java - 读取文件中的特定信息

Question

我想用Scanner读取这个文件，但不是全部信息，只有分号后面的东西，比如10、warrior、John Smith等等。

currhp: 10

type: Warrior

name: John Smith

items:
      Stick,1,2,10,5

gold: 10

type: Wizard

我尝试解决这个问题，但没有成功。

Scanner infile;

Scanner inp = new Scanner(System.in);

try {

 infile =    new Scanner(new File("player_save.txt"));

} catch    (FileNotFoundException o) {

 System.out.println(o); return; }

while (infile.hasNextLine()) { 

System.out.println(infile.nextLine()); 

}

Answer 1

您需要打开文件，逐行读取，然后分割每一行并使用您希望对其进行进一步处理的行 block 。

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class ReadFile{
    public static void main(String[] args) throws IOException {
        //fix the URL to where your file is located.
        try (BufferedReader br = new BufferedReader(new FileReader("C:\\player_save.txt"))) {
            String line;
            while ((line = br.readLine()) != null) {
                if(line.length() > 0) {
                      if(line.contains(":")) {
                          System.out.println("Before colon >> " + line.split(":")[0]);  
                       } else {
                          //no column found taking the whole line
                         System.out.println("whole line having no coln: " + line);                    
                     }
                }
            }
        } catch(FileNotFoundException fnfe) {   
          //Handle scenario where the file does not exist   
        } catch(IOException ie) {
          //Handle other File I/O exceptions here
        }
    }
}