Java Web学生信息保存

Course.java
package entity;
public class Course {
    private int id;
    private String num;
    private String mima;
    private String sex;
    private String name;
    private String studentnum;
    private String youxiang;
    private String xueyuan;
    private String xi;
    private String banji;
    private String year;
    private String plase;
    private String beizhu;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getNum() {
        return num;
    }
    public void setNum(String num) {
        this.num = num;
    }
    public String getMima() {
        return mima;
    }
    public void setMima(String mima) {
        this.mima = mima;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public String getStudentnum() {
        return studentnum;
    }
    public void setStudentnum(String studentnum) {
        this.studentnum = studentnum;
    }
    public String getYouxiang() {
        return youxiang;
    }
    public void setYouxiang(String youxiang) {
        this.youxiang = youxiang;
    }
    public String getXueyuan() {
        return xueyuan;
    }
    public void setXueyuan(String xueyuan) {
        this.xueyuan = xueyuan;
    }
    public String getXi() {
        return xi;
    }
    public void setXi(String xi) {
        this.xi = xi;
    }
    public String getBanji() {
        return banji;
    }
    public void setBanji(String banji) {
        this.banji = banji;
    }
    public String getYear() {
        return year;
    }
    public void setYear(String year) {
        this.year = year;
    }
    public String getPlase() {
        return plase;
    }
    public void setPlase(String plase) {
        this.plase = plase;
    }
    public String getBeizhu() {
        return beizhu;
    }
    public void setBeizhu(String beizhu) {
        this.beizhu = beizhu;
    }
    public String getName() {
        return name;
    }
    public Course() {}
    
    public Course( String num, String mima, String sex, String name, String studentnum, String youxiang, String xueyuan, String xi, String banji, String year, String plase, String beizhu) {
        
        this.num = num;
        this.mima = mima;
        this.sex = sex;
        this.name = name;
        this.studentnum = studentnum;
        this.youxiang = youxiang;
        this.xueyuan = xueyuan;
        this.xi = xi;
        this.banji = banji;
        this.year = year;
        this.plase = plase;
        this.beizhu = beizhu;
    }    
}
CourseServlet.java

package servlet;import java.io.IOException;import java.util.List;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import entity.Course;import dao.CourseDao;public class CourseServlet extends HttpServlet {      private static final long serialVersionUID = 1L;     public CourseServlet() {            super();        }    CourseDao dao = new CourseDao();    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {        req.setCharacterEncoding("utf-8");        String method = req.getParameter("method");        if ("add".equals(method)) {            add(req, resp);        }     }    private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {        req.setCharacterEncoding("utf-8");        String num = req.getParameter("num");        String mima = req.getParameter("mima");        String name = req.getParameter("name");        String sex = req.getParameter("sex");        String studentnum = req.getParameter("studentnum");               String xueyuan = req.getParameter("xueyuan");        String xi = req.getParameter("xi");        String banji = req.getParameter("banji");        String year = req.getParameter("year");        String plase = req.getParameter("plase");        String beizhu = req.getParameter("beizhu");        String youxiang = req.getParameter("youxiang");            Course course = new Course(num,mima,sex,name,studentnum,youxiang,xueyuan,xi,banji,year,plase,beizhu);                //添加后消息显示        if(dao.add(course)){               req.setAttribute("message", "注册成功");            req.getRequestDispatcher("index.jsp").forward(req,resp);}        else {            req.setAttribute("message", "注册失败");            req.getRequestDispatcher("zhuce.jsp").forward(req,resp);}        }    }