotelDoc hotelDoc = JSON.parseObject(json, HotelDoc.class);// 放入集合hotels.add(hotelDoc);}// 4.4.封装返回return new PageResult(total, hotels);}
}

发出请求

结果过滤

添加品牌、城市、星级、价格等过滤功能

model类

import lombok.Data;@Data
public class RequestParams {private String key;private Integer page;private Integer size;private String sortBy;// 下面是新增的过滤条件参数private String city;private String brand;private String starName;private Integer minPrice;private Integer maxPrice;
}

 service类

 @Overridepublic PageResult search(RequestParams params) {try {// 1.准备RequestSearchRequest request = new SearchRequest("hotel");// 2.准备DSL// 2.1.querybuildBasicQuery(params,request);// 2.2.分页int page = params.getPage();int size = params.getSize();request.source().from((page - 1) * size).size(size);// 3.发送请求SearchResponse response = client.search(request, RequestOptions.DEFAULT);// 4.解析响应return handleResponse(response);} catch (IOException e) {throw new RuntimeException(e);}}private void buildBasicQuery(RequestParams params, SearchRequest request) {// 1.构建BooleanQueryBoolQueryBuilder boolQuery = QueryBuilders.boolQuery();// 2.关键字搜索String key = params.getKey();if (key == null || "".equals(key)) {boolQuery.must(QueryBuilders.matchAllQuery());} else {boolQuery.must(QueryBuilders.matchQuery("all", key));}// 3.城市条件if (params.getCity() != null && !params.getCity().equals("")) {boolQuery.filter(QueryBuilders.termQuery("city", params.getCity()));}// 4.品牌条件if (params.getBrand() != null && !params.getBrand().equals("")) {boolQuery.filter(QueryBuilders.termQuery("brand", params.getBrand()));}// 5.星级条件if (params.getStarName() != null && !params.getStarName().equals("")) {boolQuery.filter(QueryBuilders.termQuery("starName", params.getStarName()));}// 6.价格if (params.getMinPrice() != null && params.getMaxPrice() != null) {boolQuery.filter(QueryBuilders.rangeQuery("price").gte(params.getMinPrice()).lte(params.getMaxPrice()));}// 7.放入sourcerequest.source().query(boolQuery);}

发出请求

搜索附近

搜索我附近的酒店  

model类

import lombok.Data;@Data
public class RequestParams {private String key;private Integer page;private Integer size;private String sortBy;private String city;private String brand;private String starName;private Integer minPrice;private Integer maxPrice;// 我当前的地理坐标private String location;
}

文档类 

import lombok.Data;
import lombok.NoArgsConstructor;@Data
@NoArgsConstructor
public class HotelDoc {private Long id;private String name;private String address;private Integer price;private Integer score;private String brand;private String city;private String starName;private String business;private String location;private String pic;// 排序时的 距离值private Object distance;public HotelDoc(Hotel hotel) {this.id = hotel.getId();this.name = hotel.getName();this.address = hotel.getAddress();this.price = hotel.getPrice();this.score = hotel.getScore();this.brand = hotel.getBrand();this.city = hotel.getCity();this.starName = hotel.getStarName();this.business = hotel.getBusiness();this.location = hotel.getLatitude() + ", " + hotel.getLongitude();this.pic = hotel.getPic();}
}

