Foreword:
DBPool It is an efficient and easy-to-configure database connection pool, which supports JDBC 4.2, but it is no longer maintained at present; This paper briefly introduces the use of DBPool. The software versions used in this paper are Java 1.8.0_191, DBPool 7.0. 1, Spring Boot 2.3. 12. RELEASE.
1. Configuration parameters
| 参数 | 描述 |
| name | 连接池名称 |
| description | 描述 |
| driverClassName | 驱动名称 |
| url | 连接 url |
| user | 用户名 |
| password | 密码 |
| passwordDecoderClassName | 密码解密类名，需实现 snaq.db.PasswordDecoder 接口，需要有无参构造方法 |
| minPool | 连接池最小连接数 |
| maxPool | 连接池最大连接数 |
| maxSize | 可以创建的最大连接数 |
| idleTimeout | 空闲连接数最大存活时间(秒)，0 表示无限制 |
| loginTimeout | 创建连接的超时时间(秒) |
| validatorClassName | 校验类名，需实现 snaq.db.ConnectionValidator 接口，需要有无参构造方法 |
| validatorQuery | 校验查询语句 |
For detailed explanation, please refer to the official website document: https://www.snaq.net/software/dbpool/
2. Use
2.1. Direct use
2.1. 1, Introducing dependencies
<dependency>
<groupId>net.snaq</groupId>
<artifactId>dbpool</artifactId>
<version>7.0.1</version>
</dependency>2.1. 2. Use examples
package com.abc.demo.general.dbpool;
import snaq.db.DBPoolDataSource;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class DBPoolCase {
public static void main(String[] args) {
DBPoolDataSource dbPoolDataSource = new DBPoolDataSource();
dbPoolDataSource.setName("DBPool Connection pool ");
dbPoolDataSource.setDescription("DBPool Connection pool test ");
dbPoolDataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
dbPoolDataSource.setUrl("jdbc:mysql://10.40.9.11:3306/mydb?useUnicode=true&characterEncoding=UTF-8");
dbPoolDataSource.setUser("root");
dbPoolDataSource.setPassword("123456");
dbPoolDataSource.setMinPool(5);
dbPoolDataSource.setMaxPool(10);
dbPoolDataSource.setMaxSize(30);
dbPoolDataSource.setIdleTimeout(3600);
dbPoolDataSource.setLoginTimeout(60);
dbPoolDataSource.setValidationQuery("select 1");
Connection connection = null;
try {
connection = dbPoolDataSource.getConnection();
Statement st = connection.createStatement();
ResultSet rs = st.executeQuery("select version()");
if (rs.next()) {
System.out.println(rs.getString(1));
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
close(connection);
}
// In actual use 1 Generally, the data source is initialized when the application starts, and the application obtains the connection from the data source; The data source is not closed.
dbPoolDataSource.release();
}
private static void close(Connection connection) {
if (connection != null) {
try {
connection.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}2.2. Used in SpringBoot
2.1. 1, Introducing dependencies
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.12.RELEASE</version>
<relativePath />
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
<dependency>
<groupId>net.snaq</groupId>
<artifactId>dbpool</artifactId>
<version>7.0.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
</dependencies>2.1. 2, single data source
application. yml configuration:
spring:
datasource:
dbpool:
name: DBPool Connection pool
description: DBPool Connection pool test
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://10.40.9.11:3306/myDb?useUnicode=true&characterEncoding=UTF-8
user: root
password: 123456
min-pool: 5
max-pool: 10
max-size: 30
idle-timeout: 3600
login-timeout: 60
validator-query: select 1Data source configuration class:
package com.abc.demo.config;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import snaq.db.DBPoolDataSource;
import javax.sql.DataSource;
@Configuration
public class DataSourceConfig {
@Bean("dataSource")
@ConfigurationProperties(prefix = "spring.datasource.dbpool")
public DataSource dataSource() {
return DataSourceBuilder.create().type(DBPoolDataSource.class).build();
}
}Use:
@Autowired
private DataSource dataSource;2.1. 3, Multiple Data Sources
application. yml configuration:
spring:
datasource:
dbpool:
db1:
name: DBPool Connection pool 1
description: DBPool Connection pool test 1
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://10.40.9.11:3306/mydb?useUnicode=true&characterEncoding=UTF-8
user: root
password: 123456
min-pool: 5
max-pool: 10
max-size: 30
idle-timeout: 3600
login-timeout: 60
validator-query: select 1
db2:
name: DBPool Connection pool 2
description: DBPool Connection pool test 2
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://10.40.9.12:3306/mydb?useUnicode=true&characterEncoding=UTF-8
user: root
password: 123456
min-pool: 5
max-pool: 10
max-size: 30
idle-timeout: 3600
login-timeout: 60
validator-query: select 1Data source configuration class:
package com.abc.demo.config;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import snaq.db.DBPoolDataSource;
import javax.sql.DataSource;
@Configuration
public class DataSourceConfig {
@Bean("dataSource1")
@ConfigurationProperties(prefix = "spring.datasource.dbpool.db1")
public DataSource dataSource1() {
return DataSourceBuilder.create().type(DBPoolDataSource.class).build();
}
@Bean("dataSource2")
@ConfigurationProperties(prefix = "spring.datasource.dbpool.db2")
public DataSource dataSource2() {
return DataSourceBuilder.create().type(DBPoolDataSource.class).build();
}
}Use:
@Autowired
@Qualifier("dataSource1")
private DataSource dataSource1;
@Autowired
@Qualifier("dataSource2")
private DataSource dataSource2;