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Working with User Input Ver 1.0 © 2005 Aptech Limited 1 Lab Deliverable 10 Working with User Input Part II 1. Create a user details page. The page should have First Name, Last Name, and Email address fields. On clicking the submit button, a new Web page should display the details entered by the user. Hint: Use getAttribute to display the user details. Solution: The files used in this exercise are: 1. index.jsp 2. displayname.jsp 3. NameForm.java 4. NameAction.java <%@ page language="java" %> <%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %> <html> <head> <title>Sample Struts Application</title> </head> <body> <h3> User Details</h3> <html:form action="Name" name="nameForm" type="example.NameForm" > <table width="80%" border="0"> <tr> <td><b>First Name:</b> <html:text property="name" /> </td> </tr> <tr> <td><b>Last Name:</b> <html:text property="last" /> </td> </tr> <tr> <td> <b>Email: </b> 2 Ver 1.0 © 2005 Aptech Limited JSP and Struts <html:text property="email" /> </td> </tr> <tr> <td><html:submit /> </td> </tr> </table> </html:form> </body> </html> Enter the code in Notepad and save the file as index.jsp in %TOMCAT_HOME%/webapps/ details. <html> <head> <title>Sample Struts Display Name</title> </head> <body> <h2> Confirm the Details You Entered</h2> <table width="80%" border="0"> <tr> <td> <b>First Name:</b><%= request.getAttribute("NAME") %> </td> </tr> <tr> <td> <b>Last Name:</b><%= request.getAttribute("LAST") %> </td> </tr> <tr> <td> <b>Email:</b><%= request.getAttribute("EMAIL") %></td> </tr> </table> </body> </html> Enter the code in Notepad and save the file as displayname.jsp in %TOMCAT_HOME%/ webapps/details. Working with User Input Ver 1.0 © 2005 Aptech Limited 3 package example; import javax.servlet.http.HttpServletRequest; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionMapping; public class NameForm extends ActionForm { private String name = null; private String last = null; private String email = null; public String getName() { return (name); } public String getLast() { return (last); } public String getEmail() { return (email); } public void setName(String name) { this.name = name; } public void setLast(String last) { this.last = last; } public void setEmail(String email) { this.email = email; } public void reset(ActionMapping mapping, HttpServletRequest request) { this.name = null; this.last= null; this.email=null; } } Enter the Java code in Notepad and save the file as NameForm.java. Compile the file from the command prompt and copy the class file in %TOMCAT_HOME%/webapps/details/WEB- INF/classes/example. 4 Ver 1.0 © 2005 Aptech Limited JSP and Struts package example; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; public class NameAction extends Action { public ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { String target = new String("success"); String name=null; String last=null; String email=null; if ( form != null ) { NameForm nameForm = (NameForm)form; NameForm lastForm = (NameForm)form; NameForm emailForm = (NameForm)form; name = nameForm.getName(); last = lastForm.getLast(); email = emailForm.getEmail(); } if ( name == null ) { target = new String("failure"); } else { request.setAttribute("NAME", name); request.setAttribute("LAST", last); request.setAttribute("EMAIL", email); } return (mapping.findForward(target)); } } Working with User Input Ver 1.0 © 2005 Aptech Limited 5 Enter the Java code in Notepad and save the file as NameAction.java. Compile the file from the command prompt and copy the class file in %TOMCAT_HOME%/webapps/details/WEB-INF/classes/example. <?xml version="1.0" encoding="ISO-8859-1" ?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts- config_1_1.dtd"> <struts-config> <! Form Bean Definitions > <form-beans> <form-bean name="nameForm" type="example.NameForm"/> </form-beans> <! Action Mapping Definitions > <action-mappings> <action path="/Name" type="example.NameAction" name="nameForm" input="/index.jsp"> <forward name="success" path="/displayname.jsp"/> <forward name="failure" path="/index.jsp"/> </action> </action-mappings> </struts-config> Update the struts-config.xml file used in the Web application. The output of the program is as shown in Figure 17.1. 