[黑马程序员SpringBoot2]——开发实用篇2

news2024/9/22 4:36:38

目录：

  1. Mongodb简介
  2. Mongodb下载与安装
  3. Mongodb基础操作
  4. Sprintboot整合Mongodb
  5. ES简介
  6. ES下载与安装
  7. ES索引操作
  8. ES文档操作
  9. SpringBoot整合ES客户端操作
  10. 添加文档
  11. 查询文档
  12. 缓存的作用
  13. Spring缓存使用方式
  14. 手机验证码案例-生成验证码
  15. 手机验证码案例-验证码校验
  16. 变更缓存供应商Ehcache
  17. 数据淘汰策略
  18. 变更缓存供应商Redis
  19. memcached下载与安装
  20. 变更缓存供应商memcached

1.Mongodb简介

Mongodb

  • MongoDB是一个开源、高性能、无模式的文档型数据库。NoSQL数据库产品中的一种，是最像关系型数据库的非关系型数据库

淘宝用户数据

  • 存储位置:数据库
  • 特征:永久性存储，修改频度极低

游戏装备数据、游戏道具数据

  • 存储位置:数据库、Mongodb.
  • 特征:永久性存储与临时存储相结合、修改频度较高

直播数据、打赏数据、粉丝数据

  • 存储位置:数据库、Mongadb.
  • 特征:永久性存储与临时存储相结合，修改频度极高

物联网数据

  • 存储位置:Mongadb.
  • 特征:临时存储，修改频度飞速

其他数据...... 

2.Mongodb下载与安装

  • Windows版Mongo下载
    • https:/www.mongodb.com/try/download
  • Windows版Mongo安装
    • 解压缩后设置数据目录
  • Windows版Mongo启动

服务端启动

mongod --dbpath=. . \dataldb.

客户端启动

mongo --host=127.0.0.1 --port=27017

3.Mongodb基础操作

新增


修改


删除

4.Sprintboot整合Mongodb

导入Mongodb驱动

配置客户端

客户端读写Mongodb

Springboot17MongodbApplicationTest.class

package com.example.sprintboot_17_mongodb;

import com.example.sprintboot_17_mongodb.domain.Book;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.mongodb.core.MongoTemplate;

import java.util.List;

@SpringBootTest
class Sprintboot17MongodbApplicationTests {
    @Autowired
    private MongoTemplate mongoTemplate;

    @Test
    void contextLoads() {
        Book book = new Book();
        book.setId(1);
        book.setName("sprintboot");
        book.setType("sprintboot");
        book.setDesctiption("sprintboot");
        mongoTemplate.save(book);
    }

    @Test
    void find() {
        List<Book> all = mongoTemplate.findAll(Book.class);
        System.out.println(all);
    }
    
}

Book.class

package com.example.sprintboot_17_mongodb.domain;

import lombok.Data;

@Data
public class Book {
    private int id;
    private String name;
    private String type;
    private String desctiption;
}

applicaiton.yml

spring:
  data:
    mongodb:
      uri: mongodb://localhost/itheima

5.ES简介

Elasticsearch是一个分布式全文搜索引擎

 

6.ES下载与安装

Windows版ES下载

  • https://www.elastic.co/cn/downloads/elasticsearch

Windows版ES安装与启动 

7.ES索引操作

创建/查询/删除索引

IK分词器

  • 下载: https://github.com/medcl/elasticsearch-analysis-ik/releases

 创建索引并指定规则

8.ES文档操作 

创建文档

查询文档

条件查询

册除文档

修改文档（全量修改)

修改文档(部分修改)

 

9.SpringBoot整合ES客户端操作

导入坐标

配置

客户端

SpringBoat平台并没有跟随ES的更新速度进行同步更新，ES提供了High Level Client操作ES 

导入坐标

客户端

客户端改进

application.yml

spring:
  datasource:
    druid:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3308/test_db
      username: root
      password: 666666
#  elasticsearch:
#    rest:
#      uris: http://localhost:9200

mybatis-plus:
  global-config:
    db-config:
      table-prefix: tbl_
      id-type: auto
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

Book.class

package com.example.sprintboot_18_es.domain;

import lombok.Data;

