Jsp IfÌõ¼þÅжÏÎÊÌâ. - Java / Web ¿ª·¢
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tomcat+struts 2.0
jsp Ò³ÃæÖ±½Ó¹ØÁªmodel
ÏÖÔÚÐèÒª¸ù¾Ýmodel(admin)ÀïÃæµÄÒ»¸öitem(id),ÅжÏjspÒ³Ãæ³öÏÖµÄÄÚÈÝ.
´ó¸ÅÁ÷³Ì:
...
<table>
<tr>
<td>
<s:if admin.id is null> ---Õâ¸öµØ·½²»ÖªµÀÔõôд , admin.idÊÇStringÀàÐÍ
<s:text name="admin.name"></s:text>
</s:if>
<s:else>
<s:text name="admin.title"></s:text>
</s:else>
</td>
</tr>
</table>
...
<s:if test="#admin.name == null">
4. <s:if test="#request.admin.id == null">
ллlsÁ½Î»µÄ»Ø¸´.¾¹ý²âÊÔ.
1. <s:if test="admin.id == null">
2. <s:if test="%{admin.id == null}">
3. <s:if test="%{#request.admin.id == null}">
4. <s:if test="#request.admin.id == null">
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Java code:
1. <s:if test="admin.id == null">
2. <s:if test="%{admin.id == null}">
3. <s:if test="%{#request.admin.id == null}">
4. <s:if test="#request.admin.id == null">
Ïà¹ØÎÊ´ð£º
import java.sql.Connection;
import java.sql.Date;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class QueryTest&n ......
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ÄãÔõô² ......
private static final String URL = "jdbc:oracle:thin:@localhost:1521:orcl";
private static final String USERNAME = "sys";
private static final String PASSWORD = "s ......
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<html><head><title>[@title]</title>
<meta http-equiv=Content-Type content="text/html; charset=gb2312">
<script language='javascript'>
function diyCheck ......