c3p0連接池的配置

c3p0連接池的配置

c3p0連接池配置其實主要就是c3p0-config.xml文件的配置，以及c3p0的jar包的導入。

*配置c3p0-config.xml文件要注意兩點：

1.配置文件的命名一定不能改變，只能是“c3p0-config.xml”。

2.配置文件的存放位置只能在工程的src目錄下。

c3p0-config.xml代碼如下：

<span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8" ?>
<c3p0-config>
  <default-config>
    <property name="jdbcUrl">jdbc:oracle:thin:@127.0.0.1:1521:ORCL</property>
    <property name="driverClass">oracle.jdbc.driver.OracleDriver</property>
    <property name="user">【替換內容：用戶名】</property>
    <property name="password">【替換內容：密碼】</property>
    <property name="acquireIncrement">1</property>
    <property name="initialPoolSize">1</property>
    <property name="minPoolSize">1</property>
    <property name="maxPoolSize">5</property>
    <property name="maxIdleTime">120</property>
    <property name="acquireRetryAttempts">5</property>
    <property name="maxStatements">0</property>
    <property name="acquireRetryAttempts">10</property>
    <property name="checkoutTimeout">10000</property>
  </default-config>
</c3p0-config></span>

配置好文件後，測試一下配置文件是否有效：

<span style="font-size:18px;">package c3poTest;
import java.sql.Connection;
import java.sql.SQLException;

import com.mchange.v2.c3p0.ComboPooledDataSource;

public class Test {

	public static void main(String[] args) throws SQLException {
		ComboPooledDataSource cpds = new ComboPooledDataSource();
		Connection conn = cpds.getConnection();
		System.out.println(conn);
		conn.close();
	}
}</span>