In this section, we will introduce you how to access beans properties from request object using OGNL expression language.
1-index.jsp
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<%@page language="java" session="true" pageEncoding="ISO-8859-1"%> <%@taglib uri="/struts-tags" prefix="s"%> <html> <head><title>Example_OGNL_Struts2</title></head> <body ><h1></h1><table><tr> <td align="center" valign="top" bgcolor="#CCCCFF"> <br>Select Student Name and Age.... <s:actionerror/> <s:form action="ognlAction"> <s:select list="{'Bharat','Gyan','Ankit','Vinay'}" label="Name" headerKey="none" headerValue="None" name="studentname"/> <s:textfield label="Age" name="age"></s:textfield> <s:submit></s:submit> </s:form> </td> <td align="center" valign="top"> |Accessing Bean Properties | <table cellpadding="2" cellspacing="0" width="200"> <tr bgcolor="#CC66FF"> <td>Student name</td> <td>Age</td></tr><tr> <td><s:property value="studentname"/></td> <td><s:property value="age"/></td></tr></table> </td> <td align="center" valign="top"> |Accessing Request | <table cellpadding="2" cellspacing="0" width="200"> <tr bgcolor="#CC66FF"> <td>Student Name</td> <td>Age</td></tr><tr> <td><s:property value="#request['bean'].studentname"/></td> <td><s:property value="#request['bean'].age"/> </td></tr></table></td> </tr> </table> </body> </html> |
3_ OGNLOnsession.java (Action class)
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package roseindia.action; import javax.servlet.http.HttpServletRequest; import org.apache.struts2.interceptor.ServletRequestAware; import roseindia.model.StudentDetails; import com.opensymphony.xwork2.ActionSupport; public class OGNLAction extends ActionSupport implements ServletRequestAware { private HttpServletRequest request; private String studentname; private int age; public String getStudentname() { return studentname; } public void setStudentname(String studentname) { this.studentname = studentname; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public void setServletRequest(HttpServletRequest request) { this.request = request; } public HttpServletRequest getServletRequest() { return request; } public String execute() throws Exception { if (studentname.equals("none")) { this.addActionError("Please Select name..."); return ERROR; } StudentDetails bean = new StudentDetails(); bean.setStudentname(studentname); bean.setAge(age); request.setAttribute("bean", bean); return SUCCESS; } } |
4_ EmployeeBean.java (Bean class)
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package roseindia.model; public class StudentDetails { private String studentname; private int age; public String getStudentname() { return studentname; } public void setStudentname(String studentname) { this.studentname = studentname; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } } |
5_ struts.xml
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<struts> <constant name="struts.devMode" value="false" /> <package name="roseindia" extends="struts-default"> <action name="ognlAction" class="roseindia.action.OGNLAction"> <result name="error">index.jsp</result> <result name="success">index.jsp</result> <result name="input">index.jsp</result> </action> </package></struts> |
Output
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