in11_db_update.htm

struts开发实例

<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;span CONTENTEDITABLE=true&gt;</span><span style="font-family: 宋体">编辑</span><span lang="EN-US">&lt;/span&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;span CONTENTEDITABLE=true&gt;</span><span style="font-family: 宋体">链接</span><span lang="EN-US">&lt;/span&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;/tr&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;logic:iterate name='dbList' id='dbList' 
type='emptyprj.dbList' scope='request'&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;logic:notEqual name='dbListForm' 
property='action' value='edit'&gt; </span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;tr&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;bean:write name='dbList' property='</span><span style="font-family: 宋体">序号</span><span lang="EN-US">' 
/&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;bean:write name='dbList' property='</span><span style="font-family: 宋体">姓名</span><span lang="EN-US">' 
/&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;bean:write name='dbList' property='</span><span style="font-family: 宋体">备注</span><span lang="EN-US">' 
/&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;a 
href=&quot;dbListAction.do?action=delete&amp;search=search&amp;expression=</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;bean:write name='dbList' property='</span><span style="font-family: 宋体">序号</span><span lang="EN-US">' 
/&gt;&quot;&gt;</span><span style="font-family: 宋体">删除</span><span lang="EN-US">&lt;/a&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;a 
href=&quot;dbListAction.do?action=edit&amp;search=search&amp;expression=</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;bean:write name='dbList' property='</span><span style="font-family: 宋体">序号</span><span lang="EN-US">' 
/&gt;&quot;&gt;</span><span style="font-family: 宋体">编辑</span><span lang="EN-US">&lt;/a&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;a 
href=&quot;dbListAction.do?action=link&amp;search=search&amp;expression=</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;bean:write name='dbList' property='</span><span style="font-family: 宋体">序号</span><span lang="EN-US">' 
/&gt;&quot;&gt;</span><span style="font-family: 宋体">链接</span><span lang="EN-US">&lt;/a&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;/tr&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;/logic:notEqual&gt; </span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;logic:equal name='dbListForm' 
property='action' value='edit'&gt; </span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;tr&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;form&nbsp; method='post' name='dbListForm' 
action=</span></p>
<p class="MsoNormal"><span lang="EN-US">
&quot;/DBApp/dbListAction.do?action=update&amp;search=search&amp;expression=</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;bean:write name='dbList' property='</span><span style="font-family: 宋体">序号</span><span lang="EN-US">' 
/&gt;&quot;&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;html:text name='dbList' property='</span><span style="font-family: 宋体">序号</span><span lang="EN-US">' 
/&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;html:text name='dbList' property='</span><span style="font-family: 宋体">姓名</span><span lang="EN-US">' 
/&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;html:text name='dbList' property='</span><span style="font-family: 宋体">备注</span><span lang="EN-US">' 
/&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;a 
href=&quot;dbListAction.do?action=delete&amp;search=search&amp;expression=</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;bean:write name='dbList' property='</span><span style="font-family: 宋体">序号</span><span lang="EN-US">' 
/&gt;&quot;&gt;</span><span style="font-family: 宋体">删除</span><span lang="EN-US">&lt;/a&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;html:submit value='</span><span style="font-family: 宋体">更新</span><span lang="EN-US">'&gt;&lt;/html:submit&gt;&lt;/form 
&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;form&nbsp; method='post' 
action=&quot;dbListAction.do?action=reset&amp;search=search&amp;expression=</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;bean:write name='dbList' property='</span><span style="font-family: 宋体">序号</span><span lang="EN-US">' 
/&gt;&quot; &gt;&lt;html:submit value='</span><span style="font-family: 宋体">取消</span><span lang="EN-US">'&gt;&lt;/html:submit&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;/form &gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;td&gt;&lt;a 
href=&quot;dbListAction.do?action=link&amp;search=search&amp;expression=</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;bean:write name='dbList' property='</span><span style="font-family: 宋体">序号</span><span lang="EN-US">' 
/&gt;&quot;&gt;</span><span style="font-family: 宋体">链接</span><span lang="EN-US">&lt;/a&gt;&lt;/td&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;/tr&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;/logic:equal&gt; </span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;/logic:iterate&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;tr&gt;&lt;td&nbsp; align=middle colSpan=7 
&gt;&lt;bean:write property='pagestr' name='dbListForm' filter='false' /&gt;&lt;/td&gt;&lt;/tr&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;/tr&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;/table&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;/body&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&lt;/html:html&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;</span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-family:黑体">
dbListDAO.java文件：</span></b></p>
<p class="MsoNormal"><span style="font-family: 宋体">　　这里定义一个</span><span lang="EN-US">DAO</span><span style="font-family: 宋体">类，用于实现数据加的查找、删除、更新、添加及生成分页字符串等功能。</span><span lang="EN-US">getPagestr(int 
ipage)</span><span style="font-family: 宋体">函数用于生成分页字符串，</span><span lang="EN-US">int 
ipage</span><span style="font-family: 宋体">参数用于转递当前页码。</span><span lang="EN-US">findSQL(String 
sql,int ipage)</span><span style="font-family: 宋体">函数用于查找数据库数据，</span><span lang="EN-US">String 
sql</span><span style="font-family: 宋体">参数用于转递</span><span lang="EN-US">SQL</span><span style="font-family: 宋体">查询语句字符串，</span><span lang="EN-US">int 
ipage</span><span style="font-family: 宋体">参数用于转递当前页码。</span></p>
<p class="MsoNormal"><b><span style="font-family:黑体">。。。。。。。。。。<span lang="EN-US">(省略)</span></span></b></p>
<p class="MsoNormal"><span lang="EN-US">public class dbListDAO {</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp; </span><b>
<span style="font-family: 宋体">与记录更新、删除和添加无关的代码省略。</span></b></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp; &nbsp;public void create(dbList m_dbList) 
throws SQLException {</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp; PreparedStatement ps = null;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp; //&lt;createSQL&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp; String sql = &quot;INSERT INTO dbo.Test 
VALUES (?,?,?)&quot;;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp; //&lt;/createSQL&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp; try {</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (con.isClosed()) {</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; throw new 
IllegalStateException(&quot;error.unexpected&quot;);</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //</span><span style="font-family: 宋体">用</span><span lang="EN-US">SQL 
Server</span><span style="font-family: 宋体">请加入下行</span><span lang="EN-US">:
</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; con.setAutoCommit(true);</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //SQL Server</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ps = con.prepareStatement(sql);</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //&lt;create&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ps.setInt(1,m_dbList.get</span><span style="font-family: 宋体">序号</span><span lang="EN-US">());</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ps.setString(2,m_dbList.get</span><span style="font-family: 宋体">姓名</span><span lang="EN-US">());</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ps.setString(3,m_dbList.get</span><span style="font-family: 宋体">备注</span><span lang="EN-US">());</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //&lt;/create&gt;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (ps.executeUpdate() != 1) {</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; throw new SQLException 
(&quot;error.create.dbList&quot;);</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp; } catch (SQLException e) {</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp; </span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; e.printStackTrace();</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; throw new 
RuntimeException(&quot;error.unexpected&quot;);</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp; } finally {</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; try {</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (ps != null)</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ps.close();</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; } catch (SQLException e) {</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; e.printStackTrace();</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; throw new 
RuntimeException(&quot;error.unexpected&quot;);</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp; }</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp; }</span></p>
<p class="MsoNormal"><span lang="EN-US">&nbsp;</span></p>