学生类代码
student.java
package dormitory;public class student { private string id; private string name; private string sex; private string dormid; public string getid() { return id; } public void setid(string id) { this.id = id; } public string getname() { return name; } public void setname(string name) { this.name = name; } public string getsex() { return sex; } public void setsex(string sex) { this.sex = sex; } public string getdormid() { return dormid; } public void setdormid(string dormid) { this.dormid = dormid; }}
主操作代码
intailstudent.java
package dormitory;import java.awt.list;import java.io.bufferedreader;import java.io.bufferedwriter;import java.io.filenotfoundexception;import java.io.filereader;import java.io.filewriter;import java.io.ioexception;import java.util.arraylist;import java.util.iterator;import java.util.scanner;import javax.print.docflavor.input_stream;import javax.swing.event.listselectionevent;import org.omg.portableinterceptor.iorinterceptor;public class initailstudent { private static int n=0; private static student[] stu=new student[100]; //主函数 public static void main(string[] args) throws ioexception { boolean a=false; boolean b=false; initailstudent student=new initailstudent(); student.judge(a, b); } //登入函数 private void judge(boolean a, boolean b) throws ioexception { do { system.out.println("欢迎进入登入页面！"); scanner input=new scanner(system.in); system.out.println("请输入账号："); string account=input.nextline(); system.out.println("请输入密码："); string code=input.nextline(); a=account.equals("admin"); b=code.equals("admin"); } while(!(a==true&&b==true)); menu(); } //系统菜单页面 private void menu() throws ioexception{ scanner input=new scanner(system.in); system.out.println("------ 欢迎进入宿舍管理系统 ------"); system.out.println("------ 请选择下列操作 ------"); system.out.println("--- 1.显示所有学生信息 ---"); //show() system.out.println("--- 2.查询学生信息 ---"); //find() system.out.println("--- 3.增加学生信息 ---"); //add() system.out.println("--- 4.修改学生信息 ---"); //renew() system.out.println("--- 5.删除学生信息 ---"); //delete() system.out.println("--- 0.退出系统 ---"); system.out.println("请输入1~5:"); int a=input.nextint(); while(a<0||a>5) { system.out.println("输入有误，请重新输入："); a=input.nextint(); } switch (a) { case 1: show(); break; case 2: find(); break; case 3: add(); break; case 4: renew(); break; case 5: delete(); break; case 0: system.out.println("成功退出系统！"); system.exit(0); break; } } //显示学生的全部信息 private void show() throws ioexception{ system.out.println("您总录入的信息如下："); system.out.println("*****************************"); bufferedreader br=new bufferedreader(new filereader("student.txt")); string line; while((line=br.readline())!=null){ system.out.println(line); } br.close(); system.out.println("\n\r"); system.out.println("此次录入的信息为"); system.out.println("*****************************"); int i; for(i=0;i<n;i++) { system.out.println("学号："+stu[i].getid()+"\t姓名："+stu[i].getname()+"\t性别："+stu[i].getsex()+"\t宿舍号："+stu[i].getdormid()); } system.out.println("返回主菜单"); menu(); } //查询学生信息 private void find() throws ioexception{ arraylist<arraylist<string>> lists = new arraylist<>(); bufferedreader br=new bufferedreader(new filereader("student.txt")); string line; arraylist<string> list = new arraylist<>(); arraylist<string> validlist = new arraylist<>(); while((line=br.readline())!