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package servlet.admin;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import com.mysql.jdbc.Connection;
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import javabean.Base;
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import net.sf.json.JSONArray;
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import net.sf.json.JSONObject;
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/**
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* Servlet implementation class CardList
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*/
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@WebServlet("/admin/cardList")
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public class CardList extends HttpServlet {
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@Override
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protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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resp.setContentType("application/json; charset:utf8");
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// 接收参数
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String limit = req.getParameter("limit");
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String page = req.getParameter("page");
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String condition = (String) req.getParameter("condition");
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String conditionValue = (String) req.getParameter("conditionValue");
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System.out.println("condition:--" +condition+ " "+ conditionValue);
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String where = null; // 无限制条件
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if(page == null) {
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page = "1";
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}
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if(limit == null) {
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limit = "10";
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}
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System.out.println(where);
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Connection connection = null;
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PreparedStatement pstmt = null;
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ResultSet resultSet = null;
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int code = 1;
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String msg = "error";
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int count = 0;
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String sql = "";
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//String countSql = ""
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JSONObject jsonObject = new JSONObject();
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JSONArray jsonArray = new JSONArray();
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JSONObject jsonResult = new JSONObject();
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try {
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// 获取数据
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connection = (Connection) Base.getConnection();
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sql = "select id,password,reader,rule_id,status from borrow_card";
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// where
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if(condition != null && conditionValue != null && !condition.isEmpty() && !conditionValue.isEmpty()) {
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where = " where "+ condition +" like '%" +conditionValue +"%' ";
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sql = sql+where;
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}
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System.out.println(sql);
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// 分页
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sql +=" limit ?,?";
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pstmt = connection.prepareStatement(sql);
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try {
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System.out.println((Integer.parseInt(page)-1) * Integer.parseInt(limit));
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System.out.println(Integer.parseInt(limit));
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pstmt.setInt(1, (Integer.parseInt(page)-1) * Integer.parseInt(limit) );
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pstmt.setInt(2, Integer.parseInt(limit));
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} catch (NumberFormatException | SQLException e1) {
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System.out.println("?????sqlerror");
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}
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resultSet = pstmt.executeQuery();
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while(resultSet.next()) {
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jsonObject.put("id", resultSet.getString("id"));
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jsonObject.put("password", resultSet.getString("password"));
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jsonObject.put("reader", resultSet.getString("reader"));
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jsonObject.put("rule_id", resultSet.getString("rule_id"));
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jsonObject.put("status", resultSet.getString("status"));
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jsonArray.add(jsonObject);
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}
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// 获取总数
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sql = "select count(*) as count from borrow_card ";
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// 有限制
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if(where!=null) {
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sql = sql+where;
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}
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pstmt = connection.prepareStatement(sql);
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resultSet = pstmt.executeQuery();
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if(resultSet.next()) {
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count = resultSet.getInt("count");
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}
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if(!jsonArray.isEmpty()) {
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code = 0;
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msg = "成功";
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}
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} catch (ClassNotFoundException e) {
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msg = "没找到";
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e.printStackTrace();
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} catch (SQLException e) {
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msg = "sql错误";
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}finally {
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try {
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Base.closeResource(connection, pstmt, resultSet);
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} catch (SQLException e) {
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// TODO Auto-generated catch block
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msg = "关闭失败";
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}
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}
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jsonResult.put("code", code);
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jsonResult.put("count", count);
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jsonResult.put("msg", msg);
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jsonResult.put("data", jsonArray.toString());
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System.out.println(jsonResult.toString());
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PrintWriter out = resp.getWriter();
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out.print(jsonResult.toString());
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//out.print("{\"code\":0,\"msg\":\"\",\"count\":\"234\",\"data\":[{\"id\":\"1\",\"password\":\"23442\",\"reader\":\"minm\",\"rule_id\":\"1\",\"status\":\"2\"}]}");
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}
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}
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