无法使用Spring Boot自动配置访问REST控制器

Question

我试图创建一个简单的REST服务与Spring Boot遵循本教程。webapp文件夹(index.html)中的“hello world”html文件正在http://localhost:8080/my-rest-app/上打开（我创建了一个Maven-Web-App，因为我希望有一个服务的“欢迎页面”）。但是，如果我试图访问http://localhost:8080/my-rest-app/user上的REST服务，我会得到一条404消息。

<?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>service</groupId>
    <artifactId>my-rest-app</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>my-rest-app</name>

    <properties>
        <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

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

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

</project>

package service.my.rest.app;

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

@SpringBootApplication
//@ComponentScan({"service.my.rest.app", "service.my.rest.app.controller"})
//@ComponentScan(basePackageClasses = UserController.class)
public class Application {

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

}

UserController.java：

package service.my.rest.app.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/user")
public class UserController {

    @RequestMapping(method = RequestMethod.GET)
    public String getUser() {
        return "Hello";
    }

}

我错过了什么？服务的URL是否错误？我在某个地方读到Spring Boot REST服务的上下文路径总是/，这意味着我必须通过http://localhost:8080/my-rest-app/访问服务，但这不起作用（没有index.html)。用server.contextpath=/my-rest-app和server.port=8080更改application.properties中的上下文路径也无济于事。

Answer 1

问题在于构建和部署过程。谢谢你@Chrylis的暗示。

package service.my.rest.app;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
import org.springframework.context.annotation.ComponentScan;

@SpringBootApplication
@ComponentScan({"service.my.rest.app"})
public class Application extends SpringBootServletInitializer {

    private static Class<Application> application = Application.class;

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

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(application);
    }

}

我不得不扩展我的应用程序来构建和部署一个war文件，因为Spring Boot实际上是为生成一个JAR而设计的。