@Data
public class Book {
    private Integer id;
    private String type;
    private String name;
    private String description;
}

 BookDao.interfacer

package com.example.sprintboot_18_es.dao;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.sprintboot_18_es.domain.Book;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface BookDao extends BaseMapper<Book> {

}

Sprintboot18EsApplicationTests.class

package com.example.sprintboot_18_es;

import org.apache.http.HttpHost;
import org.elasticsearch.action.admin.indices.create.CreateIndexRequest;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

import java.io.IOException;

@SpringBootTest
class Sprintboot18EsApplicationTests {

//    @Autowired
//    private BookDao bookDao;
//
//    @Test
//    void contextLoads() {
//        bookDao.selectById(1);
//    }


//    @Autowired
//    private ElasticsearchRestTemplate template;

    @BeforeEach
    void setUp() {
        HttpHost host = HttpHost.create("http://localhost:9200");
        RestClientBuilder builder = RestClient.builder(host);
        client = new RestHighLevelClient(builder);
    }

    @AfterEach
    void tearDown() throws IOException {
        client.close();
    }


    private RestHighLevelClient client;

//    @Test
//    void testCreateClient() throws IOException {
//        HttpHost host = HttpHost.create("http://localhost:9200");
//        RestClientBuilder builder = RestClient.builder(host);
//        client = new RestHighLevelClient(builder);
//        client.close();
//    }


    @Test
    void testCreateIndex() throws IOException {
        CreateIndexRequest request = new CreateIndexRequest("books");
        client.indices().create(request, RequestOptions.DEFAULT);
    }
}

10.添加文档 

创建索引

添加文档

批量添加文档

Sprintboot18EsAoolicationTests.class

package com.example.sprintboot_18_es;

import com.alibaba.fastjson.JSON;
import com.example.sprintboot_18_es.dao.BookDao;
import com.example.sprintboot_18_es.domain.Book;
import com.oracle.xmlns.internal.webservices.jaxws_databinding.XmlOneway;
import org.apache.http.HttpHost;
import org.elasticsearch.action.admin.indices.create.CreateIndexRequest;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import java.io.IOException;
import java.util.List;

@SpringBootTest
class Sprintboot18EsApplicationTests {

    @Autowired
    private BookDao bookDao;
//
//    @Test
//    void contextLoads() {
//        bookDao.selectById(1);
//    }


//    @Autowired
//    private ElasticsearchRestTemplate template;

    @BeforeEach
    void setUp() {
        HttpHost host = HttpHost.create("http://localhost:9200");
        RestClientBuilder builder = RestClient.builder(host);
        client = new RestHighLevelClient(builder);
    }

    @AfterEach
    void tearDown() throws IOException {
        client.close();
    }


    private RestHighLevelClient client;


//    @Test
//    void testCreateClient() throws IOException {
//        HttpHost host = HttpHost.create("http://localhost:9200");
//        RestClientBuilder builder = RestClient.builder(host);
//        client = new RestHighLevelClient(builder);
//        client.close();
//    }


    @Test
    void testCreateIndex() throws IOException {
        CreateIndexRequest request = new CreateIndexRequest("books");
        client.indices().create(request, RequestOptions.DEFAULT);
    }

    @Test
    void testCreateIndexByIK() throws IOException {
        CreateIndexRequest request = new CreateIndexRequest("books");
        String json = "";
        request.source(json, XContentType.JSON);
        client.indices().create(request, RequestOptions.DEFAULT);
    }

    @Test
    void testCreateDoc() throws IOException {
        Book book = bookDao.selectById(1);
        IndexRequest request = new IndexRequest("books").id(book.getId().toString());
        String json = JSON.toJSONString(book);
        request.source(json, XContentType.JSON);
        client.index(request, RequestOptions.DEFAULT);
    }


