封装JDBC工具类代码
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ResourceBundle;
public class JDBCUtils {
// ResourceBundle读取配置文件
private static final ResourceBundle RB = ResourceBundle.getBundle("jdbc");
private static final String URL = RB.getString("url");
private static final String USERNAME = RB.getString("username");
private static final String PASSWORD = RB.getString("password");
static {
try {
Class.forName(RB.getString("driverClass"));
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
// 获取连接
public static Connection getConnection() throws SQLException {
return DriverManager.getConnection(URL, USERNAME, PASSWORD);
}
//关闭资源方法
public static void release(ResultSet rs, Statement stmt, Connection conn) {
if ( rs != null ) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if ( stmt != null ) {
try {
stmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if ( conn != null ) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) throws SQLException {
System.out.println(getConnection());
}
}