c3po-test

導入c3p0-0.9.5.2.jar、mchange-commons-java-0.2.11.jar、mysql-connector-java-8.0.17.jar

 

1.c3p0-config.xml：

 

<?xml version="1.0" encoding="utf-8" ?>

<c3p0-config>
    <default-config>
        <property name="user"></property>
        <property name="password"></property>
        <property name="driverClass">com.mysql.jdbc.Driver</property>
        <property name="jdbcUrl">jdbc:mysql://localhost:3306</property>
    </default-config>
</c3p0-config>

 

2.utils：

 

public class utils {    private static DataSource dataSource = new ComboPooledDataSource();    private static ThreadLocal<Connection> threadLocal = new ThreadLocal<Connection>();    public static Connection getConnection() throws SQLException {        Connection connection = threadLocal.get();        if (connection == null) {            connection = dataSource.getConnection();            threadLocal.set(connection);        }        return connection;    }}