package com.sanqing.util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class DBConnection {
private static final String DBDRIVER = "com.mysql.jdbc.Driver" ; //驱动类类名
private static final String DBURL = "jdbc:mysql://127.0.0.1:3306/javaweb_test";//连接URL
private static final String DBUSER = "username" ; //数据库用户名
private static final String DBPASSWORD = "pwd"; //数据库密码
public static Connection getConnection(){
Connection conn = null; //声明一个连接对象
try {
Class.forName(DBDRIVER); //注册驱动
conn = DriverManager.getConnection(DBURL,DBUSER,DBPASSWORD); //获得连接对象
} catch (ClassNotFoundException e) { //捕获驱动类无法找到异常
e.printStackTrace();
} catch (SQLException e) { //捕获SQL异常
e.printStackTrace();
}
return conn;
}
public static void close(Connection conn) {//关闭连接对象
if(conn != null) { //如果conn连接对象不为空
try {
conn.close(); //关闭conn连接对象对象
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void close(PreparedStatement pstmt) {//关闭预处理对象
if(pstmt != null) { //如果pstmt预处理对象不为空
try {
pstmt.close(); //关闭pstmt预处理对象
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void close(ResultSet rs) {//关闭结果集对象
if(rs != null) { //如果rs结果集对象不为null
try {
rs.close(); //关闭rs结果集对象
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}