SpringBoot2默认的数据库连接池已经是HikariCP,所以不需要再配置,SpringBoot2版本之前的则需要配置
添加maven依赖
<!-- JDBC连接数据库,因为要用HikariCP,所以需要将SpringBoot中的tomcat-jdbc排除 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
<exclusions>
<exclusion>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jdbc</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- HikariCP 连接池依赖,从父依赖获取额版本 -->
<dependency>
<groupId>com.zaxxer</groupId>
<artifactId>HikariCP</artifactId>
<!-- <scope>runtime</scope> -->
</dependency>
添加配置
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test1?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
spring.datasource.username=root
spring.datasource.password=hongda$123456
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.max-idle=10
spring.datasource.max-active=15
spring.datasource.max-lifetime=86430000
spring.datasource.log-abandoned=true
spring.datasource.remove-abandoned=true
spring.datasource.remove-abandoned-timeout=60
spring.datasource.initialize=false
spring.datasource.sqlScriptEncoding=UTF-8
新建配置类DataSourceConfig.java
import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
/**
* HikariCP连接池配置
*/
@Configuration
public class DataSourceConfig {
@Value("${spring.datasource.url}")
private String dataSourceUrl;
@Value("${spring.datasource.username}")
private String user;
@Value("${spring.datasource.password}")
private String password;
@Bean
public DataSource dataSource() {
HikariConfig config = new HikariConfig();
/** 数据源 */
config.setJdbcUrl(dataSourceUrl);
/** 用户名 */
config.setUsername(user);
/** 密码 */
config.setPassword(password);
/** 是否自定义配置,为true时下面两个参数才生效 */
config.addDataSourceProperty("cachePrepStmts", "true");
/** 连接池大小默认25,官方推荐250-500 */
config.addDataSourceProperty("prepStmtCacheSize", "250");
/** 单条语句最大长度默认256,官方推荐2048 */
config.addDataSourceProperty("prepStmtCacheSqlLimit", "2048");
/** 新版本MySQL支持服务器端准备,开启能够得到显著性能提升 */
config.addDataSourceProperty("useServerPrepStmts", "true");
config.addDataSourceProperty("useLocalSessionState", "true");
config.addDataSourceProperty("useLocalTransactionState", "true");
config.addDataSourceProperty("rewriteBatchedStatements", "true");
config.addDataSourceProperty("cacheResultSetMetadata", "true");
config.addDataSourceProperty("cacheServerConfiguration", "true");
config.addDataSourceProperty("elideSetAutoCommits", "true");
config.addDataSourceProperty("maintainTimeStats", "false");
HikariDataSource ds = new HikariDataSource(config);
return ds;
}
}