6 Ver 1.0 © 2005 Aptech Limited JSP and Struts Figure 17.1: Accepting User Details The output of the program that displays user details is as shown in Figure 17.2. Figure 17.2: Details Page Do It Yourself 1. Consider the Part II question and add validation to the First Name, Last name, and Email address fields. Hint: Use validate method to validate the user details Working with User Input Ver 1.0 © 2005 Aptech Limited 7 Solution: The files used in this exercise are: 1. valid.jsp 2. savedOk.jsp 3. CustForm.java 4. CustAction.java <%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %> <html> <head> <title>Validations</title> </head> <body> <html:errors/> <html:form action="cust.do" > <b>First Name:</b> <html:text property="first" /> <br> <b>Last Name:</b> <html:text property="last" /> <br> <b>Email:</b> <html:text property="email" /> <br> <html:submit /> </html:form> </body> </html> Enter the code in Notepad and save the file as valid.jsp in %TOMCAT_HOME%/webapps/ details. <html> <head><title>Saved</title> </head> <body> <h3>Information is Saved</h3> </body> </html> Enter the code in Notepad and save the file as savedOk.jsp in %TOMCAT_HOME%/webapps/ details. package common; import javax.servlet.http.*; import org.apache.struts.action.*; public class CustForm extends ActionForm { private String mFirst= null; 8 Ver 1.0 © 2005 Aptech Limited JSP and Struts private String mLast= null; private String mEmail= null; public String getFirst() { return mFirst; } public void setFirst(String aFirst) { mFirst= aFirst; } public String getLast() { return mLast; } public void setLast(String aLast) { mLast= aLast; } public String getEmail() { return mEmail; } public void setEmail(String aEmail) { mEmail= aEmail; } public void reset(ActionMapping aMapping, HttpServletRequest aRequest) { mFirst= null; mLast= null; mEmail= null; } public ActionErrors validate(ActionMapping aMapping, HttpServletRequest aRequest) { ActionErrors err = new ActionErrors(); if ((mFirst==null) || (mFirst.length() <1) ) err.add("first", new ActionError("error.cust.first") ); if ((mLast==null) || (mLast.length()<1) ) err.add("last", new ActionError("error.cust.last") ); if ((mEmail==null) || (mEmail.length()<1) ) err.add("email", new ActionError("error.cust.email") ); Working with User Input Ver 1.0 © 2005 Aptech Limited 9 return err; } } Enter the Java code in Notepad and save the file as CustForm.java. Compile the file from the command prompt and copy the class file in %TOMCAT_HOME%/webapps/details/WEB- INF/classes/common. package common; import javax.servlet.*; import javax.servlet.http.*; import org.apache.struts.action.*; public class CustAction extends Action { public ActionForward perform(ActionMapping aMapping, ActionForm aForm, HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletException { CustForm f = (CustForm) aForm; String first = f.getFirst(); String last = f.getLast(); String email = f.getEmail(); return aMapping.findForward("saved"); } } Enter the Java code in Notepad and save the file as CustAction.java. Compile the file from the command prompt and copy the class file in %TOMCAT_HOME%/webapps/details/WEB-INF/classes/common. <?xml version="1.0" encoding="ISO-8859-1" ?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts- config_1_1.dtd"> <struts-config> <form-beans> <form-bean name="custForm" type="common.CustForm"/> </form-beans> <! Action Mapping Definitions > 10 Ver 1.0 © 2005 Aptech Limited JSP and Struts <action-mappings> <action path="/cust" type="common.CustAction" name="custForm" input="/valid.jsp"> <forward name="saved" path="/savedOk.jsp" /> </action> </action-mappings> <! end comment if struts1.0.x > <plug-in className="org.apache.struts.validator.ValidatorPlugIn"> <set-property property="pathnames" value="/WEB-INF/validator- rules.xml,/WEB-INF/validation.xml"/> </plug-in> </struts-config> Update the struts-config.xml file used in the Web application. # standard errors errors.header=<UL> errors.prefix=<LI> errors.suffix=</LI> errors.footer=</UL> # validator errors.invalid={0} is invalid. errors.maxlength={0} can not be greater than {1} characters. errors.minlength={0} can not be less than {1} characters. errors.range={0} is not in the range {1} through {2}. errors.required={0} is required. errors.byte={0} must be an byte. errors.date={0} is not a date. errors.double={0} must be an double. errors.float={0} must be an float. errors.integer={0} must be an integer. errors.long={0} must be an long. errors.short={0} must be an short. errors.creditcard={0} is not a valid credit card number. errors.email={0} is an invalid e-mail address. # other errors.cancel=Operation cancelled. errors.detail={0} errors.general=The process did not complete. Details should follow. errors.token=Request could not be completed. Operation is not in sequence. # welcome . <set-property property="pathnames" value=" /WEB- INF/validator- rules.xml, /WEB- INF/validation.xml"/> </plug-in> </struts-config> Update the struts-config.xml. in %TOMCAT_HOME%/webapps/details /WEB- INF/classes/common. <?xml version="1.0" encoding="ISO-885 9-1 " ?> <!DOCTYPE struts-config PUBLIC " ;-/ /Apache Software. %TOMCAT_HOME%/webapps/details /WEB- INF/classes/example. <?xml version="1.0" encoding="ISO-885 9-1 " ?> <!DOCTYPE struts-config PUBLIC " ;-/ /Apache Software
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