idea 使用c3p0教程
时间: 2023-07-02 15:18:10 浏览: 239
以下是使用 C3P0 连接池来配置 IDEA 连接数据库的步骤:
1. 在 Maven 项目中添加 C3P0 依赖
在项目的 pom.xml 文件中添加以下 C3P0 依赖:
```xml
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.5</version>
</dependency>
```
2. 在项目的 src/main/resources 目录下创建 c3p0-config.xml 文件
在该文件中配置 C3P0 连接池的参数,例如:
```xml
<c3p0-config>
<default-config>
<property name="jdbcUrl">jdbc:mysql://localhost:3306/test</property>
<property name="driverClass">com.mysql.jdbc.Driver</property>
<property name="user">root</property>
<property name="password">root</property>
<property name="acquireIncrement">5</property>
<property name="initialPoolSize">10</property>
<property name="minPoolSize">5</property>
<property name="maxPoolSize">20</property>
<property name="maxIdleTime">3600</property>
</default-config>
</c3p0-config>
```
3. 在代码中使用 C3P0 连接池
在代码中使用以下代码来获取连接:
```java
import com.mchange.v2.c3p0.ComboPooledDataSource;
import java.sql.Connection;
import java.sql.SQLException;
public class Main {
public static void main(String[] args) {
ComboPooledDataSource cpds = new ComboPooledDataSource();
try {
Connection conn = cpds.getConnection();
// do something with the connection
} catch (SQLException e) {
e.printStackTrace();
} finally {
cpds.close();
}
}
}
```
以上就是使用 C3P0 连接池来配置 IDEA 连接数据库的步骤。
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