springboot整合Druid(德鲁伊)配置多数据源数据库连接池

pom.xml

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.13</version>
</dependency>

<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.1.0</version>
</dependency>

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.12</version>
</dependency>

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

application.properties

#d1数据库连接
spring.datasource.d1.driver-class-name = com.mysql.cj.jdbc.Driver
spring.datasource.d1.url = jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai
spring.datasource.d1.username = root
spring.datasource.d1.password = root

#d1数据库连接池配置
spring.datasource.d1.type=com.alibaba.druid.pool.DruidDataSource
#初始连接数
spring.datasource.d1.initialSize=1
#最小连接数
spring.datasource.d1.minIdle=3
#最大连接数
spring.datasource.d1.maxActive=20
#配置获取连接等待超时的时间
spring.datasource.d1.maxWait=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
spring.datasource.d1.timeBetweenEvictionRunsMillis=60000
#配置一个连接在池中最小生存的时间，单位是毫秒
spring.datasource.d1.minEvictableIdleTimeMillis=30000
spring.datasource.d1.validationQuery=SELECT 1 FROM DUAL
spring.datasource.d1.testWhileIdle=true
spring.datasource.d1.testOnBorrow=false
spring.datasource.d1.testOnReturn=false
spring.datasource.d1.poolPreparedStatements=true
#配置监控统计拦截的filters，stat:监控统计、slf4j：日志记录、wall：防御sql注入
spring.datasource.d1.filters=stat,wall,slf4j
spring.datasource.d1.maxPoolPreparedStatementPerConnectionSize=20

多数据源配置d1连接配置类

@Configuration
@MapperScan(basePackages = "com.test.dao.d1.mapper", sqlSessionTemplateRef = "d1SqlSessionTemplate")
public class D1DatabaseConfig {
    @Bean(name = "d1DataSource")
    @ConfigurationProperties(prefix = "spring.datasource.d1")
    public DataSource d1DataSource() {
        DruidDataSource druidDataSource = new DruidDataSource();
        return druidDataSource;
    }

    @Bean(name = "d1SqlSessionFactory")
    public SqlSessionFactory d1SqlSessionFactory(@Qualifier("d1DataSource") DataSource dataSource) throws Exception {
        MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:com/test/dao/d1/mapper/*.xml"));
        // 指明实体扫描(多个package用逗号或者分号分隔)
        MybatisConfiguration configuration = new MybatisConfiguration();
        bean.setTypeAliasesPackage("com.test.dao.d1");
        // 导入mybatis配置
        configuration.setJdbcTypeForNull(JdbcType.NULL);
        configuration.setMapUnderscoreToCamelCase(true);
        configuration.setCacheEnabled(false);
        // 配置打印sql语句
        configuration.setLogImpl(StdOutImpl.class);
        bean.setConfiguration(configuration);
        return bean.getObject();
    }

    @Bean(name = "d1TransactionManager")
    public DataSourceTransactionManager d1TransactionManager(@Qualifier("d1DataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "d1SqlSessionTemplate")
    public SqlSessionTemplate d1SqlSessionTemplate(@Qualifier("d1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }

    @Bean
    public PaginationInterceptor paginationInterceptor() {
        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
        return paginationInterceptor;
    }
}

Druid监控配置

/**
 * 配置 Druid 监控管理后台的Servlet；
 * 内置 Servler 容器时没有web.xml文件，所以使用 Spring Boot 的注册 Servlet 方式
 * @return
 */
@Bean
public ServletRegistrationBean statViewServlet() {
    ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
    Map<String, String> initParams = new HashMap<>();
    //后台管理界面的登录账号
    initParams.put("loginUsername", "admin");
    //后台管理界面的登录密码
    initParams.put("loginPassword", "123456");
    //后台允许谁(ip)可以访问，为空或者为null时，表示允许所有访问
    initParams.put("allow", "");
    //后台拒绝谁访问
    //initParams.put("kuangshen", "192.168.1.20");表示禁止此ip访问
    //设置初始化参数
    bean.setInitParameters(initParams);
    return bean;
}
/**
 * 配置 Druid 监控 之  web 监控的 filter
 * WebStatFilter：用于配置Web和Druid数据源之间的管理关联监控统计
 * @return
 */
@Bean
public FilterRegistrationBean webStatFilter() {
    FilterRegistrationBean bean = new FilterRegistrationBean();
    bean.setFilter(new WebStatFilter());
    //exclusions：设置哪些请求进行过滤排除掉，从而不进行统计
    Map<String, String> initParams = new HashMap<>();
    initParams.put("exclusions", "*.js,*.css,/druid/*");
    bean.setInitParameters(initParams);
    //"/*" 表示过滤所有请求
    bean.setUrlPatterns(Arrays.asList("/*"));
    return bean;
}

测试

//注入数据源
    @Autowired
    @Qualifier("d1DataSource")
    DataSource dataSource;
    @Test
    public void contextLoads() throws SQLException {
        //看一下默认数据源
        System.out.println(dataSource.getClass());
        //获得连接
        Connection connection =   dataSource.getConnection();
        System.out.println(connection);
        DruidDataSource druidDataSource = (DruidDataSource) dataSource;
        System.out.println("druidDataSource 数据源最大连接数：" + druidDataSource.getMaxActive());
        System.out.println("druidDataSource 数据源初始化连接数：" + druidDataSource.getInitialSize());
        //关闭连接
        connection.close();
    }