Java读入单个文件并写出多个文件

Question

我想编写一个简单的 java 程序来读取文本文件，然后在检测到空白行时写出一个新文件。我看过读取文件的示例，但我不知道如何检测空行并输出多个文本文件。

文件输入.txt:

line1
line2

line3

fileOut1.txt:

line1
line2

fileOut2.txt:

line3

Answer 1

以防万一您的文件有特殊字符，也许您应该指定编码。

FileInputStream inputStream = new FileInputStream(new File("fileIn.txt"));
InputStreamReader streamReader = new InputStreamReader(inputStream, "UTF-8");
BufferedReader reader = new BufferedReader(streamReader);
int n = 0;
PrintWriter out = new PrintWriter("fileOut" + ++n + ".txt", "UTF-8");
for (String line;(line = reader.readLine()) != null;) {
    if (line.trim().isEmpty()) {
        out.flush();
        out.close();
        out = new PrintWriter("file" + ++n + ".txt", "UTF-8");
    } else {
        out.println(line);
    }
}
out.flush();
out.close();
reader.close();
streamReader.close();
inputStream.close();