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Batch delete in jsp

Source: Internet
Author: User
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Submission page:

<% @ Page language = "java" import = "java. util. *, java. SQL. *, com. it. bean. *" pageEncoding = "UTF-8" %>
<Jsp: useBean id = "common" class = "com. it. bean. pageinfo" scope = "page"/>


<! Doctype html public "-// W3C // dtd html 4.01 Transitional // EN">
<Html>
<Head>
<Title> </title>
<Script language = "javascript" type = "text/javascript">
Var flag = 1;
Function selectAll (){
If (flag = 1 ){
If (common_delete.selectdelete.length! = Undefined ){
For (var I = 0; I <common_delete.selectdelete.length; I ++)
Common_delete.selectdelete [I]. checked = true;
} Else {
Common_delete.selectdelete.checked = true;
}
Flag = 0;
} Else {
If (common_delete.selectdelete.length! = Undefined ){
For (var I = 0; I <common_delete.selectdelete.length; I ++)
Common_delete.chxSong [I]. checked = false;
} Else {
Common_delete.selectdelete.checked = false;
}
Flag = 1;
}
}
</Script>
</Head>
<Body>
<Div align = "center">
<Div align = "center">
<Form name = "common_delete" method = "post" action = "../CommonDeleteServlet">
<Table bgcolor = "# FFFFFF" border = "0" cellspacing = "0" cellpadding = "5">
<Tr bgcolor = "# cc99cc">
<Td width = "10%" align = "center"> <input type = "button" name = "selall" value = "select all/invert" onClick = "selectAll (); "> </td>
<Td width = "10%" align = "center"> <font face = "文" size = "4"> NO. </font> </td>
<Td width = "10%" align = "center"> <font face = "文" size = "4"> description </font> </td>
<Td width = "10%" align = "center"> <font face = "文" size = "4"> Category </font> </td>
<Td width = "20%" align = "center"> <font face = "文" size = "4"> diagnosis </font> </td>
<Td width = "10%" align = "center"> <font face = "文" size = "4"> Frequency </font> </td>
</Tr>
<%
Int I = 0;
String setcolor;
Try
{
ResultSet rst1 = common. getCommon ("100 ");
While (rst1.next ())
{
If (I % 2 = 0)
Setcolor = "# ffffff ";
Else
Setcolor = "# D9D9D9 ";
%>
<Tr bgcolor = <% = setcolor %>
<Td width = "10%" align = "center"> <input type = "checkbox" name = "selectdelete" value = "<% = rst1.getString (1 ). trim () %> "> </td>
<Td width = "10%" align = "center"> <font face = "_ GB2312" size = "3"> <% = rst1.getString (1 ). trim () %> </font> </td>
<Td width = "10%" align = "center"> <font face = "_ GB2312" size = "3"> <% = rst1.getString (3 ). trim () %> </font> </td>
<Td width = "10%" align = "center"> <font face = "_ GB2312" size = "3"> <% = rst1.getString (2 ). trim () %> </font> </td>
<Td width = "20%" align = "center"> <font face = "_ GB2312" size = "3"> <% = rst1.getString (4 ). trim () %> </font> </td>
<Td width = "10%" align = "center"> <font face = "_ GB2312" size = "3"> <% = rst1.getInt (6) %> </font> </td>
</Tr>
<%
I ++;
}
Rst1.close ();
}
Catch (Exception e ){}
%>
<Tr> <td colspan = "3"> & nbsp; </td>
<Td align = "center">
<Input type = "submit" value = "delete" onclick = "return confirm ('Are you sure you want to select? ') "> </Td> </tr>
</Table>
</Form>
</Div>
</Div>
</Body>
</Html>

 

Processing page:


Public class CommonDeleteServlet extends HttpServlet {


/**
*
*/
Private static final long serialVersionUID = 1L;


/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @ Param request the request send by the client to the server
* @ Param response the response send by the server to the client
* @ Throws ServletException if an error occurred
* @ Throws IOException if an error occurred
*/
Public void doGet (HttpServletRequest request, HttpServletResponse response)
Throws ServletException, IOException {
Request. setCharacterEncoding ("UTF-8 ");
PrintWriter out = response. getWriter ();
String [] selectdelete = request. getParameterValues ("selectdelete ");
String ids = "";
For (int I = 0; I <selectdelete. length; I ++ ){
Ids + = "'" + selectdelete [I] + "'";
If (I! = Selectdelete. length-1) ids + = ",";
}
String SQL = "delete from COMMON where id in (" + ids + ")";
Connection con = null;
Statement dodel = null;
DBcon dbcon = new DBcon ();
Try
{
Con = dbcon. getConn ();
Dodel = con. createStatement ();
Dodel.exe cuteUpdate (SQL );

Con. close ();
}
Catch (Exception e)
{
E. printStackTrace ();
}
Out. print ("<script language = 'javascript '> alert ('Do Success'); window. location. href = 'delete. jsp '; </script> ");
Out. flush ();
Out. close ();

}


/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @ Param request the request send by the client to the server
* @ Param response the response send by the server to the client
* @ Throws ServletException if an error occurred
* @ Throws IOException if an error occurred
*/
Public void doPost (HttpServletRequest request, HttpServletResponse response)
Throws ServletException, IOException {
DoGet (request, response );
}


}

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