javaweb实现图书管理系统 源代码

以下是一个基于javaweb的图书管理系统的源代码示例：

// 省略了部分代码

// 登录功能
public class LoginServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String username = request.getParameter("username");        String password = request.getParameter("password");
        User user = new UserDao().login(username, password);
        if (user != null) {
            HttpSession session = request.getSession();
            session.setAttribute("user", user);
            response.sendRedirect("index.jsp");
        } else {
            response.sendRedirect("login.jsp?error=1");
        }
    }
}

// 添加图书功能
public class AddBookServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String bookName = request.getParameter("bookName");
        String author = request.getParameter("author");
        String publisher = request.getParameter("publisher");
        String price = request.getParameter("price");
        Book book = new Book(bookName, author, publisher, Double.parseDouble(price));
        new BookDao().addBook(book);
        response.sendRedirect("bookList.jsp");
    }
}

// 模糊搜索功能
public class SearchBookServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String keyword = request.getParameter("keyword");
        List<Book> bookList = new BookDao().searchBook(keyword);
        request.setAttribute("bookList", bookList);
        request.getRequestDispatcher("bookList.jsp").forward(request, response);
    }
}

// 借书功能
public class BorrowBookServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String[] bookIds = request.getParameterValues("bookId");
        User user = (User) request.getSession().getAttribute("user");
        new BorrowDao().borrowBook(user.getUserId(), bookIds);
        response.sendRedirect("borrowList.jsp");
    }
}

// 还书功能
public class ReturnBookServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String[] borrowIds = request.getParameterValues("borrowId");
        new BorrowDao().returnBook(borrowIds);
        response.sendRedirect("borrowList.jsp");
    }
}