struts2注解配置Action及拦截器几种不同方式写法对应的路径指向

本工程中：

Action类的类路径：com.xxx.xxx.main.action.LotteryAction 需要拦截器检查是否登录

com.xxx.xxx.main.action.ActivityAction 不需要拦截器

相关页面路径：WebRoot/page/lottery 和 WebRoot/page/activity

Struts.xml:

拦截器配置方式：（此部分讲拦截器配置，不用看Action方法注解上的value与results，这些在下面讲Action配置时会讲到，因为Action类声明上的注解与方法上的注解搭配不同，可以导致Action方法注解上的value与results中路径写法不同）

第一种方式，不按包拦截，拦截器配置到全局根包路径下，以具体的Action方式中引用为准

@Controller("lotteryAction")
public class LotteryAction extends AbstratcBusiAction {

      @org.apache.struts2.convention.annotation.Action(value = "/lottery/doLottery",
            results = {
                    @Result(name = "success", type = "freemarker", location = "../page/lottery/lotteryresult.ftl"),
                    @Result(name = "fail", type = "freemarker", location = "../page/lottery/failedmessage.ftl")
            }
        ,interceptorRefs = {@InterceptorRef(value = "checkLoginStack"),@InterceptorRef(value = "defaultStack") } //这就是在Action方法中指定需要的拦截器，没有这一段，则该Action进入前不会进拦截器
            )
    public String doLottery() {

......

}

第二种方式：以包拦截，配置如下：

<package name="crud-default" extends="convention-default">
        
    </package>

    <package name="struts-interceptor" extends="crud-default" namespace="/activity" >
        <interceptors>
            <interceptor name="checkLogin" class="logginInterceptor"/>
            <interceptor-stack name="checkLoginStack">
                <interceptor-ref name="checkLogin"/>                将拦截器在本包中定义，在本包中引用
                <interceptor-ref name="defaultStack"/>
            </interceptor-stack>
        </interceptors>
        <default-interceptor-ref name="checkLoginStack"/> //此句表明该包下的所有Action均会启用checkLogin 拦截器
    </package>

或

<package name="crud-default" extends="convention-default">
        <interceptors>
            <interceptor name="checkLogin" class="logginInterceptor"/>
            <interceptor-stack name="checkLoginStack">
                <interceptor-ref name="checkLogin"/>              将拦截器在全局包中定义，在需要用到的包中指明引用
                <interceptor-ref name="defaultStack"/>
            </interceptor-stack>
        </interceptors>
    </package>

    <package name="struts-interceptor" extends="crud-default" namespace="/activity">
        
        <default-interceptor-ref name="checkLoginStack"/>    在本包中指明需要引用这个拦截器
    </package>

@Controller("lotteryAction")

@ParentPackage(value = "struts-interceptor") 这一句一定不能少，一定显式指明这个Action类属于 struts-interceptor包下，则类中定义的所有Action方式均会生效
public class LotteryAction extends AbstratcBusiAction {

@org.apache.struts2.convention.annotation.Action(value = "/lottery/doLottery" , 此处即使上述的配置文件中namespace="/activity"，而此处的 value = "/lottery/doLottery"，(换成 value = "/ activity /doLottery" 也一样)都不会影响该拦截器的生效，关键就在于类声明注解上的 @ParentPackage(value = "struts-interceptor")

            results = {
                    @Result(name = "success", type = "freemarker", location = "../page/lottery/lotteryresult.ftl"),
                    @Result(name = "fail", type = "freemarker", location = "../page/lottery/failedmessage.ftl")
            }
//        ,interceptorRefs = {@InterceptorRef(value = "checkLoginStack"),@InterceptorRef(value = "defaultStack")}    上述配置中加上了default-interceptor-ref 表明 struts-interceptor包下所有Action都启用checkLoginStack拦截器 ,所以此处已不需要特别指定了
            )
     public String doLottery() {

....

｝

下面讲下Action类声明注解及action方式注解的几种搭配配置方式：

第一种：Action类声明中不作特殊注解，完全以action方法上的注解为准

@Controller("lotteryAction")
public class LotteryAction extends AbstratcBusiAction {

       @org.apache.struts2.convention.annotation.Action(
            value = "/lottery/showLotteryInfo" ,
            results = {
                    @Result(name = "success", type = "freemarker", location = "../page/lottery/lotteryinfo.ftl" ),
                    @Result(name = "fail", type = "freemarker", location = "../page/lottery/failedmessage.ftl")

            })
      public String showLotteryInfo() {

......

}

｝

在此种方式中，由于Action类声明中没有 @Namespace("/lottery")，Struts2解析器会根据这个action方法中的value = "/lottery/showLotteryInfo"把该action方法的 Namespace解析为 /lottery ( value = "/ activity /showLotteryInfo"则会将 Namespace解析为 activity ),由于使用了convention插件，插件会根据解析出来的 Namespace 为 lottery，按照约定优于配置的原则到 WebRoot/ lottery/下去寻找 s uccess指向的页面，而在本工程中的一开始就说明了页面在WebRoot/page/lottery下，则不是直接在WebRoot/ lottery/，故此处填上 ../page/lottery/lotteryinfo.ftl是一个相对于 WebRoot/ lottery/的相对地址。

( <constant name="struts.convention.result.path" value="/"/>决定了 convention插件去的起始寻找地址，这里配置的/即指向 WebRoot，再加上解析出来的 Namespace为 lottery，所以去 WebRoot/ lottery/下去寻找页面，如果 <constant name="struts.convention.result.path" value="/page"/>,则 convention插件去的起始寻找地址为/ WebRoot/page/再加上解析出来的 Namespace为 lottery，就会去 WebRoot/page/ lottery/去寻找页面，这样的话， location = "lotteryinfo.ftl"即可)

第二种方式：Action类声明中注解指定Namespace

A、action名中带/

@Controller("lotteryAction")
@Namespace("/lottery ")
public class LotteryAction extends AbstratcBusiAction {

      @org.apache.struts2.convention.annotation.Action(
            value = "/ showLotteryInfo" , 带/
            results = {
                    @Result(name = "success", type = "freemarker", location = "/page/lottery/lotteryinfo.ftl" ),
                    @Result(name = "fail", type = "freemarker", location = "/page/lottery/failedmessage.ftl")

            })
    public String showLotteryInfo() {...}

}

此种方式中value = "/ showLotteryInfo"， location=的值将会以简单的字符串拼接形式组成，(除非location="/"开头的绝对地址)

location = ".. /page/lottery/lotteryinfo.ftl"，去向的地址将会是： WebRoot/ lottery/ ../page/lottery/lotteryinfo.ftl，这是错误的（这是 convention插件根据 @Namespace("/lottery")解析出来的寻找页面起始为" WebRoot / lottery / "+" ../page/lottery/lotteryinfo.ftl "）拼接而成。

location = "/page/lottery/lotteryinfo.ftl"，去向的地址将会是： WebRoot /page/lottery/lotteryinfo.ftl，这是正确的（因为location=/开头，表始绝对地址WebRoot，无论 <constant name="struts.convention.result.path" value="/"/>还是<constant name="struts.convention.result.path" value="/page"/>,这个以/开头的 location = "/page/lottery/lotteryinfo.ftl"始终是指向 WebRoot /page/lottery/lotteryinfo.ftl的）

总结： value = "/ showLotteryInfo"这种action名中带/的方式，不会对location指向的一个由./或../开头的相对地址进行解析的，对location指向由/开头的，无论<constant name="struts.convention.result.path" value="？"/>，始终将/解析成WebRoot.

B、action名中不带/

@Controller("lotteryAction")
@Namespace("/lottery ")
public class LotteryAction extends AbstratcBusiAction {

      @org.apache.struts2.convention.annotation.Action(
            value = "showLotteryInfo" , 不带/
            results = {
                    @Result(name = "success", type = "freemarker", location = "/page/lottery/lotteryinfo.ftl" ),
                    @Result(name = "fail", type = "freemarker", location = "/page/lottery/failedmessage.ftl")

            })
    public String showLotteryInfo() {...}

}

location = ".. /page/lottery/lotteryinfo.ftl"，去向的地址将会是： WebRoot /page/lottery/lotteryinfo.ftl，这是正确的（这是 convention插件根据 @Namespace("/lottery")解析出来的寻找页面起始为" WebRoot / lottery/ "

这个地址的../也就是上一级目录下的page/lottery/lotteryinfo.ftl，此时的 <constant name="struts.convention.result.path" value="/"/>；

如果此时的<constant name="struts.convention.result.path" value="/page"/>，则解析出来的寻找页面起始为WebRoot/ page/ lottery/ , location = ".. /page/lottery/lotteryinfo.ftl"就会变成 WebRoot/ page /page/lottery/lotteryinfo.ftl，这是错误的，应同步修正成 location = "lotteryinfo.ftl"即可，不能是 location = "/ lotteryinfo.ftl"（带上/就变成了 WebRoot/ lotteryinfo.ftl 这个地址了）

总结：value = "showLotteryInfo"这种action名中不带/的方式，将会对location指向的一个由./或../开头的相对地址进行解析的，对location指向由/开头的，无论<constant name="struts.convention.result.path" value="？"/>，始终将/解析成WebRoot.

本工程使用到的相关jar包

<dependencies>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>2.5.6</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>2.5.6</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>2.5.6</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>2.5.6</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>2.5.6</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>2.5.6</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>2.5.6</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>2.5.6</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>2.5.6</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>2.5.6</version>
            <scope>compile</scope>
        </dependency>

        
        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.18</version>
        </dependency>
        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-core</artifactId>
            <version>2.1.8</version>
        </dependency>
        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-spring-plugin</artifactId>
            <version>2.1.8</version>
        </dependency>
        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-convention-plugin</artifactId>
            <version>2.1.8</version>
        </dependency>

        
        <dependency>
            <groupId>spy</groupId>
            <artifactId>spymemcached</artifactId>
            <version>2.7.3</version>
        </dependency>
        <dependency>
            <groupId>com.experlog</groupId>
            <artifactId>xapool</artifactId>
            <version>1.6-beta</version>
        </dependency>
        <dependency>
            <groupId>javax.transaction</groupId>
            <artifactId>jta</artifactId>
            <version>1.1</version>
        </dependency>
        <dependency>
            <groupId>postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>9.0-801.jdbc4</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <dependency>
            <groupId>commons-pool</groupId>
            <artifactId>commons-pool</artifactId>
            <version>1.5.5</version>
        </dependency>
        <dependency>
            <groupId>org.apache.ibatis</groupId>
            <artifactId>ibatis-sqlmap</artifactId>
            <version>2.3.4.726</version>
        </dependency>
        
        <dependency>
            <groupId>com.atomikos</groupId>
            <artifactId>atomikos-util</artifactId>
            <version>3.7.0</version>
        </dependency>
        <dependency>
            <groupId>com.atomikos</groupId>
            <artifactId>transactions</artifactId>
            <version>3.7.0</version>
        </dependency>
        <dependency>
            <groupId>com.atomikos</groupId>
            <artifactId>transactions-api</artifactId>
            <version>3.7.0</version>
        </dependency>
        <dependency>
            <groupId>com.atomikos</groupId>
            <artifactId>transactions-jta</artifactId>
            <version>3.7.0</version>
        </dependency>
        <dependency>
            <groupId>com.atomikos</groupId>
            <artifactId>transactions-osgi</artifactId>
            <version>3.7.0</version>
        </dependency>
        <dependency>
            <groupId>com.atomikos</groupId>
            <artifactId>transactions-jms-deprecated</artifactId>
            <version>3.7.0</version>
        </dependency>
        <dependency>
            <groupId>com.atomikos</groupId>
            <artifactId>transactions-jms</artifactId>
            <version>3.7.0</version>
        </dependency>
        <dependency>
            <groupId>com.atomikos</groupId>
            <artifactId>transactions-jdbc</artifactId>
            <version>3.7.0</version>
        </dependency>

        
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.6.12</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.12</version>
        </dependency>
        <dependency>
            <groupId>cglib</groupId>
            <artifactId>cglib-nodep</artifactId>
            <version>2.2.2</version>
        </dependency>
        <dependency>
            <groupId>aopalliance</groupId>
            <artifactId>aopalliance</artifactId>
            <version>1.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.mina</groupId>
            <artifactId>mina-core</artifactId>
            <version>2.0.4</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jdmk</groupId>
            <artifactId>jmxtools</artifactId>
            <version>1.2.1</version>
        </dependency>
        <dependency>
            <groupId>javax.management</groupId>
            <artifactId>jmxremote_optional</artifactId>
            <version>1.0.1_04</version>
        </dependency>
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.2</version>
        </dependency>
        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>3.2.1</version>
        </dependency>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.5</version>
        </dependency>
        <dependency>
            <groupId>com.caucho</groupId>
            <artifactId>hessian</artifactId>
            <version>4.0.7</version>
        </dependency>

        
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.6.1</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-nop</artifactId>
            <version>1.6.4</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.4</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.struts.xwork</groupId>
            <artifactId>xwork-core</artifactId>
            <version>2.2.3.1</version>
        </dependency>
    </dependencies>

struts2注解配置Action及拦截器几种不同方式写法对应的路径指向

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