service类

import cn.itcast.hotel.mapper.HotelMapper;
import cn.itcast.hotel.pojo.Hotel;
import cn.itcast.hotel.pojo.HotelDoc;
import cn.itcast.hotel.pojo.PageResult;
import cn.itcast.hotel.pojo.RequestParams;
import cn.itcast.hotel.service.IHotelService;
import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.common.unit.DistanceUnit;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.sort.SortBuilders;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.io.IOException;
import java.util.ArrayList;
import java.util.List;@Service
public class HotelService extends ServiceImpl<HotelMapper, Hotel> implements IHotelService {@Autowiredprivate RestHighLevelClient client;@Overridepublic PageResult search(RequestParams params) {try {// 1.准备RequestSearchRequest request = new SearchRequest("hotel");// 2.准备DSL// 2.1.querybuildBasicQuery(params, request);// 2.2.分页int page = params.getPage();int size = params.getSize();request.source().from((page - 1) * size).size(size);// 2.3.排序String location = params.getLocation();if (location != null && !location.equals("")) {request.source().sort(SortBuilders.geoDistanceSort("location", new GeoPoint(location)).order(SortOrder.ASC).unit(DistanceUnit.KILOMETERS));}// 3.发送请求SearchResponse response = client.search(request, RequestOptions.DEFAULT);// 4.解析响应return handleResponse(response);} catch (IOException e) {throw new RuntimeException(e);}}private void buildBasicQuery(RequestParams params, SearchRequest request) {// 1.构建BooleanQueryBoolQueryBuilder boolQuery = QueryBuilders.boolQuery();// 2.关键字搜索String key = params.getKey();if (key == null || "".equals(key)) {boolQuery.must(QueryBuilders.matchAllQuery());} else {boolQuery.must(QueryBuilders.matchQuery("all", key));}// 3.城市条件if (params.getCity() != null && !params.getCity().equals("")) {boolQuery.filter(QueryBuilders.termQuery("city", params.getCity()));}// 4.品牌条件if (params.getBrand() != null && !params.getBrand().equals("")) {boolQuery.filter(QueryBuilders.termQuery("brand", params.getBrand()));}// 5.星级条件if (params.getStarName() != null && !params.getStarName().equals("")) {boolQuery.filter(QueryBuilders.termQuery("starName", params.getStarName()));}// 6.价格if (params.getMinPrice() != null && params.getMaxPrice() != null) {boolQuery.filter(QueryBuilders.rangeQuery("price").gte(params.getMinPrice()).lte(params.getMaxPrice()));}// 7.放入sourcerequest.source().query(boolQuery);}// 结果解析private PageResult handleResponse(SearchResponse response) {// 4.解析响应SearchHits searchHits = response.getHits();// 4.1.获取总条数long total = searchHits.getTotalHits().value;// 4.2.文档数组SearchHit[] hits = searchHits.getHits();// 4.3.遍历List<HotelDoc> hotels = new ArrayList<>();for (SearchHit hit : hits) {// 获取文档sourceString json = hit.getSourceAsString();// 反序列化HotelDoc hotelDoc = JSON.parseObject(json, HotelDoc.class);// 获取排序值Object[] sortValues = hit.getSortValues();if (sortValues.length > 0) {Object sortValue = sortValues[0];hotelDoc.setDistance(sortValue);}// 放入集合hotels.add(hotelDoc);}// 4.4.封装返回return new PageResult(total, hotels);}
}

发送请求

竞价排名

 让指定的酒店在搜索结果中排名置顶

修改索引库

添加isAD字段

PUT /hotel/_mapping
{"properties":{"isAD":{"type":"boolean"}}
}

修改文档 

POST /hotel/_update/1393017952
{"doc": {"isAD": true}
}

model类

import lombok.Data;
import lombok.NoArgsConstructor;@Data
@NoArgsConstructor
public class HotelDoc {private Long id;private String name;private String address;private Integer price;private Integer score;private String brand;private String city;private String starName;private String business;private String location;private String pic;private Object distance;// 添加广告标记private Boolean isAD;public HotelDoc(Hotel hotel) {this.id = hotel.getId();this.name = hotel.getName();this.address = hotel.getAddress();this.price = hotel.getPrice();this.score = hotel.getScore();this.brand = hotel.getBrand();this.city = hotel.getCity();this.starName = hotel.getStarName();this.business = hotel.getBusiness();this.location = hotel.getLatitude() + ", " + hotel.getLongitude();this.pic = hotel.getPic();}
}

