Spring MVC多个url映射到相同的控制器方法

Question

假设我们在web.xml中有一个名为dispatcher的servlet的3个url模式:

<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/aaa/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/bbb/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/ccc/*</url-pattern>
</servlet-mapping>

和控制器方法:

@RequestMapping(value = "/xxx", method = RequestMethod.POST)
public String foo() {}

由于@RequestMapping中的路径值不包含servlet路径,因此用户请求时

/aaa/xxx
/bbb/xxx
/ccc/xxx

请求将全部映射到方法foo.

我认为如果网站非常复杂,这可能会导致潜在的问题.这是Spring Web MVC的一个缺陷还是我误解了什么？

Answer 1

您可以通过传递多个值将所有请求映射到一个请求映射.

@RequestMapping(value = {"/aaa/xxx", "/bbb/xxx", "/ccc/xxx"}, method = RequestMethod.POST)
public String foo() {}

并且只是在web.xml中更改映射以处理对dispatcherservlet的所有类型的请求.

<servlet-mapping>
   <servlet-name>dispatcher</servlet-name>
   <url-pattern>/*</url-pattern>
</servlet-mapping>

您可以根据应用程序要求或Web流定义不同的控制器.如果需要,您可以在实用程序类中移动常用代码段.

@RequestMapping("/aaa")
public class AAAController {
    @RequestMapping(value = "/xxx", method = RequestMethod.POST)
    public String foo() {
        // call to common utility function
    }
    // other methods
}

@RequestMapping("/bbb")
public class BBBController {
    @RequestMapping(value = "/xxx", method = RequestMethod.POST)
    public String foo() {
        // call to common utility function
    }
    // other methods
}

@RequestMapping("/ccc")
public class CCCController {
    @RequestMapping(value = "/xxx", method = RequestMethod.POST)
    public String foo() {
        // call to common utility function
    }
    // other methods
}

阅读Spring Web MVC框架文档中的更多内容

您也可以以编程方式配置它

public class MyWebApplicationInitializer implements WebApplicationInitializer {

    @Override
    public void onStartup(ServletContext container) {
        ServletRegistration.Dynamic registration = container.addServlet("dispatcher", new DispatcherServlet());
        registration.setLoadOnStartup(1);
        registration.addMapping("/*");
    }
}