Java Spring mvc autowire RequestMappingHandlerMapping
我试图在我的SpringMVC控制器中自动连接Java Spring mvc autowire RequestMappingHandlerMapping,java,spring-mvc,Java,Spring Mvc,我试图在我的SpringMVC控制器中自动连接org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping,以获取所有url映射并在UI上显示它们,但没有成功。缺少bean时出错: org.springframework.beans.factory.BeanCreationException: Could not autowire field: org.springframework.
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping
,以获取所有url映射并在UI上显示它们,但没有成功。缺少bean时出错:
org.springframework.beans.factory.BeanCreationException: Could not autowire field: org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping web.controller.WorkController.handlerMapping; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
My web.xml:
<display-name>Spring MVC Application</display-name>
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>WEB-INF/mvc-dispatcher-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/root-context.xml</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
尝试获取所有请求
URL
,下面的代码可能对您有用
ServletContext servletContext = request.getSession().getServletContext();
WebApplicationContext appContext = WebApplicationContextUtils.getWebApplicationContext(servletContext);
Map<String, HandlerMapping> allRequestMappings = BeanFactoryUtils.beansOfTypeIncludingAncestors(appContext, HandlerMapping.class, true, false);
for (HandlerMapping handlerMapping : allRequestMappings.values()) {
if (handlerMapping instanceof RequestMappingHandlerMapping) {
RequestMappingHandlerMapping requestMappingHandlerMapping = (RequestMappingHandlerMapping) handlerMapping;
Map<RequestMappingInfo, HandlerMethod> handlerMethods = requestMappingHandlerMapping.getHandlerMethods();
for (Map.Entry<RequestMappingInfo, HandlerMethod> requestMappingInfoHandlerMethodEntry : handlerMethods.entrySet()) {
RequestMappingInfo requestMappingInfo = requestMappingInfoHandlerMethodEntry.getKey();
PatternsRequestCondition patternsCondition = requestMappingInfo.getPatternsCondition();
String requestUrl = SetUtils.first(patternsCondition.getPatterns());
System.out.println(requestUrl);
}
}
}
您应该在自动连接RequestMappingHandlerMappingbean之前启动它。 它有两种方式:
- 我尝试在我的主类中添加“@EnableWebFlux”,它在我的 情况)
- 所以我认为也许“使能WebMVC”是这样的
- 这对我来说很好,不是吗↓ 请告诉我:)
@EnableWebFlux(适用于webflux)
@启用WebMVC(用于commvc)
@SpringBoot应用程序
公共类仪器应用{
公共静态void main(字符串[]args){
ConfigurableApplicationContext applicationContext=新的SpringApplicationBuilder(InstoreApplication.class)。。。。。。
}
}
您可以在*.properties文件中添加这些属性:
# Log restful end points
logging.level.web=TRACE
logging.level.org.springframework.web=TRACE
什么是SetUtils.first()?@NickJ将其视为
final Set patterns=patternsCondition.getPatterns();String requestUrl=patterns.stream().findFirst().orElse(StringUtils.EMPTY)代码>参考:
package web.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
import web.beans.HelloBean;
import java.util.List;
@Controller
public class WorkController {
@Autowired RequestMappingHandlerMapping handlerMapping;
@Autowired private HelloBean helloBean;
@Autowired private ApplicationContext applicationContext;
@RequestMapping(value = "/index")
public String index() {
return "index";
}
}
ServletContext servletContext = request.getSession().getServletContext();
WebApplicationContext appContext = WebApplicationContextUtils.getWebApplicationContext(servletContext);
Map<String, HandlerMapping> allRequestMappings = BeanFactoryUtils.beansOfTypeIncludingAncestors(appContext, HandlerMapping.class, true, false);
for (HandlerMapping handlerMapping : allRequestMappings.values()) {
if (handlerMapping instanceof RequestMappingHandlerMapping) {
RequestMappingHandlerMapping requestMappingHandlerMapping = (RequestMappingHandlerMapping) handlerMapping;
Map<RequestMappingInfo, HandlerMethod> handlerMethods = requestMappingHandlerMapping.getHandlerMethods();
for (Map.Entry<RequestMappingInfo, HandlerMethod> requestMappingInfoHandlerMethodEntry : handlerMethods.entrySet()) {
RequestMappingInfo requestMappingInfo = requestMappingInfoHandlerMethodEntry.getKey();
PatternsRequestCondition patternsCondition = requestMappingInfo.getPatternsCondition();
String requestUrl = SetUtils.first(patternsCondition.getPatterns());
System.out.println(requestUrl);
}
}
}
AbstractControllerUrlHandlerMapping, AbstractDetectingUrlHandlerMapping,
AbstractHandlerMapping, AbstractHandlerMethodMapping,
AbstractUrlHandlerMapping, BeanNameUrlHandlerMapping,
ControllerBeanNameHandlerMapping, ControllerClassNameHandlerMapping,
DefaultAnnotationHandlerMapping, RequestMappingHandlerMapping,
RequestMappingInfoHandlerMapping, SimpleUrlHandlerMapping
<bean name="handlerMapping" class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping">
<!-- add your properties here property name="..." value="..."></property-->
</bean>
@Configuration
@ComponentScan("your.package")
@EnableWebMvc
public class AppConfig {
...
@Bean
public RequestMappingHandlerMapping requestMappingHandlerMapping() {
RequestMappingHandlerMapping mapping = new RequestMappingHandlerMapping();
// add properties here
return mapping;
}
...
}
# Log restful end points
logging.level.web=TRACE
logging.level.org.springframework.web=TRACE