Question

这是我的文本文件＆＃34; demo.txt＆＃34;。我必须读取值值并分配变量，如成功规则，产品对象......

import java.io.*;
import java.util.*;
public class Read {
    public static void main(String[] args) throws Exception {
        File file=new File("demo.txt");
        Scanner s=new Scanner(file);
        while(s.hasNextLine()) {
            String rule=s.next();
            System.out.println(rule);
        }
    }
}

这里只是想要打印规则成功然后做什么：

成功
产品

如果产品的价格大于100且数量小于2且类别为＆＃34;杂货店＆＃34;然后
打印折扣等于100
然后显示折扣为100

Answer 1

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

/**
 *
 * Java program to read file using Scanner class in Java.
 * java.util.Scanner is added on Java 5 and offer convenient method to read data
 *
 * @author
 */
public class ScannerExample {

    public static void main(String args[]) throws FileNotFoundException {

        //creating File instance to reference text file in Java
        File text = new File("C:/temp/test.txt");

        //Creating Scanner instnace to read File in Java
        Scanner scnr = new Scanner(text);

        //Reading each line of file using Scanner class
        int lineNumber = 1;
        while(scnr.hasNextLine()){
            String line = scnr.nextLine();
            System.out.println("line " + lineNumber + " :" + line);
            lineNumber++;
        }      

    }  

}

了解详情：http://www.java67.com/2012/11/how-to-read-file-in-java-using-scanner-example.html#ixzz4fWXsFF00

如何使用扫描仪从文本文件中读取值并为其分配变量？

1 个答案: