JSP应用开发详解-VOTE程序-案例代码运行修复PATCH

JSP应用开发详解书中，投票程序，更换数据库环境为MySql，导致程序无法运行，先将修改patch提供如下：

数据库环境：MySql

运行效果：



修改代码patch：

diff --git a/WebContent/vote/a/vote.jsp b/WebContent/vote/a/vote.jsp
index cb0e684..8941a37 100644
--- a/WebContent/vote/a/vote.jsp
+++ b/WebContent/vote/a/vote.jsp
@@ -1,11 +1,11 @@
<%@ include file="../vote_include.inc"%>
<%@ page contentType="text/html; charset=utf-8" language="java" %>
-<c:set var="all" value="SELECT 曹操+孙权+刘备+诸葛亮+未确定 as a FROM vote"/>
-<c:set var="vote1" value="SELECT 曹操 as c  FROM vote"/>
-<c:set var="vote2" value="SELECT 孙权 as c  FROM vote"/>
-<c:set var="vote3" value="SELECT 刘备 as c  FROM vote"/>
-<c:set var="vote4" value="SELECT 诸葛亮 as c FROM vote"/>
-<c:set var="vote5" value="SELECT 未确定 as c FROM vote"/>
+<c:set var="all" value="SELECT IFNULL(曹操,0)+IFNULL(孙权,0)+IFNULL(刘备,0)+IFNULL(诸葛亮,0)+IFNULL(未确定,0) as a FROM vote"/>
+<c:set var="vote1" value="SELECT IFNULL(曹操,0) as c  FROM vote where id=1"/>
+<c:set var="vote2" value="SELECT IFNULL(孙权,0) as c  FROM vote where id=1"/>
+<c:set var="vote3" value="SELECT IFNULL(刘备,0) as c  FROM vote where id=1"/>
+<c:set var="vote4" value="SELECT IFNULL(诸葛亮,0) as c FROM vote "/>
+<c:set var="vote5" value="SELECT ifnull(未确定,0) as c FROM vote where id=1"/>

<sql:query sql="${all}" var="queryall" dataSource="${vote}"/>
<c:forEach var="row" items="${queryall.rows}">
@@ -24,7 +24,7 @@
<td width="83%" align="center">得票率</td>
</tr>
<tr>
-  <sql:query  var="query" dataSource="${vote}">
+  <sql:query sql = "${vote1}" var="query" dataSource="${vote}">
SELECT 曹操 as c  FROM vote
</sql:query>
<td><a href="vote_do.jsp?id=曹操">曹操 </a></td>
@@ -35,7 +35,7 @@
</td>
</tr>
<tr>
-     <sql:query  var="query" dataSource="${vote}">
+     <sql:query sql = "${vote4}" var="query" dataSource="${vote}">
SELECT 诸葛亮 as c  FROM vote
</sql:query>
<td><a href="vote_do.jsp?id=诸葛亮">诸葛亮</a></td>
@@ -46,7 +46,7 @@
</td>
</tr>
<tr>
-  <sql:query  var="query" dataSource="${vote}">
+  <sql:query sql = "${vote3}" var="query" dataSource="${vote}">
SELECT 刘备 as c  FROM vote
</sql:query>
<td><a href="vote_do.jsp?id=刘备">刘备</a></td>
@@ -57,7 +57,7 @@
</td>
</tr>
<tr>
-  <sql:query  var="query" dataSource="${vote}">
+  <sql:query sql = "${vote2}" var="query" dataSource="${vote}">
SELECT 孙权 as c  FROM vote
</sql:query>
<td><a href="vote_do.jsp?id=孙权">孙权</a></td>
@@ -68,7 +68,7 @@
</td>
</tr>
<tr>
-  <sql:query  var="query" dataSource="${vote}">
+  <sql:query sql = "${vote5}" var="query" dataSource="${vote}">
SELECT 未确定 as c  FROM vote
</sql:query>
<td><a href="vote_do.jsp?id=未确定">未确定</a></td>

代码下载：http://download.csdn.net/download/hailushijie/9874752

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