【发布时间】：2020-04-06 08:08:09
【问题描述】：
我有一个简单的 Spring Boot 项目，它只包含两个页面。 我需要实现 H2 数据库和控制台来进行项目。
application.properties
spring.datasource.url=jdbc:h2:temdb
spring.datasource.username=sa
spring.datasource.password=
spring.datasource.driver-class-name=org.h2.Driver
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
spring.jpa.hibernate.ddl-auto=create
spring.h2.console.enabled=true
spring.h2.console.path=/h2
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true
data.sql:
DROP TABLE IF EXISTS billionaires;
CREATE TABLE billionaires (
id INT AUTO_INCREMENT PRIMARY KEY,
first_name VARCHAR(250) NOT NULL,
last_name VARCHAR(250) NOT NULL,
career VARCHAR(250) DEFAULT NULL
);
INSERT INTO billionaires (first_name, last_name, career) VALUES
('Aliko', 'Dangote', 'Billionaire Industrialist'),
('Bill', 'Gates', 'Billionaire Tech Entrepreneur'),
('Folrunsho', 'Alakija', 'Billionaire Oil Magnate');
pom.xml
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.15.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.0.15.RELEASE</version>
</dependency>
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.29</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>5.0.15.RELEASE</version>
</dependency>
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf-spring4</artifactId>
<version>3.0.11.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>2.2.2.RELEASE</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.199</version>
</dependency>
</dependencies>
当我尝试启动应用程序并转到http://localhost:8080/h2 打开 h2 控制台时，出现 404 错误。
服务器输出：
00:25:21.079 [http-nio-8080-exec-6] DEBUG org.springframework.web.servlet.DispatcherServlet - DispatcherServlet with name 'dispatcher' processing GET request for [/h2]
00:25:21.079 [http-nio-8080-exec-6] DEBUG org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Looking up handler method for path /h2
00:25:21.079 [http-nio-8080-exec-6] DEBUG org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Did not find handler method for [/h2]
00:25:21.079 [http-nio-8080-exec-6] WARN org.springframework.web.servlet.PageNotFound - No mapping found for HTTP request with URI [/h2] in DispatcherServlet with name 'dispatcher'
00:25:21.079 [http-nio-8080-exec-6] DEBUG org.springframework.web.servlet.DispatcherServlet - Successfully completed request
是什么原因？
public class WebAppInitializer implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
context.register(WebConfig.class);
context.setServletContext(servletContext);
ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher", new DispatcherServlet(context));
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("/");
}
}
@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "ru.rsreu.controller")
public class WebConfig extends SpringStandardDialect {
@Bean
@Description("Thymeleaf View Resolver")
public ThymeleafViewResolver viewResolver() {
ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
viewResolver.setTemplateEngine(templateEngine());
viewResolver.setOrder(1);
return viewResolver;
}
@Bean
@Description("Spring Message Resolver")
public ResourceBundleMessageSource messageSource() {
ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
messageSource.setBasename("user");
return messageSource;
}
@Bean
public SpringResourceTemplateResolver templateResolver() {
SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();
templateResolver.setPrefix("/WEB-INF/views/");
templateResolver.setSuffix(".html");
templateResolver.setCacheable(true);
return templateResolver;
}
@Bean
public SpringTemplateEngine templateEngine() {
SpringTemplateEngine templateEngine = new SpringTemplateEngine();
templateEngine.setTemplateResolver(templateResolver());
// templateEngine.setEnableSpringELCompiler(true);
return templateEngine;
}
}
【问题讨论】：
标签： java spring spring-boot spring-mvc h2