JSP page to implement check box selection and __js, check delete function

form page in JSP

<span style= "FONT-SIZE:12PX;" ><form action= "<%= request.getcontextpath ()%>/delectservlet" Method=post> <tr> <th&gt
	  				  	;
	  				  	  	   Select/Reverse <input type= "checkbox" id= "Checkall" name= "Checkall" onclick= "Checkall (checkall)"/><br> <input type= "Submit" value= "Delete onclick=" return confirm (' OK delete selection. ' "align=" left "> <input type=" button "value=" Modify "onclick=" Dodelete () "align=" left "> </ th> <th> number </th> <th> username </th> <th> password </th> <th> name &L t;/th> <th> mailbox </th> <th> sex </th> <th> birthday </th> <th> Hobby

	   </th> <th> Salary </th> <th> other </th> <th> role </th> </tr> <c:foreach var= "Person" items= "${jsp}" > <tr> <td align = "center" ><input type= checkbox "Id= ' ${person.id} ' name= ' info 'Value= ' ${person.id} '/></td> <td>${person.id}</td> <td>${person.username}</td > <td>${person.passwd}</td> <td>${person.realname}</td> <td>${person .email}</td> <td>${person.sex}</td> <td>${person.birth}</td> <td&gt
  	  		;${person.habit}</td> <td>${person.salary}</td> <td>${person.other}</td> <td>${person.role}</td> </tr> </c:forEach> &LT;/FORM&GT;&LT;/SPAN&G T

JS Implementation of the full selection of the reverse function

<script type= "Text/javascript" >
		function Checkall (checkall) {  
			arr = document.getelementsbyname (' info ' ); 
			if (checkall.checked = = True) {for 
				(i=0;i<arr.length;i++) { 
					
					arr[i].checked = true; 
				}

				} else{for
					(i=0;i<arr.length;i++) { 
						if (Arr[i]). Checked==false) {
							arr[i].checked = true;
						} else
						{arr[i].checked = false;  

		}}} </script>

Implementing the selected Servlet class for deletion

Package servlet;
Import java.io.IOException;

Import Java.io.PrintWriter;
Import Javax.servlet.RequestDispatcher;
Import javax.servlet.ServletException;
Import Javax.servlet.http.HttpServlet;
Import Javax.servlet.http.HttpServletRequest;

Import Javax.servlet.http.HttpServletResponse;
Import Dao.dao;

Import Dao.daojdbcimpl; /** * Servlet Implementation Class Delectservlet */public class Delectservlet extends HttpServlet {private static fin
       
   Al long serialversionuid = 1L; protected void ProcessRequest (HttpServletRequest request, httpservletresponse response) throws Servletexception, IOE
	   xception {response.setcontenttype ("text/html;charset=utf-8");
	   PrintWriter Out=response.getwriter (); 
	   string[] Selectdelete = request.getparametervalues ("info"); 
	   String ids = ""; 
	   for (int i=0;i<selectdelete.length;i++) {ids = = "" +selectdelete[i]+ ""; 
	   if (i!=selectdelete.length-1) ids+= ",";
		try {dao DAO = new Daojdbcimpl ();
		Dao.remove (IDS);Out.print (' <script language= ' JavaScript ' >alert (' delete succeeded.
		'); window.location.href= ' Showservlet ';</script> ');
		Out.flush ();
	Out.close (); catch (Exception e) {//TODO auto-generated Catch Block}}/** * @see httpservlet#doget (httpservletre Quest request, HttpServletResponse response) * * protected void doget (HttpServletRequest request, HttpServletResponse
   Response) throws Servletexception, IOException {processrequest (request, response); /** * @see Httpservlet#dopost (httpservletrequest request, httpservletresponse response) * * protected void Dopo St (HttpServletRequest request, httpservletresponse response) throws Servletexception, IOException {processreque
   St (request, Response);
 }

}

JDBC Database Delete data

    Remove person public

    void remove (String id) throws exception{
    	 DBC = new Daojdbcimpl ();
    	 String sql= "Delete from person where id" ("+id+");
    	 PreparedStatement PST = Dbc.getconnection (). preparestatement (SQL);
    	 Pst.executeupdate ();
        Pst.close ();
        Dbc.close ();
    }