Spring Boot 整合Druid

<!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.21</version>
</dependency>

<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>

log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

type: com.alibaba.druid.pool.DruidDataSource

spring:
  datasource:
    username: root
    password: 123123
    url: jdbc:mysql://localhost:3306/zshop?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource

@SpringBootTest
class Springboot04DataApplicationTests {
    @Autowired
    DataSource dataSource;

    @Test
    void contextLoads() throws SQLException {
        //数据源
        System.out.println("数据源： " + dataSource.getClass());
        //获取数据库连接
        Connection connection = dataSource.getConnection();
        System.out.println("获取连接： " + connection);
    }
}

#Spring Boot 默认是不注入这些属性值的，需要自己绑定
    #druid 数据源专有配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true

    #配置监控统计拦截的filters，stat:监控统计、log4j：日志记录、wall：防御sql注入
    #如果允许时报错  java.lang.ClassNotFoundException: org.apache.log4j.Priority
    #则导入 log4j 依赖即可，Maven 地址： https://mvnrepository.com/artifact/log4j/log4j
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

@Configuration
public class DruidConfig {
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druidDataSource(){
        return new DruidDataSource();
    }
}

@Configuration
public class DruidConfig {

    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druidDataSource(){
        return new DruidDataSource();
    }

    //后台监控
    @Bean
    public ServletRegistrationBean startViewServlet(){
        ServletRegistrationBean<StatViewServlet> bean = new ServletRegistrationBean<>(new StatViewServlet(),"/druid/*");

        //自定义参数
        HashMap<String, String> initParameters = new HashMap<>();
        //增加配置
        //登录信息：登录的用户参数是固定的 loginUsername loginPassword
        initParameters.put("loginUsername", "admin");
        initParameters.put("loginPassword", "123123");
        //访问控制：白名单,空字符串表示允许任何人访问
        initParameters.put("allow", "");
        //访问控制：黑名单
        bean.setInitParameters(initParameters);
        return bean;
    }
}

//配置 Druid 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
@Bean
public FilterRegistrationBean webStatFilter(){
    FilterRegistrationBean bean = new FilterRegistrationBean();
    bean.setFilter(new WebStatFilter());

    //参数集
    HashMap<Object, Object> initParams = new HashMap<>();
    // "/*"表示过滤所有请求
    bean.setUrlPatterns(Arrays.asList("/*"));

    //设置过滤时要排除的请求
    initParams.put("exclusions", "*.js,*.css,/druid/*");

    bean.setInitParameters(initParams);
    return bean;
}