Java 實戰項目錘煉之網上圖書館管理系統的實現流程

用戶登陸模塊:
 
@Controller
public class LoginController {
 
    private LoginService loginService;
 
 
    @Autowired
    public void setLoginService(LoginService loginService) {
        this.loginService = loginService;
    }
 
 
    @RequestMapping(value = {"/", "/login.html"})
    public String toLogin(HttpServletRequest request) {
        request.getSession().invalidate();
        return "index";
    }
 
    @RequestMapping("/logout.html")
    public String logout(HttpServletRequest request) {
        request.getSession().invalidate();
        return "redirect:/login.html";
    }
 
 
    //負責處理loginCheck.html請求
    //請求參數會根據參數名稱默認契約自動綁定到相應方法的入參中
    @RequestMapping(value = "/api/loginCheck", method = RequestMethod.POST)
    public @ResponseBody
    Object loginCheck(HttpServletRequest request) {
        long id = Long.parseLong(request.getParameter("id"));
        String passwd = request.getParameter("passwd");
        boolean isReader = loginService.hasMatchReader(id, passwd);
        boolean isAdmin = loginService.hasMatchAdmin(id, passwd);
        HashMap<String, String> res = new HashMap<>();
        if (isAdmin) {
            Admin admin = new Admin();
            admin.setAdminId(id);
            admin.setPassword(passwd);
            String username = loginService.getAdminUsername(id);
            admin.setUsername(username);
            request.getSession().setAttribute("admin", admin);
            res.put("stateCode", "1");
            res.put("msg", "管理員登陸成功！");
        } else if (isReader) {
            ReaderCard readerCard = loginService.findReaderCardByReaderId(id);
            request.getSession().setAttribute("readercard", readerCard);
            res.put("stateCode", "2");
            res.put("msg", "讀者登陸成功！");
        } else {
            res.put("stateCode", "0");
            res.put("msg", "賬號或密碼錯誤！");
        }
        return res;
    }
 
    @RequestMapping("/admin_main.html")
    public ModelAndView toAdminMain(HttpServletResponse response) {
        return new ModelAndView("admin_main");
    }
 
    @RequestMapping("/reader_main.html")
    public ModelAndView toReaderMain(HttpServletResponse response) {
        return new ModelAndView("reader_main");
    }
 
    @RequestMapping("/admin_repasswd.html")
    public ModelAndView reAdminPasswd() {
        return new ModelAndView("admin_repasswd");
    }
 
    @RequestMapping("/admin_repasswd_do")
    public String reAdminPasswdDo(HttpServletRequest request, String oldPasswd, String newPasswd, String reNewPasswd, RedirectAttributes redirectAttributes) {
        Admin admin = (Admin) request.getSession().getAttribute("admin");
        long id = admin.getAdminId();
        String password = loginService.getAdminPassword(id);
        if (password.equals(oldPasswd)) {
            if (loginService.adminRePassword(id, newPasswd)) {
                redirectAttributes.addFlashAttribute("succ", "密碼修改成功！");
                return "redirect:/admin_repasswd.html";
            } else {
                redirectAttributes.addFlashAttribute("error", "密碼修改失敗！");
                return "redirect:/admin_repasswd.html";
            }
        } else {
            redirectAttributes.addFlashAttribute("error", "舊密碼錯誤！");
            return "redirect:/admin_repasswd.html";
        }
    }
 
    @RequestMapping("/reader_repasswd.html")
    public ModelAndView reReaderPasswd() {
        return new ModelAndView("reader_repasswd");
    }
 
    @RequestMapping("/reader_repasswd_do")
    public String reReaderPasswdDo(HttpServletRequest request, String oldPasswd, String newPasswd, String reNewPasswd, RedirectAttributes redirectAttributes) {
        ReaderCard reader = (ReaderCard) request.getSession().getAttribute("readercard");
        long id = reader.getReaderId();
        String password = loginService.getReaderPassword(id);
        if (password.equals(oldPasswd)) {
            if (loginService.readerRePassword(id, newPasswd)) {
                redirectAttributes.addFlashAttribute("succ", "密碼修改成功！");
                return "redirect:/reader_repasswd.html";
            } else {
                redirectAttributes.addFlashAttribute("error", "密碼修改失敗！");
                return "redirect:/reader_repasswd.html";
            }
        } else {
            redirectAttributes.addFlashAttribute("error", "舊密碼錯誤！");
            return "redirect:/reader_repasswd.html";
        }
    }
 
    //配置404頁面
    @RequestMapping("*")
    public String notFind() {
        return "404";
    }
 
}

靜態資源和攔截器配置:
 
@Configuration
@EnableWebMvc
@ComponentScan("com.library.controller")
public class WebConfig extends WebMvcConfigurerAdapter {
 
    @Bean
    public ViewResolver viewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setSuffix(".jsp");
        return resolver;
    }
 
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }
 
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/img/**")
                .addResourceLocations("/static/img/");
        registry.addResourceHandler("/js/**").addResourceLocations("/static/js/");
        registry.addResourceHandler("/css/**").addResourceLocations("/static/css/");
    }
}