接收 404 运行弹簧靴

Posted 2023-02-27

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【中文标题】接收 404 运行弹簧靴【英文标题】：Receiving a 404 running spring boot 【发布时间】：2016-02-16 15:47:02 【问题描述】：

您好，我是 Spring 新手，尝试使用 Spring Boot 时收到 404 错误。尝试在浏览器中查看 url 时，我不断收到 404 错误。请有人协助并指出我出了什么问题。我在控制器中放置了一个调试器来打印 HH，但我观察到它永远不会进入控制器，因为它无法在控制台上打印“HH”。我也从控制台注意到了这一点：

:50.894  INFO 11249 --- [lication.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)
2015-11-15 07:11:50.894  INFO 11249 --- [lication.main()] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "[/error],produces=[text/html]" onto public org.springframework.web.servlet.ModelAndView org.springframework.

下面是我的控制器：

@RestController
public class TestController 

    @RequestMapping(value="/person")
    public String intro()
        System.out.println("HH");
        return "index";

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.springExample.www</groupId>
    <artifactId>Hotel-Management</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.2.7.RELEASE</version>
    </parent>

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

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


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

MainApplication.java：

@SpringBootApplication
public class MainApplication 

    public static void main(String[] args) 

            SpringApplication.run(MainApplication.class, args);

index.html 定义在 src/main/resources/templates:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initialscale=1">
    <title>Bootstrap 101 Template</title>

    <!-- Bootstrap -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" integrity="sha512-dTfge/zgoMYpP7QbHy4gWMEGsbsdZeCXz7irItjcC3sPUFtf0kuFbDz/ixG7ArTxmDjLXDmezHubeNikyKGVyQ==" crossorigin="anonymous">

    <!-- HTML5 Shim and Respond.js IE8 support of HTML5
   elements and media queries -->
    <!-- WARNING: Respond.js doesn't work if you view the
   page via file:// -->
    <!--[if lt IE 9]>
    <script src="https://oss.maxcdn.com/libs/html5shiv/
3.7.0/html5shiv.js"></script>
    <script src="https://oss.maxcdn.com/libs/respond.js/
1.4.2/respond.min.js"></script>
    <![endif]-->

    <style>

        .box 

            background-color:#d3d3d3

        

    </style>
</head>
<body>
<h1>Hello, world!</h1>

<div class="container">

    <div class="row">

        <div class="col-md-6 box">Content</div>

        <div class="col-md-6 box">Content</div>

    </div>


</div>

<!-- jQuery (necessary for Bootstrap's javascript plugins) -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/
jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js" integrity="sha512-K1qjQ+NcF2TYO/eI3M6v8EiNYZfA95pQumfvcVrTHtwQVDG+aHRqLi/ETn2uB+1JqwYqVG3LIvdm9lj6imS/pQ==" crossorigin="anonymous"></script>
</body>
</html>

【问题讨论】：

我不认为你想要@RestController，因为那是为了返回数据（例如，JSON）而不是 HTML。也许试试普通的@Controller？ @kuporific 不，没有用 @kuporific 是对的，只需将@RestController 更改为@Controller。 @RestController = @Controller + @ResponseBody。使用带有原始数据的 @ResponseBody 方法进行注释，即 JSon/XML/Text。 @kuporific 将您的 RequestMapping 从 @RequestMapping(value="person") 更改为 @RequestMapping(value="/person")。所以，改成@Controller，把requestmapping改成@RequestMapping(value="/person")。 @RodrigoGarcia 我都做了。两者都无济于事。它甚至无法打印出“HH” 【参考方案1】：

有几点需要注意：

@Controller

@RestController

src/main/java/webapp/WEB-INF/

/src/main/resources

intro()

index

templates/index

@Configuration

.html

ViewResolver

【讨论】：