在没有 Spring Boot 的情况下运行 Spring Restful Web 服务的问题

Question

我正在尝试构建 Restful Web 服务。我的 Maven 项目名称是 rest，我正在关注 Spring's Building a RESTful Web Service 这样做，但我不想使用 Spring Boot，而只是创建一个战争并将其托管在 Tomcat 上在我的 ecrise/STS 中。这是我的 web.xml 和 XX-servlet.xml 文件：

web.xml

<web-app>
  <display-name>Archetype Created Web Application</display-name>

  <!-- The front controller of this Spring Web application, responsible for handling all application requests -->
    <servlet>
        <servlet-name>rest</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
         <load-on-startup>1</load-on-startup>
    </servlet>
    <!-- Map all requests to the DispatcherServlet for handling -->
    <servlet-mapping>
        <servlet-name>rest</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
</web-app>

rest-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:security="http://www.springframework.org/schema/security"
       xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.2.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

        <context:annotation-config />
        <context:component-scan base-package="com.rest" />
        <mvc:annotation-driven/>


</beans>

GreetingController.java

@RestController
public class GreetingController2 {
    private final AtomicLong counter = new AtomicLong();

    @RequestMapping("/greeting")
    public Greeting greeting(@RequestParam(value = "name", defaultValue = "World") String name) {
        return new Greeting(counter.incrementAndGet(), String.format("Hello %s", name));
    }
}

当我在 Tomcat 上运行它时，URL：http://localhost:8080/rest 给出 404，我在 Tomcat 控制台 Aug 16, 2017 3:59:28 PM org.springframework.web.servlet.PageNotFound noHandlerFound WARNING: No mapping found for HTTP request with URI [/rest/] in DispatcherServlet with name 'rest' 中看到此消息，而我确实有映射。

当我点击 http://localhost:8080/rest/greeting 时，我会收到带有消息 The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers. 的 http 406，而根据教程，它应该转换为可以在浏览器中呈现的 JSON。

我花了很多时间试图找出并查看 SO 上的各种帖子以找出问题所在，但找不到。

Answer 1

你没有像
这样的默认映射 @RequestMapping("/")
根据您上面的代码，您应该使以下网址正常工作
http://localhost:8080/rest/greeting