java - 删除txt文件中以字符串开头的所有行？ ( java )

Question

对，假设我有以下格式的文件:

myFile.txt

姓名昵称；

杰伊史诗1;

杰伊史诗2;

现在假设我有String name = jay;。我想删除以字符串 name

开头的所有行

所以基本上，我想删除 txt 文件中以字符串开头的所有行。可能的？如果是的话，有人可以给我代码吗？ (我通过查看代码本身学到了最好的东西。)

谢谢，

杰伊

Answer 1

这是一种可能的实现:

    String name = "jay ";

    String source = "/path/to/original/file.txt";
    String dest = "/path/to/new/modified/file.txt";

    File fin = new File( source );
    FileInputStream fis = new FileInputStream( fin );
    BufferedReader in = new BufferedReader( new InputStreamReader( fis ) );

    FileWriter fstream = new FileWriter( dest, true );
    BufferedWriter out = new BufferedWriter( fstream );

    String aLine = null;
    while( ( aLine = in.readLine() ) != null ) {
        // Check each line for the string, and write if it doesn't have it:
        if( !aLine.startsWith(name) ) {
            out.write( aLine );
            out.newLine();
        }
    }

    in.close();
    out.close();