java无法注册我的自定义AbstractAnnotationConfigDispatcherServletInitializer

1 年 Questions & Answers 134

我正在尝试用嵌入式tomcat制作一个非常简单的spring mvc应用程序。我以为AbstractAnnotationConfigDispatcherServletInitializer是自动注册的，但我读到了一些相反的东西。因此，我还尝试将Main类标记为@Configuration，并添加一个函数来检索该类型的Bean

我希望从MEB-INF/views中获取带有“.jsp”后缀的视图，而不是从templates目录和“.html”后缀获取视图。我还想更改应用程序上下文

@SpringBootApplication
@ComponentScan("com.boraji.tutorial.spring")
public class Main {
    public static void main(String[] args){
        SpringApplication.run(Main.class, args);
    }
}


//second Main option I mentioned
@SpringBootApplication
@ComponentScan("com.boraji.tutorial.spring")
@Configuration
public class Main {
    public static void main(String[] args){
        SpringApplication.run(Main.class, args);
    }

    @Bean
    AbstractAnnotationConfigDispatcherServletInitializer webAppInitializer(){
        return new MyWebAppInitializer();
    }
}

public class MyWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[0];
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[]{WebConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
}

@Configuration
public class RootConfig {
}

@Configuration
@EnableWebMvc
@ComponentScan
public class WebConfig extends WebMvcConfigurerAdapter{
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }

    @Bean
    public InternalResourceViewResolver viewResolver(){
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        return resolver;
    }
}

@Controller
public class HelloWorldController {
    @RequestMapping(path={"/"},method= RequestMethod.GET)
    public String sayHello(Model model) {
        model.addAttribute("message","Hello Spring MVC!");

        //Java 8 LocalDate
        DateTimeFormatter formatter =    DateTimeFormatter.ofLocalizedDate(FormatStyle.FULL);
        LocalDate date = LocalDate.now();
        model.addAttribute("date", date.format(formatter));

        return "index";
    }
}

The view directory layout

application.properties为空。这是因为我尝试了各种配置

启动跟踪

 :: Spring Boot ::       (v1.5.10.RELEASE)
2018-03-04 19:43:47.211  INFO 1987 --- [           main] com.boraji.tutorial.spring.Main          : Starting Main v1.0-SNAPSHOT on javier-N56VZ with PID 1987 (/home/javier/test_src/springtest2/target/spring-test-2-1.0-SNAPSHOT.jar started by javier in /home/javier/test_src/springtest2)

2018-03-04 19:43:47.215  INFO 1987 --- [           main] com.boraji.tutorial.spring.Main          : No active profile set, falling back to default profiles: default

2018-03-04 19:43:47.549  INFO 1987 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@30946e09: startup date [Sun Mar 04 19:43:47 CET 2018]; root of context hierarchy

2018-03-04 19:43:48.880  INFO 1987 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)

2018-03-04 19:43:48.892  INFO 1987 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]

2018-03-04 19:43:48.893  INFO 1987 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.27

2018-03-04 19:43:48.974  INFO 1987 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext

2018-03-04 19:43:48.974  INFO 1987 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1429 ms

2018-03-04 19:43:49.055  INFO 1987 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]

2018-03-04 19:43:49.059  INFO 1987 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]

2018-03-04 19:43:49.179  INFO 1987 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/],methods=[GET]}" onto public java.lang.String com.boraji.tutorial.spring.controllers.HelloWorldController.sayHello(org.springframework.ui.Model)

2018-03-04 19:43:49.180  INFO 1987 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/bye]}" onto public java.lang.String com.boraji.tutorial.spring.controllers.ByeController.bye()

2018-03-04 19:43:49.188  INFO 1987 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)

2018-03-04 19:43:49.188  INFO 1987 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)

2018-03-04 19:43:49.218  INFO 1987 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler]

2018-03-04 19:43:49.256  INFO 1987 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@30946e09: startup date [Sun Mar 04 19:43:47 CET 2018]; root of context hierarchy

2018-03-04 19:43:50.113  INFO 1987 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup

2018-03-04 19:43:50.180  INFO 1987 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)

2018-03-04 19:43:50.186  INFO 1987 --- [           main] com.boraji.tutorial.spring.Main          : Started Main in 3.308 seconds (JVM running for 3.697)

==POM===

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.10.RELEASE</version>
</parent>

<dependencies>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.3.7.RELEASE</version>
</dependency>


<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.3.14.RELEASE</version>
</dependency>

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

<!-- JSTL Dependency-->
<dependency>
    <groupId>javax.servlet.jsp.jstl</groupId>
    <artifactId>javax.servlet.jsp.jstl-api</artifactId>
    <version>1.2.1</version>
</dependency>

<dependency>
    <groupId>taglibs</groupId>
    <artifactId>standard</artifactId>
    <version>1.1.2</version>
</dependency>

<!-- Servlet Dependency -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <scope>provided</scope>
</dependency>

<!-- JSP Dependency -->
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>javax.servlet.jsp-api</artifactId>
    <version>2.3.1</version>
    <scope>provided</scope>
</dependency>

</dependencies>
<build>
<plugins>
    <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.5.1</version>
        <configuration>
            <source>1.8</source>
            <target>1.8</target>
        </configuration>
    </plugin>

    <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
    </plugin>
</plugins>
</build>

Tags:

共 (2) 个答案

# 1 楼答案

首先，我强烈建议不要使用JSP作为视图层，而是使用类似Thymeleaf的东西。在Spring Boot中使用JSP时，必须考虑certain limitations

也就是说，你让事情变得过于复杂。让它发挥作用

删除RootConfig类

删除WebConfig类

移除MyWebAppInitializer

从Main类中删除@ComponentScan和@Configuration

将Main类移动到com.boraji.tutorial

从pom.xml中删除普通的org.springframework依赖项，并改用spring-boot-starter-web

移除maven-compiler-plugin

将spring-boot-starter-tomcat依赖项添加为provided依赖项

将spring.mvc.view.prefix和spring.mvc.view.suffix添加到application.properties

基本上，这会将Main类简化为类似的内容

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

你对这种东西的依赖

<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <! JSTL Dependency > <dependency> <groupId>javax.servlet.jsp.jstl</groupId> <artifactId>javax.servlet.jsp.jstl-api</artifactId> <version>1.2.1</version> </dependency> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>1.1.2</version> </dependency> <! JSP Dependency > <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>javax.servlet.jsp-api</artifactId> <version>2.3.1</version> <scope>provided</scope> </dependency> </dependencies>

还要确保使用<packaging>war</packaging>作为pom的类型，并使用<properties>部分来设置java版本，而不是maven-compiler-plugin

<properties> <java.version>1.8</java.version> </properties>

最后将suffix和prefix添加到application.properties中

spring.mvc.view.prefix=/WEB-INF/views/ spring.mvc.view.suffix=.jsp

现在，这也将使您的应用程序只使用JSP（尽管在依赖项列表中仍然有Thymeleaf依赖项）

要获得更多灵感（或缺少依赖项），您可能需要看看Spring Boot中的JSP Sample

# 2 楼答案

尝试移动应用程序。资源下的属性，但不是WEB-INF。此外，最好有错误堆栈跟踪

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java无法注册我的自定义AbstractAnnotationConfigDispatcherServletInitializer

共 (2) 个答案

# 1 楼答案

# 2 楼答案