将换行符写入文件 [英] write newline into a file

问题描述

考虑以下函数

private static void GetText(String nodeValue) throws IOException {

   if(!file3.exists()) {
       file3.createNewFile();
   }

   FileOutputStream fop=new FileOutputStream(file3,true);
   if(nodeValue!=null)
       fop.write(nodeValue.getBytes());

   fop.flush();
   fop.close();

}

添加什么以使其每次都写入下一行？

what to add to make it to write each time in the next line?

例如我想要一个单独的lline中给定字符串的每个单词，例如：

for example i want each words of a given string in a seperate lline for example:

i am mostafa

写道：

 i
 am
 mostafa

推荐答案

要将文本（而不是原始字节）写入文件，您应该考虑使用 FileWriter 。您还应该将其包装在 BufferedWriter 中然后会给你 newLine 方法。

To write text (rather than raw bytes) to a file you should consider using FileWriter. You should also wrap it in a BufferedWriter which will then give you the newLine method.

要在新行上写下每个单词，请使用 String.split 将文本分成几个单词。

To write each word on a new line, use String.split to break your text into an array of words.

所以这里是对您的要求的简单测试：

So here's a simple test of your requirement:

public static void main(String[] args) throws Exception {
    String nodeValue = "i am mostafa";

    // you want to output to file
    // BufferedWriter writer = new BufferedWriter(new FileWriter(file3, true));
    // but let's print to console while debugging
    BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(System.out));

    String[] words = nodeValue.split(" ");
    for (String word: words) {
        writer.write(word);
        writer.newLine();
    }
    writer.close();
}

输出为：

i
am
mostafa

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