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struts2中用session進行後臺向前臺傳值!

JSP頁面程式碼

<td align="right"><label for="xm1">姓名:</label></td> 			
				 <td>  <s:textfield name="xm"  value="%{#session.xm}"></s:textfield></td>
				 <td align="right"><label for=dh1">電話:</label></td>
				<td> <s:textfield name="dh"  value="%{#session.dh}"></s:textfield></td>	</tr>
			<tr>
				<td align="right"><label for="yhm1">使用者名稱:</label></td>
				<td> <s:textfield name="ac"  value="%{#session.ac}"></s:textfield></td>
				<td align="right"><label for="mm1">密碼:</label></td>
				<td> <s:textfield name="mm" value="%{#session.mm}" ></s:textfield>
				<s:hidden name="id" value="%{#session.id}"></s:hidden></td>
				<td align="right"><label for="yhm1">許可權:</label></td>
				<td>
				<s:select  name="lx"  theme="simple" list="#{0:'管理員',1:'輔導員'}"  listKey="key" listValue="value" value="%{#session.lx}" > 
					</s:select>
					</td>

ACTION中的主要程式碼
private Map<String, String>session;
public String execute() throws Exception
	{
		account = new Account();
		account = (Account) userModualService.accountQueryById(id);
		 session.put("xm", account.getXm());
		 session.put("dh", account.getDh());
		 session.put("mm", account.getMm());
		 session.put("ac", account.getAc());
		 session.put("xs", String.valueOf(account.getXs()));
		 session.put("id", String.valueOf(account.getId()));
		if(account.getLx().equals("管理員"))
		{
			 session.put("lx", "0");
		}
 else
		{
	 session.put("lx", "1");
		}
		
		return SUCCESS;
	}

	public void setSession(Map session)
	{
		this.session=session;
	}