标签：highlight blog int source min junit init tcl 建立
1.C3P0数据源的使用
C3P0是一个开源的JDBC连接池，它实现了数据源和JNDI绑定，支持JDBC3规范和JDBC2的标准扩展。C3P0有自己的格式文件，如下
| <?xml version="1.0" encoding="UTF-8"?> <c3p0-config> <default-config> <property name="driverClass">com.mysql.jdbc.Driver</property> <property name="jdbcUrl">jdbc:mysql:///day05</property> <property name="user">root</property> <property name="password">root</property> <property name="initialPoolSize">10</property> <property name="maxIdleTime">30</property> <property name="maxPoolSize">100</property> <property name="minPoolSize">10</property> </default-config> </c3p0-config> |
package com.beiwo.day05.util;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.sql.DataSource;
import com.mchange.v2.c3p0.ComboPooledDataSource;
public class C3P0Util {
//C3P0数据源
private static ComboPooledDataSource dataSource=new ComboPooledDataSource();
public static DataSource getDataSource() {
return dataSource;
}
public static Connection getConn(){
try {
return dataSource.getConnection();
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
public static Connection getConn2(){
Connection conn=null;
try {
conn=dataSource.getConnection();
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
//释放连接
public static void realease(ResultSet rs,Statement stmt,Connection conn){
try {
if(null!=rs){
rs.close();
}
} catch (Exception e) {
// TODO: handle exception
}
try {
if(null!=stmt){
stmt.close();
}
} catch (Exception e) {
// TODO: handle exception
}
try {
if(null!=conn){
conn.close();
}
} catch (Exception e) {
// TODO: handle exception
}
}
}
測試C3P0的使用
package com.beiwo.day05.test;
import java.sql.Connection;
import org.junit.Test;
import com.beiwo.day05.util.C3P0Util;
public class TestC3P0 {
@Test
public void testC3P0(){
Connection connection = C3P0Util.getConn();
System.out.println(connection.getClass().getName());
C3P0Util.realease(null, null, connection);
}
}
标签：highlight blog int source min junit init tcl 建立
原文地址：http://www.cnblogs.com/houjiie/p/6192557.html
