Question

我在Netbeans 7.3中制作了简单的helloworld。但我有负载jsp与控制器的值有问题。我部分启发了http://www.tutorialspoint.com/spring/spring_tutorial.pdf（第141页）的说明。但是当我想要在控制器中设置的值加载jsp时，不显示值。在控制器中捕获GET请求。我输入了这个网址：http://localhost:8080/HelloWorld3/hello.htm。我得到了jsp，但没有显示值。当我输入上面教程中写的url时： http://localhost:8080/HelloWeb/hello，我收到404错误，找不到此页面。我必须输入什么网址或者我做得更糟？我想这个错误是在一些配置文件中。谢谢

applicationContext.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:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation=" 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">
    <context:component-scan base-package="cz.ryska.controllers"/>

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

dipatcher-servlet.xml中

<?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:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

    <bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>

    <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="index.htm">indexController</prop>
                <prop key="hello.htm">helloController</prop>
            </props>
        </property>
    </bean>

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

    <bean name="indexController"
          class="org.springframework.web.servlet.mvc.ParameterizableViewController"
          p:viewName="index" />

    <bean name="helloController"
          class="org.springframework.web.servlet.mvc.ParameterizableViewController"
          p:viewName="hello" />

</beans>

的web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="3.0" 
            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_3_0.xsd">

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>2</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>*.htm</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>redirect.jsp</welcome-file>
    </welcome-file-list>
</web-app>

控制器：

@Controller
@RequestMapping("/hello") 
public class HelloController {

    @RequestMapping(method = RequestMethod.GET) 
    public String printHello(ModelMap model) {
        model.addAttribute("message", "Hello Spring MVC Framework!"); 
        return "hello"; 
    }
}

的hello.jsp：

<%@page contentType="text/html; charset=UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <title>JSP Page</title>
    </head>
    <body>
        <h1>Hello!!!!!!</h1>
        <h2>${message}</h2>
    </body>
</html>

Answer 1

试试这个

@Controller 
@RequestMapping("/hello") 
public class MyController {
     @RequestMapping(method = RequestMethod.GET)
     public String sayHello(ModelMap model) {
         model.addAttribute("message", "Spring 3 MVC Hello World");
         return "hello";
     } 
}

的hello.jsp

<html>
<body>
        <h1>Message : ${message}</h1>
</body>

的web.xml

 <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>
<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>

调度-servlet.xml中

 <?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"
       xsi:schemaLocation="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">


    <context:component-scan base-package="com.gemini.spring.mvc"/>

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

</beans>

Answer 2

您是否有某种特殊原因以您的方式编写了helloWorld应用程序？对于一个简单的helloWorld应用程序来说，它看起来似乎很复杂。

除非您有某种特定原因，否则您根本不需要定义两个独立的控制器。

我还完成了你链接的tutorialspoint示例，并且我的工作完美，但它是原始示例的克隆。

如果你想扩展或玩弄这个例子，我建议你先克隆这个例子然后让它运转起来......然后从那里继续前进，一步一步。

虽然我没有在我面前提出解决方案，但Georgy Gobozov给出的答案看起来是正确的。

Spring 3.0新手启动项目不显示值

2 个答案: