我无法找到无法解析名称为'DispatcherServlet'的servlet中名为'index'的视图的答案

Question

我开始研究Spring MVC和tomcat.

我想通过Spring和ThymeLeaf VewTemplate Engine显示html页面.

但它不起作用.

在我的配置文件和控制器下面.

web.xml文件

<servlet>
    <servlet-name>DispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>DispatcherServlet</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>

<filter>
    <filter-name>EncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>EncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

/webapp/WEB-INF/DispatcherServlet-serlvet.xml

 <context:component-scan base-package="com.everblog.controller" />

<!-- ViewResolver be configured by thymeleaf -->
<bean id="templateResolver" class="org.thymeleaf.templateresolver.ServletContextTemplateResolver">
    <property name="prefix" value="/WEB-INF/view/" />
    <property name="suffix" value=".html" />
    <property name="templateMode" value="HTML5" />
    <property name="characterEncoding" value="UTF-8" />
</bean>

<bean id="templateEngine" class="org.thymeleaf.spring3.SpringTemplateEngine">
    <property name="templateResolver" ref="templateResolver" />
</bean>

<bean class="org.thymeleaf.spring3.view.ThymeleafViewResolver">
    <property name="templateEngine" ref="templateEngine" />
    <property name="order" value="1" />
    <property name="viewNames" value="*.html" />
</bean>

和控制器

@Controller
public class PostItemController {

   @RequestMapping(value="/hello", method = RequestMethod.GET)
   public String helloWorld() {
      System.out.println("IS IN");
      return "index";
   }
}

我在浏览器上键入localhost:9000/hello,然后浏览器显示此错误消息.HTTP状态500 - 无法解析名为"DispatcherServlet"的servlet中名为"index"的视图

类型异常报告

消息无法解析名为'DispatcherServlet'的servlet中名为'index'的视图

description服务器遇到内部错误,导致无法完成此请求.

例外

javax.servlet.ServletException:无法解析名为'DispatcherServlet'的servlet中名为'index'的视图org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1190)org.springframework.web.servlet.DispatcherServlet. processDispatchResult(DispatcherServlet.java:992)org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)org.springframework.web. servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844)javax.servlet.http.HttpServlet.service(httpServlet.java:621)org.springframework. web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)javax.servlet.http.HttpServlet.service(HttpServlet.java:728)org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(C haracterEncodingFilter.java:88)org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)注意Apache Tomcat/7.0.50日志中提供了根本原因的完整堆栈跟踪.

index.html位于/ webapp/WEB-INF/view /

我要做什么配置了？

Answer 1

看一下javadoc ThymeleafViewResolver#setViewNames(String[]).它指出

指定一组名称模式,这些名称模式将应用于确定控制器返回的视图名称是否将由此解析程序解析.

@Controller处理程序方法返回的视图名称是

return "index";

该视图名称肯定与模式不匹配

*.html

你必须使用

return "index.html";

让Spring使用你的ThymeleafViewResolver,虽然这会在以后的步骤中失败,因为没有这样的已解析的JSP存在.

相反,只需摆脱viewNames <property>或修复它和你的@Controller方法.