Re-implementing the preceding
example i.e, registration process example to use validation frame work. The
additional code that has to be included into the respective files compared to
the proceeding example are shown in bold letters, the following listing shows
the Refistration.jsp
The additional code that has to
be included into the respective files compared to the proceeding example are
shown in bold letters, the following listing shows the Registration.jsp
Registration.jsp
<html><body>
<font color=”red” size=”5”>
<html:errors/><br/>
</font>
<html form action=”register”><pre>
UserName:<html:text
property=”uname” size=”25”/>,br>
PassWord:<html:password
property=”pass” size=”25”/><br>
Email
:<html:text property=”email” size=”25”/><br>
Address:<html:text
property=”address” size=”25”/><br.
Mobile :<html:text property=”mobile” size=”25”/><br>
<html:submit>Register</html:submit>
</pre></html:form>
</body></html>
The following listing shows Home.jsp
<html><body.
<b>Welcome</b><bean write name=”registerform”
property=”uname”/>
</body></html>
The following listing shows the RegisterAction.java, which
demonstrate how to read the data from the DynaActionForm
RegisterAction.java
Package com.chandra.struts;
Import org.apache.struts.action.*;
Import javax.servelt.http.*;
Import java.sql.*;
Public class RegisterAction extends Action{
Public RegisterAction(){
try{Class.forName(“oracle.jdbc.driver.OracleDriver”);}
Catch(Exception e){}
}//cons
Public ActionForward execute(ActionMapping am,ActionForm
af,HttpServletRequest req,
HttpServletResponse
res)throws Exception{
DynaActionForm daf =(DynaActionForm)af;
Connection con=null;
Try{
Con=DriverManager
getConnection(“jdbc:oracle:thin:@localhost:1521:xe”,”scott”,”tiger”);
PreparedStatement ps = con.preparedStatement(“insert into
userdetails values(?,?,?,?,?,?)”);
Ps.setString(1,(String)daf.get(“uname”));
Ps.setString(2,(String)daf.get(“pass”));
Ps.setString(3,(String)daf.get(“email”));
Ps.setString(4,(String)daf.get(“address”));
Ps.setInt(5,(Integer)daf.get(“mobile”)).intValue());
Ps.setString(6,”user”);
If(ps.executeUpdate()==1)
Return am.findForward(“success”);
}//try
Finally(con.close())
Return am.findForward(“fail”);
}//execute
}//class
The following listing shows the
struts configuration that includes the dynamic validation form bean declaration
and the validated plugin configuration.
Struts-config.xml
<struts-config>
<form-beans>
<form-bean name=”registerform”
type=”org.apache.struts.validator.DynaValidatorForm”>
<form-property
name=”uname” type=”java.lang.String”/>
<form-property
name=”pass” type=”java.lang.String”/>
<form-property name=”email” type=”java.lang.String”/>
<form-property name=”address” type=”java.lang.String”/>
<form-property name=”mobile” type=”java.lang.Integer”/>
</form-beans>
<action-mappings>
<action path=”/register”
type=”com.chandra.struts.RegisterAction” name=”registerform”
Scope=”session”
validate=”true” input=”/Registration.jsp”>
<forward name=”success”
path=”/Home.jsp”/>
<forward name=”fail” path=”/Registration.jsp”/>
</action>
</action-mappings>
<message-resources
parameter=”ApplicationREsources”/>
<plug-in
className=”org.apche.struts.validator.ValidatorPlugIn”>
<set-property property=”pathnames” value=”/WEB-INF/validator-rules.xml,
/WEB-INF/validation.xml”/>
</plug-in>
</struts-config>
The following listing shows the
validation.xml, which includes the validation rules for the registerform
fields.
Validation.xml
<form-validation>
<formset>
<form name=”registerform”>
<field property=”uname”
depends=”required”>
<arg0 key=”uname”/>
</field>
<field property =”pass” depends=”required,minilength,maxlength”>
<arg0 key=”pass”/>
<arg1 key=”4” resource=”false” name=”minilength”/>
<arg1 key=”${var.maxlength}” resource=”false” name=”maxlength”/>
<var>
<var-name>minilength</var-name>
<var-value>4</var-value>
</var>
<var>
<var-name>maxlength</var-name>
<var-value>15</var-value>
</var>
</field>
<field property=”email” depends=”required.email”>
<arg0 key=”email”/>
</field>
<field property=”address” depends=”required,email”>
<arg0 key=”address”/>
</field>
</form>
</formset>
</form-validation>
The following listing shows the
ApplicationResources_en.properties file, this file contains the error messages
that have to be presented in case of any errors.
ApplicationResources_en.properties
#ApplicationResources.properties
Uname=<b>User Name</b>
Pass=<b>Password</b>
Email=<b>Email ID</b>
Address=<b>Address</b>
#error keys(used by validator framework)
Errors.required=<li><i>{0}field cannot be empty</i></li></br>
Errors.minilength=<li><i>{0}can not be less than
{1} characters</li><br/>
Errors.maxlength=<li><i>{0]can not be grater
than{1}
Characters</i></li><br/>
Errors.email=<li><i>{0}is an invalid e-mail
address</i></li><br/>
The following listing shows the web.xml file that is same as
of the other examples that demonstrate up to now in this post
Web.xml
<web-app>
<servlet>
<servlet-name>as</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>as</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
After writing the files in the
above listings compile the RegisterAction.java and arrange the files and deployed
into web server
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