JDBC连接数据库(MySQL)

package com.dao;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DbManager {

private static String URL = "jdbc:mysql://localhost:3306/sales";//sales是数据库名
private static String USER = "root";
private static String PWD = "root";
public static Connection getConn(){
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(URL,USER,PWD);
} catch (SQLException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
return conn;
}

public static void closeAll(Connection conn,Statement ste,ResultSet rs){
if(rs != null){
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(ste !=null){
try {
ste.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(conn !=null){
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}

}