--------------------------------------------java文件纵横转换作业题--------------------------------------
作业：把左边的文件转换成右边的样子
步骤分析
1. 抽象Student类
2. 解析文件成List<Student>
a) 获得每一行，然后按着空格来做切分
3. 把集合写入文件
首先创建Student类
public class Student implements Comparable<Student>{
/**
* 学号
*/
private String stuNo;
/**
* 姓名
*/
private String name;
/**
* 性别
*/
private String gender;
/**
* 年龄
*/
private String age;
/**
* 身高
*/
private String tall;
/**
* 体重
*/
private String weight;
/**
* 电话
*/
private String tel;
public String getStuNo() {
return stuNo;
}
public void setStuNo(String stuNo) {
this.stuNo = stuNo;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getTall() {
return tall;
}
public void setTall(String tall) {
this.tall = tall;
}
public String getWeight() {
return weight;
}
public void setWeight(String weight) {
this.weight = weight;
}
public String getTel() {
return tel;
}
public void setTel(String tel) {
this.tel = tel;
}
@Override
public String toString() {
return"Student [stuNo=" + stuNo + ",name=" + name + ", gender=" + gender + ",age=" + age + ", tall=" + tall
+ ", weight=" + weight + ", tel=" + tel + "\n]";
}
@Override
public int compareTo(Student o) {
intval = this.stuNo.compareTo(o.stuNo);
returnval;
}
}
---------------------------------------------------
再对文件进行解释
public class FileUtils {
public static void main(String[] args) {
parseFile();
/*[Student [stuNo=27s1, name=李四, gender=男, age=20, tall=173cm, weight=70kg,tel=13812653051
], Student [stuNo=36s2, name=张三, gender=男, age=21, tall=179cm, weight=76kg,tel=0432-253111
], Student [stuNo=151s1, name=李玲, gender=女, age=19, tall=166cm, weight=50kg,tel=13921256372
], Student [stuNo=26s2, name=王五, gender=男, age=22, tall=182cm, weight=80kg,tel=13811527635
], Student [stuNo=13s3, name=李强, gender=男, age=24, tall=188cm, weight=79kg,tel=13847473232
]]*/
writeFile();
/*学号 姓名性别年龄身高体重电话
李强李强男 24 188cm 79kg 13847473232
李玲李玲女 19 166cm 50kg 13921256372
王五王五男 22 182cm 80kg 13811527635
李四李四男 20 173cm 70kg 13812653051
张三张三男 21 179cm 76kg 0432-253111*/
}
/**
* 定义存储学生对象的集合
*/
static List<Student> sList = new ArrayList<Student>();
/**
* 解析文件
*/
public static void parseFile() {
//定义字符缓冲区
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader("student.txt"));
//定义是否是第一行的变量
boolean isFirstRow = true;
//定义存储行的变量
String line = null;
while((line = br.readLine()) != null) {
//把每一个行通过空格来切分
String[] arr = line.split(" ");
//如果是第一行
if(isFirstRow) {
//遍历第一行的学号
for(inti = 1;i<arr.length;i++) {
//创建学生对象
Student s = new Student();
//把学生加入到集合
sList.add(s);
}
isFirstRow = false;
}
setAttr(arr);
}
System.out.println(sList);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if(br!=null)
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 给Student属性赋值
* @param arr
*/
public static void setAttr(String[] arr) {
//获得每一行的头
String head = arr[0];
//循环行的每一个拆分项，从第二项开始
for (inti = 1; i < arr.length; i++) {
//在集合中根据索引来获得学生对象
Student s = sList.get(i-1);
switch(head) {
case"学号":
s.setStuNo(arr[i]);
break;
case"姓名":
s.setName(arr[i]);
break;
case"性别":
s.setGender(arr[i]);
break;
case"年龄":
s.setAge(arr[i]);
break;
case"身高":
s.setTall(arr[i]);
break;
case"体重":
s.setWeight(arr[i]);
break;
case"电话":
s.setTel(arr[i]);
break;
}
}
}
/**
* 把集合写入文件
*/
public static void writeFile() {
//对集合进行排序
Collections.sort(sList);
PrintWriter pw = null;
try {
pw = new PrintWriter("studenResult.txt");
pw.println("学号\t姓名\t性别\t年龄\t身高\t体重\t电话");
for (Student s : sList) {
pw.println(s.getName() + "\t" + s.getName()+ "\t" +s.getGender()+ "\t"
+s.getAge()+ "\t" +s.getTall()+ "\t"
+s.getWeight()+ "\t" +s.getTel());
pw.flush();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
if(pw != null)
pw.close();
}
}
}