java - 我找不到 Could not resolve view with name 'index' in servlet with name 'DispatcherServlet' 的答案

Question

刚刚开始学习Spring MVC和tomcat。

我想通过 Spring 和 ThymeLeaf VewTemplate 引擎显示 html 页面。

但它不起作用。

在我的配置文件和 Controller 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 Controller

@Controller
public class PostItemController {

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

我在浏览器中输入 localhost:9000/hello，然后浏览器显示此错误消息。 HTTP 状态 500 - 无法在名称为“DispatcherServlet”的 servlet 中解析名称为“index”的 View

类型异常报告

message Could not resolve view with name 'index' in servlet with name 'DispatcherServlet'

说明服务器遇到内部错误，无法完成此请求。

异常

javax.servlet.ServletException: Could not resolve view with name 'index' in servlet with name 'DispatcherServlet' 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(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) note The full stack trace of the root cause is available in the Apache Tomcat/7.0.50 logs.

index.html 位于/webapp/WEB-INF/view/

我要做什么 Configure 了吗？

Answer 1

看看 ThymeleafViewResolver#setViewNames(String[]) 的 javadoc .它指出

Specify a set of name patterns that will applied to determine whether a view name returned by a controller will be resolved by this resolver or not.

View 名称为您的 @Controller处理程序方法返回的是

return "index";

那个 View 名绝对不符合模式

*.html

你必须使用

return "index.html";

让 Spring 使用您的 ThymeleafViewResolver ，尽管在后面的步骤中会失败，因为不存在此类已解析的 JSP。

相反，只需去掉 viewNames <property>或修复它和你的 @Controller相应的方法。