java学生成绩管理系统

1、import java.util.Arrays;import java.io.*;import java.util.Scanner;public class OrderString m=new String5;String e=new String5;String name=new String5; String num=new String5;public Order(String m0,String m1,String m2,String m3,String m4,String e0,String e1,String e2,String e3,String e4,String name0,

2、String name1,String name2,String name3,String name4,String num0,String num1,String num2,String num3,String num4)this.m0=m0;this.m1=m1;this.m2=m2;this.m3=m3;this.m4=m4;this.e0=e0;this.e1=e1;this.e2=e2;this.e3=e3;this.e4=e4;0=name0;1=name1;2=name2;3=name3;4

3、=name4;this.num0=num0;this.num1=num1;this.num2=num2;this.num3=num3;this.num4=num4;public void Fuc()int m1=Integer.parseInt(m0);/ 将 String 类型强制转换为 int ，类型，否则 readline 不能读取 int 类型int m2=Integer.parseInt(m1);int m3=Integer.parseInt(m2);int m4=Integer.parseInt(m3);int m5=Integer.parseInt(m4);int e1=Inte

4、ger.parseInt(e0);int e2=Integer.parseInt(e1);int e3=Integer.parseInt(e2);inf e4nCDger.parse-nf(e-3 一)八inf e5nCDger.parse-nf(e-4 一)八scdenssf H new sEdenwsfol H new Sfudenf(nameoL numoLe 严 ml)八sf三 H new Sfudenf(name-匸 num-二ezm2)八sf-21 H new Sfudenf(name-2L num-2Le3m3)八sf-31 H new Sfudenf(nameooL num-3

5、Le4ym4)八sfsH new Sfudenf(name_4L num_4Leam5)八Alrays.sort(sf)八、* for (infi H 0二八 sf.-engfh 二+)宀sysCDm ouf.p ri nf - n (sf 三)八Y_Shing WSH-辱 _+nameo+= 4 2+numo+=M函_+e+=蒲 _-+(e2+m2=Siring _-+(e3+m3=Siring _-+(e4+m4=Siring _-+(e5+m5=sink SOUHUnew sink(=dscdenfgrade 一一 sort.txv)八s=r2u=辱 _+name 三+=s=r3u=辱

6、_+name_2+=s=r4H=辱 _-+name_3+=s=r5u=+=3竺4+=souM .wriCD-ine(s=rl) souM wriCD=ne(s=r2) souH wriCD=ne(s=r3) souM .wriCD=ne(s=r4) souM .wriCD=ne(s=r5)souM .coseo-5二for(li0x5T+)sysCDmouf.p ri nf - n (sf 三)-LFnum 三+ _=num-2+ _=num-3+ =+num5+M函_+e2+=勞 _+m2+=、辱注M函_-+e3+=蒲 -_-+m3+=、辱注M函_+e4+=選 _+m4+=、辱注M函_-+e

7、5+=蒲 -+35+=、辱 注public class Result String y=new String5;String m=new String5; Result(String y1,String y2,String y3,String y4,String y5,String m1,String m2,String m3,String m4,String m5) this.y0=y1;this.y1=y2;this.y2=y3;this.y3=y4;this.y4=y5; this.m0=m1; this.m1=m2; this.m2=m3; this.m3=m4; this.m4=m5

8、;public void Average()double aveEng;double aveMath;double i1=Double.parseDouble(y0); / 将 String 类型强制转换为 int ，类型，否则 readline 不能读取 int 类型double i2=Double.parseDouble(y1);double i3=Double.parseDouble(y2);double i4=Double.parseDouble(y3);double i5=Double.parseDouble(y4);double j1=Double.parseDouble(m0);

9、double j2=Double.parseDouble(m1);double j3=Double.parseDouble(m2);double j4=Double.parseDouble(m3);double j5=Double.parseDouble(m4);aveEng=(i1+i2+i3+i4+i5)/5; aveMath=(j1+j2+j3+j4+j5)/5;System.out.println( 五名同学英语平均值为 +aveEng);System.out.println( 五名同学数学平均值为 +aveMath);public void Rate()int k;double su

