读取txt文件并用换行符显示数据

Question

这是我读取 txt 文件的代码，但我似乎无法正确安排文件内容的输出。

这是文件内容：

venti lador 13 male taguig

pito dingal 26 male pateros

dony martinez 24 male hagonoy

package testprojects;

import java.io.BufferedReader;
import java.io.FileReader;

public class ReadTextFile {
    public static void main(String args[]) throws Exception {
        BufferedReader bf = new BufferedReader(new FileReader("C://Users/PAO/Desktop/sampletxt.txt"));
        String line;

        while ((line = bf.readLine()) != null) {
            String[] value = line.split(" ");

            for (int x = 0; x < value.length; x++) {
                if (x >= 5) {
                    System.out.println();
                }
                System.out.print(value[x] + " ");
            }
        }
    }
}

输出：

venti lador 13 male taguig pito dingal 26 male pateros dony martinez 24 male hagonoy

期望的输出：

venti lador 13 male taguig

pito dingal 26 male pateros

dony martinez 24 male hagonoy

Answer 1

将您的条件更改为

if((x + 1) % 5 == 0 || (x == value.length - 1))

这样它会在每 5 个数据处或当您到达行的最后一个数据时跳过一行。

你会得到这样的结果：

System.out.print(value[x] + " " );
if((x + 1) % 5 == 0 || (x == value.length - 1))
    System.out.println();

Answer 2

您不需要 if 语句来换行，只需将 println() 放在 for 循环之后即可。

public static void main(String[] args) throws Exception {    
    BufferedReader bf = new BufferedReader(new FileReader("C://Users/PAO/Desktop/sampletxt.txt"));

    String line;

    while((line=bf.readLine())!=null){
        String[] value=line.split(" ");

        for (String value1 : value) {
            System.out.print(value1 + " ");
        }
        System.out.println(""); // Goes to the next line after printing all values
    }
}

如果您希望每行有一定数量的值（例如 5 个），请尝试以下操作：

public static void main(String[] args) throws Exception {    
    BufferedReader bf = new BufferedReader(new FileReader("C://Users/PAO/Desktop/sampletxt.txt"));

    String line;

    int count = 0;
    while((line=bf.readLine())!=null){
        String[] value=line.split(" ");

        for (String value1 : value) {
            System.out.print(value1 + " ");
            count++;

            if (count == 5) { // Five values per line before a line break
                System.out.println("");
                count = 0;
            }
        }
    }
}

如果您只是打印出文件中的内容，我不明白您为什么必须执行拆分。您在单个 space 上拆分，然后在每个值之间用 space 打印回值。只需打印从文件中读取的行。

public static void main(String[] args) throws Exception {    
    BufferedReader bf = new BufferedReader(new FileReader("C://Users/PAO/Desktop/sampletxt.txt"));

    String line;
    while((line=bf.readLine())!=null){
        System.out.println(line);
    }
}

读取txt文件并用换行符显示数据

Reading txt files and display the data with a line break

java

readable