ejb2 ejb-jar.xml header

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems,
Inc.//DTD Enterprise JavaBeans 2.0//EN"
"http://java.sun.com/j2ee/dtds/ejb-jar_2_0.dtd">

struts normal action can't be a mapping dispatch action

A Mapping dispatch action uses the execute method to call the apropiate method, so you can't use normal action and as MappingDispatchAction, is one or the other but not both!

Action Errors and ActionError(deprecated)

The title says it all. Action Error is a class used only for struts 1.1, further versions replace ActionError for ActionMessage

order for tags in a struts-config.xml file

In Struts 1.1 it's important to declare all tags in the next order:

• data-sources
• form-beans
• global-exceptions
• global-forwards
• action-mappings
• controller
• message-resources
• plug-in
  

headers for struts-config.xml

You need always to define a DTD for your struts-config, for 1.1 version next lines are needed:

<?xml version="1.0" ?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.1//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">

And for 1.3:

<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
"http://struts.apache.org/dtds/struts-config_1_3.dtd">

Servlet Headers

When you want to use the 2.3 servlet specification add the next lines(dtd) to get down to work:

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">


If you want to use the 2.4 servlet specification, you need to add the next lines(schema):


<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xsi="http://www.w3.org/2001/XMLSchema-instance" schemalocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">