java – getResourceAsStream中的读取文件省略了换行符

2019年8月3日 117次阅读

我正在从getResourceAsStream读取资源,将所有文本添加到StringBuilder并将内容写入新文件.但是,文本没有换行.

当我这样做,但读取没有getResourceAsStream的文件,它完美地工作.

代码如下所示：

      InputStream styleFile = this.getClass().getResourceAsStream(
            "/path/path/path/some.css");

    BufferedReader bufRead = new BufferedReader(new InputStreamReader(styleFile));


    StringBuilder builder = new StringBuilder();
    int nextchar;
    while ((nextchar = bufRead.read()) != -1)
    {
       builder.append((char)nextchar);

    }
    FileWriter outFile;
    try
    {
       outFile = new FileWriter(newStyleFile);
    }
   catch (IOException e)
   {
      //Log
   }

   PrintWriter out = new PrintWriter(outFile);
   out.write(builder.toString());
   out.close();

最佳答案 如果您使用的是BufferedReader.readLine(),它会读取新行char的所有内容.新行字符不会附加到您获得的字符的末尾.它就像在新行字符上标记一样..对于BufferedReader.read()我不太清楚为什么新行被跳过. jdk源代码如下：

public int read() throws IOException {
synchronized (lock) {
    ensureOpen();
    for (;;) {
    if (nextChar >= nChars) {
        fill();
        if (nextChar >= nChars)
        return -1;
    }
    if (skipLF) {
        skipLF = false;
        if (cb[nextChar] == '\n') {
        nextChar++;
        continue;
        }
    }
    return cb[nextChar++];
    }
}
}

无论如何你的情况..编写一个输出新行的程序很简单…

BufferedReader br=new BufferedReader(new InputStreamReader(styleFile));
StringBuilder builder = new StringBuilder();
String line=null;
while((line=br.readline())!=null){
    builder.append(line).append("\n");
}

// then write to the new file...
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