10、m1=0,sum2=0,sum3=0,sum4=0;double Engfail,Mathfail,Engpass,Mathpass;int i1=Integer.parseInt(y0);/ 将 String 类型强制转换为 int ，类型，否则 readline 不 能读取 int 类型int i2=Integer.parseInt(y1);int i3=Integer.parseInt(y2);int i4=Integer.parseInt(y3);int i5=Integer.parseInt(y4);int j1=Integer.parseInt(m0);int j2=Integer

11、.parseInt(m1);int j3=Integer.parseInt(m2);int j4=Integer.parseInt(m3);int j5=Integer.parseInt(m4);double t=i1,i2,i3,i4,i5,j1,j2,j3,j4,j5;for(k=0;k5;k+) if(tk60) sum1=sum1+1;else sum3=sum3+1;for(k=5;k10;k+) if(tk60) sum2=sum2+1;else sum4=sum4+1;Engfail=sum1/5;Mathfail=sum2/5;Engpass=sum3/5;Mathpass=s

12、um4/5;System.out.println( 英语及格率为 :+Engpass);System.out.println( 数学及格率为 :+Mathpass);System.out.println( 英语不及格率为： +Engfail);System.out.println( 数学不及格率为： +Mathfail);public void Rank()int k;double sum1=0,sum2=0,sum3=0,sum4=0,sum5=0,sum6=0;double Engbest,Engbetter,Enggood;double Mathbest,Mathbetter,Mathg

13、ood;int i1=Integer.parseInt(y0);/ 将 String 类型强制转换为 int ，类型，否则 readline 不 能读取 int 类型int i2=Integer.parseInt(y1);int i3=Integer.parseInt(y2);int i4=Integer.parseInt(y3);int i5=Integer.parseInt(y4);int j1=Integer.parseInt(m0);int j2=Integer.parseInt(m1);int j3=Integer.parseInt(m2);int j4=Integer.parseI

14、nt(m3);int j5=Integer.parseInt(m4);double t=i1,i2,i3,i4,i5,j1,j2,j3,j4,j5;for(k=0;k=90)sum1=sum1+1;else if(tk=80&tk=70&tk80) sum3=sum3+1; for(k=5;k=90) sum4=sum4+1;else if(tk=80&tk=70&tk80) sum6=sum6+1;Engbest=sum1/5;Engbetter=sum2/5;Enggood=sum3/5;Mathbest=sum4/5;Mathbetter=sum5/5;Mathgood=sum6/5;S

15、ystem.out.println(” 英语 * 优：+Engbest+良:+Engbetter+中:+Enggood);System.out.println(” 数学 * 优：+Mathbest+良:+Mathbetter+中:+Mathgood);public class sink private BufferedWriter bw;public sink(String filename) if(filename.toLowerCase().compareTo(stdout)=0)bw=new BufferedWriter(new OutputStreamWriter(System.out

16、); else trybw=new BufferedWriter(new FileWriter(filename);catch(IOException e)System.out.println(e.getMessage();System.exit(0);public void writeline(String s)try bw.write(s,0,s.length();bw.newLine();catch(IOException e)System.out.println(e.getMessage();System.exit(0);public void close()trybw.flush()

17、;bw.close();catch(IOException e)System.out.println(e.getMessage();System.exit(0);public class source private BufferedReader br;public source(String filename)if (filename.toLowerCase().compareTo(stdin)=0)/ 判断是否是从键盘输入的br =new BufferedReader(new InputStreamReader(System.in);/ 建立缓冲区键盘输入流else try br=new

18、BufferedReader(new FileReader(filename);catch(FileNotFoundException e)System.out.println(file+filename+is not existing.);System.exit(0);public String readline()String s=new String();trys=br.readLine();catch(IOException e)System.out.println(e.getMessage();System.exit(0);return (s);public void close()

19、try br.close();catch(IOException e)System.out.println(e.getMessage();System.exit(0);class Student implements ComparableString name;String num;int Eng;int Maths;Student(String name,String num,int Eng,int Maths) = name; this.num = num;this.Eng = Eng; this.Maths = Maths;public int getTotalSco

20、re()return Eng+Maths;public int compareTo(Object o)Student s=(Student)o;return getTotalScore()s.getTotalScore() ? 1:(getTotalScore()=s.getTotalScore() 0 :-1); / 这里是重点，实现排序public String toString()return 姓名 : + + 学号: + this.num + n+ 英语： + this.Eng + 数学： + this.Maths+n+ 总成绩： +this.getTotalSco

21、re();public class StudentGrade public static void main(String args) throws IOException String linein = new String54;String lineout = new String54; sink sout=new sink(d:StudentgradeBasicInformation.txt); System.out.print( 请输入第一个姓名： );source sin1=new source(stdin);linein00=sin1.readline();lineout00=li

22、nein00; sout.writeline(lineout00);System.out.print( 请输入该学生的学号： );source sin2=new source(stdin); linein01=sin2.readline();lineout01=linein01;sout.writeline(lineout01);System.out.print( 请输入该学生的英语成绩： ); source sin3=new source(stdin);linein02=sin3.readline(); lineout02=linein02;sout.writeline(lineout02)

23、;System.out.print( 请输入该学生的数学成绩： ); source sin4=new source(stdin);linein03=sin4.readline(); lineout03=linein03;sout.writeline(lineout03);System.out.print( 请输入第二个姓名： ); source sin5=new source(stdin); linein10=sin5.readline(); lineout10=linein10;sout.writeline(lineout10);System.out.print( 请输入该学生的学号： );

24、 source sin6=new source(stdin); linein11=sin6.readline();lineout11=linein11;sout.writeline(lineout11);System.out.print( 请输入该学生的英语成绩： ); source sin7=new source(stdin);linein12=sin7.readline(); lineout12=linein12;sout.writeline(lineout12);System.out.print( 请输入该学生的数学成绩： ); source sin8=new source(stdin)

25、; linein13=sin8.readline();lineout13=linein13;sout.writeline(lineout13);System.out.print( 请输入第三个姓名： ); source sin9=new source(stdin); linein20=sin9.readline(); lineout20=linein20;sout.writeline(lineout20);System.out.print（ 请输入该学生的学号： ）; source sin10=new source(stdin);linein21=sin10.readline(); lineo

26、ut21=linein21;sout.writeline(lineout21);System.out.print( 请输入该学生的英语成绩： ); source sin11=new source(stdin);linein22=sin11.readline(); lineout22=linein22; sout.writeline(lineout22);System.out.print( 请输入该学生的数学成绩： ); source sin12=new source(stdin);linein23=sin12.readline(); lineout23=linein23;sout.writel

27、ine(lineout23);System.out.print( 请输入第四个姓名： ); source sin13=new source(stdin); linein30=sin13.readline();lineout30=linein30;sout.writeline(lineout30);System.out.print( 请输入该学生的学号： ); source sin14=new source(stdin); linein31=sin14.readline();lineout31=linein31;sout.writeline(lineout31);System.out.print

28、( 请输入该学生的英语成绩： ); source sin15=new source(stdin);linein32=sin15.readline(); lineout32=linein32; sout.writeline(lineout32);System.out.print( 请输入该学生的数学成绩： ); source sin16=new source(stdin); linein33=sin16.readline();lineout33=linein33;sout.writeline(lineout33);System.out.print( 请输入第五个姓名： ); source sin

29、17=new source(stdin);linein40=sin17.readline();lineout40=linein40;sout.writeline(lineout40);System.out.print( 请输入该同学的学号： );source sin18=new source(stdin);linein41=sin18.readline();lineout41=linein41;sout.writeline(lineout41);System.out.print( 请输入该同学的英语成绩： );source sin19=new source(stdin);linein42=si

30、n19.readline();lineout42=linein42;sout.writeline(lineout42);System.out.print( 请输入该同学的数学成绩： );source sin20=new source(stdin);linein43=sin20.readline();lineout43=linein43;sout.writeline(lineout43);sout.close();/*计算出每个学生的总成绩，并将学生数据(包括学生 2 门课的总成绩) 按总分由高到低排序后保存到磁盘文件 sort.txt 中。 统计平均成绩，不及格比例，及格比例、优良中所占比例。统计平均成绩，不及格比例，及格比例、优良中所占比例。 */String input=null; int Input;/ 实现界面和程序的循环，避免只能进行一次操作 doSystem.out.println(*System.out.println(*1.System.out.printl