问题描述
我希望我的代码读取一个 txt 文件并打印出每一行,但几乎一半的行似乎是随机跳过的。如何确保读取整个文件?
BufferedInputStream readIt = new BufferedInputStream(new FileInputStream(pBase));
//pBase is txt File object
Scanner actualRead = new Scanner(readIt);
while(actualRead.hasNextLine()){
System.out.println("Line is : " + actualRead.nextLine());
}
解决方法
最简单的方法是使用 nio 实用程序方法之一,例如 readAllLines
。
对于不想一次性全部加载到内存中的大文件,可以像这样使用 lines
方法:
import java.nio.file.Files;
import java.nio.file.Path;
...
try (var lines = Files.lines(Paths.get(pBase))) {
lines.forEach(l -> {
System.out.println(l);
});
}
,
或者..scanner 可以将文件参数作为输入...
Scanner actualRead = new Scanner(pBase); //directly pass the file as argument...
//Although this threatens to throw an IOException..catch it in try-catch or add to throws...
try {
Scanner actualRead = new Scanner(pBase);
while (actualRead.hasNextLine()) {
System.out.println("Line is : " + actualRead.nextLine());
}
catch (IOException e) {
System.out.println("err...");