=null){ list.add(line.tostring()); } br.close(); for(int i = 0;i<list.size();i++) if(i!=0&&list.get(i-1).startswith("学号")){ validlist.add(list.get(i)); } for (string string : validlist) { string[] split = string.split(" "); arraylist<string> tempstring = new arraylist<>(); for (string string2 : split) { tempstring.add(string2); } lists.add(tempstring); } system.out.println("共有"+lists.size()+"个学生信息"); string[][] stu1=new string[lists.size()][4]; for(int i=0;i<lists.size();i++) for(int j=0;j<4;j++){ stu1[i][j]=lists.get(i).get(j); } system.out.println("请输入学生的学号："); scanner input=new scanner(system.in); string d=input.next(); for(int i=0;i<stu1.length;i++) { if(d.equals(stu1[i][0])) { system.out.println("查询成功，以下为该学生的信息"); system.out.println("学号："+stu1[i][0]+"\t姓名："+stu1[i][1]+"\t性别："+stu1[i][2]+"\t宿舍号："+stu1[i][3]); system.out.println("是否继续查询，否返回菜单，是y否n"); string cho=input.next(); char ch=cho.charat(0); while(ch!='y'&&ch!='y'&&ch!='n'&&ch!='n') { system.out.println("输入有误！请重新输入："); cho=input.next(); ch=cho.charat(0); } while(ch=='y'||ch=='y'){ find(); } while(ch=='n'||ch=='n'){ menu(); } } } system.out.println("没有找到该学生，是继续输入，否返回菜单，是y否n"); string cho=input.next(); char ch=cho.charat(0); while(ch!='y'&&ch!='y'&&ch!='n'&&ch!='n') { system.out.println("输入有误！请重新输入："); cho=input.next(); ch=cho.charat(0); } while(ch=='y'||ch=='y'){ find(); } while(ch=='n'||ch=='n'){ menu(); } } //增加一个学生 private void add() throws ioexception{ string id; string dormid; string name; string sex; string cho; char ch; stu[n]=new student(); scanner input=new scanner(system.in); if(n==0) { system.out.println("您此次还没有录入任何信息，是否录入，是y否n"); cho=input.next(); ch=cho.charat(0); while(ch!='y'&&ch!='y'&&ch!='n'&&ch!='n') { system.out.println("输入有误！请重新输入："); cho=input.next(); ch=cho.charat(0); } while(ch=='y'||ch=='y'){ break; } while(ch=='n'||ch=='n'){ menu(); } } filewriter fw=new filewriter("student.txt",true); fw.write("\r\n"); fw.write("学号 姓名 性别 宿舍号 \r\n"); system.out.println("请输入学生的学号："); id=input.next(); stu[n].setid(id); fw.write(stu[n].getid()+" "); system.out.println("请输入学生的姓名："); name=input.next(); stu[n].setname(name); fw.write(stu[n].getname()+" "); system.out.println("请输入学生的性别："); sex=input.next(); stu[n].setsex(sex); fw.write(stu[n].getsex()+" "); system.out.println("请输入学生的宿舍号："); dormid=input.next(); stu[n].setdormid(dormid); fw.write(stu[n].getdormid()+" "); n++; fw.close(); system.out.println("是否继续添加学生？否返回主菜单，是y否n"); cho=input.next(); ch=cho.charat(0); while(ch!='y'&&ch!='y'&&ch!='n'&&ch!='n') { system.out.println("输入有误！请重新输入："); cho=input.next(); ch=cho.charat(0); } while(ch=='y'||ch=='y'){ add(); } while(ch=='n'||ch=='n'){ menu(); } } //修改学生信息 private void renew() throws ioexception{ arraylist<arraylist<string>> lists = new arraylist<>(); bufferedreader br=new bufferedreader(new filereader("student.txt")); string line; arraylist<string> list = new arraylist<>(); arraylist<string> validlist = new arraylist<>(); while((line=br.readline())!