查看未检测到并抛出白标错误（Spring Boot Application）

时间：2016-09-05 03:04:09

标签： java spring-mvc spring-boot

我刚刚开始学习spring boot，并创建了一个小型的spring mvc应用程序。但是当我尝试访问视图时，我收到白标错误，但是如果我只是使用responseBody注释返回字符串，则应用程序正常工作。我还将百里香加入了依赖。

项目结构： enter image description here 

demo2
|-- src/main/java
|   |-- example
|   |   `-- Demo2Application
|   |-- controller
|   |   `-- Controller
|   `-- model
|       `-- Person
`-- src/main/resources
    `-- templates
        `-- personView.html

这是我的pom.xml 

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.demo</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo2</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

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

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

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

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


</project>

应用程序配置主要方法：

@Configuration
@EnableAutoConfiguration
@ComponentScan({"com", "example", "controller"})
public class Demo2Application {


    public static void main(String[] args) {
        SpringApplication.run(Demo2Application.class, args);
    }
}

控制器类：

@Controller
public class PersonController {

    @RequestMapping("/person")
    public String getPerson(Model model) {
        Person person = new Person();

        person.setFirstname("John");
        person.setLastName("Carter");
        person.setAge(25);
        model.addAttribute(person);

        return "personView";
    }

    @RequestMapping("/test")
    public @ResponseBody String test() {
        return "hello world";
    }

    @ResponseBody
    @RequestMapping("/")
    String entry() {
        return "Welcome to Spring Boot Application";
    }
}

查看页面：

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8"></meta>
<title>Insert title here</title>
</head>
<body>

    FirstName : <span th:text="${person.firstName}"></span>
    LastName : <span th:text="${person.lastName}"></span>
    Age : <span th:text="${person.age}"></span>
</body>
</html>

错误：

Whitelabel Error Page

    This application has no explicit mapping for /error, so you are seeing this as a fallback.

    Sun Sep 04 22:45:31 EDT 2016
    There was an unexpected error (type=Not Found, status=404).
    No message available

日志：

2016-09-04 22:43:10.330  INFO 11356 --- [           main] com.example.Demo2Application             : Starting Demo2Application on Sais-MacBook-Pro.local with PID 11356 (/Users/sainishankbojja/Documents/workspace-sts-3.8.1.RELEASE/demo2/target/classes started by sainishankbojja in /Users/sainishankbojja/Documents/workspace-sts-3.8.1.RELEASE/demo2)
2016-09-04 22:43:10.334  INFO 11356 --- [           main] com.example.Demo2Application             : No active profile set, falling back to default profiles: default
2016-09-04 22:43:10.370  INFO 11356 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@a9cd3b1: startup date [Sun Sep 04 22:43:10 EDT 2016]; root of context hierarchy
2016-09-04 22:43:11.353  INFO 11356 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2016-09-04 22:43:11.365  INFO 11356 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat
2016-09-04 22:43:11.366  INFO 11356 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.4
2016-09-04 22:43:11.430  INFO 11356 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2016-09-04 22:43:11.430  INFO 11356 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1063 ms
2016-09-04 22:43:11.558  INFO 11356 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]
2016-09-04 22:43:11.561  INFO 11356 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2016-09-04 22:43:11.562  INFO 11356 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2016-09-04 22:43:11.562  INFO 11356 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2016-09-04 22:43:11.562  INFO 11356 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2016-09-04 22:43:11.786  INFO 11356 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@a9cd3b1: startup date [Sun Sep 04 22:43:10 EDT 2016]; root of context hierarchy
2016-09-04 22:43:11.834  INFO 11356 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/test]}" onto public java.lang.String controller.PersonController.test()
2016-09-04 22:43:11.835  INFO 11356 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/]}" onto java.lang.String controller.PersonController.entry()
2016-09-04 22:43:11.835  INFO 11356 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/person]}" onto public java.lang.String controller.PersonController.getPerson(org.springframework.ui.Model)
2016-09-04 22:43:11.837  INFO 11356 --- [           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)
2016-09-04 22:43:11.837  INFO 11356 --- [           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)
2016-09-04 22:43:11.860  INFO 11356 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-09-04 22:43:11.860  INFO 11356 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-09-04 22:43:11.885  INFO 11356 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-09-04 22:43:11.990  INFO 11356 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2016-09-04 22:43:12.035  INFO 11356 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2016-09-04 22:43:12.038  INFO 11356 --- [           main] com.example.Demo2Application             : Started Demo2Application in 12.204 seconds (JVM running for 12.492)
2016-09-04 22:43:15.931  INFO 11356 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet'
2016-09-04 22:43:15.931  INFO 11356 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started
2016-09-04 22:43:15.941  INFO 11356 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 10 ms

0 个答案:

没有答案
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