1.首先匯入依賴

<!--Druid依賴包-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.3</version>
        </dependency>

2.修改配置檔案

type指定DruidDataSource資料來源，並在下面配置其他引數 applicatin.yml

#連線資料庫
spring:
  datasource:
    # 資料來源型別：Druid
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    platform: mysql
    url: jdbc:mysql://127.0.0.1:3306/db_a?useUnicode=true&characterEncoding=UTF-8
    username: root
    # 配置Druid的其他引數，以下配置必須增加一個配置檔案才能有效
    # 初始化大小，最小，最大
    initialSize: 5
    minIdle: 5
    maxActive: 20
    # 獲取連線等待超時的時間
    maxWait: 60000
    # 配置間隔多久才進行一次檢測，檢測需要關閉的空閒連線，單位是毫秒
    timeBetweenEvictionRunsMillis: 60000
    # 配置一個連線在池中最小生存的時間，單位是毫秒
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    # 配置監控統計攔截的filters，去掉後監控介面sql無法統計，'wall'用於防火牆
    filters: stat,wall
    logSlowSql: true
 

3.建立Druid配置檔案 

@Configuration
public class DruidConfiguration {
 
    private static final Logger logger = LoggerFactory.getLogger(DruidConfiguration.class);
 
    private static final String DB_PREFIX = "spring.datasource";
 
    @Bean
    public ServletRegistrationBean druidServlet() {
        logger.info("init Druid Servlet Configuration ");
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        // IP白名單
        servletRegistrationBean.addInitParameter("allow", "*");
        // IP黑名單(共同存在時，deny優先於allow)
        servletRegistrationBean.addInitParameter("deny", "192.168.1.100");
        //控制檯管理使用者
        servletRegistrationBean.addInitParameter("loginUsername", "admin");
        servletRegistrationBean.addInitParameter("loginPassword", "admin");
        //是否能夠重置資料 禁用HTML頁面上的“Reset All”功能
        servletRegistrationBean.addInitParameter("resetEnable", "false");
        return servletRegistrationBean;
    }
 
    @Bean
    public FilterRegistrationBean filterRegistrationBean() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }
 
    //解決 spring.datasource.filters=stat,wall,log4j 無法正常註冊進去
    @Component
    @ConfigurationProperties(prefix = DB_PREFIX)
    class IDataSourceProperties {
        private String url;
        private String username;
        private String password;
        private String driverClassName;
        private int initialSize;
        private int minIdle;
        private int maxActive;
        private int maxWait;
        private int timeBetweenEvictionRunsMillis;
        private int minEvictableIdleTimeMillis;
        private String validationQuery;
        private boolean testWhileIdle;
        private boolean testOnBorrow;
        private boolean testOnReturn;
        private boolean poolPreparedStatements;
        private int maxPoolPreparedStatementPerConnectionSize;
        private String filters;
        private String connectionProperties;
 
        @Bean     //宣告其為Bean例項
        @Primary  //在同樣的DataSource中，首先使用被標註的DataSource
        public DataSource dataSource() {
            DruidDataSource datasource = new DruidDataSource();
            datasource.setUrl(url);
            datasource.setUsername(username);
            datasource.setPassword(password);
            datasource.setDriverClassName(driverClassName);
 
            //configuration
            datasource.setInitialSize(initialSize);
            datasource.setMinIdle(minIdle);
            datasource.setMaxActive(maxActive);
            datasource.setMaxWait(maxWait);
            datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
            datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
            datasource.setValidationQuery(validationQuery);
            datasource.setTestWhileIdle(testWhileIdle);
            datasource.setTestOnBorrow(testOnBorrow);
            datasource.setTestOnReturn(testOnReturn);
            datasource.setPoolPreparedStatements(poolPreparedStatements);
            datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
            try {
                datasource.setFilters(filters);
            } catch (SQLException e) {
                System.err.println("druid configuration initialization filter: " + e);
            }
            datasource.setConnectionProperties(connectionProperties);
            return datasource;
        }
 
