Java学习12.16

学生成绩管理系统2

实体类——StudentInfo.java

package bean;

public class studentInfo {
    private String IDnumber;
    private String name;
    private String socre;
    private String classroom;
    private String major;
    public String getIDnumber() {
        return IDnumber;
    }
    public void setIDnumber(String iDnumber) {
        IDnumber = iDnumber;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    
    public String getClassroom() {
        return classroom;
    }
    public void setClassroom(String classroom) {
        this.classroom = classroom;
    }
    public String getMajor() {
        return major;
    }
    public void setMajor(String major) {
        this.major = major;
    }
    
    public studentInfo() {
        
    }
    public String getSocre() {
        return socre;
    }
    public void setSocre(String socre) {
        this.socre = socre;
    }
    public studentInfo(String iDnumber, String name, String socre, String classroom, String major) {
        super();
        IDnumber = iDnumber;
        this.name = name;
        this.socre = socre;
        this.classroom = classroom;
        this.major = major;
    }
    
    public void setstudentInfo(String iDnumber, String name, String socre, String classroom, String major) {
        
        IDnumber = iDnumber;
        this.name = name;
        this.socre = socre;
        this.classroom = classroom;
        this.major = major;
    }
    @Override
    public String toString() {
        return "student [IDnumber=" + IDnumber + ", name=" + name + ", socre=" + socre + ", classroom=" + classroom
                + ", major=" + major + ", getIDnumber()=" + getIDnumber() + ", getName()=" + getName()
                + ", getClassroom()=" + getClassroom() + ", getMajor()=" + getMajor() + ", getSocre()=" + getSocre()
                + "]";
    }
    

}

servlet层——servlet.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 bean.studentInfo;
import bean.dao;
import bean.DButil;
@WebServlet("/servletpeople")
public class servletpeople extends HttpServlet{
    private static final long serialVersionUID = 1L;
    dao dao=new dao();
    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);
        } else if ("delete".equals(method)) {
            delete(req, resp);
        }  else if ("search".equals(method)) {
            search(req, resp);
        } else if ("list".equals(method)) {
            list(req, resp);
        } else if("getbyname".equals(method)) {
            getbyname(req,resp);
        }else if("searchxiugai".equals(method)) {
            searchxiugai(req,resp);
        }
    }
    
    private void getbyname(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        studentInfo ten = dao.getbyname(name);
        if(ten==null)
        {
            req.setAttribute("message", "未找到该学生");
            req.getRequestDispatcher("deletepeople.jsp").forward(req, resp);
        }
        else 
        {
            req.setAttribute("ten", ten);
            req.getRequestDispatcher("servletpeople?method=delete").forward(req,resp);
        }
    }
    
    
    private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
        req.setCharacterEncoding("utf-8");
        
        String IDnumber=req.getParameter("IDnumber");
        String Name = req.getParameter("name");
        String major = req.getParameter("major");
        String score = req.getParameter("score");
        String classroom=req.getParameter("classroom");
        
        studentInfo stu=new studentInfo(IDnumber,Name,score,classroom,major);
        
        if(dao.add(stu)) {
            req.setAttribute("message", "添加成功");
            req.getRequestDispatcher("servletpeople?method=list").forward(req,resp);
        } else {
            req.setAttribute("message", "姓名重复，请重新录入");
            req.getRequestDispatcher("addpeople.jsp").forward(req,resp);
        }
    }
    
    private void list(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        List<studentInfo> tens = dao.list();
        req.setAttribute("tens", tens);
        req.getRequestDispatcher("list.jsp").forward(req,resp);
    }
    
    private void delete(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name=req.getParameter("name");
        if(dao.delete(name)) {
        req.setAttribute("message", "删除成功");
        req.getRequestDispatcher("servletpeople?method=list").forward(req,resp);
        }else {
             req.setAttribute("message", "删除失败");
             req.getRequestDispatcher("deletepeople.jsp").forward(req,resp);
        }
    }
    
   
    //查找
    private void search(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
         req.setCharacterEncoding("utf-8");
         String IDnumber = req.getParameter("IDnumber");
         String name=req.getParameter("name");
         List<studentInfo> tens = dao.search(IDnumber,name);
         if(tens==null)
         {
             req.setAttribute("message", "没有该同学");
             req.getRequestDispatcher("searchpeople.jsp").forward(req,resp);
         }
         else {
         req.setAttribute("tens", tens);
         req.getRequestDispatcher("list2.jsp").forward(req,resp);
         }
     }
    
    //查找要修改的人员
    private void searchxiugai(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
           String IDnumber=req.getParameter("IDnumber");
        String name=req.getParameter("name");
        String score=req.getParameter("score");
        String classroom=req.getParameter("classroom");
        String major=req.getParameter("major");
        
         studentInfo stu = new studentInfo(IDnumber,name,score,classroom,major);
         boolean ten=dao.update(stu);
         studentInfo tens = dao.getbyname(name);
         if(ten==false)
         {
             req.setAttribute("message", "没有该同学");
             req.getRequestDispatcher("xiugai.jsp").forward(req,resp);
         }
         else {
         
         System.out.println(tens.getSocre());
         req.setAttribute("tens", tens);
         req.getRequestDispatcher("list2.jsp").forward(req,resp);
         }
    }
    
    private void update(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
         String IDnumber=req.getParameter("IDnumber");
        String name=req.getParameter("name");
        String score=req.getParameter("score");
        String classroom=req.getParameter("classroom");
        String major=req.getParameter("major");
        studentInfo student=new studentInfo(IDnumber,name,score,classroom,major);
        
        studentInfo stu = dao.getbyname(name);
        
 
        boolean ten=dao.update(student);
        List<studentInfo> tens = dao.search(stu.getIDnumber(),stu.getName());
         if(ten==true)
         {
             
             req.getRequestDispatcher("list2.jsp").forward(req,resp);
         }
         else {
         req.setAttribute("tens", tens);
         req.setAttribute("message", "修改失败，请重新修改");
         req.getRequestDispatcher("list.jsp").forward(req,resp);
         }
        
   
        
    }
    
}

明日计划

练习前端界面的设计