我定义了这个RequestMapping/方法:
@RequestMapping( value={"/ViewReport/json", "/ViewReport/*/json"} , method = RequestMethod.GET)
public ModelAndView TestJson(final Model model, HttpServletRequest request){
JSONObject json = new JSONObject();
json.put("Hello", "Goodbye");
json.put("request", request.getRequestURL());
model.addAttribute("fnord", json.toJSONString());
return new ModelAndView("reportViewJson");
}
在我的 web.xml
文件中,我有以下内容:
<servlet-mapping>
<servlet-name>autoreport</servlet-name>
<url-pattern>/ViewReport/*/json</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>autoreport</servlet-name>
<url-pattern>/ViewReport/json</url-pattern>
</servlet-mapping>
现在,当我导航到 /ViewReport/json
时,我得到了预期的 JSON。但是,当我导航到 /ViewReport/42/json
时,我得到了 404。
当我的服务器启动时,我收到以下日志:
[ INFO] 23:51(AbstractUrlHandlerMapping.java:registerHandler:315)
Mapped URL path [/ViewReport/] onto handler 'reportViewController'
[DEBUG] 23:51(AbstractBeanFactory.java:doGetBean:246)
Returning cached instance of singleton bean 'reportViewController'
[ INFO] 23:51(AbstractUrlHandlerMapping.java:registerHandler:315)
Mapped URL path [/ViewReport/json] onto handler 'reportViewController'
[DEBUG] 23:51(AbstractBeanFactory.java:doGetBean:246)
Returning cached instance of singleton bean 'reportViewController'
[ INFO] 23:51(AbstractUrlHandlerMapping.java:registerHandler:315)
Mapped URL path [/ViewReport/json.*] onto handler 'reportViewController'
[DEBUG] 23:51(AbstractBeanFactory.java:doGetBean:246)
Returning cached instance of singleton bean 'reportViewController'
[ INFO] 23:51(AbstractUrlHandlerMapping.java:registerHandler:315)
Mapped URL path [/ViewReport/json/] onto handler 'reportViewController'
[DEBUG] 23:51(AbstractBeanFactory.java:doGetBean:246)
Returning cached instance of singleton bean 'reportViewController'
[ INFO] 23:51(AbstractUrlHandlerMapping.java:registerHandler:315)
Mapped URL path [/ViewReport/*/json] onto handler 'reportViewController'
[DEBUG] 23:51(AbstractBeanFactory.java:doGetBean:246)
Returning cached instance of singleton bean 'reportViewController'
[ INFO] 23:51(AbstractUrlHandlerMapping.java:registerHandler:315)
Mapped URL path [/ViewReport/*/json.*] onto handler 'reportViewController'
[DEBUG] 23:51(AbstractBeanFactory.java:doGetBean:246)
Returning cached instance of singleton bean 'reportViewController'
[ INFO] 23:51(AbstractUrlHandlerMapping.java:registerHandler:315)
Mapped URL path [/ViewReport/*/json/] onto handler 'reportViewController'
更新2
在我的 autoreport-servlet.xml
中,我得到了这个:
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property
name="webBindingInitializer">
<!-- Configures Spring MVC DataBinder instances -->
<bean
class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">
<property name="validator" ref="validator" />
</bean>
</property>
</bean>
最佳答案
由于 Servlet Specification (Section 11),以下映射无效:
<servlet-mapping>
<servlet-name>autoreport</servlet-name>
<url-pattern>/ViewReport/*/json</url-pattern>
</servlet-mapping>
路径映射之间不允许有*
。对于路径映射,仅允许在末尾带有 /*
。 (好吧,当挑剔时,它实际上是有效且允许的,但它没有按预期被视为通配符。)
引用自 Servlet 规范:
In theWeb application deployment descriptor, the following syntax is used to define mappings:
- A string beginning with a ‘/’ character and ending with a ‘/*’ suffix is used for path mapping.
- A string beginning with a ‘*.’ prefix is used as an extension mapping.
- A string containing only the ’/’ character indicates the "default" servlet of the application. In this case the servlet path is the request URI minus the context path and the path info is null.
- All other strings are used for exact matches only.
所以你的模式 /ViewReport/*/json
是一个没有通配符的精确匹配模式。
这就是 /ViewReport/42/json
给出 HTTP 404
的原因,因为它不匹配任何模式。
关于java - 为什么这个 Java servlet url-pattern/RequestMapping 不起作用?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/20577261/