Java JSP servlet 500错误

时间：2018-05-16 04:45:03

标签： java jsp servlets dao

我有一个Java网站，它使用Servlet和JSP，服务器是我的本地主机。网站的大部分内容运作良好，但点击“更新患者”按钮时出现问题，显示“500内部”，错误信息为：

HTTP Status 500 – Internal Server Error

Type Exception Report

Message java.lang.NullPointerException

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

org.apache.jasper.JasperException: java.lang.NullPointerException
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:565)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:481)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Cause

java.lang.NullPointerException
    org.focus.DAO.PatientDAO.getAllPat(PatientDAO.java:220)
    org.focus.servlets.PatientUServlet.doGet(PatientUServlet.java:65)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:742)
    org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:712)
    org.apache.jsp.common.lp_jsp._jspService(lp_jsp.java:177)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:443)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

这是我的“lu.jsp”：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="java.util.*"%>

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>



<%
    String context = (String) request.getContextPath();
    String role = (String) session.getAttribute("role");
    String id = (String) session.getAttribute("id");
    String userName = (String) session.getAttribute("name");

    String errMsg = (String) request.getAttribute("error");
    if (errMsg == null) {
        errMsg = "";
    }

    String status = (String) request.getAttribute("status");
    if (status == null){
        status = "";
    }

%>


<html>
<head>


<script>
var context = '<%=context%>';
var role = '<%=role%>';
var id= '<%=id%>';
</script>
<!--import DHTMLX library component javascripts and css files-->
<link rel="stylesheet" type="text/css"
    href="<%=context%>/js/dhtmlx/dhtmlx.css" />

<link rel="stylesheet" type="text/css" href="<%=context%>/css/style.css">


</head>

<body>
<jsp:forward page="/PatientUServlet?action=listPatient"/>

</body>


<!--Footer-->
      <footer class="page-footer font-small blue pt-4 mt-4">


          <!--Copyright-->
          <div class="footer-copyright py-3 text-center">
              <div class="container-fluid">
                 <script>
var theDate=new Date();
document.write("© "+ theDate.getFullYear());</script>
              </div>
          </div>
          <!--/.Copyright-->

      </footer>
      <!--/.Footer-->
</html>

这是我的“listPatient.jsp”：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
  <%

  String  context = (String) request.getContextPath();
  String userName = (String) session.getAttribute("id");
  String role = (String) session.getAttribute("role");

    //out.println("CALLING main.jsp values: "+ userName +" "+role);
%>
   <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">


    <title>List Patient Template</title>

    <!-- Bootstrap core CSS -->
   <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">


    <!-- Custom styles for this template -->
    <link href="jumbotron.css" rel="stylesheet">

<script>
    var context = '<%=context%>';   
</script>

<script>
function ConfirmDelete()
{
    var Delet_Confirm= confirm("Do you really want to delete this record ?");
 if (Delet_Confirm== true && <%=role%>=="ADMIN")
 {
   return true;
 }
 else
 {
  return false;
  }
}
</script>

</head>
<body>

<% if (role.equals("ADMIN")) {%>

<nav class="navbar navbar-expand-md navbar-dark fixed-top bg-dark">

      <a class="navbar-brand" href="#">Navbar</a>
      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>

      <div class="collapse navbar-collapse" id="navbarsExampleDefault">

          <ul class="navbar-nav mr-auto">
          <li class="nav-item active">
            <a class="nav-link" href="<%=context%>/main.jsp">Home <span class="sr-only">(current)</span></a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="<%=context%>/common/myaccount.jsp">My Account</a>
          </li>


          <li class="nav-item">
            <a class="nav-link" href="<%=context%>/common/analysis.jsp?">Patient Analytics</a>
          </li>

  <li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Administrator Tasks
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
          <a class="dropdown-item" href="<%=context%>/common/register.jsp">Register BHCO</a>
          <a class="dropdown-item" href="<%=context%>/common/addpatient.jsp">Add Patient</a>
          <a class="dropdown-item" href="<%=context%>/common/assignpatient.jsp">Assign Patient</a>
          <a class="dropdown-item" href="<%=context%>/common/lu.jsp">Update User</a>
          <a class="dropdown-item" href="<%=context%>/common/lp.jsp">Update Patient</a>
        </div>
      </li>

        </ul>

        <form class="form-inline my-2 my-lg-0" action="<%=context%>/LogoutServlet" method="post">
          <a class="form-control mr-sm-2" href="#">Your role:  <%=role%> </a> 
          <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Logout</button>