service类

import cn.itcast.hotel.mapper.HotelMapper;
import cn.itcast.hotel.pojo.Hotel;
import cn.itcast.hotel.pojo.HotelDoc;
import cn.itcast.hotel.pojo.PageResult;
import cn.itcast.hotel.pojo.RequestParams;
import cn.itcast.hotel.service.IHotelService;
import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.common.unit.DistanceUnit;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.functionscore.FunctionScoreQueryBuilder;
import org.elasticsearch.index.query.functionscore.ScoreFunctionBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.sort.SortBuilders;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.io.IOException;
import java.util.ArrayList;
import java.util.List;@Service
public class HotelService extends ServiceImpl<HotelMapper, Hotel> implements IHotelService {@Autowiredprivate RestHighLevelClient client;@Overridepublic PageResult search(RequestParams params) {try {// 1.准备RequestSearchRequest request = new SearchRequest("hotel");// 2.准备DSL// 2.1.querybuildBasicQuery(params, request);// 2.2.分页int page = params.getPage();int size = params.getSize();request.source().from((page - 1) * size).size(size);// 2.3.排序String location = params.getLocation();if (location != null && !location.equals("")) {request.source().sort(SortBuilders.geoDistanceSort("location", new GeoPoint(location)).order(SortOrder.ASC).unit(DistanceUnit.KILOMETERS));}// 3.发送请求SearchResponse response = client.search(request, RequestOptions.DEFAULT);// 4.解析响应return handleResponse(response);} catch (IOException e) {throw new RuntimeException(e);}}private void buildBasicQuery(RequestParams params, SearchRequest request) {// 1.构建BooleanQueryBoolQueryBuilder boolQuery = QueryBuilders.boolQuery();// 关键字搜索String key = params.getKey();if (key == null || "".equals(key)) {boolQuery.must(QueryBuilders.matchAllQuery());} else {boolQuery.must(QueryBuilders.matchQuery("all", key));}// 城市条件if (params.getCity() != null && !params.getCity().equals("")) {boolQuery.filter(QueryBuilders.termQuery("city", params.getCity()));}// 品牌条件if (params.getBrand() != null && !params.getBrand().equals("")) {boolQuery.filter(QueryBuilders.termQuery("brand", params.getBrand()));}// 星级条件if (params.getStarName() != null && !params.getStarName().equals("")) {boolQuery.filter(QueryBuilders.termQuery("starName", params.getStarName()));}// 价格if (params.getMinPrice() != null && params.getMaxPrice() != null) {boolQuery.filter(QueryBuilders.rangeQuery("price").gte(params.getMinPrice()).lte(params.getMaxPrice()));}// 2.算分控制FunctionScoreQueryBuilder functionScoreQuery =QueryBuilders.functionScoreQuery(// 原始查询，相关性算分的查询boolQuery,// function score的数组new FunctionScoreQueryBuilder.FilterFunctionBuilder[]{// 其中的一个function score 元素new FunctionScoreQueryBuilder.FilterFunctionBuilder(// 过滤条件QueryBuilders.termQuery("isAD", true),// 算分函数ScoreFunctionBuilders.weightFactorFunction(10))});request.source().query(functionScoreQuery);}// 结果解析private PageResult handleResponse(SearchResponse response) {// 4.解析响应SearchHits searchHits = response.getHits();// 4.1.获取总条数long total = searchHits.getTotalHits().value;// 4.2.文档数组SearchHit[] hits = searchHits.getHits();// 4.3.遍历List<HotelDoc> hotels = new ArrayList<>();for (SearchHit hit : hits) {// 获取文档sourceString json = hit.getSourceAsString();// 反序列化HotelDoc hotelDoc = JSON.parseObject(json, HotelDoc.class);// 获取排序值Object[] sortValues = hit.getSortValues();if (sortValues.length > 0) {Object sortValue = sortValues[0];hotelDoc.setDistance(sortValue);}// 放入集合hotels.add(hotelDoc);}// 4.4.封装返回return new PageResult(total, hotels);}
}

发送请求

本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若转载，请注明出处：http://www.mzph.cn/news/72275.shtml

如若内容造成侵权/违法违规/事实不符，请联系多彩编程网进行投诉反馈email:809451989@qq.com，一经查实，立即删除！

相关文章

2594. 修车的最少时间

2594. 修车的最少时间

文章目录 Tag题目来源题目解读解题思路方法一&#xff1a;二分枚举答案 写在最后 Tag 【二分枚举答案】【数组】 题目来源 2594. 修车的最少时间 题目解读 给你一个表示机械工能力的数组 ranks&#xff0c;ranks[i] 表示第 i 位机械工可以在 r a n k s [ i ] ∗ n 2 ranks[…
阅读更多...
[docker]笔记-存储管理

