/*** @use 获取某张表的列名* @return ArrayList*/public ArrayList<String> getColumnNames(){ArrayList<String> tableNames = null;Connection con = null;Statement stmt = null;try {Class.forName("com.mysql.jdbc.Driver");con = DriverManager.getConnection("jdbc:mysql:///library", "root", "root");stmt = con.createStatement();ResultSet rs = stmt.executeQuery("SELECT *FROM library.book");ResultSetMetaData rsmd = rs.getMetaData();int count = rsmd.getColumnCount();tableNames = new ArrayList<String>(count);for(int i=0;i<count;i++){tableNames.add(rsmd.getColumnName(i + 1));// System.out.println(tableNames.get(i));}} catch (ClassNotFoundException | SQLException e) {e.printStackTrace();}return tableNames;}