=null){ list.add(line.tostring()); } br.close(); for(int i = 0;i<list.size();i++) if(i!=0&&list.get(i-1).startswith("学号")){ validlist.add(list.get(i)); } for (string string : validlist) { string[] split = string.split(" "); arraylist<string> tempstring = new arraylist<>(); for (string string2 : split) { tempstring.add(string2); } lists.add(tempstring); } string[][] stu1=new string[lists.size()][4]; for(int i=0;i<lists.size();i++) for(int j=0;j<4;j++){ stu1[i][j]=lists.get(i).get(j); } int temp=0; boolean flag=false; system.out.println("请输入要修改学生的学号:"); scanner input=new scanner(system.in); string d=input.next(); for(int i=0;i<stu1.length;i++) { while(d.equals(stu1[i][0])) { temp=i; flag=true; break; } } if(!flag) { system.out.println("输入的学号有误,未找到该学生，是否再次进入修改,是y,否n"); string cho1=input.next(); char ch2=cho1.charat(0); while (ch2!='n'&&ch2!='n'&&ch2!='y'&&ch2!='y') { system.out.println("输入无效，请重新输入："); cho1=input.next(); ch2=cho1.charat(0); } if (ch2=='y'||ch2=='y'){ renew(); } if (ch2=='n'||ch2=='n'){ system.out.println("返回主菜单"); menu(); } } else { system.out.println("您要修改的学生的信息如下："); system.out.println("学号："+stu1[temp][0]+"\t姓名："+stu1[temp][1]+"\t性别："+stu1[temp][2]+"\t宿舍号："+stu1[temp][3]); system.out.println("请以下选择要修改的内容："); system.out.println("------ 1.姓名 ------"); system.out.println("------ 2.性别 ------"); system.out.println("------ 3.宿舍号 ------"); scanner input1=new scanner(system.in); int a=input1.nextint(); if(a==1) { system.out.println("请输入新的姓名："); string name=input1.next(); stu1[temp][1]=name; filewriter fw1=new filewriter("student.txt"); fw1.write(" "); fw1.close(); filewriter fw=new filewriter("student.txt",true); fw.write("\r\n"+" "+"学生信息表\r\n"); for(int i=0;i<stu1.length;i++) { fw.write("\r\n学号 姓名 性别 宿舍号 \r\n"); fw.write(stu1[i][0]+" "); fw.write(stu1[i][1]+" "); fw.write(stu1[i][2]+" "); fw.write(stu1[i][3]+" "); } fw.close(); system.out.println("修改成功！"); system.out.println("还要继续修改吗?是继续修改，否返回主菜单，是y否n"); string cho1=input1.next(); char ch2=cho1.charat(0); while (ch2!='n'&&ch2!='n'&&ch2!='y'&&ch2!='y') { system.out.println("输入无效，请重新输入："); cho1=input.next(); ch2=cho1.charat(0); } if (ch2=='y'||ch2=='y'){ renew(); } if (ch2=='n'||ch2=='n'){ system.out.println("返回主菜单"); menu(); } } else if(a==2) { system.out.println("请输入新的性别："); string sex=input1.next(); stu1[temp][2]=sex; filewriter fw1=new filewriter("student.txt"); fw1.write(" "); fw1.close(); filewriter fw=new filewriter("student.txt",true); fw.write("\r\n"+" "+"学生信息表\r\n"); for(int i=0;i<stu1.length;i++) { fw.write("\r\n学号 姓名 性别 宿舍号 \r\n"); fw.write(stu1[i][0]+" "); fw.write(stu1[i][1]+" "); fw.write(stu1[i][2]+" "); fw.write(stu1[i][3]+" "); } fw.close(); system.out.println("修改成功！"); system.out.println("还要继续修改吗?是继续修改，否返回主菜单，是y否n"); string cho1=input1.next(); char ch2=cho1.charat(0); while (ch2!='n'&&ch2!='n'&&ch2!='y'&&ch2!