        </form>
       </div>   

    </nav>
<%}else{ %>

<nav class="navbar navbar-expand-md navbar-dark fixed-top bg-dark">

      <a class="navbar-brand" href="#">Navbar</a>
      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>

      <div class="collapse navbar-collapse" id="navbarsExampleDefault">

          <ul class="navbar-nav mr-auto">
          <li class="nav-item active">
            <a class="nav-link" href="<%=context%>/main.jsp">Home <span class="sr-only">(current)</span></a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="<%=context%>/common/myaccount.jsp">My Account</a>
          </li>


          <li class="nav-item">
            <a class="nav-link" href="<%=context%>/common/analysis.jsp?">Patient Analytics</a>
          </li>



        </ul>

        <form class="form-inline my-2 my-lg-0" action="<%=context%>/LogoutServlet" method="post">
          <a class="form-control mr-sm-2" href="#">Your role:  <%=role%> </a> 
          <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Logout</button>

        </form>
       </div>   

    </nav>

<%} %>
<div class="box-centerside">
<br />
<br />
</div>

    <table class="table">
  <thead>
    <tr>
    <th>Patient Id</th>
    <th>First Name</th>
    <th>Last Name</th>
    <th>DOB</th>
    <th>Email</th>
    <th>Last Updated On</th>
    <th colspan=2>Action</th>
    </tr>
  </thead>
  <tbody>
      <c:forEach items="${pats}" var="pat">
                <tr>
                    <td><c:out value="${pat.patid}" /></td>
                    <td><c:out value="${pat.pfname}" /></td>
                    <td><c:out value="${pat.plname}" /></td>
                    <td><fmt:formatDate pattern="yyyy-MM-dd" value="${pat.dob}" /></td>
                    <td><c:out value="${pat.email}" /></td>
                    <td><c:out value="${pat.updatedate}" /></td>
                    <td><a href="<%=context%>/PatientUServlet?action=edit&patid=<c:out value="${pat.patid}"/>">Update</a></td>
                    <td><a onclick="return ConfirmDelete();" href="<%=context%>/PatientUServlet?action=delete&patid=<c:out value="${pat.patid}" />">Delete</a></td>
                </tr>
            </c:forEach>
        </tbody>
    </table>



<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js" integrity="sha384-b/U6ypiBEHpOf/4+1nzFpr53nxSS+GLCkfwBdFNTxtclqqenISfwAzpKaMNFNmj4" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js" integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1" crossorigin="anonymous"></script>
</body>
<!--Footer-->
      <footer class="page-footer font-small blue pt-4 mt-4">


          <!--Copyright-->
          <div class="footer-copyright py-3 text-center">
              <div class="container-fluid">
                 <script>
var theDate=new Date();
document.write("© "+ theDate.getFullYear() + " University of Pittsburgh");</script>
              </div>
          </div>
          <!--/.Copyright-->

      </footer>
      <!--/.Footer-->

这是我的“PatientUServlet.java”：

package org.focus.servlets;

import java.io.IOException;
import java.util.Date;
import java.text.ParseException;
import java.text.SimpleDateFormat;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.focus.DAO.PatientDAO;
import org.focus.data.Patient;


/**
 * Servlet implementation class UserServlet
 */
@WebServlet("/PatientUServlet")
public class PatientUServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;


        private static String INSERT_OR_EDIT = "/common/patient.jsp";
        private static String LIST_PAT = "/common/listPatient.jsp";
        private PatientDAO dao;


    /**
     * @throws Exception 
     * @see HttpServlet#HttpServlet()
     */
    public PatientUServlet() throws Exception {
        super();
        dao = new PatientDAO();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {



        String forward="";
        String action = request.getParameter("action");

        if (action.equalsIgnoreCase("delete")){
            int patid = Integer.parseInt(request.getParameter("patid"));
            dao.deletePat(patid);
            forward = LIST_PAT;
            request.setAttribute("pats", dao.getAllPat());    
        } else if (action.equalsIgnoreCase("edit")){
            forward = INSERT_OR_EDIT;
            int patid = Integer.parseInt(request.getParameter("patid"));
            Patient pat = dao.getPatById(patid);
            request.setAttribute("pat", pat);
        } else if (action.equalsIgnoreCase("listPatient")){
            forward = LIST_PAT;
            request.setAttribute("pats", dao.getAllPat());
        } else {
            forward = INSERT_OR_EDIT;
        }

        RequestDispatcher view = request.getRequestDispatcher(forward);
        view.forward(request, response);
                    }


    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         Patient pat = new Patient();
         pat.setPatid(Integer.parseInt(request.getParameter("patid")));
         pat.setMed_no(Integer.parseInt(request.getParameter("medNo")));
         pat.setFamily_id(Integer.parseInt(request.getParameter("familyId")));
         pat.setBlock_id(Integer.parseInt(request.getParameter("blockId")));
         pat.setCommunity_id(Integer.parseInt(request.getParameter("communityId")));
         pat.setEmail(request.getParameter("email"));
         pat.setPfname(request.getParameter("firstName"));
         pat.setPmname(request.getParameter("midName"));
         pat.setPlname(request.getParameter("lastName"));
         pat.setPhone(request.getParameter("phone"));
         pat.setGender(request.getParameter("gender"));
         pat.setRace(request.getParameter("race"));
         pat.setMaritalstatus(request.getParameter("maritalstatus"));
         pat.setStreetnum(request.getParameter("streetNumber"));
         pat.setStreetname(request.getParameter("streetName"));
         pat.setAptno(request.getParameter("aptNo"));
         pat.setCity(request.getParameter("city"));
         pat.setState(request.getParameter("state"));
         pat.setZip(Integer.parseInt(request.getParameter("zip")));
         pat.setLatitude(Double.parseDouble(request.getParameter("latitude")));
         pat.setLongitude(Double.parseDouble(request.getParameter("longitude")));

        Date dob;
            try {
                dob = new SimpleDateFormat("yyyy-MM-dd").parse(request.getParameter("dob"));
                pat.setDob(dob);
            } catch (ParseException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();

            }

             dao.updatePat(pat);

             RequestDispatcher view = request.getRequestDispatcher(LIST_PAT);
             request.setAttribute("pats", dao.getAllPat());
             view.forward(request, response);
    }
   }

这是我的“patientDAO”：

 package org.focus.DAO;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.Date;

import org.apache.log4j.Logger;
import org.focus.data.PatientAssignDataBean;
import org.focus.data.PatientDataBean;
import org.focus.data.Patient;
import org.focus.db.JdbcUtil;
import org.focus.util.DbUtil;

public class PatientDAO {
    private static Logger log = Logger.getLogger(PatientDAO.class);


    private Connection connection1;

        public PatientDAO() throws Exception {

            connection1 = DbUtil.getConnection();
        }



        private static java.sql.Timestamp getCurrentTimeStamp() {

            java.util.Date today = new java.util.Date();
            return new java.sql.Timestamp(today.getTime());

        }

    public static ArrayList<PatientDataBean> getAllPatients(){
        ArrayList<PatientDataBean> result = new ArrayList<>();
        try ( Connection con = JdbcUtil.getConnection()) {
            String sql= "select patientid,patient_first_name,patient_last_name from patients";
            try (Statement st = con.createStatement()) {
                System.out.println(sql);
                ResultSet rs = st.executeQuery(sql);
                while (rs.next()){
                    result.add(new PatientDataBean(rs.getInt(1),rs.getString(2),rs.getString(3)));
                }
            } catch (Exception e) {
                log.error("Statement in patients search error", e);
                e.printStackTrace();
                result = null;
            }

            }
         catch (Exception e) {
            log.error("patients search error", e);
            e.printStackTrace();
            result = null;
        }

        return result;

    }
    public static ArrayList<PatientDataBean> getAllUnassignedPatients(){
        ArrayList<PatientDataBean> result = new ArrayList<>();
        try ( Connection con = JdbcUtil.getConnection()) {
            String sql= "select patientid,patient_first_name,patient_last_name "
                    + "from patients where patientid not in (select patientid from patientsassigns)";
            try (Statement st = con.createStatement()) {
                System.out.println(sql);
                ResultSet rs = st.executeQuery(sql);
                while (rs.next()){
                    result.add(new PatientDataBean(rs.getInt(1),rs.getString(2),rs.getString(3)));

                }
            } catch (Exception e) {
                log.error("Statement in patients search error", e);
                e.printStackTrace();
                result = null;
            }

            }
         catch (Exception e) {
            log.error("patients search error", e);
            e.printStackTrace();
            result = null;
        }

        return result;

    }

    public static ArrayList<PatientAssignDataBean> getAllAssignedPatientsAndUsers(){
        ArrayList<PatientAssignDataBean> result = new ArrayList<>();
        try ( Connection con = JdbcUtil.getConnection()) {
            String sql= "SELECT pa.uid,pa.patientid "
                    + "from patientsassigns pa";
            try (Statement st = con.createStatement()) {
                System.out.println(sql);
                ResultSet rs = st.executeQuery(sql);
                while (rs.next()){
                    result.add(new PatientAssignDataBean(rs.getString(1),rs. getInt(2)));
                }
            } catch (Exception e) {
                log.error("Statement in patientassign search error", e);
                e.printStackTrace();
                result = null;
            }

