Question

我一直试图想出一个使用Spring 3（.1.1）MVC的小测试应用程序，它支持多个servlet来处理不同的URL模式。

我创建了另一个要自动装入第一个servlet的bean，所以我最初将DAO放入app-servlet.xml文件，因为我希望它仅限于那个servlet。不，当我这样做时，我得到一个关于无法自动装配bean的错误。如果我将dhe语句移动到root-context.xml文件中，那么它就可以了。

由于我在web.xml中有2个DispatcherServlets，因此将url-pattern设置为＆＃39; /＆＃39;为每个人。虽然我仍然在app-servlet.xml文件中有语句，但我将第二个servlet的url-pattern更改为＆＃39; / add＆＃39; （也试过＆＃39; / fred＆＃39;）突然一切都按预期工作（第二个servlet名为using / addperson - 在servlet的RequestMapping中指定）。

当我将DAO放入root-context.xml时，我能够将url-pattern放回＆＃39; /＆＃39;。

因此，在测试这个设置时，我有以下web.xml：

    <!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>

<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<!-- Processes application requests -->

<servlet>
    <servlet-name>app</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/app-servlet.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet>
    <servlet-name>person</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/person-servlet.xml</param-value>
    </init-param>
</servlet>

<servlet-mapping>
    <servlet-name>app</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

<servlet-mapping>
    <servlet-name>person</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

app-servlet.xml：

<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />

<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />

<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <beans:property name="prefix" value="/WEB-INF/views/" />
    <beans:property name="suffix" value=".jsp" />
</beans:bean>

<context:annotation-config />
<context:component-scan base-package="com.hh.builditup.controller" />

person-servlet.xml：

<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />

<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />

<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <beans:property name="prefix" value="/WEB-INF/views/" />
    <beans:property name="suffix" value=".jsp" />
</beans:bean>

<context:component-scan base-package="com.hh.builditup.controller" />

根context.xml中：

<!-- Root Context: defines shared resources visible to all other web components -->
<context:annotation-config />
<context:component-scan base-package="com.hh.builditup.dao" />

＆＃39;应用程序＆＃39; servlet看起来像： @Controller 公共课HomeController {

private static final Logger logger = LoggerFactory.getLogger(HomeController.class);

@Autowired
private MyDAO myDAO;
/**
 * Simply selects the home view to render by returning its name.
 */
@RequestMapping(value = "/", method = RequestMethod.GET)
public String home(Locale locale, Model model) {

最后这个人＆＃39;小服务程序：

@Controller
public class PersonController {

private static final Logger logger = LoggerFactory.getLogger(PersonController.class);

/**
 * Simply selects the home view to render by returning its name.
 */
@RequestMapping(value = "/addperson", method = RequestMethod.GET)

DAO bean看起来像：

@Component("myDAO")
public class MyDAO {

public MyDAO()
{
    System.out.println("created MyDAO object");
}

}

有人可以解释会产生这些结果的url-pattern和RequestMapping的交互吗？当bean被限制为一个servlet而不是常见时，为什么必须修改url-pattern？另外为什么更改为url-pattern对用于测试servlet的URL没有影响？

提前感谢任何指导。

混淆应用程序上下文，url-pattern和RequestMapping - 所有这些都在一个项目中

0 个答案: