源码获取：博客首页 "资源" 里下载！

一、项目简述

功能： 区分为管理员用户和普通用户，普通用户：用户登录，个 人信息修改，图书查询，用户借阅，用户归还，管理员用 户：图书馆里，归还管理，借阅信息查询，图书维护，分 类管理，读者管理等等功能。

二、项目运行

环境配置： Jdk1.8 + Tomcat8.5 + mysql + Eclispe (IntelliJ IDEA,Eclispe,MyEclispe,Sts 都支持)

项目技术： JSP + Servlert + html+ css + JavaScript + JQuery + Ajax等等。

读者信息控制层：

/**
 * Servlet implementation class updateUserServlet
 */@WebServlet("/updateUserServlet")publicclassupdateUserServletextendsHttpServlet {
	privatestaticfinallongserialVersionUID=1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */publicupdateUserServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protectedvoiddoGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
		// TODO Auto-generated method stub//		response.getWriter().append("Served at: ").append(request.getContextPath());
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protectedvoiddoPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
		// TODO Auto-generated method stub//		doGet(request, response);
		//修改读者的信息
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html;charset=UTF-8");
		Stringusername= request.getParameter("username");
		Stringpassword= request.getParameter("password");
		Stringname= request.getParameter("name");
		Stringemail= request.getParameter("email");
		Stringphone= request.getParameter("phone");
		intlend_num= Integer.parseInt(request.getParameter("lend_num"));
		intmax_num= Integer.parseInt(request.getParameter("max_num"));
		intaid= Integer.parseInt(request.getParameter("aid"));
		AdminDaouserdao=newAdminDao();
		userdao.updateUser(aid,username,password,name,email,phone,lend_num,max_num);
        response.sendRedirect("/books/admin_user.jsp");
	}

}

图书信息控制层：

/**
 * Servlet implementation class updateBookServlet
 */@WebServlet("/updateBookServlet")publicclassupdateBookServletextendsHttpServlet {
	privatestaticfinallongserialVersionUID=1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */publicupdateBookServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protectedvoiddoGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
		// TODO Auto-generated method stub//		response.getWriter().append("Served at: ").append(request.getContextPath());
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protectedvoiddoPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
		// TODO Auto-generated method stub//		doGet(request, response);
		//修改图书信息
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html;charset=UTF-8");
		Stringcard= request.getParameter("card");
		Stringname= request.getParameter("name");
		Stringtype= request.getParameter("type");
		Stringautho= request.getParameter("autho");
		Stringpress= request.getParameter("press");
		intnum= Integer.parseInt(request.getParameter("num"));
		intbid= Integer.parseInt(request.getParameter("updatebid"));
		BookDaobookdao=newBookDao();
		bookdao.updateBook(bid,card,name,type,autho,press,num);
		response.sendRedirect("/books/admin_book.jsp");
	}

}

登录信息控制层：

/**
 * Servlet implementation class LoginServlet
 */@WebServlet("/LoginServlet")publicclassLoginServletextendsHttpServlet {
	privatestaticfinallongserialVersionUID=1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */publicLoginServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protectedvoiddoGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
		// TODO Auto-generated method stub//		response.getWriter().append("Served at: ").append(request.getContextPath());
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protectedvoiddoPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
		// TODO Auto-generated method stub//		doGet(request, response);
		//登录的判断
		PrintWriterout= response.getWriter();
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html;charset=UTF-8");
		//获取账号和密码
		Stringusername= request.getParameter("username");
		Stringpassword= request.getParameter("password");
		AdminDaouserdao=newAdminDao();
		//对账号和密码进行判断
		booleanresult= userdao.Login_verify(username, password);
		HttpSessionsession= request.getSession();
		//判断输入正确
		if(result){
			AdminBeanadminbean=newAdminBean();
			AdminDaoadmindao=newAdminDao();
			//更加账号和密码查找出读者的信息
			adminbean = admindao.getAdminInfo(username,password);
			//将aid存入session中
			session.setAttribute("aid", ""+adminbean.getAid());
			//设置session的失效时间
			session.setMaxInactiveInterval(6000);
			//根据status的值来判断是管理员，还是读者，status=1为读者
			if(adminbean.getStatus()==1){
				response.sendRedirect("/books/index2.jsp");
			}else{
				response.sendRedirect("/books/admin.jsp");
			}
		}else{
			//没有找到对应的账号和密码，返回重新登录
			session.setAttribute("state", "密码错误");
			response.sendRedirect("/books/login.jsp");
		}
	}

}

管理员信息控制层：

/**
 * Servlet implementation class AdminServlet
 */@WebServlet("/AdminServlet")publicclassAdminServletextendsHttpServlet {
	privatestaticfinallongserialVersionUID=1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */publicAdminServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protectedvoiddoGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
		// TODO Auto-generated method stub//		response.getWriter().append("Served at: ").append(request.getContextPath());
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protectedvoiddoPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
		// TODO Auto-generated method stub//		doGet(request, response);
		PrintWriterout= response.getWriter();
		//设置编码类型
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html;charset=UTF-8");
		BookDaobookdao=newBookDao();
		//这里为了简单，设置了tip，用来区分是修改密码功能，还是修改个人资料的功能，tip=1为修改密码
		inttip= Integer.parseInt(request.getParameter("tip"));
		//获取发起请求页面的文件名称，这个在对应的jsp里面的表单填写，修改完成后就可以直接返回对应的页面
		Stringurl= request.getParameter("url");
		HttpSessionsession= request.getSession();
		AdminBeanadminbean=newAdminBean();
		//获取存到session的aid
		Stringaid= (String) session.getAttribute("aid");
		AdminDaoadmindao=newAdminDao();
		//通过aid获取到读者的信息
		adminbean = admindao.get_AidInfo2(aid);
		//修改密码
		if(tip==1){
			//获取到输入的旧密码，新密码
			Stringpassword= request.getParameter("password");
			Stringpassword2= request.getParameter("password2");
			//获取读者数据表中的密码
			Stringold_password= adminbean.getPassword();
			//对旧密码进行比较，如果相同就修改，不相同就直接退出
			if(old_password.equals(password)){
				admindao.updateUser(adminbean.getAid(), adminbean.getUsername(), password2, adminbean.getName(),
						adminbean.getEmail(), adminbean.getPhone(), adminbean.getLend_num(), adminbean.getMax_num());
				response.sendRedirect("/books/"+url+".jsp");
			}else{
				out.write("<script type='text/javascript'>alert('password error');location.href='"+url+".jsp';  </script>");
				
			}
		}else{
			//修改个人资料
			//获取输入的信息
			Stringname= request.getParameter("name");
			Stringemail= request.getParameter("email");
			Stringphone= request.getParameter("phone");
			//修改输入的信息到数据表中
			admindao.updateUser(adminbean.getAid(), adminbean.getUsername(), adminbean.getPassword(), name,
					email, phone, adminbean.getLend_num(), adminbean.getMax_num());
			response.sendRedirect("/books/"+url+".jsp");
		}
	}

}

源码获取：博客首页 "资源" 里下载！