java – 带有空行的缓冲读取器readLine()

我正在使用缓冲读取器从文本文件中一次抓取一行.我也试图使用跟踪整数从文本文件中获取行号.不幸的是BufferedReader正在跳过空行(只有/ n或回车).

有没有更好的方法来解决这个问题？会使用扫描仪吗？

示例代码：

int lineNumber = 0;
while ((s = br.readLine()) != null) {
    this.charSequence.add(s,++lineNumber);
}

解决方法

我无法重现你声称BufferedReader跳过空行;它应该没有.

以下是显示空行不仅仅被跳过的片段.

java.io.BufferedReader

String text = "line1\n\n\nline4";
    BufferedReader br = new BufferedReader(new StringReader(text));
    String line;
    int lineNumber = 0;
    while ((line = br.readLine()) != null) {
        System.out.printf("%04d: %s%n",++lineNumber,line);
    }

java.io.LineNumberReader

String text = "line1\n\n\nline4";
    LineNumberReader lnr = new LineNumberReader(new StringReader(text));
    String line;
    while ((line = lnr.readLine()) != null) {
        System.out.printf("%04d: %s%n",lnr.getLineNumber(),line);
    }

java.util.Scanner

String text = "line1\n\n\nline4";
    Scanner sc = new Scanner(text);
    int lineNumber = 0;
    while (sc.hasNextLine()) {
        System.out.printf("%04d: %s%n",sc.nextLine());
    }

以上任何代码段的输出是：

0001: line1
0002: 
0003: 
0004: line4

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