为什么我的 Spring web app 项目不进入主页? [英] Why don't my Spring web app project doesn't go to home page?

问题描述

这是我使用的控制器

@Controller公共类项目控制器{@自动连线私人项目服务项目服务；@自动连线公共项目控制器(项目服务项目服务){this.ProjectService = 项目服务；}@RequestMapping({"/","/find"})public String getPersonList(@RequestParam("regNo") String regNo, ModelMap 模型) {model.addAttribute("ProjectList", ProjectService.getStudentProject(regNo));返回查找"；}}

我在 WEB-INF/jsp 文件夹下有一个名为 find.jsp 的页面.但是当我点击 localhost:8080/find 我得到

HTTP 状态 400 错误

以下是我进行映射的 dispatcher-servlet.xml

<mvc:注解驱动/><context:component-scan base-package="com.MyAppName.www"/><!-- 创建 Mongo 实例的工厂 bean --><bean id="mongo" class="org.springframework.data.mongodb.core.MongoFactoryBean"><property name="host" value="localhost"/></bean><!-- MongoTemplate 用于连接和查询数据库中的文档--><bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate"><constructor-arg name="mongo" ref="mongo"/><constructor-arg name="databaseName" value="MyApp"/></bean><!-- 使用这个后处理器来翻译@Repository 注释类中抛出的任何 MongoExceptions --><bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/><bean id="jspViewResolver"class="org.springframework.web.servlet.view.InternalResourceViewResolver"p:prefix="/WEB-INF/jsp"p:suffix=".jsp"/><bean class="org.springframework.web.servlet.view.tiles2.TilesViewResolver"/><bean类=org.springframework.web.servlet.view.tiles2.TilesConfigurer"><属性名称=定义"><列表><value>/WEB-INF/views/views.xml</value></list></属性></bean></豆类>

这就是 web.xml 的样子

<web-app xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"版本=2.5"><display-name>Spring 与 MongoDB Web 应用程序</display-name><小服务程序><servlet-name>调度程序</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><启动时加载>1</启动时加载><servlet-mapping><servlet-name>调度程序</servlet-name><url-pattern>/</url-pattern></servlet-mapping><上下文参数><param-name>contextConfigLocation</param-name><param-value>/WEB-INF/dispatcher-servlet.xml</param-value></context-param><监听器><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></监听器><欢迎文件列表><welcome-file>/WEB-INF/find.jsp</welcome-file></welcome-file-list></web-app>

这就是我的服务器日志的样子.我使用的是 Tomcat 7.0

Sep 12, 2014 1:24:21 AM org.apache.coyote.AbstractProtocol start信息:启动 ProtocolHandler ["http-bio-8080"]2014 年 9 月 12 日上午 1:24:21 org.apache.coyote.AbstractProtocol 开始信息:启动 ProtocolHandler [ajp-bio-8009"]2014 年 9 月 12 日上午 1:24:21 org.apache.catalina.startup.Catalina start信息:服务器在 502 毫秒内启动

我使用的 url 是 localhost:8080/find.jsp 并且我收到 404 错误.

views.xml 的定义标签也有问题

<瓷砖定义><定义名称="模板"模板="/WEB-INF/jsp/main_template.jsp"><put-attribute name="top"value="/WEB-INF/jsp/tiles/header.jsp"/><put-attribute name="side"value="/WEB-INF/jsp/tiles/footer.jsp"/> </定义><definition name="home" extends="template">定义主页磁贴 <put-attribute name="content" value="/WEB-INF/jsp/find.jsp"/></定义></tiles-定义>

解决方案

更改 ProjectService 属性以开始小写.删除 @RequestParam 因为这是一个起始页.

