Question

我正在尝试逐行读取多个分隔符的文件。我使用正则表达式进行拆分，但不考虑空格（＆＃34;＆＃34;）作为分隔符。文件包含;，＃，,,和空格作为分隔符。我究竟做错了什么？文件行看起来像这样 - 添加R1，R2，R3

public static void initialize() throws IOException {
    PC = 4000;
    BufferedReader fileReader = new BufferedReader(new FileReader("test/ascii.txt"));
    String str;
    while((str = fileReader.readLine()) != null){
        Instruction instruction = new Instruction();
        String[] parts = str.split("[ ,:;#]");
        instruction.instrAddr = String.valueOf(PC++);
        System.out.println(instruction.instrAddr);
        instruction.opcode = parts[0];
        System.out.println(instruction.opcode);
        instruction.dest = parts[1];
        System.out.println(instruction.dest);
        instruction.source_1 = parts[2];
        System.out.println(instruction.source_1);
        instruction.source_2 = parts[3];
        System.out.println(instruction.source_2);    
    }
    fileReader.close();}

输出打印4000（PC值），ADD，R1，＆＃34; ＆＃34;和R2。如何避免空间？正则表达式str.split有什么问题（＆＃34; [，：;＃]＆＃34;）; ？

Answer 1

你确定那些实际上是空格吗？

这适用于任何空白区域：

<tbody>
                                        <?php foreach ($journal_list as $journal): ?>
                                            <tr>
                                                <td style=""><a href="{{ url('journal/' . $journal->id) }}">{{ $journal->title }}</a></td>

                                                @if (Auth::check())
                                                <td style="width: 130px; overflow: hidden;">
                                                    <div class="box-button">
                                                        {{ link_to('journal/' . $journal->id . '/edit?edition=' . $edition->id, 'Edit', ['class' => 'btn btn-warning btn-sm']) }}
                                                    </div>
                                                    <div class="box-button">
                                                        {!! Form::open(['method' => 'DELETE', 'action' => ['JournalController@destroy', $journal->id]]) !!}
                                                        {!! Form::submit('Delete', ['class' => 'btn btn-danger btn-sm']) !!}
                                                        {!! Form::close() !!}
                                                    </div>
                                                </td>
                                                @endif

                                            </tr>
                                        <?php endforeach ?>
                                    </tbody>

在java

1 个答案: