SpringBoot(5)-SpringBoot整合其他项目

女爷i 2023-10-14 17:42 34阅读 0赞

#### SpringBoot（5）-SpringBoot整合其他项目 ####

*   *  1.整合Druid数据库连接池
     *   *  1.1学习地址
         *  1.2application.yml
         *  1.3访问一下
         *  1.4随便执行一下新增
     *  2.整合Redis
     *   *  2.1添加redis pom依赖
         *  2.2打开redis服务
         *  2.3添加redis application.yml 依赖
         *  2.4修改redis密码（非必须）
         *  2.5biz/impl/ClazzBiz自动装配
         *  2.6biz/impl/ClazzBiz自动装配修改代码测试数据是否被缓存
         *  2.7改造biz/impl/ClazzBiz.java的代码
         *  2.8测试查询列表
     *  3.Redis注解式开发
     *   *  3.1修改RedisConfig
         *  3.2在RedisController中写一个方法
         *  3.3测试
         *  3.4 将注解值改为“test”,缓存存活时间变了，也就是说我们可以根据不同的缓存设置不同的过期时间

### 1.整合Druid数据库连接池 ###

#### 1.1学习地址 ####

https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter

添加配置，不要最新的，进过测试SQL监控失效

<dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>1.1.10</version>
            </dependency>

#### 1.2application.yml ####

mybatis:
      mapper-locations: classpath:mappers/**/*.xml
      type-aliases-package: com.hyx.springboot04.entity
    logging:
      level:
        com.hyx.springboot04: debug
    server:
      port: 8080
      servlet:
        context-path: /springboot04
    spring:
      application:
        name: springboot04
      datasource:
        driver-class-name: com.mysql.cj.jdbc.Driver
        name: defaultDataSource
        password: 123456
        url: jdbc:mysql://localhost:3306/ssmbuild?useUnicode=true&characterEncoding=UTF-8
        username: root
        type: com.alibaba.druid.pool.DruidDataSource
        druid:
          #2.连接池配置
          #初始化连接池的连接数量 大小，最小，最大
          initial-size: 5
          min-idle: 5
          max-active: 20
          #配置获取连接等待超时的时间
          max-wait: 60000
          #配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
          time-between-eviction-runs-millis: 60000
          # 配置一个连接在池中最小生存的时间，单位是毫秒
          min-evictable-idle-time-millis: 30000
          validation-query: SELECT 1 FROM DUAL
          test-while-idle: true
          test-on-borrow: true
          test-on-return: false
          # 是否缓存preparedStatement，也就是PSCache  官方建议MySQL下建议关闭   个人建议如果想用SQL防火墙 建议打开
          pool-prepared-statements: true
          max-pool-prepared-statement-per-connection-size: 20
          # 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
          filter:
            stat:
              merge-sql: true
              slow-sql-millis: 5000
          #3.基础监控配置
          web-stat-filter:
            enabled: true
            url-pattern: /*
            #设置不统计哪些URL
            exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"
            session-stat-enable: true
            session-stat-max-count: 100
          stat-view-servlet:
            enabled: true
            url-pattern: /druid/*
            reset-enable: true
            #设置监控页面的登录名和密码
            login-username: admin
            login-password: admin
            allow: 127.0.0.1
            #deny: 192.168.1.100
      freemarker:
        cache: false
        charset: utf-8
        expose-request-attributes: true
        expose-session-attributes: true
        suffix: .ftl
        template-loader-path: classpath:/templates/
      resources:
        static-locations: classpath:/static/**
    pagehelper:
      reasonable: true
      supportMethodsArguments: true
      page-size-zero: true
      helper-dialect: mysql

![image-20230810215140832][]

#### 1.3访问一下 ####

![image-20230810215703470][]

输入密码，来到我们的监控平台

![image-20230810215739754][]

SQL监控

![image-20230810215921373][]

#### 1.4随便执行一下新增 ####

![image-20230810220019350][]

![image-20230810220127186][]

也能点进来看到执行SQL的时间和语句

![image-20230810220223182][]

### 2.整合Redis ###

#### 2.1添加redis pom依赖 ####

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-redis</artifactId>
            </dependency>

#### 2.2打开redis服务 ####

![image-20230810221929139][]

#### 2.3添加redis application.yml 依赖 ####

mybatis:
      mapper-locations: classpath:mappers/**/*.xml
      type-aliases-package: com.hyx.springboot04.entity
    logging:
      level:
        com.hyx.springboot04: debug
    server:
      port: 8080
      servlet:
        context-path: /springboot04
    spring:
      application:
        name: springboot04
      datasource:
        driver-class-name: com.mysql.cj.jdbc.Driver
        name: defaultDataSource
        password: 123456
        url: jdbc:mysql://localhost:3306/ssmbuild?useUnicode=true&characterEncoding=UTF-8
        username: root
        type: com.alibaba.druid.pool.DruidDataSource
        druid:
          #2.连接池配置
          #初始化连接池的连接数量 大小，最小，最大
          initial-size: 5
          min-idle: 5
          max-active: 20
          #配置获取连接等待超时的时间
          max-wait: 60000
          #配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
          time-between-eviction-runs-millis: 60000
          # 配置一个连接在池中最小生存的时间，单位是毫秒
          min-evictable-idle-time-millis: 30000
          validation-query: SELECT 1 FROM DUAL
          test-while-idle: true
          test-on-borrow: true
          test-on-return: false
          # 是否缓存preparedStatement，也就是PSCache  官方建议MySQL下建议关闭   个人建议如果想用SQL防火墙 建议打开
          pool-prepared-statements: true
          max-pool-prepared-statement-per-connection-size: 20
          # 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
          filter:
            stat:
              merge-sql: true
              slow-sql-millis: 5000
          #3.基础监控配置
          web-stat-filter:
            enabled: true
            url-pattern: /*
            #设置不统计哪些URL
            exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"
            session-stat-enable: true
            session-stat-max-count: 100
          stat-view-servlet:
            enabled: true
            url-pattern: /druid/*
            reset-enable: true
            #设置监控页面的登录名和密码
            login-username: admin
            login-password: admin
            allow: 127.0.0.1
            #deny: 192.168.1.100
      freemarker:
        cache: false
        charset: utf-8
        expose-request-attributes: true
        expose-session-attributes: true
        suffix: .ftl
        template-loader-path: classpath:/templates/
      redis:
        host: localhost
        password: 123456
        port: 6379
        database: 8
      resources:
        static-locations: classpath:/static/**
    pagehelper:
      reasonable: true
      supportMethodsArguments: true
      page-size-zero: true
      helper-dialect: mysql