    @Test
    void testCreateDocAll() throws IOException {
        List<Book> bookList = bookDao.selectList(null);
        BulkRequest bulk = new BulkRequest();

        for (Book book : bookList) {
            IndexRequest request = new IndexRequest("books").id(book.getId().toString());
            String json = JSON.toJSONString(book);
            request.source(json, XContentType.JSON);
            bulk.add(request);
        }

        client.bulk(bulk, RequestOptions.DEFAULT);
    }


}

11.查询文档 

按id查询文档

按条件查询文档

 Sprintboot18EsAoolicationTests.class

package com.example.sprintboot_18_es;

import com.alibaba.fastjson.JSON;
import com.example.sprintboot_18_es.dao.BookDao;
import com.example.sprintboot_18_es.domain.Book;
import com.oracle.xmlns.internal.webservices.jaxws_databinding.XmlOneway;
import org.apache.http.HttpHost;
import org.elasticsearch.action.admin.indices.create.CreateIndexRequest;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import java.io.IOException;
import java.util.List;

@SpringBootTest
class Sprintboot18EsApplicationTests {

    @Autowired
    private BookDao bookDao;
//
//    @Test
//    void contextLoads() {
//        bookDao.selectById(1);
//    }


//    @Autowired
//    private ElasticsearchRestTemplate template;

    @BeforeEach
    void setUp() {
        HttpHost host = HttpHost.create("http://localhost:9200");
        RestClientBuilder builder = RestClient.builder(host);
        client = new RestHighLevelClient(builder);
    }

    @AfterEach
    void tearDown() throws IOException {
        client.close();
    }


    private RestHighLevelClient client;


//    @Test
//    void testCreateClient() throws IOException {
//        HttpHost host = HttpHost.create("http://localhost:9200");
//        RestClientBuilder builder = RestClient.builder(host);
//        client = new RestHighLevelClient(builder);
//        client.close();
//    }


    @Test
    void testCreateIndex() throws IOException {
        CreateIndexRequest request = new CreateIndexRequest("books");
        client.indices().create(request, RequestOptions.DEFAULT);
    }

    @Test
    void testCreateIndexByIK() throws IOException {
        CreateIndexRequest request = new CreateIndexRequest("books");
        String json = "";
        request.source(json, XContentType.JSON);
        client.indices().create(request, RequestOptions.DEFAULT);
    }

    @Test
    void testCreateDoc() throws IOException {
        Book book = bookDao.selectById(1);
        IndexRequest request = new IndexRequest("books").id(book.getId().toString());
        String json = JSON.toJSONString(book);
        request.source(json, XContentType.JSON);
        client.index(request, RequestOptions.DEFAULT);
    }


    @Test
    void testCreateDocAll() throws IOException {
        List<Book> bookList = bookDao.selectList(null);
        BulkRequest bulk = new BulkRequest();

        for (Book book : bookList) {
            IndexRequest request = new IndexRequest("books").id(book.getId().toString());
            String json = JSON.toJSONString(book);
            request.source(json, XContentType.JSON);
            bulk.add(request);
        }

        client.bulk(bulk, RequestOptions.DEFAULT);
    }

    @Test
    void testGet() throws IOException {
        GetRequest request = new GetRequest("books", "1");
        GetResponse response = client.get(request, RequestOptions.DEFAULT);
        String json = response.getSourceAsString();
        System.out.println(json);
    }

    @Test
    void testSearch() throws IOException {
        SearchRequest request = new SearchRequest("books");
        SearchSourceBuilder builder = new SearchSourceBuilder();
        builder.query(QueryBuilders.termQuery("name", "spring"));
        request.source(builder);
        SearchResponse response = client.search(request, RequestOptions.DEFAULT);
        SearchHits hits = response.getHits();
        for (SearchHit hit : hits) {
            String source = hit.getSourceAsString();
            System.out.println(source);
            Book book = JSON.parseObject(source, Book.class);
            System.out.println(book);
        }
    }


}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>sprintboot_18_es</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>sprintboot_18_es</name>
    <description>sprintboot_18_es</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.1</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.6</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <!--        <dependency>-->
        <!--            <groupId>org.springframework.boot</groupId>-->
        <!--            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>-->
        <!--        </dependency>-->
        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-high-level-client</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.78</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <image>
                        <builder>paketobuildpacks/builder-jammy-base:latest</builder>
                    </image>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

12.缓存的作用

  • 缓存是—种介于数据永久存储介质与数据应用之间的数据临时存储介质
  • 使用缓存可以有效的减少低速数据读取过程的次数（例如磁盘IO)，提高系统性能
  • 缓存不仅可以用于提高永久性存储介质的数据读取效率，还可以提供临时的数据存储空间

BookController.class

package com.example.sprintboot_19_cache.controller;

import com.example.sprintboot_19_cache.domain.Book;
import com.example.sprintboot_19_cache.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/books")
public class BookController {
    @Autowired
    private BookService bookService;

    @GetMapping("{id}")
    public Book getById(@PathVariable Integer id) {
        return bookService.getById(id);
    }

    @PostMapping
    public boolean save(@RequestBody Book book) {
        return bookService.save(book);
    }

    @PutMapping
    public boolean update(@RequestBody Book book) {
        return bookService.update(book);
    }

    @DeleteMapping("{id}")
    public boolean delete(@PathVariable Integer id) {
        return bookService.delete(id);
    }

    @GetMapping
    public List<Book> getAll() {
        return bookService.getAll();
    }
}

MsgController.class

package com.example.sprintboot_19_cache.controller;

import com.example.sprintboot_19_cache.service.MsgService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping("/msg")
public class MsgController {

    @Autowired
    private MsgService msgService;

    @GetMapping("{tele}")
    public String getById(@PathVariable String tele) {
        return msgService.get(tele);
    }

    @PostMapping
    public boolean check(String tele, String code) {
        return msgService.check(tele, code);
    }
}

BookDao.class

package com.example.sprintboot_19_cache.dao;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.sprintboot_19_cache.domain.Book;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface BookDao extends BaseMapper<Book> {
}

Book.class

package com.example.sprintboot_19_cache.domain;

import lombok.Data;

@Data
public class Book {
    private Integer id;
    private String type;
    private String name;
    private String description;
}

BookServiceImpl.class

package com.example.sprintboot_19_cache.service.impl;

import com.example.sprintboot_19_cache.dao.BookDao;
import com.example.sprintboot_19_cache.domain.Book;
import com.example.sprintboot_19_cache.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.List;

@Service
public class BookServiceImpl implements BookService {
    @Autowired
    private BookDao bookDao;


    private HashMap<Integer, Book> cache = new HashMap<Integer, Book>();

    @Override
    public Book getById(Integer id) {
        Book book = cache.get(id);
        if (book == null) {
            Book queryBook = bookDao.selectById(id);
            cache.put(id, queryBook);
            return queryBook;
        }
        return cache.get(id);
    }

    @Override
    public boolean save(Book book) {
        return bookDao.insert(book) > 0;
    }

    @Override
    public boolean update(Book book) {
        return bookDao.updateById(book) > 0;
    }

    @Override
    public boolean delete(Integer id) {
        return bookDao.deleteById(id) > 0;
    }

    @Override
    public List<Book> getAll() {
        return bookDao.selectList(null);
    }
}

MsgServiceImpl.class

package com.example.sprintboot_19_cache.service.impl;

import com.example.sprintboot_19_cache.service.MsgService;
import org.springframework.stereotype.Service;

import java.util.HashMap;

@Service
public class MsgServiceImpl implements MsgService {

    private HashMap<String, String> cache = new HashMap<String, String>();

    @Override
    public String get(String tele) {
        String code = tele.substring(tele.length() - 6);
        cache.put(tele, code);
        return code;
    }

    @Override
    public boolean check(String tele, String code) {
        String queryCode = cache.get(tele);
        return code.equals(queryCode);
    }
}

BookService.class

package com.example.sprintboot_19_cache.service;

import com.example.sprintboot_19_cache.domain.Book;

import java.util.List;

public interface BookService {
    public boolean save(Book book);

    public Book getById(Integer id);

    public boolean update(Book book);

    public boolean delete(Integer id);

    public List<Book> getAll();
}

MsgService.class

package com.example.sprintboot_19_cache.service;

public interface MsgService {
    public String get(String tele);

    public boolean check(String tele, String code);
}

application.yml

spring:
  datasource:
    druid:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3308/test_db
      username: root
      password: 666666


mybatis-plus:
  global-config:
    db-config:
      table-prefix: tbl_
      id-type: auto
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

server:
  port: 8080

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>sprintboot_19_cache</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>sprintboot_19_cache</name>
    <description>sprintboot_19_cache</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.3</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.6</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <image>
                        <builder>paketobuildpacks/builder-jammy-base:latest</builder>
                    </image>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

13.Spring缓存使用方式

  •  SpringBoot提供了缓存技术，方便缓存使用
  • 启用缓存
  • 设置进入缓存的数据
  • 设置读取缓存的数据

 导入缓存技术对应的starter

设置当前操作的结果数据进入缓存

 

springBoot启用缓存的方式

  • @EnableCaching
  • @Cacheable

14.手机验证码案例-生成验证码

  • SpringBoot提供的缓存技术除了提供默认的缓存方案，还可以对其他缓存技术进行整合，统一接口，方便缓存技术的开发与管理
  • Generic
  • JCache
  • Ehcache
  • Hazelcast
  • lnfinispan
  • Couchbase
  • Redis
  • Caffeine
  • Simple(默认)
  • memcached

缓存使用案例——手机验证码

需求

  • 输入手机号获取验证码，组织文档以短信形式发送给用户(页面模拟)
  • 输入手机号和验证码验证结果

需求分析

  • 提供controller，传入手机号，业务层通过手机号计算出独有的6位验证码数据，存入缓存后返回此数据
  • 提供controller，传入手机号与验证码，业务层通过手机号从缓存中读取验证码与输入验证码进行比对，返回比对结果 

 开启缓存

业务层接口

  

业务层设置获取验证码操作，并存储缓存，手机号为key，验证码为value

  

15.手机验证码案例-验证码校验

  业务层设置校验验证码操作，校验码通过缓存读取，返回校验结果

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>sprintboot_19_cache</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>sprintboot_19_cache</name>
    <description>sprintboot_19_cache</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.3</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.6</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <image>
                        <builder>paketobuildpacks/builder-jammy-base:latest</builder>
                    </image>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

 applicaiton.yml

spring:
  datasource:
    druid:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3308/test_db
      username: root
      password: 666666


mybatis-plus:
  global-config:
    db-config:
      table-prefix: tbl_
      id-type: auto
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

server:
  port: 8080

CodeUtils.class

package com.example.sprintboot_19_cache.utils;

import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Component;

@Component
public class CodeUtils {

    private String[] patch = {"000000", "00000", "0000", "000", "00", "0", ""};

    public String generator(String tele) {
        int hash = tele.hashCode();
        int encryption = 20206666;
        long result = hash ^ encryption;
        long nowTime = System.currentTimeMillis();
        result = result ^ nowTime;
        long code = result % 1000000;
        code = code < 0 ? -code : code;
        String codeStr = code + "";
        int len = codeStr.length();

        return patch[len] + codeStr;
    }


    @Cacheable(value = "smsCode", key = "#tele")
    public String get(String tele) {
        return null;
    }

    public static void main(String[] args) {
        System.out.println(new CodeUtils().generator("15033657967"));
    }
}

SMSCodeService.interface

package com.example.sprintboot_19_cache.service;

import com.example.sprintboot_19_cache.domain.SMSCode;

public interface SMSCodeService {
    public String sendCodeToSMS(String tele);

    public boolean checkCode(SMSCode smsCode);
}

SMSCodeServiceImpl.class 

package com.example.sprintboot_19_cache.service.impl;

import com.example.sprintboot_19_cache.domain.SMSCode;
import com.example.sprintboot_19_cache.service.SMSCodeService;
import com.example.sprintboot_19_cache.utils.CodeUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CachePut;
import org.springframework.stereotype.Service;

@Service
public class SMSCodeServiceImpl implements SMSCodeService {

    @Autowired
    private CodeUtils codeUtils;

    @Override
    @CachePut(value = "smsCode", key = "#tele")
    public String sendCodeToSMS(String tele) {
        String code = codeUtils.generator(tele);
        return code;
    }

    @Override
    public boolean checkCode(SMSCode smsCode) {
        String code = smsCode.getCode();
        String cacheCode = codeUtils.get(smsCode.getTele());
        return code.equals(cacheCode);
    }

}

SMSCode.class

package com.example.sprintboot_19_cache.domain;

import lombok.Data;

@Data
public class SMSCode {
    private String tele;
    private String code;
}

SMSCodeController.class

package com.example.sprintboot_19_cache.controller;

import com.example.sprintboot_19_cache.domain.SMSCode;
import com.example.sprintboot_19_cache.service.SMSCodeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/sms")
public class SMSCodeController {

