Retrofitting
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Lets stir some Ajax wizardry into a conventional Struts application, without all the sweat and bother of writing our own JavaScript. Struts 1 and Struts 2 both support Ajax taglibs that look and feel just like ordinary JSP tags. If it's just a little bit of Ajax that you want, these tags will get you around the learning curve in record time.
![[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Struts on Ajax: Retrofitting Struts with Ajax Taglibs Tuesday, September 30th, 9a-10a Ted Husted](https://image.slidesharecdn.com/retrofitting-1218975475681649-9/85/Retrofitting-1-320.jpg)
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Retrofitting
- 2. Struts on Ajax: Retrofitting Struts with Ajax Taglibs Square One University Series
- 12. public class IndexResult extends Action { public ActionForward execute( ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { response.setContentType( "text/html" ); PrintWriter out = response.getWriter(); out.println( "Hello World! “ + “ This is an AJAX response “ + “ from a Struts Action." ); out.flush(); return null ; } } actions.IndexResult.java
- 13. public class IndexResult2 extends ActionSupport { private InputStream inputStream ; public InputStream getInputStream() { return inputStream ; } public String execute() throws Exception { inputStream = new StringBufferInputStream( "Hello World! This is an AJAX response " + "from a Struts 2 Action." ); return SUCCESS ; } } actions.IndexResult2.java
- 32. < html > < head > < title > Simple Hello World Example </ title > </ head > < body > < input id = "hello-button" type = "button" value = "Say Hello World via AJAX" /> < br />< br /> < div id = "hello-div" ></ div > </ body > </ html > index.jsp
- 33. <%@ taglib prefix = "ajax" uri = "javawebparts/ajaxparts/taglib" %> < html > < head > < title > Simple Hello World Example </ title > </ head > < body > < input id = "hello-button" type = "button" value = "Say Hello World via AJAX" /> < ajax:event attachTo = "hello-button" ajaxRef = "index/hello-button" /> < br />< br /> < div id = "hello-div" ></ div > < ajax:enable /> </ body > </ html > index.jsp
- 34. ajax-config.xml < ajaxConfig > < group ajaxRef = "index" > < element ajaxRef = "hello-button" > < event type = "onclick" > < requestHandler type = "std:SimpleRequest" target = " index-result.txt " > < parameter /> </ requestHandler > < responseHandler type = "std:InnerHTML" > < parameter > hello-div </ parameter > </ responseHandler > </ event > </ element > </ group > </ ajaxConfig >
- 35. Hello World! I am an AJAX result from the (mock) server. index-result.txt
- 36. <web-app> <context-param> <param-name> AjaxPartsTaglibConfig </param-name> <param-value> /WEB-INF/ajax-config.xml </param-value> </context-param> <context-param> <param-name> AjaxPartsTaglibValidateConfig </param-name> <param-value> false </param-value> </context-param> web.xml
- 41. public class IndexResult extends Action { public ActionForward execute( ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { response.setContentType( "text/html" ); PrintWriter out = response.getWriter(); out.println( "Hello World! “ + “ This is an AJAX response “ + “ from a Struts Action." ); out.flush(); return null ; } } actions.IndexResult.java
- 42. < action path = "/index-result" type = "actions.IndexResult" validate = "false" /> struts-config.xml
- 43. <requestHandler type="std:SimpleRequest" target="index-result.txt"> < requestHandler type = "std:SimpleRequest" target = "/index-result.do" > ajax-config.xml
- 46. public class IndexResult2 extends ActionSupport { private InputStream inputStream ; public InputStream getInputStream() { return inputStream ; } public String execute() throws Exception { inputStream = new StringBufferInputStream( "Hello World! This is an AJAX response " + "from a Struts 2 Action." ); return SUCCESS ; } } actions.IndexResult2.java
- 47. < package name = "ajaxwebparts" extends = "struts-default" > < action name = "index-result" class = "actions.IndexResult2" > < result type = "stream" > < param name = "contentType" > text/html </ param > < param name = "inputName" > inputStream </ param > </ result > </ action > </ package > struts.xml
- 48. <requestHandler type="std:SimpleRequest" target="/index-result.do"> < requestHandler type = "std:SimpleRequest" target = "/index-result.action" > ajax-config.xml
- 53. < ajaxConfig > < group ajaxRef = " index " > < element ajaxRef = " hello-button " > < event type = "onclick" > < requestHandler type = "std:SimpleRequest" target = " index-result.action " > < parameter /> How does AjaxParts work? <body> < input id = "hello-button" type = "button" value = "Say Hello World via AJAX" /> < ajax:event attachTo = "hello-button“ ajaxRef = " index/hello-button " />
- 54. < responseHandler type = "std:InnerHTML" > < parameter > hello-div </ parameter > </ responseHandler > < br />< br /> < div id = " hello-div " ></ div > </ body > < ajax:enable /> How does AjaxParts work?
- 76. <%@ taglib prefix = "yui" uri = "/struts-yui-tags" %> <%@ taglib prefix = "s" uri = "/struts-tags" %> < html > < head > < yui:head datepicker = "true" /> </ head > < body > < p > The selected date is < s:property value = "datepicker" /></ p > < s:form action = "datepicker" > < yui:datepicker id = "datepicker" name = "datepicker" /> < s:submit /> </ s:form > </ body > </ html > datepicker.jsp
- 77. < action name = "datepicker" class = "actions.Datepicker" > < result > datepicker.jsp </ result > </ action > struts.xml
- 78. public class Datepicker extends ActionSupport { private Date datepicker ; public Date getDatepicker() { return datepicker ; } public void setDatepicker(Date value) { datepicker = value; } } actions.DatePicker.java