 @Controller公共类项目控制器{@自动连线私人项目服务项目服务；@RequestMapping(value={"/","/find"} , method = RequestMethod.GET)公共字符串 getPersonList(ModelMap 模型) {model.addAttribute("ProjectList", projectService.getStudentProject());返回查找"；}}

Here is the controller that I use

@Controller

public class ProjectController {

    @Autowired

    private ProjectService ProjectService;

    @Autowired
    public ProjectController(ProjectService ProjectService){
        this.ProjectService = ProjectService;
    }


        @RequestMapping({"/","/find"})
        public String getPersonList(@RequestParam("regNo") String regNo, ModelMap model) {  

            model.addAttribute("ProjectList", ProjectService.getStudentProject(regNo));  

            return "find";  
        }  
}

I have a page called find.jsp under WEB-INF/jsp folder. But when I hit localhost:8080/find I get

HTTP status 400 error

Following is my dispatcher-servlet.xml where I have made the mappings

<?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:context="http://www.springframework.org/schema/context"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:beans="http://springframework.org/schema/beans"
       xsi:schemaLocation="http://www.springframework.org/schema/beans/spring-beans.xsd 
       http://www.springframework.org/schema/context/spring-context.xsd       
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/task/spring-task.xsd">

    <mvc:annotation-driven/>

    <context:component-scan base-package="com.MyAppName.www" />

    <!-- Factory bean that creates the Mongo instance -->
    <bean id="mongo" class="org.springframework.data.mongodb.core.MongoFactoryBean">
        <property name="host" value="localhost" />
    </bean>

    <!-- MongoTemplate for connecting and quering the documents in the database -->
    <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
        <constructor-arg name="mongo" ref="mongo" />
        <constructor-arg name="databaseName" value="MyApp" />
    </bean>

    <!-- Use this post processor to translate any MongoExceptions thrown in @Repository annotated classes -->
    <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />

    <bean id="jspViewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver"
          p:prefix="/WEB-INF/jsp"
          p:suffix=".jsp" /> 

    <bean class="org.springframework.web.servlet.view.tiles2.TilesViewResolver"/>

    <bean class=
    "org.springframework.web.servlet.view.tiles2.TilesConfigurer">
  <property name="definitions">
    <list>
      <value>/WEB-INF/views/views.xml</value>
    </list>
  </property>
</bean>    

</beans>

This is how web.xml looks

<web-app xmlns="http://java.sun.com/xml/ns/javaee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
        version="2.5">

  <display-name>Spring With MongoDB Web Application</display-name>

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

    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/dispatcher-servlet.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <welcome-file-list>
       <welcome-file>/WEB-INF/find.jsp</welcome-file>
    </welcome-file-list> 
</web-app>

This is how my server log looks like. I am using Tomcat 7.0

Sep 12, 2014 1:24:21 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Sep 12, 2014 1:24:21 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Sep 12, 2014 1:24:21 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 502 ms

The url I use is localhost:8080/find.jsp and I get 404 error.

I also have a problem in definition tag of views.xml

<!DOCTYPE tiles-definitions PUBLIC
      "-//Apache Software Foundation//DTD Tiles Configuration 2.1//EN"
      "http://tiles.apache.org/dtds/tiles-config_2_1.dtd">

<tiles-definitions>
   <definition name="template" template="/WEB-INF/jsp/main_template.jsp">
     <put-attribute name="top"
                    value="/WEB-INF/jsp/tiles/header.jsp" />
     <put-attribute name="side"
                    value="/WEB-INF/jsp/tiles/footer.jsp" />

   </definition>

    <definition name="home" extends="template">Define home tile
             <put-attribute name="content" value="/WEB-INF/jsp/find.jsp" />
    </definition>
</tiles-definitions>

解决方案

Change ProjectService attribute to start lowercase. Remove the @RequestParam since this is a start page.

 @Controller
    public class ProjectController {

    @Autowired
    private ProjectService projectService;

     @RequestMapping(value={"/","/find"} , method = RequestMethod.GET)
     public String getPersonList(ModelMap model) {  

                model.addAttribute("ProjectList", projectService.getStudentProject());  

                return "find";  
     }  
 }

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