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public class Student {
String id;
String name;
int yuwen;
int shuxue;
int yingyu;
int avg;
int sum;
int sort;
public Student(String id,String name,int yuwen,int shuxue,int yingyu,int avg,int sum){
this.id=id;
this.name=name;
this.yuwen=yuwen;
this.shuxue=shuxue;
this.yingyu=yingyu;
this.avg=avg;
this.sum=sum;
}
public Student(String id,String name,int yuwen,int shuxue,int yingyu){
this.id=id;
this.name=name;
this.yuwen=yuwen;
this.shuxue=shuxue;
this.yingyu=yingyu;
}
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 int getYuwen() {
return yuwen;
}
public void setYuwen(int yuwen) {
this.yuwen = yuwen;
}
public int getShuxue() {
return shuxue;
}
public void setShuxue(int shuxue) {
this.shuxue = shuxue;
}
public int getYingyu() {
return yingyu;
}
public void setYingyu(int yingyu) {
this.yingyu = yingyu;
}
public int getAvg() {
return avg;
}
public void setAvg(int avg) {
this.avg = avg;
}
public int getSum() {
return sum;
}
public void setSum(int sum) {
this.sum = sum;
}
public int getSort() {
return sort;
}
public void setSort(int sort) {
this.sort = sort;
}
}
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public class IOGrage {
public void swap(int[] array,int i,int j){
int temp=array[i];
array[i]=array[j];
array[j]=temp;
}
public static void main(String[] args) {
BufferedReader br = null;
List list = new ArrayList();
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(
new File(C:/grade.txt))));
String temp = br.readLine();
while (temp != null) {
temp = temp.replaceAll( , ,);
StringBuffer sbTemp = new StringBuffer();
String[] each = temp.split(,);
for (int i = 0; i < each.length; i++) {
if (!each[i].equals()) {
sbTemp.append(each[i] + ,);
}
}
each = sbTemp.toString().split(,);
if (!学号.equals(each[0])) {
String id = each[0];
String name = each[1];
int yuwen = Integer.parseInt(each[2]);
int shuxue = Integer.parseInt(each[3]);
int yingyu = Integer.parseInt(each[4]);
int avg = (yuwen + shuxue + yingyu) / 4;
int sum = yuwen + shuxue + yingyu;
Student s = new Student(id, name, yuwen, shuxue, yingyu,
avg, sum);
list.add(s);
}
temp = br.readLine();
}
br.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//System.out.println(list.size());
int[] array=new int[list.size()];
for(int i=0;iStudent s=(Student)list.get(i); array[i]=s.getSum(); } for(int i=0;i for(int j=0;j if(array[j] int t=array[j]; array[j]=array[j+1]; array[j+1]=t; } } } Map map=new HashMap(); for(int i=0;i map.put(array[i], i+1); } List lList=new ArrayList(); for(int i=0;i Student s=(Student)list.get(i); if(s.getName().length()==2){ s.setName(s.getName()+ ); }else if(s.getName().length()==3){ s.setName(s.getName()+ ); } if(s.getId().length()==1){ s.setId(s.getId()+ ); }else if(s.getId().length()==2){ s.setId(s.getId()+ ); } int sum=s.getSum(); int sort=((Integer)map.get(sum)).intValue(); s.setSort(sort); lList.add(s); } StringBuffer sb=new StringBuffer(学号 姓名 语文 数学 英语 平均值 总值 排序); for(int i=0;i Student s=(Student)lList.get(i); sb.append(\n+s.getId()+ +s.getName()+ +s.getYuwen()+ +s.getShuxue()+ +s.getYingyu()+ +s.getAvg()+ +s.getSum()+ +s.getSort()); } BufferedWriter bw=null; try{ bw=new BufferedWriter(new OutputStreamWriter(new FileOutputStream(c:/grade.txt))); bw.write(sb.toString()); bw.close(); }catch(Exception e ){ e.printStackTrace(); } } }
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