Question

我有两个文本文件，

A.TXT
b.txt

每个文本文件都包含一些文件路径。 b.txt包含的文件路径比a.txt多一些。我想确定添加哪些路径以及从a.txt中删除哪些路径，以使其与b.txt中的路径相对应。

例如，

abc.txt包含

E:\Users\Documents\hello\a.properties
E:\Users\Documents\hello\b.properties
E:\Users\Documents\hello\c.properties

和xyz.txt包含

E:\Users\Documents\hello\a.properties
E:\Users\Documents\hello\c.properties
E:\Users\Documents\hello\g.properties
E:\Users\Documents\hello\h.properties

现在如何找到添加g.prop和h.prop并删除b.prop？

有谁可以解释它是如何完成的？我只能找到如何检查相同的内容。

Answer 1

以下代码将用于您的目的，无论文件的内容如何。

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

    public class Test {
        public Test(){
            System.out.println("Test.Test()");
        }

        public static void main(String[] args) throws Exception {
            BufferedReader br1 = null;
            BufferedReader br2 = null;
            String sCurrentLine;
            List<String> list1 = new ArrayList<String>();
            List<String> list2 = new ArrayList<String>();
            br1 = new BufferedReader(new FileReader("test.txt"));
            br2 = new BufferedReader(new FileReader("test2.txt"));
            while ((sCurrentLine = br1.readLine()) != null) {
                list1.add(sCurrentLine);
            }
            while ((sCurrentLine = br2.readLine()) != null) {
                list2.add(sCurrentLine);
            }
            List<String> tmpList = new ArrayList<String>(list1);
            tmpList.removeAll(list2);
            System.out.println("content from test.txt which is not there in test2.txt");
            for(int i=0;i<tmpList.size();i++){
                System.out.println(tmpList.get(i)); //content from test.txt which is not there in test2.txt
            }

            System.out.println("content from test2.txt which is not there in test.txt");

            tmpList = list2;
            tmpList.removeAll(list1);
            for(int i=0;i<tmpList.size();i++){
                System.out.println(tmpList.get(i)); //content from test2.txt which is not there in test.txt
            }
        }
    }

Answer 2

你可以简单地按照

import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;

public class Test {
    public static void main(final String[] args) throws IOException {
        final Path firstFile = Paths.get("/home/src/main/resources/a.txt");
        final Path secondFile = Paths.get("/home/src/main/resources/b.txt");
        final List<String> firstFileContent = Files.readAllLines(firstFile,
            Charset.defaultCharset());
        final List<String> secondFileContent = Files.readAllLines(secondFile,
            Charset.defaultCharset());

        System.out.println(diffFiles(firstFileContent, secondFileContent));
        System.out.println(diffFiles(secondFileContent, firstFileContent));
    }

    private static List<String> diffFiles(final List<String> firstFileContent,
        final List<String> secondFileContent) {
        final List<String> diff = new ArrayList<String>();
        for (final String line : firstFileContent) {
            if (!secondFileContent.contains(line)) {
                diff.add(line);
            }
        }
        return diff;
    }
}

想要使用java

2 个答案: