struts-2.3.31 and struts-2.5.10 introduce jars and configure Web.xml and Struts.xml__web

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In struts learning process, many tutorials are used strut-2.3.31, and now the latest is struts-2.5.10, after the upgrade STRUT2 skills will always be a bit of a change. Also thought that as long as the tutorial on the line, did not expect to keep the error, simply can not let people enjoy the fun of knocking code. struts-2.3.31 1. Introducing Jars

Asm-3.3.jar
asm-commons-3.3.jar
asm-tree-3.3.jar
Commons-fileupload-1.3.1.jar
Commons-io-2.2.jar
commons-lang3-3.1.jar
commons-logging-1.1.3.jar
Freemarker-2.3.19.jar
Jarlist.txt
javassist-3.11.0.ga.jar
ognl-3.0.6.jar
Struts2-core-2.3.16.3.jar
Xwork-core-2.3.16.3.jar

2. 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_2_5.xsd " 
version=" 2.5 ">
  <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>

3. Struts.xml

<?xml version= "1.0" encoding= "UTF-8"?> <!
DOCTYPE struts public
    "-//apache Software foundation//dtd struts Configuration 2.3//en"
    "http:// Struts.apache.org/dtds/struts-2.3.dtd ">
<struts>
    <constant name=" Struts.devmode "value=" true "/>
    <!--all action definitions should be placed under package--> <package name=" Crazyit "namespace="   
    /"extends=" Struts-default ">     
        <action name=" * ">
            <result>/WEB-INF/content/{1}.jsp</result>
        </action>
    </package>
</struts>

struts-2.5.10 1. Introduce jar

Asm-5.1.jar
asm-commons-5.1.jar
asm-tree-5.1.jar
Commons-fileupload-1.3.2.jar
Commons-io-2.4.jar
commons-lang3-3.4.jar
commons-logging-1.1.3.jar
Freemarker-2.3.23.jar
Jarlist.txt
javassist-3.20.0-ga.jar
log4j-api-2.7.jar
Ognl-3.1.12.jar
Struts2-core-2.5.10.jar

Compared to the struts-2.3.31,2.5.10 version need to import the basic jar Xwork-core-2.3.16.3.jar, more log4j-api-2.7.jar. Because Xwork-core has been integrated into the struts-core, so here we download struts-2.5.10/lib can't find xwork-core words, but we can use decompression software to open the Struts-core to view the internal files, You can find xwork that were not in the previous version. If there is no Log4j-api-2.7.jar ', if the Web.xml and Struts.xml are configured correctly, the error will be the following:

2. Web.xml

<?xml version= "1.0" encoding= "UTF-8"?> <web-app "id= starter" version= "2.4" xmln s= "Http://java.sun.com/xml/ns/j2ee" xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance" Xsi:schemaloca
        tion= "Http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" > <filter> <filter-name>struts2</filter-name> <!--<filter-class>org.apache.struts2.disp
        Atcher.ng.filter.strutsprepareandexecutefilter</filter-class>--> <!--There are no NG directories in the following path--> <filter-class>org.apache.struts2.dispatcher.filter.strutsprepareandexecutefilter </filter-class> &L t;/filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern> ;/*</url-pattern> </filter-mapping> </web-app> 

Careful readers can find a big difference is that 2.5.10 version Configuration <filter-class> Specifies that one ng is missing from the classpath. Yes, there is no mistake, we just open struts2-core-2.5.10.jar to find that there is no subdirectory ng. It is only through the path above that the class Strutsprepareandexecutefilter can be found. If you do not configure the correct path, the following error is reported:

3. Struts.xml

<?xml version= "1.0" encoding= "UTF-8"?> <!
DOCTYPE struts public
    "-//apache Software foundation//dtd struts Configuration 2.5//en"
    "http:// Struts.apache.org/dtds/struts-2.5.dtd ">

<struts>
    <constant name=" Struts.devmode "value=" true "/>
    <!--all action definitions should be placed under package--> <package name=" Crazyit "namespace="   
    /"extends=" Struts-default ">     
        <action name=" * ">
            <result>/WEB-INF/content/{1}.jsp</result>
        </action>
    </package>
</struts>