如何删除包含在特定字符串后开始并以在Java文件中找到的字符结尾的字符的行？

Question

我有一个包含abc.txt的文件

abc.txt

hhjj

myhome _ dfdfdsfds fdsfds

dfdfdsfdsd fdsfdsf dfdfdsfdsdfdsfd

dfdsfds

dfdsfds _

hhhh j kkkk

myhome之后的字符可以是任何字符，可以是特殊字符，字母或数字。我需要找到myhome之后的字符，并删除中间的以字符结尾的行。在我的文件中，我在myhome之后用''表示为''。

输出应为

abc.txt

hhjj

hhhh j kkkk

我已经尝试过如何逐行读取文件

package test;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

public class ReadStringFromFileLineByLine {

public static void main(String[] args) {
    try {
        File file = new File("abc.txt");
        FileReader fileReader = new FileReader(file);
        BufferedReader bufferedReader = new BufferedReader(fileReader);
        StringBuffer stringBuffer = new StringBuffer();
        String line;
        while ((line = bufferedReader.readLine()) != null) {
            stringBuffer.append(line);
            stringBuffer.append("\n");
        }
        fileReader.close();
        System.out.println("Contents of file:");
        System.out.println(stringBuffer.toString());
    } catch (IOException e) {
        e.printStackTrace();
    }
}

}

谁能帮忙??

Answer 1

结构

App.java

package main;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.util.Scanner;

public class App {

    public static void main(String[] args) 
    throws FileNotFoundException, UnsupportedEncodingException {
        App app = new App();
        app.parseFile();
    }

    void parseFile() throws FileNotFoundException, UnsupportedEncodingException {
        // Reading from package main
        File file = new File(getClass().getResource("/main/abc.txt").getFile());
        // If you want to read from HDD, for example :
        // File file = new File("/home/user/abc.txt"); or File file = new File("c:\\abc.txt");
        Scanner input = new Scanner(file);
        StringBuilder sb = new StringBuilder();
        while (input.hasNextLine()) {
            sb.append(input.nextLine());
            sb.append("\n");
        }
        input.close();
        String text = sb.toString();
        text = text
            .replace(
                text.substring(
                    text.indexOf("myhome _"),
                    text.lastIndexOf('_')+1
                ),
                ""
            )
            .replace("\n\n", "\n");
        Path newFile = Paths.get("abc_new.txt");
        Files.write(newFile, Arrays.asList(text.split("\n")), Charset.forName("UTF-8"));
    }
}

新的书面文件将位于项目文件夹中。