    @Autowired
    private SMSCodeService smsCodeService;

    @GetMapping
    public String getCode(String tele) {
        String code = smsCodeService.sendCodeToSMS(tele);
        return code;
    }

    @PostMapping
    public boolean checkCode(SMSCode smsCode) {
        return smsCodeService.checkCode(smsCode);
    }
}

16.变更缓存供应商Ehcache

 加入Ehcache坐标(缓存供应商实现)

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>sprintboot_19_cache</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>sprintboot_19_cache</name>
    <description>sprintboot_19_cache</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.3</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.6</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
        </dependency>
        <dependency>
            <groupId>net.sf.ehcache</groupId>
            <artifactId>ehcache</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <image>
                        <builder>paketobuildpacks/builder-jammy-base:latest</builder>
                    </image>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

 

缓存设定为使用Ehcache

 

applicaiton.yml

spring:
  datasource:
    druid:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3308/test_db
      username: root
      password: 666666
  cache:
    type: ehcache
    ehcache:
      config: ehcache.xml

mybatis-plus:
  global-config:
    db-config:
      table-prefix: tbl_
      id-type: auto
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

server:
  port: 8080

 

提供ehcache配置文件ehcache.xml 

 

ehcache.xml 

<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
         updateCheck="false">
    <diskStore path="F:\ehcache"/>
    <defaultCache
            eternal="false"
            diskPersistent="false"
            maxElementsInMemory="1000"
            overflowToDisk="false"
            timeToIdleSeconds="60"
            timeToLiveSeconds="60"
            memoryStoreEvictionPolicy="LRU"/>

    <cache
            name="smsCode"
            eternal="false"
            diskPersistent="false"
            maxElementsInMemory="1000"
            overflowToDisk="false"
            timeToIdleSeconds="10"
            timeToLiveSeconds="10"
            memoryStoreEvictionPolicy="LRU"/>
</ehcache>

17.数据淘汰策略

 

18.变更缓存供应商Redis

 加入Redis坐标（缓存供应商实现)

 

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>sprintboot_19_cache</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>sprintboot_19_cache</name>
    <description>sprintboot_19_cache</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.3</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.6</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
        </dependency>
        <dependency>
            <groupId>net.sf.ehcache</groupId>
            <artifactId>ehcache</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <image>
                        <builder>paketobuildpacks/builder-jammy-base:latest</builder>
                    </image>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

 

配置Redis服务器，缓存设定为使用Redis.

设置Redis相关配置

applicaiton.yml 

#spring:
#  datasource:
#    druid:
#      driver-class-name: com.mysql.cj.jdbc.Driver
#      url: jdbc:mysql://localhost:3308/test_db
#      username: root
#      password: 666666
#  cache:
#    type: ehcache
#    ehcache:
#      config: ehcache.xml

mybatis-plus:
  global-config:
    db-config:
      table-prefix: tbl_
      id-type: auto
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

server:
  port: 8080

spring:
  datasource:
    druid:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3308/test_db
      username: root
      password: 666666
  cache:
    type: redis
    redis:
      time-to-live: 10s
      cache-null-values: false
  #      key-prefix: sms_
  #      use-key-prefix: false

  redis:
    host: localhost
    port: 6379

19.memcached下载与安装

下载memcached

  • 地址: https://www.runoob.com/memcached/window-install-memcached.html 

安装memcached

  • 使用管理员身份运行cmd指令

 

 安装

  • memcached.exe -d install

运行memcached

  • 启动服务 
    • memcached.exe -d start
  • 停止服务
    • memcached.exe -d stop

 

20. 变更缓存供应商memcached

  • memcached客户端选择
    • Memcached client for Java:最早期客户端，稳定可靠，用户群广
    • SpyMemcached:效率更高
    • xmemcached:并发处理更好
  • SpningBoot未提供对memcached的整合，需要使用硬编码方式实现客户端初始化管理

加入Xmemcache坐标（缓存供应商实现)

配置memcached服务器必要属性

创建读取属性配置信息类，加载配置

 创建客户端配置类

配置memcached属性

 

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