SpringBoot+Mybatis+Spring缓存抽象+Druid数据源的整合

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本文介绍了SpringBoot、Mybatis、Spring缓存抽象和Druid数据源的整合。先搭建项目环境，包括用IDEA搭建项目、配置MyBatis和Druid数据源等；接着介绍Spring缓存抽象的使用，配置简单；最后进行测试，体现了缓存优势，还可通过监控记录数据访问。

SpringBoot+Mybatis+Spring缓存抽象+Druid数据源的整合

SpringBoot对这几种的整合非常简单，无非就是pom.xml文件添加几个依赖罢了，稍微有点复杂的就是druid数据源的配置。有了Druid之后可以非常方便的对数据源进行监控和分析。

1、项目环境的搭建

第一步
用IDEA快速搭建出项目，勾选这几个组件（当然，不勾选也行，之后再pom.xml引入依赖即可），其它配置根据自己喜好或者一路next也可。
在这里插入图片描述
第二步
对MyBatis和Druid数据源进行配置

application.yml

<?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 http://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>2.1.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo2</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo2</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.0.1</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
            <version>5.1.37</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.1.18</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

第三步
配置druid的信息，使上面我们配置的数据源各种属性能加载上去。新建druidconfig类，配置信息
在这里插入图片描述
DruidConfig.class

package com.example.demo2.config;


import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;


@Configuration
public class DruidConfig {
    //加载druid的配置
    @ConfigurationProperties(prefix ="spring.datasource")
    @Bean
    public DataSource druid(){
        return new DruidDataSource();
    }
    //配置druid监控
    //1、配置一个管理后台的servlet
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        Map<String,String> initParams = new HashMap<>();
        initParams.put("loginUsername","admin");
        initParams.put("loginPassword","123456");
        servletRegistrationBean.setInitParameters(initParams);
        return servletRegistrationBean;
    }
    //2、配置一个web监控的filter
    @Bean
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());

        Map<String,String> initParams = new HashMap<>();
        initParams.put("exclusions","*.js,*.css,/druid/*");

        bean.setInitParameters(initParams);

        bean.setUrlPatterns(Arrays.asList("/*"));

        return  bean;
    }

}

第四步
配置mybatis的全部设置和局部的映射
mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

</configuration>

UserMapper.xml(这就是正常的sql代码)

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.demo2.mapper.UserMapper">
    <select id="getUserById" resultType="com.example.demo2.bean.User">
        select * from user where uid = #{uid}
  </select>
</mapper>

在这里插入图片描述
这里的mapper扫描，我试过不加也可以正常使用

环境已经配置好了，测试下进入druid后台监控看看