[docker]笔记-存储管理

1、docker数据存储分为非永久性存储和永久性存储。 非永久性存储&#xff1a;容器创建会默认创建非永久性存储&#xff0c;该存储从属于容器&#xff0c;生命周期与容器相同&#xff0c;会随着容器的关闭而消失&#xff08;可理解为内存中数据&#xff0c;会随关机而消失&…
阅读更多...
PHP表单token验证防CSRF攻击

PHP表单token验证防CSRF攻击

在PHP中&#xff0c;表单token是一种安全机制&#xff0c;用于防止跨站请求伪造&#xff08;CSRF&#xff09;攻击。 CSRF攻击是一种利用用户身份在未经授权的情况下执行非法操作的攻击方式。 表单token的原理是在表单中生成一个随机的token&#xff0c;并将其存储在服务器端…
阅读更多...
探讨下live555用的编程设计模式

探讨下live555用的编程设计模式

这个应该放到这里 7.live555mediaserver-第1阶段小结&#xff08;完整对象图和思维导图&#xff09; https://blog.csdn.net/yhb1206/article/details/127330771 但是想想&#xff0c;还是拿出来吧。 从这第1阶段就能发现&#xff0c;它实质用到了reactor网络编程模式。
阅读更多...
12. 自动化项目实战

12. 自动化项目实战

目录 1. 登录测试 2. 测试首页的帖子列表数不为0 3. 帖子详情页校验 4. 发布帖子 5. 退出登录 自动化项目实施的基本流程如下图所示&#xff1a; 手工测试用例、自动化测试用例。 1. 登录测试 校验登录后主页显示的用户名称和登录时输入的用户名是否相等。 public class…
阅读更多...
自动化运维工具Ansible教程(二)【进阶篇】

自动化运维工具Ansible教程(二)【进阶篇】

文章目录 前言Ansible 入门到精通自动化运维工具Ansible教程(一)【入门篇】自动化运维工具Ansible教程(二)【进阶篇】精通篇 进阶篇1. Ansible 的高级主题&#xff08;例如&#xff1a;角色、动态清单、变量管理等&#xff09;**1. 角色&#xff08;Roles&#xff09;**&#x…
阅读更多...
WangEditor在Vue前端的应用

WangEditor在Vue前端的应用

1、在Vue项目中安装WangEditor 对于Vue2&#xff1a; npm install wangeditor/editor-for-vue --save 或者 yarn add wangeditor/editor-for-vue 对于Vue3&#xff1a; npm install wangeditor/editor-for-vuenext --save 或者 yarn add wangeditor/editor-for-vuenext 2、将Wa…
阅读更多...
Mac brew -v 报错 fatal: detected dubious ownership in repository

Mac brew -v 报错 fatal: detected dubious ownership in repository

Mac 电脑查询 brew版本时报错&#xff0c;如下错误&#xff1a; Last login: Fri Sep 8 14:56:21 on ttys021 sunshiyusunshiyudeMacBook-Pro-2 ~ % brew -v Homebrew 4.0.3-30-g7ac31f7 fatal: detected dubious ownership in repository at /usr/local/Homebrew/Library/Ta…
阅读更多...
l8-d9 UDP通信实现

l8-d9 UDP通信实现

一、函数接口扩展与UDP通信实现流程 1.write/read到send/recv 函数原型&#xff1a; ssize_t send(int sockfd, const void *buf, size_t len, int flags); ssize_t recv(int sockfd, void *buf, size_t len, int flags); 前三个参数同read/write一样&#xff1b; ssize_t rea…
阅读更多...
Java-HashMap中put()方法是如何实现的，内含详细流程图

Java-HashMap中put()方法是如何实现的，内含详细流程图

文章目录 Java中的HashMap什么是HashMap&#xff1f;对比其他Map中put()方法HashMap中put()方法使用示例 HashMap中put()源码解析手绘流程图实现原理源码探究&#xff08;JDK 1.8&#xff09; 设计put()的意义总结 Java中的HashMap 什么是HashMap&#xff1f; HashMap是Java中…
阅读更多...
C 语言函数宏的几种封装方式

