11.28

图书信息管理系统

今天发一下servlet层所有代码，发完这些后，一个完整的图书信息管理系统也就完全解决了

package libraryservlet;

import java.io.IOException;
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 dao.SchoolDaoImpl;
import entity.School;

/**
 * Servlet implementation class libraryaddservlet
 */
@WebServlet("/libraryaddservlet")
public class libraryaddservlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public libraryaddservlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        //response.getWriter().append("Served at: ").append(request.getContextPath());
        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");
        
        String stuID=request.getParameter("stuID");
        String stuname=request.getParameter("stuname");
        String stusex=request.getParameter("stusex");
        String college=request.getParameter("college");
        String stupassword=request.getParameter("stupassword");
        
        String bookID=request.getParameter("bookID");
        String bookname=request.getParameter("bookname");
        String author=request.getParameter("author");
        String banname=request.getParameter("banname");
        String booknum=request.getParameter("booknum");
        
        String method=request.getParameter("method");
        System.out.println(method);
        SchoolDaoImpl dao=new SchoolDaoImpl();
        if("stu".equals(method)) {
            try{
                System.out.println(1);
                dao.Stuadd(stuID,stupassword,stuname,stusex,college);
                request.getRequestDispatcher("manage.jsp").forward(request, response);

            }catch(Exception e){
                System.out.println("添加失败");
                e.printStackTrace();
            }    
        }
        
        if("book".equals(method)) {
            try{
                System.out.println(1);
                dao.Bookadd(bookID,bookname,author,banname,booknum);
                request.getRequestDispatcher("manage.jsp").forward(request, response);

            }catch(Exception e){
                System.out.println("添加失败");
                e.printStackTrace();
            }    
        }
        
        if("bookreturnshow".equals(method)) {
            try{
            
            java.util.List<School> list=dao.allbookreturnshow();
            
            request.setAttribute("list", list);
            System.out.println("listshow");
            request.getRequestDispatcher("allbookreturnshow.jsp").forward(request, response);

        }catch(Exception e){
            System.out.println("未能正确显示出图书信息");
            e.printStackTrace();
        }
    }
        
        
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

package libraryservlet;

import java.io.IOException;
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 javax.servlet.http.HttpSession;

import dao.SchoolDaoImpl;
import entity.School;

/**
 * Servlet implementation class libraryservlet
 */
@WebServlet("/libraryservlet")
public class libraryservlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public libraryservlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        //response.getWriter().append("Served at: ").append(request.getContextPath());
        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");
        
        String ID=request.getParameter("username");
        HttpSession session=request.getSession();
        session.setAttribute("ID", ID);//存储数据
        request.setAttribute("ID", ID);
        String password=request.getParameter("password");
        String method=request.getParameter("profession");
        SchoolDaoImpl sd=new SchoolDaoImpl();
        if("1".equals(method)) {
            try{
                System.out.println(1);
                
                if("123456".equals(ID)&&"654321".equals(password)) {
                    response.getWriter().println("<script type='text/javascript'> alert('登录成功')</script>");
                request.getRequestDispatcher("manage.jsp").forward(request, response);}
                else {
                    response.getWriter().println("<script type='text/javascript'> alert('密码或账号错误')</script>");
                    request.getRequestDispatcher("library.jsp").forward(request, response);}
            }catch(Exception e){
                System.out.println("失败");
                e.printStackTrace();
            }
        }
        
        if("2".equals(method)) {
            try{
                System.out.println(1);
                
                String stupass=sd.showstuname(ID);
                
                    
                if(password.equals(stupass)) {
                    SchoolDaoImpl sd1=new SchoolDaoImpl();
                    java.util.List<School> list=sd1.stushow(ID);
                    
                    request.setAttribute("list", list);
                    response.getWriter().println("<script type='text/javascript'> alert('登录成功')</script>");
                    request.getRequestDispatcher("student.jsp").forward(request, response);}
                else {
                    response.getWriter().println("<script type='text/javascript'> alert('账号或密码错误')</script>");
                    request.getRequestDispatcher("library.jsp").forward(request, response);}
                
                

            }catch(Exception e){
                System.out.println("失败");
                e.printStackTrace();
            }
        }
        
        
    }
        
    

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

package libraryservlet;


import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

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 javax.servlet.http.HttpSession;

import dao.SchoolDaoImpl;
import entity.School;

/**
 * Servlet implementation class Stuservlet
 */
@WebServlet("/Stuservlet")
public class Stuservlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public Stuservlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        //response.getWriter().append("Served at: ").append(request.getContextPath());
        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");
        
        String method=request.getParameter("method");
        SchoolDaoImpl sd=new SchoolDaoImpl();
        String stuID=(String) request.getSession().getAttribute("stuID");
        String stuname=(String) request.getSession().getAttribute("stuname");
        String stusex=(String) request.getSession().getAttribute("stusex");
        String college=(String) request.getSession().getAttribute("college");
        
        
        
        if("show".equals(method)) {
                try{
                
                java.util.List<School> list=sd.bookshow();
                
                request.setAttribute("list", list);
                System.out.println("listshow");
                request.getRequestDispatcher("stubookshow.jsp").forward(request, response);

