java连接数据库工具类--DBConnection(java源码)

package com.hexiang.utils.dao; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.Properties; import javax.naming.Context; import javax.naming.InitialContext; import javax.naming.NamingException; import javax.sql.DataSource; import org.apache.log4j.Logger; public class DBConnection { /** * 获得与数据库的连接 * * @param path * @return Connection */ public static Connection getConn(String classDriver, String url, String user, String pwd) { try { Class.forName(classDriver); return DriverManager.getConnection(url, user, pwd); } catch (ClassNotFoundException ex) { ex.printStackTrace(); } catch (SQLException ex) { ex.printStackTrace(); } return null; } public static Connection getConn(DataSource dataSource) { try { return dataSource.getConnection(); } catch (SQLException ex) { ex.printStackTrace(); } return null; } public static Connection getConn(String jndiName) { try { Context ctx; ctx = new InitialContext(); DataSource dataSource = (DataSource) ctx.lookup("java:comp/env/" + jndiName); return dataSource.getConnection(); } catch (NamingException ex) { ex.printStackTrace(); } catch (SQLException ex) { ex.printStackTrace(); } return null; } public static Connection getConn(Properties properties) { try { String driver = properties.getProperty("jdbc.driverClassName"); String url = properties.getProperty("jdbc.url"); String user = properties.getProperty("jdbc.username"); String password = properties.getProperty("jdbc.password"); Class.forName(driver); return DriverManager.getConnection(url, user, password); } catch (ClassNotFoundException ex) { ex.printStackTrace(); } catch (SQLException ex) { ex.printStackTrace(); } return null; } /** * oracle连接 * * @param path * @return Connection */ public static Connection getOracleConn(String