我的第一个SSH整合(使用Maven坐标)

web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app 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">

    <!--在这之前要先导入maven dependency坐标  -->

    <context-param>  

         <param-name>contextConfigLocation</param-name>  

         <param-value>classpath:applicationContext.xml</param-value>  

    </context-param>  

    <listener>  

          <!--ctrl+左键有显示下划线表示导入成功  -->

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

    </listener> 

    

     <!-- Struts2 核心过滤器  -->  

      <filter>  

            <filter-name>struts2</filter-name>  

      <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>  

 

      </filter>  

      <filter-mapping>  

            <filter-name>struts2</filter-name>  

            <url-pattern>/*</url-pattern>  

      </filter-mapping> 

</web-app>  struts.xml

<?xml version="1.0" encoding="UTF-8"?>  

<!DOCTYPE struts PUBLIC  

                    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"  

                    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

    <package name="default" namespace="/" extends="struts-default">

         <!-- class对应applicationContext.xml的界面层的bean id名-->

        <action name="index" class="categoryAction" method="list">

            <result>/index.jsp</result>

        </action>

    </package>

</struts>    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/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>samchen</groupId>

    <artifactId>mycinema</artifactId>

    <version>0.0.1-SNAPSHOT</version>

    <packaging>war</packaging>

     <!-- 写下面这个properties的好处是当使用springframework其他jar包时可以使用  

         ${springframework.version}  --> 

     <properties>

        <springframework.version>4.3.1.RELEASE</springframework.version>

    </properties>

    <dependencies>

        

        <!-- JSTL -->

        <dependency>

            <groupId>javax.servlet</groupId>

            <artifactId>jstl</artifactId>

            <version>1.2</version>

            <scope>runtime</scope>

        </dependency>

        <!-- Servlet API -->

        <dependency>

            <groupId>javax.servlet</groupId>

            <artifactId>javax.servlet-api</artifactId>

            <version>3.0.1</version>

            <scope>provided</scope>

        </dependency>

         <!-- 建议先导入Spring的相关坐标在导入Struts的相关坐标  -->  

        <!-- Spring DI 容器  -->  

          <dependency>  

               <groupId>org.springframework</groupId>  

               <artifactId>spring-context</artifactId>  

               <version>${springframework.version}</version>  

          </dependency>  

          <!-- Spring Web -->

            <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-web</artifactId>

            <version>${springframework.version}</version>

            </dependency>

            

            <!-- Struts 2.3.20 -->

                <dependency>

                <groupId>org.apache.struts</groupId>

                <artifactId>struts2-core</artifactId>

                <version>2.3.20</version>

                </dependency>

                <!-- Struts2整合Spring插件 -->

                <dependency>

                <groupId>org.apache.struts</groupId>

                <artifactId>struts2-spring-plugin</artifactId>

                <version>2.3.20</version>

                </dependency>

    </dependencies>

  

    <build>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

                <version>3.3</version>

                <configuration>

                    <source>1.8</source>

                    <target>1.8</target>

                </configuration>

            </plugin>

        </plugins>

    </build>

</project>  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"  

        xsi:schemaLocation="http://www.springframework.org/schema/beans  

                http://www.springframework.org/schema/beans/spring-beans.xsd">  

       <!-- id为接口,class为实现类 -->

               <!-- 数据访问层 -->

    <bean id="categoryDao" class="mycinema.dao.impl.CategoryDaoImpl" />

            <!-- 业务逻辑层 -->  

    <bean id="categoryBiz" class="mycinema.biz.impl.CategoryBizImpl" > 

              <!-- 依赖注入

              name 为实现类的属性  -->

         <property name="categoryDao"  ref="categoryDao"></property>

     </bean>

         <!--  界面层  Struts2 Action -->  

              <!--scope="prototype" 表示非单例，默认是单例的  -->  

      <bean id="categoryAction" scope="prototype" class="web.action.CategoryAction">  

           <property name="categoryBiz" ref="categoryBiz"/>  

      </bean>  

  

</beans>   action类

package web.action;

import java.util.List;

import mycinema.biz.CategoryBiz;

import com.opensymphony.xwork2.ActionSupport;

public class CategoryAction extends ActionSupport {

    private CategoryBiz categoryBiz;

    public void setCategoryBiz(CategoryBiz categoryBiz) {

        this.categoryBiz = categoryBiz;

    }

    

    private List<String> categoryList;

    public List<String> getCategoryList() {

        return categoryList;

    }

    public String list(){

        this.categoryList = categoryBiz.getAll();

        return SUCCESS;

    }

}

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

    pageEncoding="UTF-8"%>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Insert title here</title>

</head>

<body>

    <ul>

        <c:forEach var="c" items="${categoryList }">

        <li>${c}</li>

        </c:forEach>

    </ul>

</body>

</html>  

SSH整合抛异常：action未发现。

检查步骤：

1、看看你struts.xml文件中action中对应的class属性的值是否可以在Spring的配置文件中找到对应的id值。
2、如果你确定你的配置没有出现问题，那么一定是你导入包的时候少了包，这时候你检查下你的项目中是否有以下三个jar包，struts2-spring-plugin-2.0.11.1.jar、commons-fileupload-1.2.1.jar和commons-io-1.3.2.jar。