无法运行支持Thymeleaf的Spring Boot WebMVC

Question

我已经搜索了很多，但我没有找到我的问题的答案，所以我把我的问题贴在这里。请看一看，并提出解决方案，我错了。

我已经使用spring工具套件（STS）创建了spring boot web mvc项目，该项目支持thymeleaf。当我运行它时，给我“白标签错误页面”页面。这意味着找不到映射。

努力：

网络配置。JAVA

package com.springthymeleaf.config;

import org.springframework.boot.context.embedded.ServletRegistrationBean;
import org.springframework.context.MessageSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ReloadableResourceBundleMessageSource;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.thymeleaf.spring4.SpringTemplateEngine;
import org.thymeleaf.spring4.view.ThymeleafViewResolver;
import org.thymeleaf.templateresolver.ServletContextTemplateResolver;

@Configuration
@ComponentScan("com.springthymeleaf")
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter  {

    @Bean
    ServletRegistrationBean servletRegistration(){
        ServletRegistrationBean registrationBean = new ServletRegistrationBean();
        registrationBean.addUrlMappings("/console/*");
        return registrationBean;
    }

    //start Thymeleaf specific configuration
    @Bean(name ="templateResolver") 
    public ServletContextTemplateResolver getTemplateResolver() {
        ServletContextTemplateResolver templateResolver = new ServletContextTemplateResolver();
//      templateResolver.setPrefix("/templates/");
        templateResolver.setSuffix(".html");
        templateResolver.setTemplateMode("XHTML");
    return templateResolver;
    }
    @Bean(name ="templateEngine")       
    public SpringTemplateEngine getTemplateEngine() {
        SpringTemplateEngine templateEngine = new SpringTemplateEngine();
        templateEngine.setTemplateResolver(getTemplateResolver());
    return templateEngine;
    }
    @Bean(name="viewResolver")
    public ThymeleafViewResolver getViewResolver(){
        ThymeleafViewResolver viewResolver = new ThymeleafViewResolver(); 
        viewResolver.setTemplateEngine(getTemplateEngine());
    return viewResolver;
    }
    //end Thymeleaf specific configuration
    @Bean(name ="messageSource")
    public MessageSource getMessageSource() {
        ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
        messageSource.setBasename("/WEB-INF/i18/thymeleafResource");
        messageSource.setDefaultEncoding("UTF-8");
        return messageSource;
    }
}

安全Configuration.java

package com.springthymeleaf.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

@Configuration
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity.authorizeRequests().antMatchers("/").permitAll();
    }
}

ServletInitializer。JAVA

package com.springthymeleaf;

import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;

public class ServletInitializer extends SpringBootServletInitializer {

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

}

SpringThymeLeafApplication.java

package com.springthymeleaf;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringThymeLeafApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringThymeLeafApplication.class, args);
    }
}

IndexController.java

package com.springthymeleaf.controllers;


import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class IndexController {

    @RequestMapping("/")
    public String index(){
        return "index";
    }
}

我已经创建了索引。html文件，位于resources/templates文件夹中。但我还是犯了那个错误。我在网上搜索了很多，但没有找到线索。请有人帮帮我。

Answer 1

当您添加thymeleaf依赖项时，Spring boot会执行所有自动配置。那么你应该做以下事情。

>

删除您在WebConfig.java上的所有thymeleaf配置

如果您使用Maven，请确保您的pom.xml有以下依赖项，否则如果您使用gradle，请检查Spring网站上的等效项：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

第三，确保扫描控制器的位置，在SpringEleaf应用程序中添加以下内容。爪哇：

@ComponentScan（base Packages="your.path.to.controllers"）

最后，你必须添加你的。html文件到资源/模板

Answer 2

Spring Boot已经为您配置了Thymeleaf，所以无需手动配置。删除所有与Thymeleaf相关的配置，同时删除@EnableWebMvc，因为这会干扰Spring Boot自动配置。@ComponentScan也是冗余的。

Spring Boot还为您注册了一个MessageSource，所以不需要配置它。不知道您要做什么servlet注册，但这是你唯一需要的。

我还建议删除您的控制器，并使用一个视图控制器，您可以在您的WebConfig类中配置该控制器。

@Configuration
public class WebConfig extends WebMvcConfigurerAdapter  {

    @Bean
    ServletRegistrationBean servletRegistration(){
        ServletRegistrationBean registrationBean = new ServletRegistrationBean();
        registrationBean.addUrlMappings("/console/*");
        return registrationBean;
    }

    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("/").setViewName("index");
    }
}

要让自动配置的消息源拾取自定义包，请将以下内容添加到src/main/resources/application。属性。

spring.messages.basename=/WEB-INF/i18/thymeleafResource

我还建议简单地让springbootservletializer扩展springbootservletializer。

@SpringBootApplication
public class SpringThymeLeafApplication extends SpringBootServletInitializer {

    public static void main(String[] args) {
        SpringApplication.run(SpringThymeLeafApplication.class, args);
    }

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

还要确保模板在src/main/resources/templates中，而不是在src/main/resources/resources/templates中，否则这些模板将找不到。

Answer 3

实际上，Spring Boot配置了Thymeleaf。它应该与以下设置一起工作：

@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter
{
    @Override
    protected void configure(HttpSecurity http) throws Exception
    {
        http
            .authorizeRequests()
                .anyRequest().authenticated()
                .and()
            .formLogin().loginPage("/login").defaultSuccessUrl("/").permitAll() // http://docs.spring.io/spring-security/site/docs/4.0.3.RELEASE/reference/htmlsingle/#jc-form
                .and()
            .logout().permitAll(); // http://docs.spring.io/spring-security/site/docs/4.0.3.RELEASE/reference/htmlsingle/#jc-logout
    }

    @Override
    public void configure(WebSecurity web) throws Exception
    {
        web
            .ignoring()
                .antMatchers("/resources/**"/*, ... */);
    }
}

@Controller
public class LoginController
{
    @RequestMapping("/login")
    static String login(Model model)
    {
        return "login";
    }
}