printstudents2.java

图书馆座位管理系统

import java.io.RandomAccessFile;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import fileUtility.StudentsManagement;
import fileUtility.Student;
import java.io.PrintWriter;
import java.io.FileWriter;

public class PrintStudents2 {
    static String name0="赵钱孙李周吴郑王宋";
    static String name1="〇一二三四五六七八九 ";
    static String name2="甲乙丙丁戊己庚辛壬癸";
    static int studentNumber=10000;
    public static void main(String[] args) throws IOException {


        RandomAccessFile f = new RandomAccessFile("file" +File.separator +
                                                  "students2.txt", "rw");

//        PrintWriter p=new PrintWriter(new FileWriter("qwer.txt"));

        for (int i = 0; i < studentNumber; i++) {
            f.seek(i * 512);
            String name=""+name0.charAt(i%name0.length())+name1.charAt(i%name1.length())+name2.charAt(i%name2.length());
            int ID = (int) Math.abs(Math.random() * Integer.MAX_VALUE);

            f.writeChars(Integer.toString(ID));
//            f.writeChar('\t');
//            f.writeChar('\t');
            f.writeChars(name);
            f.writeChar('\t');
//            f.writeInt(ID);
//            f.writeUTF(name);
        }
        f.setLength(studentNumber*512);
      f.close();


//      new FriendsManagement();
//      printStudents_();
    }

    static void printStudents_(){
        Student students[]=StudentsManagement.students;
        System.out.println(students.length);
        for (int i = 0; i < students.length; i++) {
            System.out.println(students[i].ID+students[i].name);
        }
    }

}