摘要:导读最近一段时间比较忙,以至于很久没有更新系列文章,恰好最近用到,就将使用作为数据源做一个简单的介绍。效果图如下参考资料官方地址使用集成数据库连接池使用和监控配置方法
导读
最近一段时间比较忙,以至于很久没有更新Spring Boot系列文章,恰好最近用到Druid, 就将Spring Boot 使用 Druid作为数据源做一个简单的介绍。
Druid介绍:Druid是阿里巴巴开源的数据库连接池,Druid号称是Java语言中最好的数据库连接池,并且能够提供强大的监控和扩展功能,Druid的官方地址
了解更多:
JDBC连接池、监控组件 Druid (oschina)
快速上手:下面来说明如何在 spring Boot 中配置使用Druid ,本例使用的持久层框为Spring Boot JPA。
第一步:添加pom依赖:第二步:配置yml文件 数据源相关信息org.springframework.boot spring-boot-starter-data-jpa com.alibaba druid 1.0.20
spring: datasource: url: jdbc:mysql://localhost:3306/sanji-boot?useUnicode=true&characterEncoding=utf-8&useSSL=false username: root password: 123456 driver-class-name: com.mysql.jdbc.Driver platform: mysql type: com.alibaba.druid.pool.DruidDataSource # 下面为连接池的补充设置,应用到上面所有数据源中 # 初始化大小,最小,最大 initialSize: 1 minIdle: 3 maxActive: 20 # 配置获取连接等待超时的时间 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 timeBetweenEvictionRunsMillis: 60000 # 配置一个连接在池中最小生存的时间,单位是毫秒 minEvictableIdleTimeMillis: 30000 validationQuery: select "x" testWhileIdle: true testOnBorrow: false testOnReturn: false # 打开PSCache,并且指定每个连接上PSCache的大小 poolPreparedStatements: true maxPoolPreparedStatementPerConnectionSize: 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 filters: stat,wall,slf4j # 通过connectProperties属性来打开mergeSql功能;慢SQL记录 connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000 # 合并多个DruidDataSource的监控数据 #useGlobalDataSourceStat: true jpa: show-sql: true properties: hibernate: hbm2ddl: auto: create第三步:配置Druid的监控统计功能
这里有两种方式 :
第一种方式@Confing注解 配置类:
@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白名单 servletRegistrationBean.addInitParameter("allow", "192.168.2.25,127.0.0.1"); // IP黑名单(共同存在时,deny优先于allow) servletRegistrationBean.addInitParameter("deny", "192.168.1.100"); //控制台管理用户 servletRegistrationBean.addInitParameter("loginUsername", "admin"); servletRegistrationBean.addInitParameter("loginPassword", "admin"); //是否能够重置数据 禁用HTML页面上的“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; } //解决 spring.datasource.filters=stat,wall,log4j 无法正常注册进去 @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 //声明其为Bean实例 @Primary //在同样的DataSource中,首先使用被标注的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; } } }
第二种方式基于注解的配置:
首先在启动类上加上注解:@ServletComponentScan使Spring能够扫描到我们自己编写的servlet和filter。
//druid数据源状态监控. @WebServlet(urlPatterns = "/druid/*", initParams = { // IP白名单 (没有配置或者为空,则允许所有访问) @WebInitParam(name = "allow", value = "192.168.1.72,127.0.0.1"), // IP黑名单 (存在共同时,deny优先于allow) @WebInitParam(name = "deny", value = "192.168.1.73"), // 用户名 @WebInitParam(name = "loginUsername", value = "admin"), // 密码 @WebInitParam(name = "loginPassword", value = "admin"), // 禁用HTML页面上的“Reset All”功能 @WebInitParam(name = "resetEnable", value = "false") } ) public class DruidStatViewServlet extends StatViewServlet { }
// druid过滤器. @WebFilter(filterName = "druidWebStatFilter", urlPatterns = "/*", initParams = { // 忽略资源 @WebInitParam(name = "exclusions", value = "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*") } ) public class DruidStatFilter extends WebStatFilter { }
等应用启动后,可以访问地址:http://localhost:8080/druid/,登录之后,即可查看数据源及SQL统计等。
效果图如下:
官方地址
Spring Boot 使用 Druid
Spring Boot集成Druid数据库连接池
SPRING BOOT使用DRUID和监控配置方法
文章版权归作者所有,未经允许请勿转载,若此文章存在违规行为,您可以联系管理员删除。
转载请注明本文地址:https://www.ucloud.cn/yun/67055.html
摘要:看过的一些书上也是多数介绍了这两种数据库连接池,自己做的也是使用。参考资料文档首页文档问题阿里学习,号称最好的数据库连接池常用数据库连接池配置说明学习整合,使用连接池使用和监控配置数据源配置如果文章有错的地方欢迎指正,大家互相交流。 前言 本章节主要讲解Druid数据库连接池,为什么要学Druid数据库连接池呢?? 我的知识储备数据库连接池有两种->C3P0,DBCP,可是现在看起来并...
摘要:这篇文篇将介绍,如何通过整合数据库链接池实时监控数据库链接信息,为优化数据库性能提供更好的指导,同样将通过配置文件形式进行配置方便简洁。 这篇文篇将介绍,如何通过SpringBoot整合Druid数据库链接池,实时监控数据库链接信息,为优化数据库性能提供更好的指导,同样将通过YML配置文件形式进行配置,方便简洁。 准备工作 环境: windows jdk 8 maven 3.0 IDE...
摘要:当禁用时,所有关联对象都会即时加载。不同的驱动在这方便表现不同。参考驱动文档或充分测试两种方法来决定所使用的驱动。需要适合的驱动。系统默认值是设置字段和类是否支持驼峰命名的属性。 上篇文章我们介绍了SpringBoot和MyBatis的整合,可以说非常简单快捷的就搭建了一个web项目,但是在一个真正的企业级项目中,可能我们还需要更多的更加完善的框架才能开始真正的开发,比如连接池、分...
阅读 2178·2020-06-12 14:26
阅读 2480·2019-08-29 16:41
阅读 1886·2019-08-29 15:28
阅读 2450·2019-08-26 13:43
阅读 756·2019-08-26 13:37
阅读 2775·2019-08-23 18:13
阅读 2797·2019-08-23 15:31
阅读 1016·2019-08-23 14:10