Posted on: January 24, 2011 at 12:00 AM
How to access session value using OGNL.
In this example, you will see how to access value of session using OGNL expression language in struts2.
1-index.jsp
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<html> <head> <title>Access_Value_bean_from_session_OGNL</title> </head> <body> <a href="sessionOGNL">Access_Value_bean_from_session_OGNL</a> </body> </html> |
2_ sessionValue.jsp
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<%@page language="java" pageEncoding="ISO-8859-1"%> <%@taglib uri="/struts-tags" prefix="s" %> <html> <head><title>Access_Value_of_bean_from_session_OGNL</title> </head> <body><h1>Access_Value_of_bean_from_session_OGNL</h1><hr/> <table bgcolor="#CC99FF"> <tr><td>Please enter the Name and Profile.... <DIV style="color:pink;"><s:actionerror/></DIV> <s:form action="setbeanInsession"> <s:select label="Language" headerKey="none" name="lang" headerValue="Select Language" list="langName"></s:select> <s:textfield name="empName" label="Employee Name"></s:textfield> <s:submit></s:submit></s:form> </td> </tr></table> </body> </html> |
3_ OGNLOnsession.java (Action class)
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package roseindia.action; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; import java.util.ArrayList; import java.util.List; import java.util.Map; import roseindia.model.EmployeeBean; public class OGNLOnsessionObject extends ActionSupport { private static final long serialVersionUID = 1L; private List langName; private String lang; private String empName; ActionContext context = ActionContext.getContext(); Map session = context.getSession(); public String getLang() { return lang; } public void setLang(String lang) { this.lang = lang; } public String getEmpName() { return empName; } public void setEmpName(String empName) { this.empName = empName; } public List getLangName() { return langName; } public void setLangName(List langName) { this.langName = langName; } public OGNLOnsessionObject() { langName = new ArrayList(); langName.add("C"); langName.add("c++"); langName.add("JAVA"); langName.add("PHP"); } public String show() { return INPUT; } public String execute() { if (lang.equals("none")) { this.addActionError("Please select any language."); return ERROR; } ArrayList beans = null; EmployeeBean bean = new EmployeeBean(); bean.setEmpName(empName); bean.setLang(lang); beans = (ArrayList) session.get("beans"); if (beans == null) beans = new ArrayList(); beans.add(bean); session.put("beans", beans); return SUCCESS; } } |
4_ EmployeeBean.java (Bean class)
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package roseindia.model; public class EmployeeBean { private String lang; private String empName; public String getLang() { return lang; } public void setLang(String lang) { this.lang = lang; } public String getEmpName() { return empName; } public void setEmpName(String empName) { this.empName = empName; } } |
5_ struts.xml
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<struts> <constant name="struts.devMode" value="false" /> <package name="roseindia" extends="struts-default"> <action
name="sessionOGNL"
class= "roseindia.action.OGNLOnsessionObject"> <result name="error">sessionValue.jsp</result> <result name="success">DisplayBeanPropertyValue.jsp</result> </action> </package> </struts> |
6_ DisplayBeanPropertyValue.jsp
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<%@ page language="java" pageEncoding="ISO-8859-1"%> <%@taglib uri="/struts-tags" prefix="s" %> <html> <head> <title>Access_Value_of_bean_from_session_OGNL</title> </head> <body><h1>Access_Value_of_bean_from_session_OGNL</h1><hr> <b style="color: purple;">|Access session |</b> <table cellpadding="10" cellspacing="0"> <tr bgcolor="#CC99FF"> <td >Employee</td> <td>Language</td> </tr> <s:iterator id="beans" value="#session['beans']"> <tr> <td><s:property value="empName"/></td> <td><s:property value="lang"/></td> </tr> </s:iterator> </table> </body> </html> |
Output
