Question

我在设置servlet时遇到问题。当我添加到app.servlet.xml时，到达我的控制器方法的参数将自动为空。

我想在继续之前测试基本配置，但我无法解决这个问题。有人可以帮忙吗？

APP-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"
   xmlns:mvc="http://www.springframework.org/schema/mvc"
   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
   http://www.springframework.org/schema/mvc
   http://www.springframework.org/schema/mvc/spring-mvc.xsd">

   <!-- Scans the classpath of this application for @Components to deploy as beans -->
   <context:component-scan base-package="com.app.controller" />

   <!-- Configures the @Controller programming model -->
   <mvc:annotation-driven/>

holaController：

@Controller
@RequestMapping("/")
public class HolaController {

 @RequestMapping("/hola/{id}")
 public ModelAndView hola(@PathVariable Integer id,
         HttpServletRequest httpServletRequest, 
         HttpServletResponse httpServletResponse){

  String mensaje = "<br><div><h2>Hola</h2></div><br><br>";

  return new ModelAndView("hola", "mensaje", mensaje);
 }

}

的web.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" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 
version="3.0">

<display-name>APP</display-name>

<servlet>
    <servlet-name>app</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>   
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/app-servlet.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>app</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>

<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

的pom.xml：

    <project xmlns="http://maven.apache.org/POM/4.0.0" 
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
      http://maven.apache.org/maven-v4_0_0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>com.app</groupId>
      <artifactId>app</artifactId>
      <packaging>war</packaging>
      <version>0.3</version>
      <name>app</name>
      <url>http://maven.apache.org</url>

      <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring.version>4.3.0.RELEASE</spring.version>
        <hibernate.version>4.3.11.Final</hibernate.version>
        <jackson.library>2.7.5</jackson.library>
      </properties>

      <dependencies>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
            <groupId>javax.inject</groupId>
            <artifactId>javax.inject</artifactId>
            <version>1</version>
        </dependency>

        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.7.4</version>
        </dependency>   

        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>

    <!-- -->    
    <!-- HIBERNATE -->
    <!-- -->

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>${hibernate.version}</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>${hibernate.version}</version>
        </dependency>

    <!-- -->    
    <!-- END HIBERNATE -->
    <!-- -->

    <!-- -->    
    <!-- LOGGER -->
    <!-- -->

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.5.2</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.5.2</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.6</version>
        </dependency>
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.1.1</version>
        </dependency>

    <!-- -->    
    <!-- END LOGGER -->
    <!-- -->

    <!-- -->    
    <!-- SPRING -->
    <!-- -->

            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-tx</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-orm</artifactId>
                <version>${spring.version}</version>
            </dependency>

    <!-- -->
    <!-- FIN SPRING -->
    <!-- -->

        </dependencies>

        <build>
            <finalName>app-web</finalName>
        </build>
    </project>

Answer 1

如果您希望所有servlet和过滤器共享任何其他设置/ bean配置，那么您需要在web.xml中添加以下配置

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


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

您的pom.xml

中也缺少

以及依赖项

     <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
    </dependency>

<mvc：annotation-driven>的问题

1 个答案: