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有关mysql文章教程,本人收集的一些有关mysql文章教程

<tr><td>等级：<img border=0 src='images/small/icon_user.gif' align=absmiddle class=fr>&nbsp;Java初中<br>贴子：62<br>积分：60<br>Matrix币：0<br>注册：2004-7-29</td></tr>
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</td><td width='15%' align=center>第 <font class=red_3><b>1</b></font> 楼</td></tr>
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<img src='images/icon/0.gif' align=absMiddle border=0>&nbsp;<font class=red_3><b>Hibernate中用什么类型存储大量字符?</b></font></td></tr>
<tr><td class=bw><font class=htd>rt<BR> <BR> 用TextType吗?我现在尝试用这个,不过出现点问题.<BR> <BR> <table border=1 bgcolor='e6e6e6' cellspacing=0 cellpadding=4 width='98%' bordercolorlight=#009ace bordercolordark=#FFFFFF bgcolor=#FFFFFF style="TABLE-LAYOUT: fixed" align=center><tr><td style="WORD-WRAP: break-word">Strng&nbsp;s=&quot;asdas&quot;;<BR> TextType&nbsp;t1=new&nbsp;TextType();<BR> System.out.println(t1.fromString&#118alue(s));//可以显示&quot;asdas&quot;<BR> TextType&nbsp;t2=(TextType)t1.fromString&#118alue(s);//这里提示不可转换.java.lang.ClassCastException<BR> </td></tr></table><br><BR> t1.fromString&#118alue(s)返回Object对象,怎么不能转换成TextType?<BR> <BR> 哪位朋友知道怎么解决吗?<image src='images/icon/emb6.gif' border=0>&nbsp;<BR> 谢谢!</font></td></tr>
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<tr><td colspan=2 height=30 align=center valign=top><table border=0 width='96%' class=tf><tr><td class=bw><font class=htd>Chang&nbsp;the&nbsp;World&nbsp;or&nbsp;the&nbsp;Way&nbsp;it&nbsp;&nbsp;Thinks.<br>Think&nbsp;Different.</font></a></br><script type='text/javascript'><!--
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<tr><td height=25 colspan=2><table border=0 width='100%'><tr><td><img border=0 src='images/small/forum_tim.gif' align=absmiddle class=fr>&nbsp;<font class=gray>本贴发表时间：2005-3-28 19:45:00</font></td><td align=right><img src='images/small/ip.gif' align=absMiddle title='dakun 的IP是：*.*.*.*' border=0>　<img src='images/small/sys.gif' align=absMiddle title='操作系统：Windows XP ，浏览器：Internet Explorer 6.0' border=0>　<a href="javascript:forum_do_delete('23','17906');"><img src='images/small/forum_del.gif' align=absMiddle border=0></a></td></tr></table></td></tr>
<tr><td></br><a href=http://www.matrix.org.cn/article/1259.html target=_blank><font class=red>Java文栏:(hibernate)inverse,cascade详细分析（用例说明）</font></a></td></tr></table>
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<table border=0 width='94%'><tr><td align=center height=30><table border=0><tr><td><font class=blue><b>wenic705</b></font></td><td>&nbsp;<img src='images/small/forum_boy.gif' align=absmiddle title='阳光男孩' border=0></td></tr></table></td></tr>
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<tr><td>等级：<img border=0 src='images/small/icon_super.gif' align=absmiddle class=fr>&nbsp;论坛版主<br>头衔：民&nbsp;&nbsp;工<br>贴子：1636<br>积分：1092<br>Matrix币：45<br>来自：湖南<br>注册：2003-9-21</td></tr>
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</td><td width='15%' align=center>第 <font class=red_3><b>2</b></font> 楼</td></tr>
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<tr><td class=bw><font class=htd>String&nbsp;,blob,clob,byte[]&nbsp;主要看数据库。</font></td></tr>
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<tr><td colspan=2 height=30 align=center valign=top><table border=0 width='96%' class=tf><tr><td class=bw><font class=htd><b><font color=blue><br>生活指南：<br>不能改变出生，可以改变命运；<br>不能改变别人，可以改变环境。<br></font></b><br><b><font color=red>纯情打造:</font></b><b><font color=yellow><A HREF='/blog/wenic705' TARGET=_blank>wenic705&quot;s&nbsp;Blog</A></font></b><br><br><b><font color=green>程序人生感悟：<br>多看文档，多思考，自己解决问题。<br>多写代码，多锻炼，程序不费力气。</font></b></font></a></br> </td></tr></table></td></tr>
<tr><td height=25 colspan=2><table border=0 width='100%'><tr><td><img border=0 src='images/small/forum_tim.gif' align=absmiddle class=fr>&nbsp;<font class=gray>本贴发表时间：2005-3-29 9:03:00</font></td><td align=right><img src='images/small/ip.gif' align=absMiddle title='wenic705 的IP是：*.*.*.*' border=0>　<img src='images/small/sys.gif' align=absMiddle title='操作系统：Windows ，浏览器：Netscape5.0' border=0>　<a href="javascript:forum_do_del('23','87553');"><img src='images/small/forum_del.gif' align=absMiddle border=0></a></td></tr></table></td></tr>
<tr><td></br><a href=http://www.matrix.org.cn/article/1234.html target=_blank><font class=red>Java文栏:利用 Jsp+Taglib+JavaBean 快速构建 动态数据库查询模板</font></a></td></tr></table>
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<table border=0 width='94%'><tr><td align=center height=30><table border=0><tr><td><font class=blue><b>dakun</b></font></td><td>&nbsp;<img src='images/small/forum_boy.gif' align=absmiddle title='阳光男孩' border=0></td></tr></table></td></tr>
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<tr><td>等级：<img border=0 src='images/small/icon_user.gif' align=absmiddle class=fr>&nbsp;Java初中<br>贴子：62<br>积分：60<br>Matrix币：0<br>注册：2004-7-29</td></tr>
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</td><td width='15%' align=center>第 <font class=red_3><b>3</b></font> 楼</td></tr>
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<tr><td class=bw><font class=htd>wenic老大,我用mysql,大量字符用text,<BR> <BR> 我问题中有个Object转换问题,能解决吗?</font></td></tr>
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<tr><td colspan=2 height=30 align=center valign=top><table border=0 width='96%' class=tf><tr><td class=bw><font class=htd>Chang&nbsp;the&nbsp;World&nbsp;or&nbsp;the&nbsp;Way&nbsp;it&nbsp;&nbsp;Thinks.<br>Think&nbsp;Different.</font></a></br> </td></tr></table></td></tr>
<tr><td height=25 colspan=2><table border=0 width='100%'><tr><td><img border=0 src='images/small/forum_tim.gif' align=absmiddle class=fr>&nbsp;<font class=gray>本贴发表时间：2005-3-29 16:02:00</font></td><td align=right><img src='images/small/ip.gif' align=absMiddle title='dakun 的IP是：*.*.*.*' border=0>　<img src='images/small/sys.gif' align=absMiddle title='操作系统：Windows XP ，浏览器：Internet Explorer 6.0' border=0>　<a href="javascript:forum_do_del('23','87647');"><img src='images/small/forum_del.gif' align=absMiddle border=0></a></td></tr></table></td></tr>
<tr><td></br><a href=http://www.matrix.org.cn/article/1261.html target=_blank><font class=red>Java文栏:在servlet中使用jfreereport直接产生pdf文件报表(3-16)</font></a></td></tr></table>
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<tr><td>等级：<img border=0 src='images/small/icon_user.gif' align=absmiddle class=fr>&nbsp;Java初中<br>贴子：62<br>积分：60<br>Matrix币：0<br>注册：2004-7-29</td></tr>
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</td><td width='15%' align=center>第 <font class=red_3><b>4</b></font> 楼</td></tr>
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<tr><td class=bw><font class=htd>恩,可能没理解我的意思,我用的是xDoclet来生成.hbm.xml文件,所以,我要是在bo里声明的是String变量,那么在.hbm.xml里是type=&quot;java.lang.String&quot;,数据库生成文件是*.dll,它直接默认在mysql中,这个STring变量是varchar,但是我要的是text类型.<BR> 如今,我用到了hibernate提供的数据类:它是这样继承下来的<BR> java.lang.Object<BR> &nbsp;&nbsp;net.sf.hibernate.type.AbstractType<BR> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;net.sf.hibernate.type.NullableType<BR> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;net.sf.hibernate.type.ImmutableType<BR> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;net.sf.hibernate.type.TextType<BR> <BR> TextType&nbsp;t=new&nbsp;TextType();<BR> String&nbsp;s=&quot;fweinlasdf&quot;;<BR> t.fromString&#118alue(s);//fromString(String)&nbsp;是自带方法,返回Object<BR> <BR> 后面的我要把Object向下转型到TextType就报错了!<BR> <BR> 不知道懂没懂...<BR> </font></td></tr>
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<tr><td colspan=2 height=30 align=center valign=top><table border=0 width='96%' class=tf><tr><td class=bw><font class=htd>Chang&nbsp;the&nbsp;World&nbsp;or&nbsp;the&nbsp;Way&nbsp;it&nbsp;&nbsp;Thinks.<br>Think&nbsp;Different.</font></a></br> </td></tr></table></td></tr>
<tr><td height=25 colspan=2><table border=0 width='100%'><tr><td><img border=0 src='images/small/forum_tim.gif' align=absmiddle class=fr>&nbsp;<font class=gray>本贴发表时间：2005-3-30 9:29:00</font></td><td align=right><img src='images/small/ip.gif' align=absMiddle title='dakun 的IP是：*.*.*.*' border=0>　<img src='images/small/sys.gif' align=absMiddle title='操作系统：Windows XP ，浏览器：Internet Explorer 6.0' border=0>　<a href="javascript:forum_do_del('23','87768');"><img src='images/small/forum_del.gif' align=absMiddle border=0></a></td></tr></table></td></tr>
<tr><td></br><a href=http://www.matrix.org.cn/article/1326.html target=_blank><font class=red>java文栏:利用JAVACC将HQL转换为SQL</font></a></td></tr></table>
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<tr><td>等级：<img border=0 src='images/small/icon_user.gif' align=absmiddle class=fr>&nbsp;Java初中<br>贴子：62<br>积分：60<br>Matrix币：0<br>注册：2004-7-29</td></tr>
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</td><td width='15%' align=center>第 <font class=red_3><b>5</b></font> 楼</td></tr>
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<tr><td class=bw><font class=htd>我说的都觉得复杂了...<BR> <BR> 反正就一句话:用什么类型可以在Mysql中实现text类型?</font></td></tr>
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