为什么 Spring Boot 强迫我使用 Thymeleaf 模板

Question

我尝试在我的 Spring Boot 应用程序中转到登录页面，但出现此错误

Circular view path [/login.jsp]: would dispatch back to the current handler URL [/login.jsp] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)

在stackoverflow上人们给出需要添加百里香依赖的建议

('org.springframework.boot:spring-boot-starter-thymeleaf')

但在那之后我得到了这个错误

There was an unexpected error (type=Internal Server Error, status=500).
Error resolving template "login", template might not exist or might not be accessible by any of the configured Template Resolvers

这个错误表明Spring在/resurses/templates文件夹中找不到模板login.html。 如果我在另一个文件夹中有自己的 login.jsp 并且我不想使用任何模板，我该怎么办？

这是我的登录映射

    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public String login(Model model, String error, String logout) {

        if (error != null)
            model.addAttribute("error", "Your username and password is invalid.");

        if (logout != null)
            model.addAttribute("message", "You have been logged out successfully.");

        return "login";
    }

这是我的安全配置

 @Override
 protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
                    .antMatchers("/resources/**", "/registration").permitAll()
                    .anyRequest().authenticated()
                    .and()
                .formLogin()
                    .loginPage("/login")
                    .loginProcessingUrl("/login")
                    .permitAll()
                    .and()
                .logout()
                    .permitAll();
 }

Answer 1

简单，只需在控制器中为您的登录页面创建自己的映射：

@Controller
public class AppController{

    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public ModelAndView login(@RequestParam(value = "error", required = false) String error,
            @RequestParam(value = "logout", required = false) String logout, Model model, HttpServletRequest request) {

        ModelAndView view = new ModelAndView();
        if (error != null) {
            view.addObject("error", "Invalid username and password!");
        }

        if (logout != null) {
            view.addObject("msg", "You've been logged out successfully.");
        }

        view.setViewName("your-login-page");  
        return view;
    }
}

配置应该是这样的：

    @Override
            protected void configure(HttpSecurity http) throws Exception {
                http.authorizeRequests().and()
.formLogin().loginPage("/login").loginProcessingUrl("/login").failureUrl("/login?error")
        }

application.properties 文件应该如下所示：

spring.thymeleaf.suffix=.your-file-type
spring.thymeleaf.prefix=/WEB-INF/jsp-pages/

“/WEB-INF/jsp-pages/”是你的文件目录

Answer 2

Spring-Boot 不强迫你使用，它鼓励你。

您可以根据需要使用.jsp 页面，为此您需要：

1 - 将此添加到您的 MainClass.java

@Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(MainClass.class);
    }

2 - 将此添加到您的 application.properties

spring.mvc.view.prefix: /WEB-INF/jsp/
spring.mvc.view.suffix: .jsp

3 - 将您的.jsp 页面放在映射文件夹中，您可以使用.jsp 代替thymeleaf。