我正在阅读 Spring MVC 教程,并试图让 @PathVariable 注释工作。
当我明确命名路径变量时,我的代码运行良好:
@RequestMapping(value = "/{first}/{last}", method = RequestMethod.GET)
public ModelAndView doSomething(@PathVariable("first") String first, @PathVariable("last") String last) {
ModelAndView model = new ModelAndView("home");
model.addObject("message","HI " + first + " " + last);
return model;
}
但是,当我尝试为 PathVariable 使用地图时,我收到错误 400:客户端发送的请求在语法上不正确。
@RequestMapping(value = "/{first}/{last}", method = RequestMethod.GET)
public ModelAndView doSomething(@PathVariable Map<String,String> pathVars) {
ModelAndView model = new ModelAndView("home");
String first = pathVars.get("first");
String last = pathVars.get("last");
model.addObject("message","HI " + first + " " + last);
return model;
}
两次我都访问了完全相同的 URL,并且我希望他们两个都有相同的行为。
我知道为了让它工作,我必须添加<mvc:annotation-driven/>
到我的上下文 xml 中。但这似乎并没有什么不同。
这就是我的 servlet-context.xml 的样子:
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<context:component-scan base-package="net.mydomain.springmvctest" />
<mvc:annotation-driven/>
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
</beans:beans>