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74 lines
2.1 KiB
74 lines
2.1 KiB
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 java.sql.Connection;
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import javabean.Base;
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import javabean.Util;
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import net.sf.json.JSONArray;
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import net.sf.json.JSONObject;
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@WebServlet("/admin/ruleList")
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public class RuleList 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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// 准备查询
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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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String sql = "";
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// 准备返回参数
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int code = 1;
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String msg = "error";
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JSONArray jsonArray = new JSONArray();
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JSONObject jsonObject = new JSONObject();
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try {
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connection = (Connection) Base.getConnection();
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sql = "select * from rules";
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pstmt = connection.prepareStatement(sql);
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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("limit_day", resultSet.getString("limit_day"));
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jsonObject.put("borrow_num", resultSet.getString("borrow_num"));
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jsonObject.put("borrow_library", resultSet.getString("borrow_library"));
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jsonObject.put("overtime_fee", resultSet.getString("overtime_fee"));
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jsonArray.add(jsonObject);
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}
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code = 0;
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if(!jsonArray.isEmpty()) {
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msg = "查询成功";
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}else {
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msg = "没有数据";
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}
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} catch (SQLException e) {
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msg = "sql错误";
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} catch (ClassNotFoundException e) {
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msg = "class没找到";
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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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msg = "关闭失败";
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}
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}
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PrintWriter out = resp.getWriter();
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out.print( Util.jsonResponse(code, msg, jsonArray.toString()) );
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}
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}
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