android基础篇------------java基础(7)(Calendar和Data和SimpleDateFormat)

今天我们做一个简单的学生信息录入查询的小例子，主要练习知识点是：Calendar和Data和SimpleDateFormat的应用。

案例说明：

                  学生信息录入系统，要求可以录入多个学生的信息(包括学号/姓名/性别/年龄/入学日期)(用Student类型的数组)。学号用String。

                 录入格式如下：1,zhangfei,man,25,2008-1-1 。存入Student对象中.
                 a、录入完毕后,找到所有姓zhang的学生,并打印出他们的信息
                 b、要求打印出所有的入学日期在xx年的学生信息.（Date类的getYear过时，Calendar类get(Calendar.Year)）

     不多说了，上代码：Student.java

package com.zyy.homework6;

import java.text.SimpleDateFormat;
import java.util.Date;
public class Student {
  //学号/姓名/性别/年龄/入学日期
 	private int stuNum;
    private String stuName;
    private String stuSex;
    private int stuAge;
    private Date date;
	public int getStuNum() {
		return stuNum;
	}
	public void setStuNum(int stuNum) {
		this.stuNum = stuNum;
	}
	public String getStuName() {
		return stuName;
	}
	public void setStuName(String stuName) {
		this.stuName = stuName;
	}
	public String getStuSex() {
		return stuSex;
	}
	public void setStuSex(String stuSex) {
		this.stuSex = stuSex;
	}
	public int getStuAge() {
		return stuAge;
	}
	public void setStuAge(int stuAge) {
		this.stuAge = stuAge;
	}
	public Date getDate() {
		return date;
	}
	public void setDate(Date date) {
		this.date = date;
	}
	@Override
	public String toString() {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		String strDate = sdf.format(this.date);
		return "Student [stuNum=" + stuNum + ", stuName=" + stuName
				+ ", stuSex=" + stuSex + ", stuAge=" + stuAge + ", date="
				+ strDate + "]";	}
	public Student(int stuNum, String stuName, String stuSex, int stuAge,
			Date date) {
		super();
		this.stuNum = stuNum;
		this.stuName = stuName;
		this.stuSex = stuSex;
		this.stuAge = stuAge;
		this.date = date; 
	}
	public Student() {
		super();
		// TODO Auto-generated constructor stub
	}
	
}

StudentMange.java

根据姓名查找：

public static void findStuByName(Student[] stuArr, String nameString) {
		for (int i = 0; i < stuArr.length; i++) {
			String strStuName = stuArr[i].getStuName();
			if (strStuName.startsWith(nameString)) {
				System.out.println(stuArr[i]);
			}
		}
	}

根据录入日期查找：

	public static void findStuByDate(Student[] students, int year) {
		for (int i = 0; i < students.length; i++) {
			Calendar calendar = Calendar.getInstance();
			calendar.setTime(students[i].getDate());

			if (year == calendar.get(calendar.YEAR)) {
				System.out.println(students[i]);
			}
		}

	}

学生信息初始化：

private static void Init(Scanner scan, Student[] students)
			throws ParseException {
		for (int i = 0; i < students.length; i++) {
			String string = scan.next();
			String[] strArr = string.split(",");
			int niStuId = Integer.parseInt(strArr[0]);
			int niStuAge = Integer.parseInt(strArr[3]);
			SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
			Date date = sdf.parse(strArr[4]);
			// 初始化每个学生的信息
			Student student = new Student(niStuId, strArr[1], strArr[2],
					niStuAge, date);
			students[i] = student;
		}
	}

mian函数：

public static void main(String[] args) throws ParseException {
		System.out.println("请输入学生人数");
		Scanner scan = new Scanner(System.in);
		int stuNum = scan.nextInt();
		Student[] students = new Student[stuNum];
		System.out.println("请输入学生信息");
		System.out.println("格式：1,zhangfei,man,25,2008-1-1");
		Init(scan, students);
		System.out.println("请输入你要查找的姓名");
		String nameString = scan.next();
		findStuByName(students, nameString);
		System.out.println("请输入你要查找的年份");
		int yearString = scan.nextInt();
		findStuByDate(students, yearString);

	}

好了，运行一下就可以看到结果了，现在我还没有找到合适的源码存储的地方，稍后，我在上传我的源码，和链接地址，供大家下载学习。有问题，请直接给我留言。