java 如何使用@RequestMapping 标头？
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How to use @RequestMapping headers?
提问by EdwardLau
I am studying springmvc. When I use @RequestMapping(value="/helloWorld", headers = "content-type=text/*")and connect to http://localhost:8080/SpringMVC_10100/helloWorld, the following is output in the console:
我正在学习 springmvc。当我使用@RequestMapping(value="/helloWorld", headers = "content-type=text/*")并连接到 时http://localhost:8080/SpringMVC_10100/helloWorld，控制台输出以下内容：
WARN org.springframework.web.servlet.PageNotFound - No matching handler method found for servlet request: path
'/helloWorld', method'GET', parametersmap[[empty]]
警告 org.springframework.web.servlet.PageNotFound - 找不到与 servlet 请求匹配的处理程序方法：路径
'/helloWorld'、方法'GET'、参数map[[empty]]
My code is:
我的代码是：
@Controller
public class HelloWordController {
private Logger logger = LoggerFactory.getLogger(HelloWordController.class);
@RequestMapping(value="/helloWorld", headers = "content-type=text/*")
public ModelAndView helloWorld() {
logger.debug("jin ru le");
logger.info("The helloWorld() method is use");
ModelAndView view = new ModelAndView();
view.setViewName("/helloworld");
return view;
}
}
web.xml is
web.xml 是
<servlet>
<description>This is Spring MVC DispatcherServlet</description>
<servlet-name>SpringMVC DispatchServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<description>SpringContext</description>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC DispatchServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
Why?
为什么？
采纳答案by naikus
Its most likely the case that /helloworld is not inside the path configured for your dispatcher servlet
最有可能的情况是 /helloworld 不在为您的调度程序 servlet 配置的路径内
e.g. If i have a servlet configured like so:
例如，如果我有一个像这样配置的 servlet：
<servlet>
<servlet-name>BMA</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>BMA</servlet-name>
<url-pattern>/bma/*</url-pattern>
</servlet-mapping>
And i have a controller configured like so:
我有一个这样配置的控制器：
@RequestMapping(value = "/planner/plan/{planId}/delete", method = RequestMethod.GET)
public ModelAndView deletePlanConfirm(HttpServletRequest request,
@PathVariable("planId") Long planId) {}
Then the request in browsder would be:
然后浏览器中的请求将是：
http://localhost:8080/bma/planner/plan/1223/delete
Edit: Also if you have content-type header narrowing on your handler, make sure that content-type haeder is sent in your request.
编辑： 此外，如果您的处理程序有内容类型标头缩小，请确保在您的请求中发送内容类型标题。
回答by ravi
In the below annotation remove the headers:
在下面的注释中删除标题：
@RequestMapping(value="/helloWorld", headers = "content-type=text/*")
to:
到：
@RequestMapping(value="/helloWorld", method = RequestMethod.GET)
or to:
或者：
@RequestMapping(value="/helloWorld")
should make it work.
应该让它工作。
