Java批处理添加数据

<%@page contentType="text/html; charset=gbk"%>
<%@page import="java.text.SimpleDateFormat"%>
<%@page import="java.util.List"%>
<%@page import="java.util.ArrayList"%>
<%@page import="java.sql.Connection"%>
<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.*"%>
<%
	///response.setContentType("text/html;charset=utf-8");
	boolean hasLayOutData = false;
	User user=(User)session.getAttribute(SessionConst.USER);
	System.out.println(user.getUserGUID());
	String layoutJson = (String)request.getParameter("layout");
	layoutJson = java.net.URLDecoder.decode(layoutJson,"gbk");
	String[] layouts = layoutJson.split(";");
	Connection conn=null;
	try {   
      conn=Conn.getConnection();    
      String cleanLayoutSql="delete from OFFICE_HOME_LAYOUT_BLOCK t where t.user_guid="+"'"+user.getUserGUID()+"'";
	  String sql = "INSERT INTO OFFICE_HOME_LAYOUT_BLOCK (ID, POSITION, LMMC,USER_GUID) VALUES(?,?,?,?)";   
      PreparedStatement prest = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);   
      conn.setAutoCommit(false);   
	  //Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);   
	  Statement stmt = conn.createStatement();
	  stmt.execute(cleanLayoutSql);
      for(int i = 0; i < layouts.length; i++){ 
      	 String[] values = layouts[i].split(",");
      	 String[] layoutName = values[1].split(":");
      	 String[] layoutPosition = values[2].split(":");
      	 int position = Integer.parseInt(layoutPosition[1]);
      	 System.out.println(new GUID()+":"+layoutPosition[1]+":"+layoutName[1]+":"+user.getUserGUID());
      	 
      	 prest.setString(1, new GUID().toString());   
         prest.setInt(2, position);   
         prest.setString(3, layoutName[1]);   
         prest.setString(4, user.getUserGUID());   
         prest.addBatch();  
      } prest.executeBatch();
        stmt.close();
		conn.commit();  
	} catch (SQLException ex) {   
		ex.printStackTrace();  
	}catch (Exception ex) {   
		ex.printStackTrace(); 
	} finally{
		if(conn!=null )conn.close();
	}

	//System.out.println(layouts);
	
%>