弹簧靴白标签错误页面(类型=未找到,状态=404)

2022-09-02 05:25:59

下午好!我正在开始春季学习,我正在以同样的方式遵循教程,但它返回了一个错误:

enter image description here

文件夹结构:

enter image description here

奇怪的是:如果我将“EventoController.java”插入br.com.SpringApp.SpringApp,它可以正常工作。

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,我正在添加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在哪里吗?


答案 1

确保主类位于其他类之上的根包中。

当您运行Spring Boot应用程序(即用@SpringBootApplication注释的类)时,Spring将仅扫描主类包下面的类。

所以你的声明是这样的

package br.com.SpringApp.SpringApp;在这个主要类中,即SpringAppApplication

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

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

之后,清理您的项目并重新运行弹簧启动应用程序;


答案 2

解决方案:如果在 Controller 类上使用,则它将被视为 MVC 控制器类。但是,如果您希望在RESTFul Web服务中使用特殊的控制器,那么您可以与注释一起使用,或者您可以直接在类上使用。它对我有用,因为我在使用RestFul Webservices创建SpringBoot项目时遇到了相同的错误。@Controller@Controller@ResponseBody@RestControllerController

package br.com.SpringApp.controller;

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

@Controller
public class EventoController {

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

}

艺术

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

@RestController
public class EventoController {

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

}

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