java - Spring-MVC 中的 REST 调用

Question

我想在我的 web 应用程序上的 Spring MVC 中使用 REST 调用并返回 JSON，我已经尝试按照 mkyong 的教程进行操作。 http://www.mkyong.com/spring-mvc/spring-3-mvc-and-json-example/

但是当我打电话时它不起作用

http://localhost:8080/openRepairsClient/jan.peeters@student.kdg.be

我收到 404 错误。

这是我的代码:

@Controller
public class OpenRepairsRest {

    @Autowired
    private RepairService repairService;

    @Autowired
    private UserService userService;

    @RequestMapping(value = "/openRepairsClient/{username}")
    public @ResponseBody
    List<Repair> openRepairsInJson(@PathVariable("username") String username) {
        List<Repair> openRepairs = null;
        try {
            openRepairs = repairService.findOpenRepairsByClient((Client) userService.getUser(username));
        } catch (UserServiceException ex) {
            Logger.getLogger(OpenRepairsRest.class.getName()).log(Level.SEVERE, null, ex);
        }
        return openRepairs;
    }
}

是的，我确定用户名存在，否则我会收到用户服务异常。

我的 web.xml 文件:

<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee                               http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
    <!-- welcome files -->
    <welcome-file-list>
        <welcome-file>index.xhtml</welcome-file>
    </welcome-file-list>
    <!-- context parameters -->
    <context-param>
        <param-name>javax.faces.CONFIG_FILES</param-name>
        <param-value>/WEB-INF/jsf/faces-config.xml</param-value>
    </context-param>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring/applicationContext.xml</param-value>
    </context-param>
    <context-param>
        <param-name>javax.faces.PROJECT_STAGE</param-name>
        <param-value>Development</param-value>
    </context-param>
    <context-param>
        <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
        <param-value>.xhtml</param-value>
    </context-param>
    <context-param>
        <param-name>facelets.LIBRARIES</param-name>
        <param-value>/WEB-INF/mytags.taglib.xml</param-value>
    </context-param>
    <!-- listeners -->
    <listener>
        <!-- Required for Faces to kick in -->
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
    </listener>
    <!-- Load applicationContext in ServletContextListener -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- Frontcontrollers -->
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>
                /WEB-INF/spring/dispatcher-servlet.xml
            </param-value>
        </init-param>
        <load-on-startup>2</load-on-startup>
    </servlet>
    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <filter>
        <filter-name>Authentication Filter</filter-name>
        <filter-class>be.kdg.repaircafe.filters.AuthenticationFilter</filter-class>
    </filter>
    <!--  Mappings -->
    <servlet>
        <servlet-name>LogoutServlet</servlet-name>
        <servlet-class>be.kdg.repaircafe.servlets.LogoutServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/rest/*</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.xhtml</url-pattern>
    </servlet-mapping>
    <filter-mapping>
        <filter-name>Authentication Filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <servlet-mapping>
        <servlet-name>LogoutServlet</servlet-name>
        <url-pattern>/LogoutServlet</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
    <error-page>
        <error-code>404</error-code>
        <location>/WEB-INF/errorpages/error.jsp</location>
    </error-pag

e>

Answer 1

您的错误出现在网址中，看来您忘记了项目名称和单词rest。尝试使用此网址:

http://localhost:8080/SpringMVC/rest/openRepairsClient/jan.peeters@student.kdg.be

您可以使用此简化版本的代码进行尝试:

@Controller
public class OpenRepairsRest {

    @RequestMapping(value = "/openRepairsClient/{username}")
    public @ResponseBody
    List<Shop> openRepairsInJson(@PathVariable("username") String username) {

        Shop exampleShop = new Shop();
        exampleShop.setName("exampleName");
        exampleShop.setStaffName(new String[] { username });

        List<Shop> openShops = new ArrayList<Shop>();
        openShops.add(exampleShop);

        return openShops;
    }
}