GG_CZY.java
package com.qbz.struts2_02;
import java.util.Map;
import java.util.UUID;
import org.apache.struts2.interceptor.RequestAware;
import org.apache.struts2.interceptor.SessionAware;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.util.ValueStack;
public class GG_CZY implements SessionAware,RequestAware{
//省略
......
......
public String save() {
if(this.id==null){
this.id = UUID.randomUUID().toString().replace("-", "");
}
//1.获取值栈
ValueStack stack = ActionContext.getContext().getValueStack();
//2.给新对象复制
GG_CZY czy = new GG_CZY(null,null,"王小二","放牛");
//3将新对象压入值栈中
stack.push(czy);
this.requestMap.put("reqTest", this);
this.sessionMap.put("sessTest", czy);
return "save";
}
private Map<String,Object> requestMap;
@Override
public void setRequest(Map<String, Object> arg0) {
this.requestMap = arg0;
}
private Map<String,Object> sessionMap;
@Override
public void setSession(Map<String, Object> arg0) {
this.sessionMap = arg0;
}
}
Show.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8" contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body>
<s:debug></s:debug>
ID:${id}<br>
编号:${ dlh}<br>
姓名:${ name}<br>
部门:${ bmmc}<br>
name:<%=request.getAttribute("name") %><br>
name:<s:property value="name"/><br>
name[0]:<s:property value="[0].name"/><br>
name[1]:<s:property value="[1].name"/><br>
requestTest:<s:property value="#request.reqTest.name"/><br>
sessionTest:<s:property value="#session.sessTest.name"/>
</body>
</html>
<constant name="struts.ognl.allowStaticMethodAccess" value="true"></constant>
Show.jsp
<s:property value="@java.lang.Math@abs(0)"/><br>
<s:property value="@java.lang.Math@PI"/><br>
刷新后效果:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8" contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body>
<s:debug></s:debug>
ID:${id}<br>
编号:${ dlh}<br>
姓名:${ name}<br>
部门:${ bmmc}<br>
name:<%=request.getAttribute("name") %><br>
name:<s:property value="name"/><br>
name[0]:<s:property value="[0].name"/><br>
name[1]:<s:property value="[1].name"/><br>
<s:property value="setName('哈哈哈哈')"/>
name:<s:property value="name"/><br>
requestTest:<s:property value="#request.reqTest.name"/><br>
sessionTest:<s:property value="#session.sessTest.name"/><br>
<s:property value="@java.lang.Math@abs(0)"/><br>
<s:property value="@java.lang.Math@PI"/><br>
</body>
</html>
<s:property value="setName('哈哈哈哈')"/>
执行了值栈中所有对象的所有setName(String str)方法。在action方法中初始化一个数组
private Map<String,Object> requestMap;
......
String [] str = new String[]{"aa","bb","cc","dd","ee"};
this.requestMap.put("str", str);
show.jsp
<s:property value="#attr.str.length"/><br>
<s:property value="#attr.str[2]"/>
效果显示: