java DispatcherServlet 似乎没有处理 ModelAndView 响应
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时间：2020-10-30 14:45:38 来源:igfitidea点击:
DispatcherServlet doesn't appear to be processing the ModelAndView response
提问by P Hemans
web.xml:
网页.xml：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID"
version="3.0">
<display-name>audiClave</display-name>
<context-param>
<param-name>webAppRootKey</param-name>
<param-value>rest.root</param-value>
</context-param>
<!-- Processes application requests -->
<servlet>
<servlet-name>rest</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet</servlet- class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>rest</servlet-name>
<url-pattern>/REST/</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>base</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>base</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
base-servlet.xml:
基础servlet.xml：
<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<!-- Scans within the base package of the application for @Components to configure as beans -->
<!-- @Controller, @Service, @Configuration, etc. -->
<context:component-scan base-package="com.audiClave.controllers" />
<!-- Enables the Spring MVC @Controller programming model -->
<mvc:annotation-driven />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
Here is the BaseController:
这是基本控制器：
package com.audiClave.controllers;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class BaseController {
@RequestMapping(value = "/index.html")
public ModelAndView home() {
System.out.println("BaseController: Passing through...");
return new ModelAndView("home");
// return "WEB-INF/views/home.jsp";
}
}
I call the tomcat service with:
我使用以下命令调用 tomcat 服务：
http://localhost:8080/audiClave/index.html
and this is from the console:
这是来自控制台：
BaseController: Passing through...
appears in the console window but nothing else. Content returned states:
出现在控制台窗口中，但没有其他内容。内容返回状态：
description The requested resource () is not available.
Contents of /WEB-INF/views/home.jsp
/WEB-INF/views/home.jsp 的内容
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Audiclave</title>
</head>
<body>
<h1>Hello world from audiClave!</h1>
</body>
</html>
The problem isn't in the file though because if I return
问题不在文件中，因为如果我返回
return new ModelAndView("xxxx");
It is the same result.
这是同样的结果。
It does seem to be library related as it was working before I started changing the libraries (relating to JSTL and JSP) in my project. I don't know the sequence of the libraries I have changed. I must have ended up with something incompatible with tomcat 7.
它似乎与库相关，因为在我开始更改项目中的库（与 JSTL 和 JSP 相关）之前它正在工作。我不知道我更改的库的顺序。我一定是得到了一些与 tomcat 7 不兼容的东西。
There is nothing in the tomcat log that indicates a problem. This is the startup log:
tomcat 日志中没有任何内容表明存在问题。这是启动日志：
01/06/2011 9:25:20 AM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre6\bin;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\Python26\Scripts;C:\Python26\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Microsoft SQL Server\Tools\binn\;C:\Program Files\Microsoft SQL Server\Tools\Binn\;C:\Program Files\Microsoft SQL Server\DTS\Binn\;C:\Program Files\Microsoft SQL Server\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files\Microsoft Visual Studio 8\Common7\IDE\PrivateAssemblies\;C:\Program Files\Java\jdk1.6.0_21\bin;%APPDATA%\Python\Scripts;C:\Program Files\Translate Toolkit;C:\Program Files\Gallio\bin
01/06/2011 9:25:20 AM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:audiClave' did not find a matching property.
01/06/2011 9:25:20 AM org.apache.coyote.AbstractProtocolHandler init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
01/06/2011 9:25:20 AM org.apache.coyote.AbstractProtocolHandler init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
01/06/2011 9:25:20 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 336 ms
01/06/2011 9:25:20 AM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
01/06/2011 9:25:20 AM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.12
01/06/2011 9:25:22 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'rest'
01/06/2011 9:25:22 AM org.springframework.web.servlet.FrameworkServlet initServletBean
INFO: FrameworkServlet 'rest': initialization started
01/06/2011 9:25:22 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing WebApplicationContext for namespace 'rest-servlet': startup date [Wed Jun 01 09:25:22 EST 2011]; root of context hierarchy
01/06/2011 9:25:22 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/rest-servlet.xml]
01/06/2011 9:25:22 AM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@62610b: defining beans [baseController,restController,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,beanNameResolver,RemedyXml]; root of factory hierarchy
01/06/2011 9:25:22 AM org.springframework.web.servlet.handler.AbstractUrlHandlerMapping registerHandler
INFO: Mapped URL path [/index.html] onto handler 'baseController'
01/06/2011 9:25:22 AM org.springframework.web.servlet.handler.AbstractUrlHandlerMapping registerHandler
