Struts 2.x 整合 Spring 3.x

參考文件

以第一篇的HelloWorld來修改

※XML設定

pom.xml

<dependency>
    <groupId>org.apache.struts</groupId>
    <artifactId>struts2-core</artifactId>
    <version>2.3.24</version>
</dependency>
    
<dependency>
    <groupId>org.apache.struts</groupId>
    <artifactId>struts2-spring-plugin</artifactId>
    <version>2.3.24.1</version>
</dependency>
    
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>3.2.13.RELEASE</version>
</dependency>
    
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>3.2.13.RELEASE</version>
</dependency>
    
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>3.2.13.RELEASE</version>
</dependency>
    
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>3.2.13.RELEASE</version>
</dependency>

※主要是struts2-spring-plugin-2.x.x.x.jar，但我其他的spring-x都是3.0.5，應該也是可以執行，但我的spring是下載3.2.13的，乾脆全部統一比較不會有問題

web.xml

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/applicationContext*.xml,classpath*:applicationContext*.xml</param-value>
</context-param>
    
<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>
    
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

※注意放的位置有順序，錯誤訊息會提示

※context-param是在設定有多個applicationContext開頭，.xml結尾的，一起抓進來，可以只設定一個，多個用「,」隔開

struts.xml

<constant name="struts.objectFactory" value="spring" />
<constant name="struts.devMode" value="false" />
<!-- <constant name="struts.objectFactory.spring.autoWire" value="type" /> -->
    
<package extends="struts-default" name="basicstruts2">
    <action name="index">
        <result>/index.jsp</result>
    </action>
    
    <action class="xxx" method="execute" name="hello">
        <result name="success">/HelloWorld.jsp</result>
    </action>
</package>

※原本的action class是要打package.class，現在可以隨便打，只要對應到applicationContext.xml的id或name就可以了，struts.devMode也可以不用

applicationContext.xml

<bean id="xxx" class="action.HelloWorldAction" />
<bean id="msg" class="model.MessageStore" />

※struts.xml有一行註解了，依參考文件拖到最下面有一張表，還有七個可以做設定，我目前這樣就可以run成功了

※Annotation設定

pom.xml增加

<dependency>
    <groupId>org.apache.struts</groupId>
    <artifactId>struts2-convention-plugin</artifactId>
    <version>2.3.24</version>
</dependency>

※版本和struts2-core一樣，不然有可能啟動時出現「java.lang.NoClassDefFoundError: org/apache/commons/lang/xwork/StringUtils」，找不到類別的錯誤

HelloWorldAction.java

@Namespace(value = "/")
@Controller
public class HelloWorldAction extends ActionSupport {
    private MessageStore messageStore;
    // setter/getter...
    
    @Action(value = "hello", results = { @Result(name = "success", location = "/HelloWorld.jsp") })
    @Override
    public String execute() throws Exception {
        messageStore = new MessageStore();
        return SUCCESS;
    }
}

※注意使用annotation時，action要放在包名叫struts、struts2、action、actions四者之一，否者就會出「There is no Action mapped for namespace [/] xxx」的錯，這四個名字可以有子包，只要和applicationContext.xml的class對應好就行

※struts.xml留第一行就好，applicationContext.xml空的即可，MessageStore上面增加@Service就OK了