            }catch(Exception e){
                System.out.println("未能正确显示出图书信息");
                e.printStackTrace();
            }
        }
        
        if("selectbook".equals(method)) {
            try{
            String fangshi=request.getParameter("fangshi");
            System.out.println("查询方式为："+fangshi);
            String xinxi=request.getParameter("xinxi");
            System.out.println(xinxi);
            if("1".equals(fangshi)) {
            java.util.List<School> list=sd.selecebookname(xinxi);
            
            request.setAttribute("list", list);
            System.out.println("listshow");
            request.getRequestDispatcher("selectshow.jsp").forward(request, response);
            }
            
            if("2".equals(fangshi)){
                java.util.List<School> list=sd.selectbook(xinxi);
            request.setAttribute("list", list);
            System.out.println("listshow");
            request.getRequestDispatcher("selectshow.jsp").forward(request, response);
            }
            
            

        }catch(Exception e){
            System.out.println("未能正确显示出图书信息");
            e.printStackTrace();
        }
    }
        
        if("showselectbook".equals(method)) {
            try{
            String fangshi=request.getParameter("fangshi");
            System.out.println("查询方式为："+fangshi);
            String xinxi=request.getParameter("xinxi");
            System.out.println(xinxi);
            if("1".equals(fangshi)) {
            java.util.List<School> list=sd.selecebookname(xinxi);
            
            request.setAttribute("list", list);
            System.out.println("listshow");
            request.getRequestDispatcher("stubookshow1.jsp").forward(request, response);
            }
            
            if("3".equals(fangshi)){
            java.util.List<School> list=sd.selectbook(xinxi);
            request.setAttribute("list", list);
            System.out.println("listshow");
            request.getRequestDispatcher("stubookshow1.jsp").forward(request, response);
            }
            
            

        }catch(Exception e){
            System.out.println("未能正确显示出图书信息");
            e.printStackTrace();
        }
    }
        
        
        
        
        if("jieyue".equals(method)) {
            
            Date date = new Date();
            SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");  
            System.out.println(formatter.format(date)); 
            String timenow=null;
            String timenext=null;
            timenow=formatter.format(date);
            System.out.println(timenow);
            timenext=getAfterMonth(timenow);
            System.out.println(timenext);
            HttpSession session=request.getSession();
            session.setAttribute("time", timenext);
            request.setAttribute("time",timenext);
            
            String bookID=(String) request.getSession().getAttribute("bookID");
            String bookname=(String) request.getSession().getAttribute("bookname");
            String author=(String) request.getSession().getAttribute("author");
            String banname=(String) request.getSession().getAttribute("banname");
            String booknum=(String) request.getSession().getAttribute("booknum");
            
            if(booknum.equals("0")) {
                request.getRequestDispatcher("select1.jsp").forward(request, response);
            }
            else {
            int booknum1=Integer.valueOf(booknum);
            --booknum1;
            String booknum2=String.valueOf(booknum1);
            
            School school=new School();
            school.setBookID(bookID);
            school.setBookname(bookname);
            school.setAuthor(author);
            school.setBanname(banname);
            school.setBooknum(booknum2);
            school.setStuID(stuID);
            school.setStuname(stuname);
            school.setStusex(stusex);
            school.setCollege(college);
            try{
            
            sd.bookadd(school,timenow,timenext);
            SchoolDaoImpl sd1=new SchoolDaoImpl();
            sd1.update(booknum2,bookID);
            
            System.out.println("listshow");
            
            request.getRequestDispatcher("time.jsp").forward(request, response);

        }catch(Exception e){
            System.out.println("未能正确显示出图书信息");
            e.printStackTrace();
        }
            }
    }
        
        if("showbook1".equals(method)) {
            try{
            
            java.util.List<School> list=sd.bookshow2(stuID);
            
            request.setAttribute("list", list);
            System.out.println("listshow");
            request.getRequestDispatcher("bookreturn.jsp").forward(request, response);

        }catch(Exception e){
            System.out.println("未能正确显示出图书信息");
            e.printStackTrace();
        }
    }
        if("guihuan".equals(method)) {
            String bookID=request.getParameter("bookID");
            try{
            
            sd.delete(bookID);
            
            
            System.out.println("listshow");
            request.getRequestDispatcher("Stuservlet?method=showbook1").forward(request, response);

        }catch(Exception e){
            System.out.println("未能正确显示出图书信息");
            e.printStackTrace();
        }
    }
        
        if("bookreturnshow".equals(method)) {
            try{
            
            java.util.List<School> list=sd.bookreturnshow(stuID);
            
            request.setAttribute("list", list);
            System.out.println("listshow");
            request.getRequestDispatcher("bookreturnshow.jsp").forward(request, response);

        }catch(Exception e){
            System.out.println("未能正确显示出图书信息");
            e.printStackTrace();
        }
    }
        
        
        
        
        
        
        
        
        
        
        
    }

    public static String  getAfterMonth(String inputDate) {
        Calendar c = Calendar.getInstance();//获得一个日历的实例   
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");   
        Date date = null;   
        try{   
            date = sdf.parse(inputDate);//初始日期   
        }catch(Exception e){  

        }   
        c.setTime(date);//设置日历时间   
        c.add(Calendar.MONTH,3);//在日历的月份上增加3个月
        String strDate = sdf.format(c.getTime());//的到你想要得3个月后的日期   
        return strDate;
}

    
    
    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }
    
    
    
}