java课程设计.zip

package student; import java.io.File; import java.io.FileWriter; import java.io.IOException; import java.util.Objects; import java.util.Scanner; /* * 业务类 Manage * 主要处理各种业务 * */ public class Manage { int length = 0; Student[] students = new Student[10]; Scanner input = new Scanner(System.in); public Manage() {} public void login(){ Scanner sc=new Scanner(System.in); System.out.println("请输入用户名"); while (!Objects.equals(sc.next(), "123456")){ System.out.println("用户名错误错误！请重新输入"); } Scanner sc1=new Scanner(System.in); System.out.println("请输入密码"); while (!Objects.equals(sc.next(), "123456")){ System.out.println("密码错误！请重新输入"); } } //添加记录方法 public void add() { students[length] = new Student(); System.out.print("请输入学生的学号： "); students[length].setNum(input.next()); System.out.print("请输入学生的姓名："); students[length].setName(input.next()); System.out.print("请输入学生的性别："); students[length].setSex(input.next()); System.out.print("请输入学生语文成绩："); students[length].setYuwen(input.nextDouble()); System.out.print("请输入学生数学成绩："); students[length].setMath(input.nextDouble()); System.out.print("请输入学生英语成绩："); students[length].setEnlish(input.nextDouble()); System.out.print("请输入学生物理成绩："); students[length].setWuli(input.nextDouble()); System.out.print("请输入学生地理成绩："); students[length].setDili(input.nextDouble()); length++; System.out.println("添加成功！"); } //显示成绩单方法 public void transcript() { System.out.println("====================================="); System.out.println("学号 姓名 性别 语文 数学 英语 物理 地理 "); for(int i = 0; i < length; i++) { System.out.println(" "+students[i].getNum() + "\t"+ students[i].getName() + "\t" + students[i].getSex() + "\t" + students[i].getYuwen() + "\t" + students[i].getMath() + "\t" + students[i].getEnlish()+ "\t" + students[i].getWuli()+ "\t" + students[i].getDili()); } System.out.println("=====================================\n"); } public void sortYuwen(){ } //删除学生记录方法 public void delete() { System.out.print("请输入您要删除信息的学生的学号: "); String number1 = input.next(); int i, flag = length; for(i = 0; i < length; i++) { if(number1.equals(students[i].getNum())) { flag = i; break; } } if(i == length) { System.out.println("查无此人！请核对后重新输入 \n"); delete(); } else { for(int j = flag; j < length; j++) { students[j] = students[j + 1]; } System.out.println("删除成功！\n"); length -= 1; //不减1会报数组越界的错误 } } //修改学生信息方法 public void recompose() { System.out.print("请输入您要修改信息的学生的学号："); String number3 = input.next(); int i; for(i = 0; i < length; i++) { if(number3.equals(students[i].getNum())) { System.out.println("请输入该学生新的学号，姓名,语文成绩，数学成绩，英语成绩："); students[i].setNum(input.next()); students[i].setName(input.next()); students[i].setYuwen(input.nextDouble()); students[i].setMath(input.nextDouble()); students[i].setEnlish(input.nextDouble()); students[i].setWuli(input.nextDouble()); students[i].setDili(input.nextDouble()); System.out.println("修改成功！\n"); break; } } if(i == length) { System.out.println("查无此人！请核对后重新输入学号\n"); recompose(); } } public void daochu() throws IOException { File file=new File("d:student\\student.txt"); FileWriter fileWriter = new FileWriter(file); fileWriter.write("学号 姓名 性别 语文 数学 英语 物理 化学"); fileWriter.write("\r\n"); for (int i = 0; i < students.length; i++) { if (students[i]==null){ break; } String num=students[i].getNum(); String name=students[i].getName(); String sex=students[i].getSex(); Double yuwen=students[i].getYuwen(); Double math=students[i].getMath(); Double enlish=students[i].getEnlish(); Double dili=students[i].getDili(); Double wuli=students[i].getWuli(); fileWriter.write(num+" "+name+" "+sex+" "+yuwen+" "+math+" "+enlish+" "+wuli+" "+dili); fileWriter.write("\r\n"); } fileWriter.close(); System.out.println("导入成功"); } }