struts.xml

<struts>
	<package?name="default"?namespace="/"?extends="struts-default"?strict-method-invocation="false">	
	<global-allowed-methods>regex:.*</global-allowed-methods>	
	</package>	
	<package?name="users"?namespace="/users"?extends="default">	
		<action?name="*_*"?class="action.{1}Action"?method="{2}">		
			<result?name="login_success">/users/Users_login_success.jsp</result>	
			<result?name="login_failure">/users/Users_login.jsp</result>		
			<result?name="logout_success">/users/Users_login.jsp</result>	
			<result?name="input">/users/Users_login.jsp</result>	
		</action>
				
	</package>
	<package?name="students"?namespace="/students"??extends="default">	
		<action?name="*_*"?class="action.{1}Action"?method="{2}">	
			<result?name="query_success">/students/Students_query_success.jsp</result>	
			<result?name="delete_success"?type="chain">Students_query</result>
			<result?name="add_success">/students/Students_add_success.jsp</result>	
			<result?name="modify_success">/students/Students_modify.jsp</result>
			
		</action>	
	</package>
</struts>

action

//?修改學生信息	
public?String?modify()??{	
	//?獲得傳過來的學生id	
		String?sid?=?request.getParameter("sid");
		StudentsDAO?sdao?=?new?StudentsDAOimpl();	
		Students?s?=?sdao.queryStudentsBySid(sid);		
		//?保存在session中		
		session.setAttribute("modify_students",?s);
		//String?address?=?request.getParameter("address");
		//String?sname?=?request.getParameter("sname");
		//String?gender?=?request.getParameter("gender");
		//String?birthday?=?request.getParameter("birthday");
		//SimpleDateFormat?sdf?=?new?SimpleDateFormat("yyyy-MM-dd");
		////		Students?s?=?new?Students();
		//		s.setSid(sid);
		//		s.setBirthday(sdf.parse(birthday));
		//		s.setAddress(address);
		//		s.setSname(sname);
		//		s.setGender(gender);		
		return?"modify_succcess";	
		}

modify.jsp

<div?id="mainContainer">
<!--?從session中獲取學生集合?-->
<strong>修改學生資料</strong>
<br>
<br>
<form?name="modifyForm"?action="<%=path%>/students/Students_modify.action"?method="post">
<table?width="400"?>?
?<tr>????
?<td?width="30%">學號：</td>???
??<td><input?type="text"?name="sid"?value='<s:property?value="#session.modify_students.sid"/>'??readonly="readonly"/></td>??</tr>??<tr>????<td?width="30%">姓名：</td>??
??<td><input?type="text"?name="sname"?value='<s:property?value="#session.modify_students.sname"/>'/></td>?
???</tr>?
????<tr>??
??????<td>性別：</td>?
???????<td>???<s:if?test='%{#session.modify_students.gender=="男"}'>?
????<input?type="radio"?name="gender"?value="男"?checked="checked"/>男????
?????????<input?type="radio"?name="gender"?value="女"/>女??</s:if>?
????<s:else>??<input?type="radio"?name="gender"?value="男"?/>男???????
??????<input?type="radio"?name="gender"?value="女"?checked="checked"/>女?????
?????</s:else>???
???????</td>?
????????</tr>??
??????<tr>?
?????????<td>出生日期：</td>??
??????????<td><input?name="birthday"?type="text"?id="control_date"?size="20"??maxlength="10"?onclick="new?Calendar().show(this);"?readonly="readonly"?value="<s:date?name="#session.modify_students.birthday"?format="yyyy-MM-dd"/>"??????/>??
????????????</td>??</tr>??<tr>????<td>地址：</td>????<td><input?type="text"?name="address"?value='<s:property?value="#session.modify_students.address"/>'/></td>??</tr>
?????????????<tr>????
?????????????<td?colspan="2"?align="center">
?????????????<input?class="button"?type="submit"?value="修改"></td>??
?????????????</tr>
?????????????</table>
?????????????</form>
?????????????</div>