public class DBUtil {
    public static void close(Connection conn) {
        close(conn, null, null);
    }
    public static void close(Connection conn, Statement stmt, ResultSet resultSet) {
        if (resultSet != null) {
            try {
                resultSet.close();
            } catch (Exception ignored) {}
        }
        if (stmt != null) {
            try {
                stmt.close();
            } catch (Exception ignored) {}
        }
        if (conn != null) {
            try {
                conn.close();
            } catch (Exception ignored) {}
        }
    }
}

public void sqliteJDBCDemo() {
    Connection conn = null;
    try {
        // 1. 驱动
        Class.forName("org.sqlite.JDBC");
        // 2. 打开连接
        conn = DriverManager.getConnection("jdbc:sqlite:e:/data/student.sqlite3");

        // 3. 操作
        Statement statement = conn.createStatement();
        ResultSet resultSet = statement.executeQuery("select name, weixin, score from student");
        while (resultSet.next()) {
            System.out.printf("Name: %s, Weixin: %s, Score: %f\n",
                    resultSet.getString(1),
                    resultSet.getString(2),
                    resultSet.getFloat(3));
        }
    } catch (ClassNotFoundException e) {
        System.out.println("1. 驱动加载失败");
    } catch (SQLException e) {
        System.out.println("2. 数据库异常");
    } finally {
        // 4. 释放资源
        if (conn != null)
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
    }
}