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113 lines
3.6 KiB
113 lines
3.6 KiB
package servlet.manager;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.sql.Connection;
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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 javabean.Base;
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import net.sf.json.JSONArray;
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import net.sf.json.JSONObject;
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@WebServlet("/manager/borrowTable")
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public class BorrowTable 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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String where = ""; // 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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// 准备查询
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Connection connection = null;
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PreparedStatement pstmt = null;
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PreparedStatement countPstmt = null;
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ResultSet resultSet = null;
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ResultSet countSet = null;
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String sql = "";
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String countSql = "";
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// 准备返回参数
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int code = 1;
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String msg = "无数据";
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int count = 0;
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JSONObject jsonData = new JSONObject();
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JSONArray jsonArray = new JSONArray();
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JSONObject jsonResult = new JSONObject();
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// 进行查询
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try {
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connection = (Connection) Base.getConnection();
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sql = "select * from borrow_books where manager_id is not null";
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if (condition != null && conditionValue != null && !condition.equals("") && !conditionValue.equals("")) {
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where = " and " + condition + " like '%" + conditionValue + "%' ";
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sql += where;
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}
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sql += " limit ?,?";// 1 10 (1-1)*10
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System.out.println("???" + sql);
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pstmt = connection.prepareStatement(sql);
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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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resultSet = pstmt.executeQuery();
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while (resultSet.next()) {
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jsonData.put("id", resultSet.getString("id"));
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jsonData.put("card_id", resultSet.getString("card_id"));
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jsonData.put("book_id", resultSet.getString("book_id"));
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jsonData.put("borrow_date", resultSet.getString("borrow_date"));
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jsonData.put("end_date", resultSet.getString("end_date"));
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jsonData.put("return_date", resultSet.getString("return_date"));
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jsonData.put("illegal", resultSet.getString("illegal"));
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jsonData.put("manager_id", resultSet.getString("manager_id"));
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jsonArray.add(jsonData);
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}
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countSql = "select count(*) as count from borrow_books where manager_id is not null";
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countSql += where;
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countPstmt = connection.prepareStatement(countSql);
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countSet = countPstmt.executeQuery();
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if (countSet.next()) {
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count = countSet.getInt("count");
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}
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if (!jsonArray.isEmpty()) {
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code = 0;
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msg = "查询成功";
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}
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} catch (ClassNotFoundException e) {
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msg = "class没找到";
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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(null, pstmt, resultSet);
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Base.closeResource(connection, countPstmt, countSet);
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} catch (SQLException e) {
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msg = "关闭资源失败";
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}
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}
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// 返回数据
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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.toArray());
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PrintWriter out = resp.getWriter();
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out.print(jsonResult.toString());
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}
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}
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