springboot集成Druid

2019-11-06 09:14:17

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Druid是java平台上一个非常优秀的连接池，是阿里巴巴开源平台上的一个项目,整个项目由数据库连接池、插件框架和SQL解析器组成，能够提供强大的监控和扩展功能。创建maven项目并引入依赖

<parent> <groupId>org.sPRingframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.4.1.RELEASE</version> </parent> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <scope>test</scope> </dependency>  <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency>  <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.0.26</version> </dependency>  <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency>  <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> </dependency> </dependencies>

创建application.properties配置数据源相关信息

#数据库设置spring.datasource.type=com.alibaba.druid.pool.DruidDataSourcespring.datasource.driverClassName=com.mysql.jdbc.Driverspring.datasource.url=jdbc:mysql://localhost:3306/testspring.datasource.username=rootspring.datasource.passWord=root#--------------------------# 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spring.datasource.initialSize=5spring.datasource.minIdle=5spring.datasource.maxActive=20# 配置获取连接等待超时的时间spring.datasource.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.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.minEvictableIdleTimeMillis=300000spring.datasource.validationQuery=SELECT 1 FROM DUALspring.datasource.testWhileIdle=truespring.datasource.testOnBorrow=falsespring.datasource.testOnReturn=false# 打开PSCache，并且指定每个连接上PSCache的大小 spring.datasource.poolPreparedStatements=truespring.datasource.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 spring.datasource.filters=stat,wall,log4j# 通过connectProperties属性来打开mergeSql功能；慢SQL记录spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000# 合并多个DruidDataSource的监控数据#spring.datasource.useGlobalDataSourceStat=true

配置Filter

@WebFilter(filterName = "druidWebStatFilter", urlPatterns = "/*", initParams = { @WebInitParam(name = "exclusions", value = "*.js,*.gif,*.jpg,*.bmp,*.png,*.CSS,*.ico,/druid/*")// 忽略资源拦截})public class DruidStatFilter extends WebStatFilter {}

配置Servlet

@WebServlet(urlPatterns = "/druid/*", initParams = { @WebInitParam(name = "allow", value = ""), // ip白名单(没有配置或者为空，则允许所有访问) @WebInitParam(name = "deny", value = ""), // IP黑名单 (存在共同时，deny优先于allow) @WebInitParam(name = "loginUsername", value = "admin"), // 用户名 @WebInitParam(name = "loginPassword", value = "123"), // 密码 @WebInitParam(name = "resetEnable", value = "false")// 禁用HTML页面上的“Reset // All”功能})public class DruidStatViewServlet extends StatViewServlet { private static final long serialVersionUID = 1L;}

因为spring boot集成druid无法设置druid datasource属性，所以要配置数据源，这里相关的参数会自动赋值到datasource里。

@Configuration //等价与xml中配置beanspublic class DruidDataSourceConfiguration { @Bean @ConfigurationProperties(prefix = "spring.datasource") public DataSource druidDataSource(){ DataSource druidDataSource = new DruidDataSource(); return druidDataSource; }}

创建springboot启动类

@SpringBootApplication //集成@Configuration,@EnableAutoConfiguration,@ComponentScan三个注解@ServletComponentScan //使的spring能够扫描到我们自己编写的servlet和filter。public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); }}

启动项目，访问 localhost:8080/druid，输入账号：admin，密码：123（DruidStatViewServlet 里可自定义配置），即可查看druid提供的监控拦截等信息。

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