1.Springboot 整合 druid
引入依賴：
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
</dependency>
java config 配置：
@Configuration
@EnableConfigurationProperties(DruidPropertityConfig.class)
public class DruidConfig {
// 日誌
private final Logger logger = LoggerFactory.getLogger(getClass());
@Autowired
private DruidPropertityConfig propertityConfig;
/**
* druid屬性配置 Springboot 默認使用org.apache.tomcat.jdbc.pool.DataSource數據源，默認配置如下：
* Springboot默認支持4種數據源類型，定義在
* org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
* 中，分別是： org.apache.tomcat.jdbc.pool.DataSource
* com.zaxxer.hikari.HikariDataSource org.apache.commons.dbcp.BasicDataSource
* org.apache.commons.dbcp2.BasicDataSource 對於這4種數據源，當 classpath
* 下有相應的類存在時，Springboot 會通過自動配置爲其生成DataSource Bean，DataSource
* Bean默認只會生成一個，四種數據源類型的生效先後順序如下：Tomcat--> Hikari --> Dbcp --> Dbcp2 。
* @return
*/
@Bean(name = "dataSource")
@Primary
public DataSource druidDataSource() {
logger.info("dataSource propertityConfig:{}", propertityConfig);
DruidDataSource dataSource = new DruidDataSource();
dataSource.setUrl(propertityConfig.getUrl());
dataSource.setUsername(propertityConfig.getUsername());
dataSource.setPassword(propertityConfig.getPassword());
dataSource.setDriverClassName(propertityConfig.getDriverClassName());
// configuration
dataSource.setInitialSize(propertityConfig.getInitialSize());
dataSource.setMinIdle(propertityConfig.getMinIdle());
dataSource.setMaxActive(propertityConfig.getMaxActive());
dataSource.setMaxWait(propertityConfig.getMaxWait());
dataSource.setTimeBetweenEvictionRunsMillis(propertityConfig.getTimeBetweenEvictionRunsMillis());
dataSource.setMinEvictableIdleTimeMillis(propertityConfig.getMinEvictableIdleTimeMillis());
dataSource.setTestWhileIdle(propertityConfig.isTestWhileIdle());
dataSource.setTestOnBorrow(propertityConfig.isTestOnBorrow());
dataSource.setTestOnReturn(propertityConfig.isTestOnReturn());
dataSource.setPoolPreparedStatements(propertityConfig.isPoolPreparedStatements());
dataSource.setMaxPoolPreparedStatementPerConnectionSize(
propertityConfig.getMaxPoolPreparedStatementPerConnectionSize());
dataSource.setValidationQuery(propertityConfig.getValidationQuery());
return dataSource;
}
/**
* 註冊一個druidStatViewServlet
*
* @return
*/
@Bean
public ServletRegistrationBean druidStatViewServlet() {
ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),
"/druid/*");
servletRegistrationBean.addInitParameter("allow", "*");
servletRegistrationBean.addInitParameter("loginUsername", "admin");
servletRegistrationBean.addInitParameter("loginPassword", "password");
servletRegistrationBean.addInitParameter("resetEnable", "false");
return servletRegistrationBean;
}
/**
* 註冊一個druidStatFilter
*
* @return
*/
@Bean
public FilterRegistrationBean druidStatFilter() {
FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
filterRegistrationBean.addUrlPatterns("/*");
filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
return filterRegistrationBean;
}
}
配置屬性：
@ConfigurationProperties(prefix = "jdbc.datasource")
@Data
public class DruidPropertityConfig {
private String driverClassName;
private String url;
private String username;
private String password;
private int initialSize;
private int minIdle;
private int maxActive;
private int maxWait;
private int timeBetweenEvictionRunsMillis;
private int minEvictableIdleTimeMillis;
private boolean testWhileIdle;
private boolean testOnBorrow;
private boolean testOnReturn;
private boolean poolPreparedStatements;
private int maxPoolPreparedStatementPerConnectionSize;
private String filters;
private String validationQuery;
}
application.yml
jdbc:
datasource:
driverClassName: com.mysql.cj.jdbc.Driver
url: jdbc:mysql:XXXX
username: xxxx
password: xxxx
#初始連接數
initialSize: 20
#最小空閒連接數
minIdle: 20
最大連接池數量
maxActive: 100
#獲取鏈接超時時間
maxWait: 60000
#每30秒運行一次空閒連接回收器
timeBetweenEvictionRunsMillis: 30000
#池中的連接空閒30分鐘後被回收
minEvictableIdleTimeMillis: 1800000
#此項配置爲true即可，不影響性能，並且保證安全性。意義爲：申請連接的時候檢測，如果空閒時間大於timeBetweenEvictionRunsMillis，執行validationQuery檢測連接是否有效
testWhileIdle: true
#獲取鏈接的時候，不校驗是否可用，開啓會有損性能
testOnBorrow: false
#歸還鏈接到連接池的時候校驗鏈接是否可用
testOnReturn: false
#開啓遊標緩存（mysql不建議開啓）
#poolPreparedStatements: true
#maxPoolPreparedStatementPerConnectionSize: 100
filters: stat,wall,slf4j
#檢測數據庫鏈接是否有效，必須配置
validationQuery: select 1
常用數據庫validationQuery檢查語句
| 數據庫 | validationQuery |
| Oracle | select 1 from dual |
| mysql | select 1 |
| DB2 | select 1 from sysibm.sysdummy1 |
| microsoft sql | select 1 |
| hsqldb | select 1 from INFORMATION_SCHEMA.SYSTEM_USERS |
| postgresql | select version() |
| ingres | select 1 |
| derby | select 1 |
| H2 | select 1 |
基本配置參數說明：
