Java PathVariable根本不起作用
出于某种原因,我的Java PathVariable根本不起作用,java,spring-mvc,Java,Spring Mvc,出于某种原因,我的@PathVariable注释根本不起作用,在进行了一些谷歌搜索后,我一直无法找到其他有相同问题的人,以下是代码: @Controller @RequestMapping("/bot") public class BotController { @RequestMapping(value = "/test", method = RequestMethod.GET) public void test() { System.out.println("
@PathVariable
注释根本不起作用,在进行了一些谷歌搜索后,我一直无法找到其他有相同问题的人,以下是代码:
@Controller
@RequestMapping("/bot")
public class BotController {
@RequestMapping(value = "/test", method = RequestMethod.GET)
public void test() {
System.out.println("test");
Store.INSTANCE.getChatBot().postMessage("test");
}
@RequestMapping(value = "/say/{text}", method = RequestMethod.GET)
public void say(final @PathVariable("text") String text) {
System.out.println("say: " + text);
Store.INSTANCE.getChatBot().postMessage(text);
}
}
这是有效的:http://localhost:8080/GithubHookSEChatService/bot/test
这不起作用:http://localhost:8080/GithubHookSEChatService/bot/say/realtest
除了System.out.println(“say:+text)
没有发生之外,我唯一的其他线索是:
24-Aug-2014 17:25:21.611 WARNING [http-apr-8080-exec-24]
org.springframework.web.servlet.PageNotFound.noHandlerFound
No mapping found for HTTP request with URI
[/GithubHookSEChatService/bot/say/realtest] in DispatcherServlet with name 'dispatcher'
我没有线索了,有人知道发生了什么吗?为什么后者不起作用
我的相关web.xml
:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
</web-app>
<?xml version='1.0' encoding='UTF-8' ?>
<!-- was: <?xml version="1.0" encoding="UTF-8"?> -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd" xmlns:context="http://www.springframework.org/schema/context">
<!-- auto scan -->
<context:component-scan base-package="com.skiwi.githubhooksechatservice" />
<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath:githubhooksechatservice-environment.properties</value>
</property>
</bean>
<!-- properties -->
<bean id="configuration" class="com.skiwi.githubhooksechatservice.mvc.configuration.Configuration">
<property name="rootUrl" value="${env.rootUrl}"/>
<property name="chatUrl" value="${env.chatUrl}"/>
<property name="botEmail" value="${env.botEmail}"/>
<property name="botPassword" value="${env.botPassword}"/>
<property name="roomId" value="${env.roomId}"/>
</bean>
<!-- startup bean -->
<bean name="startup" init-method="start" class="com.skiwi.githubhooksechatservice.mvc.beans.StartupBean" lazy-init="false" />
</beans>
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>
此问题似乎与
@PathVariable
无关,实际上它在以下方面也会失败:
@RequestMapping(value = "/test/test", method = RequestMethod.GET)
@ResponseBody
public void test() {
System.out.println("test");
Store.INSTANCE.getChatBot().postMessage("test");
}
这是因为有多个级别的子路径,我在中找到了问题的解决方案
您只需要在dispatcherservlet.xml
中包含以下内容:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
</web-app>
<?xml version='1.0' encoding='UTF-8' ?>
<!-- was: <?xml version="1.0" encoding="UTF-8"?> -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd" xmlns:context="http://www.springframework.org/schema/context">
<!-- auto scan -->
<context:component-scan base-package="com.skiwi.githubhooksechatservice" />
<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath:githubhooksechatservice-environment.properties</value>
</property>
</bean>
<!-- properties -->
<bean id="configuration" class="com.skiwi.githubhooksechatservice.mvc.configuration.Configuration">
<property name="rootUrl" value="${env.rootUrl}"/>
<property name="chatUrl" value="${env.chatUrl}"/>
<property name="botEmail" value="${env.botEmail}"/>
<property name="botPassword" value="${env.botPassword}"/>
<property name="roomId" value="${env.roomId}"/>
</bean>
<!-- startup bean -->
<bean name="startup" init-method="start" class="com.skiwi.githubhooksechatservice.mvc.beans.StartupBean" lazy-init="false" />
</beans>
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>
然后一切都按预期进行 我知道这是个老问题。但是这个答案对其他人会有帮助 (1) 假设dispatcher是web.xml中的DispatcherServlet名称,则将下面的行添加到dispatcher-servlet.xml
您是否启用了此模块的日志记录,并研究了初始化(其中报告了每个映射)和请求处理(其中应报告未找到匹配的控制器方法)?我最近使用了此功能,没有遇到任何问题。@MarkoTopolnik它给了我以下信息:24-Aug-2014 17:25:21.611警告[http-apr-8080-exec-24]org.springframework.web.servlet.PageNotFound.nohandler未找到URI为[/GithubHookSEChatService/bot/say/realtest]的http请求的映射在名为“dispatcher”
的DispatcherServlet中,您看到一行写着“映射URL…到控制器方法…”或类似的内容?Yes@MarkoTopolnik2014年8月24日17:31:20.333信息[http-apr-8080-exec-40]org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping.registerHandler映射URL路径[/bot/*]作为http://localhost:8080/GithubHookSEChatService/bot/test
确实有效。不过,我无法在日志中看到这两个方法的精确映射。我现在有了一个有用的线索:@RequestMapping(value=“/{text}”,method=RequestMethod.GET)
可以与http://localhost:8080/GithubHookSEChatService/bot/realtest
,但@RequestMapping(value=“/say/{text}”,method=RequestMethod.GET)
仍然不能与http://localhost:8080/GithubHookSEChatService/bot/say/realtest
。您是否考虑过减少XML?能够只使用Java是一种解脱,包括类型安全和自动导入的好处。@MarkoTopolnik我已经考虑过了,但到目前为止还不能使用配置文件。你是说.properties文件吗?仍然,默认情况下使用AnnotationHandler,因此您必须在某个地方使用一些非标准配置。我的猜测是,您只是错过了上下文中的
。另一个答案是错误的,因为它不是组件扫描
将DefaultAnnotationHandlerMapping
添加到上下文中,因为它几乎忽略了mvc特定的内容。