<%@ page import="java.sql.*"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> Insert title here <% String user = request.getParameter("userid"); String book = request.getParameter("bookid"); String date1 = request.getParameter("date1"); String date2 = request.getParameter("date2"); String sql1 = "select * from borrow_card where ID =" + user; ResultSet rs1 = borrow.executeQuery(sql1); if(session.getAttribute("manager")!=null){ if (rs1.next()) { int cardstatus = Integer.parseInt(rs1.getString("STATUS")); if(cardstatus!=0){ String sql2 = "select * from books where ID =" + book; ResultSet rs2 = borrow.executeQuery(sql2); if(rs2.next()){ //out.println(psw1 + " " + psw2); //String id = session.getAttribute("manager").toString(); int status=Integer.parseInt(rs2.getString("STATUS")); if(status==1){ String sql = "insert borrow_books(CARD_ID,BOOK_ID,BORROW_DATE,END_DATE)values('" + user + "','" + book + "','" + date1 + "','" + date2 + "');"; try { int i = borrow.executeUpdate(sql); if (i == 1) { %> <% String sql3="update books set STATUS=0 where ID="+book; borrow.executeUpdate(sql3); } else { %> <% } } catch (Exception e) { %> <% } }else{ %> <% } }else{ %> <% } }else{ %> <% } } else { %> <% } }else{ %> <% } %>