        public String getUrl() {
            return url;
        }
 
        public void setUrl(String url) {
            this.url = url;
        }
 
        public String getUsername() {
            return username;
        }
 
        public void setUsername(String username) {
            this.username = username;
        }
 
        public String getPassword() {
            return password;
        }
 
        public void setPassword(String password) {
            this.password = password;
        }
 
        public String getDriverClassName() {
            return driverClassName;
        }
 
        public void setDriverClassName(String driverClassName) {
            this.driverClassName = driverClassName;
        }
 
        public int getInitialSize() {
            return initialSize;
        }
 
        public void setInitialSize(int initialSize) {
            this.initialSize = initialSize;
        }
 
        public int getMinIdle() {
            return minIdle;
        }
 
        public void setMinIdle(int minIdle) {
            this.minIdle = minIdle;
        }
 
        public int getMaxActive() {
            return maxActive;
        }
 
        public void setMaxActive(int maxActive) {
            this.maxActive = maxActive;
        }
 
        public int getMaxWait() {
            return maxWait;
        }
 
        public void setMaxWait(int maxWait) {
            this.maxWait = maxWait;
        }
 
        public int getTimeBetweenEvictionRunsMillis() {
            return timeBetweenEvictionRunsMillis;
        }
 
        public void setTimeBetweenEvictionRunsMillis(int timeBetweenEvictionRunsMillis) {
            this.timeBetweenEvictionRunsMillis = timeBetweenEvictionRunsMillis;
        }
 
        public int getMinEvictableIdleTimeMillis() {
            return minEvictableIdleTimeMillis;
        }
 
        public void setMinEvictableIdleTimeMillis(int minEvictableIdleTimeMillis) {
            this.minEvictableIdleTimeMillis = minEvictableIdleTimeMillis;
        }
 
        public String getValidationQuery() {
            return validationQuery;
        }
 
        public void setValidationQuery(String validationQuery) {
            this.validationQuery = validationQuery;
        }
 
        public boolean isTestWhileIdle() {
            return testWhileIdle;
        }
 
        public void setTestWhileIdle(boolean testWhileIdle) {
            this.testWhileIdle = testWhileIdle;
        }
 
        public boolean isTestOnBorrow() {
            return testOnBorrow;
        }
 
        public void setTestOnBorrow(boolean testOnBorrow) {
            this.testOnBorrow = testOnBorrow;
        }
 
        public boolean isTestOnReturn() {
            return testOnReturn;
        }
 
        public void setTestOnReturn(boolean testOnReturn) {
            this.testOnReturn = testOnReturn;
        }
 
        public boolean isPoolPreparedStatements() {
            return poolPreparedStatements;
        }
 
        public void setPoolPreparedStatements(boolean poolPreparedStatements) {
            this.poolPreparedStatements = poolPreparedStatements;
        }
 
        public int getMaxPoolPreparedStatementPerConnectionSize() {
            return maxPoolPreparedStatementPerConnectionSize;
        }
 
        public void setMaxPoolPreparedStatementPerConnectionSize(int maxPoolPreparedStatementPerConnectionSize) {
            this.maxPoolPreparedStatementPerConnectionSize = maxPoolPreparedStatementPerConnectionSize;
        }
 
        public String getFilters() {
            return filters;
        }
 
        public void setFilters(String filters) {
            this.filters = filters;
        }
 
        public String getConnectionProperties() {
            return connectionProperties;
        }
 
        public void setConnectionProperties(String connectionProperties) {
            this.connectionProperties = connectionProperties;
        }
    }
 
}
 

也可以簡單一點

@Configuration
public class DruidConfig {
 
    /**
     * 加入到Spring容器中，並掃描spring.datasource字首的配置
     * @return
     */
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource druid(){
        return new DruidDataSource();
    }
}

---------------------  作者：heeyaaa  來源：CSDN  原文：https://blog.csdn.net/qq_40132161/article/details/83902109  版權宣告：本文為博主原創文章，轉載請附上博文連結！