#### 2.4修改redis密码（非必须） ####

![image-20230810222424877][]

redis修改密码（我这里没有设置密码，去掉application.yml中的redis password配置）

修改

![image-20230810224143196][]

![image-20230810222820734][]

redis直接存汉字会乱码，需要序列化

#### 2.5biz/impl/ClazzBiz自动装配 ####

![image-20230810223544123][]

#### 2.6biz/impl/ClazzBiz自动装配修改代码测试数据是否被缓存 ####

![image-20230810223613622][]

![image-20230810225034968][]

#### 2.7改造biz/impl/ClazzBiz.java的代码 ####

@Override
        public List<Clazz> listPager(Clazz clazz, PageBean pageBean) {
        
            //先从缓存拿数据
            List<Clazz> clazzes =(List<Clazz>)redisTemplate.opsForValue().get("clzs");
            //如果缓存中数据为空
            if(clazzes==null){
        
                //直接查数据库
                clazzes = clazzMapper.listPager(clazz);
                //返回之前将数据库中的数据写入缓存
                redisTemplate.opsForValue().set("clzs",clazzes);
            }
            return clazzes;
        }

![image-20230810230140476][]

#### 2.8测试查询列表 ####

![image-20230810230319487][]

![image-20230810230225001][]

![image-20230810230301244][]

可见，通过redis的缓存可以减少查询数据库，降低数据库的压力

### 3.Redis注解式开发 ###

非关系型数据库

redis:基于内存的

ehcache 基于文件的

mongodb 基于文档的

#### 3.1修改RedisConfig ####

package com.hyx.springboot04.config;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.data.redis.cache.RedisCacheConfiguration;
    import org.springframework.data.redis.cache.RedisCacheManager;
    import org.springframework.data.redis.connection.RedisConnectionFactory;
    import org.springframework.data.redis.core.RedisTemplate;
    import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
    import org.springframework.data.redis.serializer.RedisSerializationContext;
    import org.springframework.data.redis.serializer.StringRedisSerializer;
    
    import java.time.Duration;
    import java.util.HashMap;
    import java.util.HashSet;
    import java.util.Map;
    import java.util.Set;
    
    @EnableCaching
    @Configuration
    public class RedisConfig {
        
        private final int defaultExpireTime = 600;
    
        private final int userCacheExpireTime = 60;
    
        private final String userCacheName = "test";
        @Bean
        public RedisTemplate<String,Object> getRedisTemplate(RedisConnectionFactory connectionFactory){
        
            RedisTemplate<String,Object> redisTemplate = new RedisTemplate<>();
    
            redisTemplate.setKeySerializer(new StringRedisSerializer());
            redisTemplate.setHashKeySerializer(new StringRedisSerializer());
            redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
            redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
    //        redisTemplate.afterPropertiesSet();
    
            redisTemplate.setConnectionFactory(connectionFactory);
            return redisTemplate;
        }
    
    
        @Bean
        public RedisCacheManager redis(RedisConnectionFactory connectionFactory){
        
            RedisCacheConfiguration defaultCacheConfig = RedisCacheConfiguration.defaultCacheConfig();
            // 设置缓存管理器管理的缓存的默认过期时间
            defaultCacheConfig = defaultCacheConfig.entryTtl(Duration.ofSeconds(defaultExpireTime))
                    // 设置 key为string序列化
                    .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
                    // 设置value为json序列化
                    .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()))
                    // 不缓存空值
                    .disableCachingNullValues();
    
            Set<String> cacheNames = new HashSet<>();
            cacheNames.add(userCacheName);
    
            // 对每个缓存空间应用不同的配置
            Map<String, RedisCacheConfiguration> configMap = new HashMap<>();
            configMap.put(userCacheName, defaultCacheConfig.entryTtl(Duration.ofSeconds(userCacheExpireTime)));
    
            RedisCacheManager cacheManager = RedisCacheManager.builder(connectionFactory)
                    .cacheDefaults(defaultCacheConfig)
                    .initialCacheNames(cacheNames)
                    .withInitialCacheConfigurations(configMap)
                    .build();
    
            return cacheManager;
        }
    }

![image-20230810235424757][]

#### 3.2在RedisController中写一个方法 ####

@ResponseBody
        @RequestMapping("/load")
        public Clazz load(int cid){
        
            return clazzBiz.selectByPrimaryKey(cid);
        }

#### 3.3测试 ####

![image-20230810235319115][]

![image-20230811000306560][]

#### 3.4 将注解值改为“test”,缓存存活时间变了，也就是说我们可以根据不同的缓存设置不同的过期时间 ####

![image-20230811000516183][]

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