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action这个类里面，要有表单上对应的属性
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;
}
}
index.jsp
<%@page language="java" session="true" pageEncoding="ISO-8859-1"%>
<%@taglib uri="/struts-tags" prefix="s"%>
<html>
<head>
<title>Example_OGNL_Struts2</title>
</head>
<body>
<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>
<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>
原文：http://www.roseindia.net/struts/struts/struts2.2.1/tags/requestValue.html
源代码：http://pan.baidu.com/share/link?shareid=252734836&uk=3878681452
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