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Introduction to Struts MVC Framework
- 1. STRUTS Part of the Jakarta Project Sponsored by the Apache Software Foundation Developed by: Roger W Barnes of Project Refinery, Inc. Introduction to Struts
- 4. Model-View-Controller Design Pattern Unit 1
- 6. STRUTS MVC Design Pattern
- 19. View Components Unit 3
- 46. Tag Libraries Unit 5
- 50. HTML Tags – Typical HTML Form <HTML> <BODY> <FORM> <TABLE WIDTH="100%"> <TR><TD>First Name</TD> <TD><INPUT TYPE="TEXT" NAME="Name" SIZE="40" MAXLENGTH="40"></TD></TR> <TR><TD>Street Address</TD> <TD><INPUT TYPE="TEXT" NAME="Address" SIZE="40" MAXLENGTH="40"></TD></TR> <TR><TD>City</TD> <TD><INPUT TYPE="TEXT" NAME="City" SIZE="20" MAXLENGTH="20"></TD></TR> <TR><TD>State</TD> <TD><INPUT TYPE="TEXT" NAME="State" SIZE="2" MAXLENGTH="2"></TD></TR> <TR><TD>Postal Code</TD> <TD><INPUT TYPE="TEXT" NAME="ZipCode" SIZE="9" MAXLENGTH="9"></TD></TR> <TR><TD ALIGN=CENTER><INPUT TYPE="SUBMIT" NAME="Submit" VALUE="Save"></TD> <TD><INPUT TYPE="RESET" NAME="Reset" VALUE="Cancel"></TD></TR> </TABLE> </FORM> </BODY> </HTML>
- 51. HTML Tags – Typical Struts Form <HTML:HTML> <BODY> <HTML:FORM Action="/CustomerForm" focus=“name” > <TABLE WIDTH="100%"> <TR><TD><bean:message key="customer.name"/></TD> <TD><HTML:TEXT property="name" size="40" maxlength="40" /></TD></TR> <TR><TD><bean:message key="customer.address"/></TD> <TD><HTML:TEXT property="address" size ="40" maxlength ="40" /></TD></TR> <TR><TD><bean:message key="customer.city"/></TD> <TD><HTML:TEXT property="city" size ="20" maxlength ="20" /></TD></TR> <TR><TD><bean:message key="customer.state"/></TD> <TD><HTML:TEXT property="state" size ="2" maxlength ="2" /></TD></TR> <TR><TD><bean:message key="customer.zip"/></TD> <TD><HTML:TEXT property="zip" size ="9" maxlength ="9" /></TD></TR> <TR><TD ALIGN=CENTER><html:submit property="action" value ="Save"/></TD> <TD><html:reset property="action" value ="Reset"/></TD></TR> </TABLE> </HTML:FORM> </BODY> </HTML:HTML>
- 53. Bean Tags Tag Name Description cookie Define a scripting variable based on the value(s) of the specified request cookie. define Define a scripting variable based on the value(s) of the specified bean property. header Define a scripting variable based on the value(s) of the specified request header. include Load the response from a dynamic application request and make it available as a bean. message Render an internationalized message string to the response. page Expose a specified item from the page context as a bean. parameter Define a scripting variable based on the value(s) of the specified request parameter. resource Load a web application resource and make it available as a bean. size Define a bean containing the number of elements in a Collection or Map. struts Expose a named Struts internal configuration object as a bean. write Render the value of the specified bean property to the current JspWriter.
- 54. Bean Tag Example <table border="2"> <tr> <th align="left"><bean:message key=“imagebroker.lob”/></th> <th align="left"><bean:message key=“imagebroker.unitnbr”/></th> <th align="left"><bean:message key=“imagebroker.onbase_dns”/></th> </tr> <logic:iterate id="image" property="collection" name="ImageLocationListForm"> <tr> <td><a href="ImageLocationListForm.do?lob=<bean:write name='image' property='lob'/> &unitnbr=<bean:write name='image' property='unitnbr'/> &onbase_dns=<bean:write name='image' property='onbase_dns'/>" > <bean:write name="image" property="lob"/></a></td> <td><bean:write name="image" property="unitnbr"/></td> <td><bean:write name="image" property="onbase_dns"/></td> </tr> </logic:iterate> </table>
- 58. Logic Tags Tag Name Description empty Evaluate the nested body content of this tag if the requested variable is either null or an empty string. equal Evaluate the nested body content of this tag if the requested variable is equal to the specified value. forward Forward control to the page specified by the specified ActionForward entry. greaterEqual Evaluate the nested body content of this tag if requested variable is greater than or equal to specified value. greaterThan Evaluate the nested body content of this tag if the requested variable is greater than the specified value. iterate Repeat the nested body content of this tag over a specified collection. lessEqual Evaluate the nested body content of this tag if requested variable is greater than or equal to specified value. lessThan Evaluate the nested body content of this tag if the requested variable is less than the specified value. match Evaluate the nested body content of this tag if specified value is an appropriate substring of requested variable. messagesNotPresent Generate the nested body content of this tag if the specified message is not present in this request. messagesPresent Generate the nested body content of this tag if the specified message is present in this request. notEmpty Evaluate the nested body content of this tag if the requested variable is neither null nor an empty string. notEqual Evaluate the nested body content of this tag if the requested variable is not equal to the specified value. notMatch Evaluate the nested body content of tag if specified value not an appropriate substring of requested variable. notPresent Generate the nested body content of this tag if the specified value is not present in this request. present Generate the nested body content of this tag if the specified value is present in this request. redirect Render an HTTP Redirect
