jdbc连接dbcp和c3p0

╰半夏微凉° 2022-08-13 13:57 166阅读 0赞

package dbcp;
    
    import java.sql.Connection;
    import java.sql.SQLException;
    
    import org.apache.commons.dbcp2.BasicDataSource;
    import org.junit.Test;
    
    /**
     * dbcp
     * @author zzh
     *
     */
    public class Demo {
    	@Test
    	public void fun() throws SQLException{
    		BasicDataSource dataSource  =new BasicDataSource();
    		
    		dataSource.setDriverClassName("com.mysql.jdbc.Driver");
    		dataSource.setUrl("jdbc:mysql://localhost:3306/mydb1");
    		dataSource.setUsername("root");
    		dataSource.setPassword("123");
    		
    		dataSource.setMaxWaitMillis(1000);
    		dataSource.setMinIdle(3);
    		dataSource.setMaxTotal(20);
    		
    		Connection con = dataSource.getConnection();
    		System.out.println(con.getClass().getName());
    		
    		con.close(); //把连接归还给池
    	}
    }

<pre name="code" class="html"><?xml version="1.0" encoding="UTF-8" ?>
    <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">123</property>
    		
    		<property name="acquireIncrement">3</property>
    		<property name="initialPoolSize">10</property>
    		<property name="minPoolSize">2</property>
    		<property name="maxPoolSize">10</property>
    	</default-config>
    </c3p0-config>

package c3p0;
    
    import java.beans.PropertyVetoException;
    import java.sql.Connection;
    import java.sql.SQLException;
    
    import org.junit.Test;
    
    import com.mchange.v2.c3p0.ComboPooledDataSource;
    
    /**
     * c3p0
     * @author zzh
     *
     */
    public class C3p0Demo {
    	@Test
    	public void fun() throws PropertyVetoException, SQLException{
    		ComboPooledDataSource dataSource = new ComboPooledDataSource();
    		//四大参数
    		dataSource.setDriverClass("com.mysql.jdbc.Driver");
    		dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/mydb1");
    		dataSource.setUser("root");
    		dataSource.setPassword("123");
    		//设置参数
    		dataSource.setAcquireIncrement(5);
    		dataSource.setInitialPoolSize(20);
    		dataSource.setMaxPoolSize(30);
    		dataSource.setMinPoolSize(2);
    		
    		Connection con = dataSource.getConnection();
    		System.out.println(con);
    		con.close();
    	}
    	
    	/**
    	 * 配置文件连接
    	 * 位子：src下   名字：c3p0-cofig.xml
    	 * @throws SQLException
    	 */
    	@Test
    	public void fun2() throws SQLException{
    		ComboPooledDataSource dataSource = new ComboPooledDataSource();
    		
    		Connection con = dataSource.getConnection();
    		System.out.println(con);
    		con.close();
    
    	}
    }