学生管理系统公用学生类的编写

package study;

public class Student {
	private String sid;
	private String name;
	private String age;
	private String address;
	public Student() {}//无参数
	public Student(String sid,String name,String age,String address) {
		this.sid=sid;//学号
		this.name=name;
		this.age=age;
		this.address=address;		
	}//有参数
	public void setSid(String sid) {
		this.sid=sid;
	}
	public String getSid() {
		return sid;
	}
	public void setName(String name) {
		this.name=name;
	}
	public String getName() {
		return name;
	}
	public void setAge(String age) {
		this.age=age;
	}
	public String getAge() {
		return age;
	}
	public void setAddress(String address) {
		this.address=address;
	}
	public String getAddress() {
		return address;
	}
}

管理系统这几个功能都要用到这个类。