使用注解的基本 Spring Web MVC 应用程序

【问题标题】：Basic Spring Web MVC Application using annotation使用注解的基本 Spring Web MVC 应用程序
【发布时间】：2015-09-16 04:45:28
【问题描述】：

我的基本 Spring MVC Web 应用程序不起作用。我创建了 Simple Spring Web Maven Project 并删除了不必要的代码以简化它。然后，我添加了控制器实现并像我最近读过的书中一样对其进行了注释。我从书中部署了一个示例应用程序和一个我刚刚创建的应用程序。示例应用程序正常工作 - 我的不是。当我尝试访问 URL ...localhost.../app-name/start/basic/show Tomcat 服务器显示 404 错误。这是我的代码：

spring.app 包中的BasicController

@Controller
@RequestMapping("/basic")
public class BasicController{

    @RequestMapping("/show")
    public ModelAndView handleRequest(HttpServletRequest arg0,
            HttpServletResponse arg1) throws Exception {

        Map < String, String > modelData = new HashMap < String, String >();
        modelData.put("message", "Hello World!");

        return new ModelAndView("showMessage", modelData);
    }

}

App/src/main/webapp/WEB-INF/mvc-config.xml 文件：

<?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.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">

    <mvc:annotation-driven />
    <context:component-scan base-package="spring.app"/>

    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/view/"/>
            <property name="suffix" value=".jsp"/>
    </bean>

</beans>

App/src/main/webapp/WEB-INF/web.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         id="WebApp_ID" version="2.5">


    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/mvc-config.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/start/*</url-pattern>
    </servlet-mapping>

</web-app>

WEB-INF/view 目录下的showMessage.jsp：

<!DOCTYPE html>

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<html>
    <head>
        <meta charset="utf-8">
        <title>Welcome</title>
    </head> 
    <body>
        <h2>${message}</h2>
    </body>
</html>

我试图解决这个问题，但一切都像示例应用程序一样实现，所以我不知道它为什么会失败。

我的痕迹，当我选择“在服务器上运行”并且我只部署了这个应用程序时：

cze 29, 2015 6:44:27 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:App' did not find a matching property.
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server version:        Apache Tomcat/8.0.23
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server built:          May 19 2015 14:58:38 UTC
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server number:         8.0.23.0
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: OS Name:               Windows 8.1
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: OS Version:            6.3
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Architecture:          amd64
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Java Home:             C:\Program Files\Java\jre1.8.0_45
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: JVM Version:           1.8.0_45-b15
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: JVM Vendor:            Oracle Corporation
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: CATALINA_BASE:         C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: CATALINA_HOME:         C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -agentlib:jdwp=transport=dt_socket,suspend=y,address=localhost:60768
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dcatalina.base=C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dcatalina.home=C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dwtp.deploy=C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23\wtpwebapps
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Djava.endorsed.dirs=C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23\endorsed
cze 29, 2015 6:44:27 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dfile.encoding=Cp1250
cze 29, 2015 6:44:27 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent
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\jre1.8.0_45\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre1.8.0_45/bin/server;C:/Program Files/Java/jre1.8.0_45/bin;C:/Program Files/Java/jre1.8.0_45/lib/amd64;C:\ProgramData\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\xampp\php;C:\Program Files\MySQL\MySQL Server 5.1\bin;C:\Program Files (x86)\MySQL\MySQL Server 5.1\bin;C:\Users\Adrian\Desktop\eclipse;;.
cze 29, 2015 6:44:27 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-nio-8081"]
cze 29, 2015 6:44:28 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFO: Using a shared selector for servlet write/read
cze 29, 2015 6:44:28 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-nio-8010"]
cze 29, 2015 6:44:28 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFO: Using a shared selector for servlet write/read
cze 29, 2015 6:44:28 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1648 ms
cze 29, 2015 6:44:28 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
cze 29, 2015 6:44:28 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/8.0.23
cze 29, 2015 6:44:28 PM org.apache.catalina.util.SessionIdGeneratorBase createSecureRandom
INFO: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [125] milliseconds.
cze 29, 2015 6:44:28 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23\webapps\docs
cze 29, 2015 6:44:28 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23\webapps\docs has finished in 63 ms
cze 29, 2015 6:44:28 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23\webapps\examples
cze 29, 2015 6:44:29 PM org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextInitialized()
cze 29, 2015 6:44:29 PM org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextInitialized()
cze 29, 2015 6:44:29 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23\webapps\examples has finished in 962 ms
cze 29, 2015 6:44:29 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23\webapps\host-manager
cze 29, 2015 6:44:29 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23\webapps\host-manager has finished in 78 ms
cze 29, 2015 6:44:29 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23\webapps\manager
cze 29, 2015 6:44:30 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23\webapps\manager has finished in 110 ms
cze 29, 2015 6:44:30 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23\webapps\ROOT
cze 29, 2015 6:44:30 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory C:\Users\Adrian\Desktop\apache-tomcat-8.0.23-windows-x64\apache-tomcat-8.0.23\webapps\ROOT has finished in 47 ms
cze 29, 2015 6:44:30 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-nio-8081"]
cze 29, 2015 6:44:30 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-nio-8010"]
cze 29, 2015 6:44:30 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 2149 ms

好的，假设我通过创建 Spring MVC 项目而不是 Simple Spring Web Maven 项目来解决这个问题。现在一切正常。

【问题讨论】：

  • 您的控制器是否被调用？您是否尝试过调试控制器以查看是否正在调用 handleRequestmethod？您的应用程序日志中有任何 StackTraces 吗？
  • 检查 Tomcat 上的应用上下文路径。
  • 应用上下文路径是“/App”，所以我访问的是 localhost:8081/App/start/basic/show”。查看我的第一篇 Stack Trace 帖子

标签： java xml spring maven spring-mvc


【解决方案1】：

根据你的日志

你的应用没有部署。我从你的日志中得到了线索

INFO: Deploying

当你读到INFO: Deploying

它没有说明您的应用是“/App”

【讨论】：

  • 但是当我检查我的 Tomcat 服务器的管理器应用程序时，我可以在列表应用程序中看到 /App 路径，所以应用程序的某些部分没有部署？那么您对解决方案有何建议？
  • 我会说尝试将日志放入您的方法中。你可以按照[这个简单的]mkyong.com/spring-mvc/spring-mvc-log4j-integration-example@Log4j.properties file@这一行#Root logger option log4j.rootLogger=DEBUG,stdout,file而不是“DEBUG”，我会放ALL，然后尝试读取所有日志。这个日志文件会告诉你contest你得到了什么，你得到了什么请求映射等等......希望它有帮助
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