首先创建一个jdbc.properties文件配置SQL信息
url=jdbc:mysql:///db1?serverTimezone=UTC
root=root
password=root
driver=com.mysql.cj.jdbc.Drive
创建一个工具类
private static String url;
private static String root;
private static String password;
private static String driver;
static {
try {
//读取配置文件
Properties pro = new Properties();
InputStream stream = JDBCUtils.class.getClassLoader().getResourceAsStream("JDBC.properties");
pro.load(stream);
url = pro.getProperty("url");
root = pro.getProperty("root");
password = pro.getProperty("password");
driver = pro.getProperty("driver");
//注册驱动
Class.forName(driver);
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
//获取连接方法
public static Connection getConnection() throws SQLException {
return DriverManager.getConnection(url, root, password);
}
//释放资源方法
public static void close(Statement st, Connection con) {
if (st != null) {
try {
st.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (con != null) {
try {
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void close(ResultSet rs, Statement st, Connection con) {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (st != null) {
try {
st.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (con != null) {
try {
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}