C 语言函数宏的几种封装方式

目录 1. 函数宏介绍 2. {} 方式 3. do{...}while(0) 方式 4. ({}) 方式 5. 总结 1. 函数宏介绍 函数宏&#xff0c;即包含多条语句的宏定义&#xff0c;其通常为某一被频繁调用的功能的语句封装&#xff0c;且不想通过函数方式封装来降低额外的弹栈压栈开销。 函数宏本质…
阅读更多...
羊城杯2023 部分wp

羊城杯2023 部分wp

目录 D0nt pl4y g4m3!!!(php7.4.21源码泄露&pop链构造) Serpent(pickle反序列化&python提权) ArkNights(环境变量泄露) Ez_misc(win10sinpping_tools恢复) D0nt pl4y g4m3!!!(php7.4.21源码泄露&pop链构造) 访问/p0p.php 跳转到了游戏界面 应该是存在302跳转…
阅读更多...
el-table根据data动态生成列和行

el-table根据data动态生成列和行

css //el-table-column加上fixed后会导致悬浮样式丢失&#xff0c;用下面方法可以避免 .el-table__body .el-table__row.hover-row td{background-color: #083a78 !important; } .el-table tbody tr:hover>td {background: #171F34 !important; }html <el-table ref&quo…
阅读更多...
1783_CMD启动MATLAB同时执行一个脚本

1783_CMD启动MATLAB同时执行一个脚本

全部学习汇总&#xff1a; GitHub - GreyZhang/g_matlab: MATLAB once used to be my daily tool. After many years when I go back and read my old learning notes I felt maybe I still need it in the future. So, start this repo to keep some of my old learning notes…
阅读更多...
ELK框架Logstash配合Filebeats和kafka使用

ELK框架Logstash配合Filebeats和kafka使用

ELK框架Logstash配合Filebeats和kafka使用 本文目录 ELK框架Logstash配合Filebeats和kafka使用配置文件结构input为标准输入&#xff0c;output为标准输出input为log文件output为标准输出output为es input为tcpspringboot配置logstash配置 input为filebeatsfilebeats配置logsta…
阅读更多...
Matlab论文插图绘制模板第111期—带线标记的图

Matlab论文插图绘制模板第111期—带线标记的图

本期分享的是带线标记注释的图。 先来看一下成品效果&#xff1a; 特别提示&#xff1a;本期内容『数据代码』已上传资源群中&#xff0c;加群的朋友请自行下载。有需要的朋友可以关注同名公号【阿昆的科研日常】&#xff0c;后台回复关键词【绘图桶】查看加入方式。 模板中最…
阅读更多...
PV PVC in K8s

PV PVC in K8s

摘要 在Kubernetes中&#xff0c;PV&#xff08;Persistent Volume&#xff09;和PVC&#xff08;Persistent Volume Claim&#xff09;是用于管理持久化存储的重要资源对象。PV表示存储的实际资源&#xff0c;而PVC表示对PV的声明性要求。当应用程序需要使用持久化存储时&…
阅读更多...
Android 网络配置

Android 网络配置

adb root adb shell 改变网卡网址 ifconfig eth0 192.168.0.167 up 添加虚拟网卡 ifconfig eth0:0 192.168.10.10 up 以上的命令就可以在eth0网卡上创建一个叫eth0:0的虚拟网卡,他的地址是:192.168.10.10 删除虚拟网卡 ifconfig eth0:0 down ip route 查看路由表的内容 …
阅读更多...
【数据结构】如何设计循环队列？图文解析（LeetCode）

【数据结构】如何设计循环队列？图文解析（LeetCode）

LeetCode链接&#xff1a;622. 设计循环队列 - 力扣&#xff08;LeetCode&#xff09; 目录 做题思路 只开辟 k 个空间 多开一个空间 代码实现 1. 循环队列的结构 2. 开辟空间 3. 判断空 4. 判断满 5. 队尾插入数据 6. 队头删除数据 7. 获取队头元素 8. 获取队尾元…
阅读更多...
炫酷的开关--20230907

炫酷的开关--20230907

Night && Day Toggle ☀️/&#x1f319; [Completed It!] HTML&#xff1a; <div class"controls"><label for"sync">Sync <body></label><input id"sync" type"checkbox"/> </div> &l…
阅读更多...
最新文章

Copyright @ 2022~2023