='y') { system.out.println("输入无效，请重新输入："); cho1=input.next(); ch2=cho1.charat(0); } if (ch2=='y'||ch2=='y'){ renew(); } if (ch2=='n'||ch2=='n'){ system.out.println("返回主菜单"); menu(); } } else if(a==3) { system.out.println("请输入新的宿舍号："); string dormid=input1.next(); stu1[temp][3]=dormid; filewriter fw1=new filewriter("student.txt"); fw1.write(" "); fw1.close(); filewriter fw=new filewriter("student.txt",true); fw.write("\r\n"+" "+"学生信息表\r\n"); for(int i=0;i<stu1.length;i++) { fw.write("\r\n学号 姓名 性别 宿舍号 \r\n"); fw.write(stu1[i][0]+" "); fw.write(stu1[i][1]+" "); fw.write(stu1[i][2]+" "); fw.write(stu1[i][3]+" "); } fw.close(); system.out.println("修改成功！"); system.out.println("还要继续修改吗?是继续修改，否返回主菜单，是y否n"); string cho1=input1.next(); char ch2=cho1.charat(0); while (ch2!='n'&&ch2!='n'&&ch2!='y'&&ch2!='y') { system.out.println("输入无效，请重新输入："); cho1=input.next(); ch2=cho1.charat(0); } if (ch2=='y'||ch2=='y'){ renew(); } if (ch2=='n'||ch2=='n'){ system.out.println("返回主菜单"); menu(); } } else { system.out.println("输入有误，请重新输入："); renew(); } } } //删除学生信息 private void delete() throws ioexception{ arraylist<arraylist<string>> lists = new arraylist<>(); bufferedreader br=new bufferedreader(new filereader("student.txt")); string line; arraylist<string> list = new arraylist<>(); arraylist<string> validlist = new arraylist<>(); while((line=br.readline())!=null){ list.add(line.tostring()); } br.close(); for(int i = 0;i<list.size();i++) if(i!=0&&list.get(i-1).startswith("学号")){ validlist.add(list.get(i)); } for (string string : validlist) { string[] split = string.split(" "); arraylist<string> tempstring = new arraylist<>(); for (string string2 : split) { tempstring.add(string2); } lists.add(tempstring); } string[][] stu1=new string[lists.size()][4]; for(int i=0;i<lists.size();i++) for(int j=0;j<4;j++){ stu1[i][j]=lists.get(i).get(j); } int temp=0; boolean flag=true; system.out.println("请输入你想要删除该学生的学号："); scanner input2=new scanner(system.in); string d=input2.next(); for(int i=0;i<stu1.length;i++) { while(d.equals(stu1[i][0])) { temp=i; flag=true; break; } } if(!flag) { system.out.println("输入的学号有误,未找到该学生，再次进入删除，请重新输入："); string cho1=input2.next(); char ch2=cho1.charat(0); while (ch2!='n'&&ch2!='n'&&ch2!='y'&&ch2!='y') { system.out.println("输入无效，请重新输入："); cho1=input2.next(); ch2=cho1.charat(0); } if (ch2=='y'||ch2=='y'){ delete(); } if (ch2=='n'||ch2=='n'){ system.out.println("返回主菜单"); menu(); } } else{ system.out.println("您要删除的学生的信息如下："); system.out.println("学号："+stu1[temp][0]+"\t姓名："+stu1[temp][1]+"\t性别："+stu1[temp][2]+"\t宿舍号："+stu1[temp][3]); for (int i=temp;i<stu1.length-1;i++) { stu1[i]=stu1[i+1]; } filewriter fw1=new filewriter("student.txt"); fw1.write(" "); fw1.close(); filewriter fw=new filewriter("student.txt",true); fw.write("\r\n"+" "+"学生信息表\r\n"); for(int i=0;i<stu1.length-1;i++) { fw.write("\r\n学号 姓名 性别 宿舍号 \r\n"); fw.write(stu1[i][0]+" "); fw.write(stu1[i][1]+" "); fw.write(stu1[i][2]+" "); fw.write(stu1[i][3]+" "); } fw.close(); system.out.println("删除该学生信息成功！"); system.out.println("---------------------"); } system.out.println("还要继续删除吗?是继续删除，否返回主菜单，是y否n"); string cho2=input2.next(); char ch3=cho2.charat(0); while (ch3!='n'&&ch3!='n'&&ch3!='y'&&ch3!='y') { system.out.println("输入无效，请重新输入："); cho2=input2.next(); ch3=cho2.charat(0); } if (ch3=='y'||ch3=='y'){ delete(); } if (ch3=='n'||ch3=='n'){ system.out.println("返回主菜单"); menu(); } } }
以上就是java如何实现学生宿舍系统的详细内容。