INFO: Mapped URL path [/REST/remedies/{language}] onto handler 'restController'
01/06/2011 9:25:22 AM org.springframework.web.servlet.handler.AbstractUrlHandlerMapping registerHandler
INFO: Mapped URL path [/REST/remedies/{language}.*] onto handler 'restController'
01/06/2011 9:25:22 AM org.springframework.web.servlet.handler.AbstractUrlHandlerMapping registerHandler
INFO: Mapped URL path [/REST/remedies/{language}/] onto handler 'restController'
01/06/2011 9:25:22 AM org.springframework.web.servlet.FrameworkServlet initServletBean
INFO: FrameworkServlet 'rest': initialization completed in 359 ms
01/06/2011 9:25:22 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'base'
01/06/2011 9:25:22 AM org.springframework.web.servlet.FrameworkServlet initServletBean
INFO: FrameworkServlet 'base': initialization started
01/06/2011 9:25:22 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing WebApplicationContext for namespace 'base-servlet': startup date [Wed Jun 01 09:25:22 EST 2011]; root of context hierarchy
01/06/2011 9:25:22 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/base-servlet.xml]
01/06/2011 9:25:22 AM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@848ecc: defining beans [baseController,restController,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping#0,org.springframework.format.support.FormattingConversionServiceFactoryBean#0,org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter#0,org.springframework.web.servlet.handler.MappedInterceptor#0,org.springframework.web.servlet.view.InternalResourceViewResolver#0]; root of factory hierarchy
01/06/2011 9:25:23 AM org.springframework.web.servlet.handler.AbstractUrlHandlerMapping registerHandler
INFO: Mapped URL path [/index.html] onto handler 'baseController'
01/06/2011 9:25:23 AM org.springframework.web.servlet.handler.AbstractUrlHandlerMapping registerHandler
INFO: Mapped URL path [/REST/remedies/{language}] onto handler 'restController'
01/06/2011 9:25:23 AM org.springframework.web.servlet.handler.AbstractUrlHandlerMapping registerHandler
INFO: Mapped URL path [/REST/remedies/{language}.*] onto handler 'restController'
01/06/2011 9:25:23 AM org.springframework.web.servlet.handler.AbstractUrlHandlerMapping registerHandler
INFO: Mapped URL path [/REST/remedies/{language}/] onto handler 'restController'
01/06/2011 9:25:23 AM org.springframework.web.servlet.FrameworkServlet initServletBean
INFO: FrameworkServlet 'base': initialization completed in 297 ms
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
01/06/2011 9:25:23 AM org.apache.coyote.AbstractProtocolHandler start
INFO: Starting ProtocolHandler ["http-bio-8080"]
01/06/2011 9:25:23 AM org.apache.coyote.AbstractProtocolHandler start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
01/06/2011 9:25:23 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 2490 ms
As per Biju's recommendation here is the log from after baseController returns the modelAndView:
根据 Biju 的建议，这里是 baseController 返回 modelAndView 后的日志：
2011-06-01 11:32:59,218 ["http-bio-8080"-exec-11] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Invoking afterPropertiesSet() on bean with name 'home'
2011-06-01 11:32:59,218 ["http-bio-8080"-exec-11] DEBUG org.springframework.web.servlet.DispatcherServlet - Rendering view [org.springframework.web.servlet.view.JstlView: name 'home'; URL [/WEB-INF/views/home.jsp]] in DispatcherServlet with name 'base'
2011-06-01 11:32:59,218 ["http-bio-8080"-exec-11] DEBUG org.springframework.web.servlet.view.JstlView - Forwarding to resource [/WEB-INF/views/home.jsp] in InternalResourceView 'home'
2011-06-01 11:32:59,218 ["http-bio-8080"-exec-11] DEBUG org.springframework.web.servlet.DispatcherServlet - Successfully completed request
采纳答案by P Hemans
The problem is that home.jsp does not exist in the
问题是 home.jsp 中不存在
.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\audiClave\WEB-INF\views
directory even though in eclipse it is showing. Wasn't able to see that until I got the logging working properly. Stopping the server, cleaning, and then republishing seems to have fixed it.
目录，即使在 eclipse 中它显示。在我让日志正常工作之前无法看到。停止服务器，清理，然后重新发布似乎已修复它。
回答by Biju Kunjummen
Register a ViewResolverin the Spring configuration along these lines:
沿着这些行在 Spring 配置中注册一个ViewResolver：
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
Now you should be able to return "home" from your controller's requestmapped method and it should correctly get resolved to "/WEB-INF/views/home.jsp" page.
现在您应该能够从控制器的 requestmapped 方法返回“home”，并且它应该正确解析到“/WEB-INF/views/home.jsp”页面。
回答by Femi
You're probably missing a dependent library (which is why it fails regardless of what JSP file you specify) and your Spring context is erroring out when it tries to create something. Look carefully in catalina.outfor a java.lang.NoClassDefFoundErrorand see if you can figure out which class it is missing.
您可能缺少一个依赖库（这就是为什么无论您指定什么 JSP 文件它都会失败）并且您的 Spring 上下文在尝试创建某些内容时出错。仔细查看catalina.out中的 a java.lang.NoClassDefFoundError，看看您是否能找出它缺少的类。