- 59. Logic Tags - Example <html:html> <head> <title><bean:message key="imagebrokerlink.title"/></title> <META name="GENERATOR" content="IBM WebSphere Studio"> </head> <body> <html:form action="/ImageLocationForm" > <center> <font size=3> <br> <b> <logic:notEqual property="action" name="ImageLocationForm" value="Insert"> <bean:message key="imagelocationdetail.title"/> </logic:notEqual> <logic:equal property="action" name="ImageLocationForm" value="Insert"> <bean:message key="imagelocationinsert.title"/> </logic:equal> … …
- 62. Custom Tags <%@ taglib uri="WEB-INF/imagebroker.tld" prefix="broker" %> <table width=750 cellspacing=0 cellpadding=2 border=2 > <tr> <td><broker:form lob='<%=test.getLob()%>' unitnbr='<%=test.getUnitnbr()%>' userid='<%=test.getUserid()%>' > <broker:doctype value="Invoice"/> <broker:keyword name="CompanyNbr" value="55555"/> <broker:keyword name="PONbr" value="M12345"/> <broker:constraint name="FromDate" value="02/02/2002"/> <broker:constraint name="ToDate" value="02/28/2002"/> Image Broker Link Test </broker:form> </td> </tr> </table>
- 63. Custom Tags – tld File <tag> <name>doctype</name> <tagclass>com.pri.brokertag.ImageBrokerDoctype</tagclass> <attribute> <name>value</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> </tag>
- 64. Custom Tags – Tag Class public class ImageBrokerDoctype extends TagSupport { private String value = null; public int doStartTag() throws JspException { Hashtable ht = null; String keyword_count = null; int iCnt = 0; HttpServletRequest request = (HttpServletRequest) pageContext.getRequest(); ht = (Hashtable) request.getAttribute("keyword_parms"); keyword_count = (String) request.getAttribute("queryobject_count"); iCnt ++; ht.put("QueryObject" + iCnt, value); request.setAttribute("keyword_parms", ht); request.setAttribute("queryobject_count", new String(new Integer(iCnt).toString())); return EVAL_PAGE; } }
- 65. STRUTS Configuration File Unit 6
- 68. Struts-config.xml <?xml version="1.0" encoding="ISO-8859-1" ?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.0//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_0.dtd"> <struts-config> <!-- ========== Form Bean Definitions =================================== --> <form-beans> <form-bean name="CryptForm" type="com.pri.imagebrokerWeb.CryptForm" /> </form-beans> <!-- ========== Global Forward Definitions ============================== --> <global-forwards> <forward name="start" path="/index.html"/> </global-forwards> <!-- ========== Action Mapping Definitions ============================== --> <action-mappings> <action path="/CryptForm" type="com.pri.imagebrokerWeb.CryptAction" name="CryptForm" scope="request" input="/pgCrypt.jsp"> <forward name="encrypt" path="/pgCryptDisplay.jsp"/> </action> </action-mappings> </struts-config>
- 69. Web Application Descriptor File Unit 7
- 71. Web.xml File <?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd"> <web-app id="WebApp"> <display-name>imagebrokerWeb</display-name> <!-- Action Servlet Configuration --> <servlet id="Servlet_1"> <servlet-name>action</servlet-name> <servlet-class>org.apache.struts.action.ActionServlet</servlet-class> <init-param> <param-name>application</param-name><param-value>imagebrokerWeb</param-value> </init-param> <init-param> <param-name>config</param-name><param-value>WEB-INF/struts-config.xml</param-value> </init-param> </servlet>
- 72. Web.xml File - continued <!-- Action Servlet Mapping --> <servlet-mapping> <servlet-name>action</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <!-- The Welcome File List --> <welcome-file-list> <welcome-file>index.html</welcome-file> </welcome-file-list>
- 73. Web.xml File - continued <!-- Struts Tag Library Descriptors --> <taglib> <taglib-uri>WEB-INF/struts-bean.tld</taglib-uri> <taglib-location>/WEB-INF/struts-bean.tld</taglib-location> </taglib> <taglib> <taglib-uri>WEB-INF/struts-html.tld</taglib-uri> <taglib-location>/WEB-INF/struts-html.tld</taglib-location> </taglib> <taglib> <taglib-uri>WEB-INF/struts-logic.tld</taglib-uri> <taglib-location>/WEB-INF/struts-logic.tld</taglib-location> </taglib> </web-app>
- 74. Application Resources File Unit 8
- 75. Application.properties File error.cryptvalue.required=<li>You must enter some text.</li> error.lob.required=<li>You must enter the Line of Business.</li> error.unitnbr.required=<li>You must enter the Unit Number.</li> error.onbase_dns.required=<li>You must enter the OnBase DNS.</li> imagebroker.linkname=Project Refinery, Inc. imagebroker.title=pri Image Broker imagebrokerlink.title=pri Image Broker Link Test imagelocationlist.title=Image Location List imagelocationdetail.title=Image Location Detail imagelocationinsert.title=Image Location Insert errors.header= errors.footer=
- 76. Resources Unit 9