我有这个:

for (String[] aZkratkyArray1 : zkratkyArray) {
    String oldString = " " + aZkratkyArray1[0] + " ";
    String firstString = aZkratkyArray1[0] + " ";
    String newString = " " + aZkratkyArray1[1] + " ";
    System.out.println(newString);
    System.out.println(fileContentsSingle);
    fileContentsSingle = fileContentsSingle.replaceAll(oldString, newString);
    if (fileContentsSingle.startsWith(firstString)) {
        fileContentsSingle = aZkratkyArray1[1] + " " + fileContentsSingle.substring(firstString.length(),fileContentsSingle.length());
    }
}


fileContentsSingle只是一些常规字符串,aZkratkyArray是带有缩短单词的数组,例如:


ht,你好
ru,你是谁


所以当fileContentsSingle = ht我是机器人
它应该结束:你好,我是机器人

或当fileContentsSingle =我是机器人hru
它应该结束:我是机器人,你是谁

但是当我在该迭代之后或在此过程中sysout fileContentsSingle时,字符串永远不会更改。

我尝试了replace和replaceAll,我尝试了可能想到的一切。

错误在哪里?

编辑:
这是我导入数组的方式:

        String[][] zkratkyArray;
        try {
            LineNumberReader lineNumberReader = new LineNumberReader(new FileReader("zkratky.csv"));
            lineNumberReader.skip(Long.MAX_VALUE);
            int lines = lineNumberReader.getLineNumber();
            lineNumberReader.close();

            FileReader fileReader = new FileReader("zkratky.csv");
            BufferedReader reader = new BufferedReader(fileReader);

            zkratkyArray = new String[lines + 1][2];
            String line;
            int row = 0;
            while ((line = reader.readLine()) != null) {
                String[] array = line.split(",");
                for (int i = 0; i < array.length; i++) {
                    zkratkyArray[row][i] = array[i];
                }
                row++;
            }
            reader.close();
            fileReader.close();
        } catch (FileNotFoundException e) {
            System.out.println("Soubor se zkratkami nenalezen.");
            zkratkyArray = new String[0][0];
        }

最佳答案

您的代码将针对“我是机器人”正确工作。如果在fileContentsSingle循环之后打印for,它将打印您希望打印的内容:

final String[][] zkratkyArray = new String[2][];
zkratkyArray[0] = new String[] { "ht", "hello there" };
zkratkyArray[1] = new String[] { "wru", "who are you" };

String fileContentsSingle = "ht I am robot";

for (String[] aZkratkyArray1 : zkratkyArray) {
    String oldString = " " + aZkratkyArray1[0] + " ";
    String firstString = aZkratkyArray1[0] + " ";
    String newString = " " + aZkratkyArray1[1] + " ";

    fileContentsSingle = fileContentsSingle.replaceAll(oldString, newString);
    if (fileContentsSingle.startsWith(firstString)) {
        fileContentsSingle = aZkratkyArray1[1] + " "
                + fileContentsSingle.substring(firstString.length(), fileContentsSingle.length());
    }
}

System.out.println(fileContentsSingle); // prints "hello there I am robot"


关于“我是机器人hru”,它将不起作用,因为“ hru”在String的末尾,并且后面没有空格,并且您要替换的String是“ hru”(在和后)。

由于不使用正则表达式,因此不需要replaceAll(),而可以使用replace()

使用正则表达式,您可以做一个更通用的解决方案,可在生产线中的任何地方工作:

final String[][] zkratkyArray = new String[2][];
zkratkyArray[0] = new String[] { "ht", "hello there" };
zkratkyArray[1] = new String[] { "wru", "who are you" };

String fileContentsSingle = "ht I am robot wru";

for (String[] aZkratkyArray1 : zkratkyArray) {
    fileContentsSingle = fileContentsSingle.replaceAll("\\b" + Pattern.quote(aZkratkyArray1[0]) + "\\b",
            Matcher.quoteReplacement(aZkratkyArray1[1]));
}

System.out.println(fileContentsSingle); // hello there I am robot who are you

08-15 21:46