Spring Boot Whitelabel错误页面(类型=找不到，状态= 404) [英] Spring Boot Whitelabel Error page (type=Not Found, status=404)

问题描述

下午好！我正在开始春季学习，我以相同的方式遵循教程，但是它返回错误:

Good afternoon! I'm starting spring studies, I'm following a tutorial the same way, but it returns an error:

文件夹结构:

奇怪的是:如果我将"EventoController.java"插入br.com.SpringApp.SpringApp，它将正常工作.

The strange thing is: If I insert the "EventoController.java" into br.com.SpringApp.SpringApp, it works correctly.

package br.com.SpringApp.SpringApp;

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

@SpringBootApplication
public class SpringAppApplication {

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

.

package br.com.SpringApp.controller;

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

@Controller
public class EventoController {

    @RequestMapping("/cadastroEvento")
    public String form() {      
        return "evento/formEvento"; 
    }

}

根据要求，我要添加pom.xml

As requested, I'm adding 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>br.com.SpringApp</groupId>
    <artifactId>SpringApp</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

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

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.10.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-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

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

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


   </project>

有人可以告诉我我错了吗?

Can someone tell me where I'm wrong, please?

推荐答案

请确保您的主类位于其他类之上的根包中.

Make sure that your main class is in a root package above other classes.

当您运行Spring Boot应用程序(即带有@SpringBootApplication注释的类)时，Spring将仅扫描主类包下方的类.

When you run a Spring Boot Application, (i.e. a class annotated with @SpringBootApplication), Spring will only scan the classes below your main class package.

所以您的声明是这样的

程序包br.com.SpringApp.SpringApp; 在这个主类中，即SpringAppApplication

package br.com.SpringApp.SpringApp; inside this main class i.e SpringAppApplication

程序包br.com.SpringApp.SpringApp.controller; 控制器的名称，即EventoController&indexControllers

package br.com.SpringApp.SpringApp.controller; name of your controllers i.e EventoController & indexControllers

程序包br.com.SpringApp.SpringApp.model; 您的模型名称，即Evento

package br.com.SpringApp.SpringApp.model; name of your models i.e Evento

此后清理项目并重新运行spring boot应用程序；

After This clean your project and re-run spring boot application;

这篇关于Spring Boot Whitelabel错误页面(类型=找不到，状态= 404)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！