Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.imagelake.android.purchasemanagement; import com.imagelake.control.DBFactory; import com.imagelake.control.UserDAOImp; import java.io.IOException; import java.io.PrintWriter; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.text.DecimalFormat; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.json.simple.JSONArray; import org.json.simple.JSONObject; /** * * @author RLN */ public class Servlet_purchaseVisePackages extends HttpServlet { JSONArray ja; UserDAOImp udi; public Servlet_purchaseVisePackages() { udi = new UserDAOImp(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { PrintWriter out = response.getWriter(); try { String type = request.getParameter("type"); String sql = "SELECT SQL_CALC_FOUND_ROWS user_has_packages.purchase_date,user_has_packages.expire_date,user_has_packages.user_id,user_has_packages.state,admin_package_income.total" + " FROM user_has_packages,admin_package_income WHERE user_has_packages.uhp_id=admin_package_income.uhp_id "; if (type != null && !type.equals("")) { if (type.equals("all")) { sql += "ORDER BY user_has_packages.purchase_date DESC "; ja = new JSONArray(); System.out.println("sql=" + sql); PreparedStatement ps = DBFactory.getConnection().prepareStatement(sql); ResultSet rs = ps.executeQuery(); if (rs.next()) { rs.close(); rs = ps.executeQuery(); while (rs.next()) { JSONObject jo = new JSONObject(); DecimalFormat df = new DecimalFormat(); jo.put("pur_date", rs.getString(1)); jo.put("exp_date", rs.getString(2)); jo.put("un", udi.getUn(rs.getInt(3))); if (rs.getInt(4) == 1) { jo.put("state", 1); } else if (rs.getInt(4) == 2) { jo.put("state", 2); } jo.put("income", df.format(rs.getDouble(5))); ja.add(jo); } System.out.println(ja.toJSONString()); out.write("json=" + ja.toJSONString()); } else { out.write("msg=No item found."); } } else if (type.equals("sort")) { ja = new JSONArray(); String from = request.getParameter("date"); String to = request.getParameter("date2"); String cat = request.getParameter("cat"); String buy = request.getParameter("buy"); System.out.println("date_pur:" + from); System.out.println("date_exp:" + to); System.out.println("cat:" + cat); System.out.println("buy:" + buy); if (cat.equals("0")) { cat = ""; } if (from != null && !from.trim().equals("") && to != null && !to.trim().equals("")) { String[] dt = from.split("-"); String[] dt2 = to.split("-"); String orDate = dt[2] + "-" + dt[1] + "-" + dt[0]; String orDate2 = dt2[2] + "-" + dt2[1] + "-" + dt2[0]; System.out.println("date=" + orDate); sql += " AND user_has_packages.purchase_date BETWEEN '" + orDate + "' AND '" + orDate2 + "' "; } if (cat != null && !cat.trim().equals("")) { sql += " AND user_has_packages.package_type='" + cat + "' "; } if (buy != null && !buy.trim().equals("")) { sql += " AND user_has_packages.user_id='" + buy + "' "; } sql += "ORDER BY user_has_packages.purchase_date DESC "; System.out.println("sql: " + sql); PreparedStatement ps = DBFactory.getConnection().prepareStatement(sql); ResultSet rs = ps.executeQuery(); DecimalFormat df = new DecimalFormat(); if (rs.next()) { rs.close(); rs = ps.executeQuery(); while (rs.next()) { JSONObject jo = new JSONObject(); jo.put("pur_date", rs.getString(1)); jo.put("exp_date", rs.getString(2)); jo.put("un", udi.getUn(rs.getInt(3))); if (rs.getInt(4) == 1) { jo.put("state", 1); } else if (rs.getInt(4) == 2) { jo.put("state", 2); } jo.put("income", df.format(rs.getDouble(5))); ja.add(jo); } System.out.println(ja.toJSONString()); out.write("json=" + ja.toJSONString()); } else { out.write("msg=No item found."); } } } else { out.write("msg=Internal server error,Please try again later."); } } catch (Exception e) { e.printStackTrace(); out.write("msg=Internal server error,Please try again later."); } } }