            }
         catch (Exception e) {
            log.error("patientassign search error", e);
            e.printStackTrace();
            result = null;
        }

        return result;

    }




    public static int getNameById(int pid){
        PatientDataBean result = new PatientDataBean();
        try ( Connection con = JdbcUtil.getConnection()) {
            String sql= "select patientid from patient where patientid = " + pid;
            try (Statement st = con.createStatement()) {
                System.out.println(sql);
                ResultSet rs = st.executeQuery(sql);
                while (rs.next()){
                    result = new PatientDataBean(rs.getInt(1));
                }
            } catch (Exception e) {
                log.error("Statement in users search error", e);
                e.printStackTrace();
                result = null;
            }

            }
         catch (Exception e) {
            log.error("patients search error", e);
            e.printStackTrace();
            result = null;
        }

        return result.getPatientId();

    }




    /*New CRUD OPERATIONS START FOR USERS - SM*/


//Join to patient assigns to get BHCO info to check if the BHCO is admin in order to delete
    public void deletePat(int pat) {
        try {
            PreparedStatement preparedStatement = connection1
                    .prepareStatement("delete from patients p where patientid=?");
            // Parameters start with 1
            preparedStatement.setInt(1, pat);
            preparedStatement.executeUpdate();

        } catch (SQLException e) {
            e.printStackTrace();
        }
    }


  //Join to patient assigns to get BHCO info to check if the BHCO is admin in order to update
    public void updatePat(Patient pat) {
        java.text.SimpleDateFormat sdf = 
                 new java.text.SimpleDateFormat("yyyy-MM-dd");

        String dob = sdf.format(pat.getDob());
        try {
            PreparedStatement preparedStatement = connection1
                    .prepareStatement("update patients p set med_no=?, family_id=?,block_id=?,community_id=?,email=?, "
                            +"patient_first_name=?,patient_mid_name=?, patient_last_name=?,patient_phone_number=?, "
                            +"gender=?,dob=?,race=?,maritalstatus=?,streetnumber=?,aptno=?,city=?,state=?,zip=?, "
                            +"latitude=?,longitude=?,update_date=? "
                            +"where patientid=?");
            // Parameters start with 1
            preparedStatement.setInt(1, pat.getMed_no());
            preparedStatement.setInt(2, pat.getFamily_id());
            preparedStatement.setInt(3, pat.getBlock_id());
            preparedStatement.setInt(4, pat.getCommunity_id());
            preparedStatement.setString(5, pat.getEmail());
            preparedStatement.setString(6, pat.getPfname());
            preparedStatement.setString(7, pat.getPmname());
            preparedStatement.setString(8, pat.getPlname());
            preparedStatement.setString(9, pat.getPhone());
            preparedStatement.setString(10, pat.getGender());
            //preparedStatement.setDate(11, new java.sql.Date(pat.getDob().getTime()));
            preparedStatement.setString(11, dob);
            preparedStatement.setString(12, pat.getRace());
            preparedStatement.setString(13, pat.getMaritalstatus());
            preparedStatement.setString(14, pat.getStreetnum());
            preparedStatement.setString(15, pat.getAptno());
            preparedStatement.setString(16, pat.getCity());
            preparedStatement.setString(17, pat.getState());
            preparedStatement.setInt(18, pat.getZip());
            preparedStatement.setDouble(19, pat.getLatitude());
            preparedStatement.setDouble(20, pat.getLongitude());
            preparedStatement.setTimestamp(21,getCurrentTimeStamp());
            preparedStatement.setInt(22, pat.getPatid());
            preparedStatement.executeUpdate();

        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public List<Patient> getAllPat() {
        List<Patient> pats = new ArrayList<Patient>();
        try {
            Statement statement = connection1.createStatement();
            ResultSet rs = statement.executeQuery("select patientid,patient_first_name,patient_last_name,dob,email,update_date from patients");
            while (rs.next()) {
                Patient pat = new Patient();
                pat.setPatid(rs.getInt("patientid"));
                pat.setPfname(rs.getString("patient_first_name"));
                pat.setPlname(rs.getString("patient_last_name"));
                pat.setDob(rs.getDate("dob"));
                pat.setEmail(rs.getString("email"));
                pat.setUpdatedate(rs.getString("update_date"));
                pats.add(pat);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return pats;
    }

    public Patient getPatById(int patid) {
        Patient pat = new Patient();
        try {
            PreparedStatement preparedStatement = connection1.
                    prepareStatement("select patientid,patient_first_name,patient_last_name,dob,email from patients where patientid=?");
            preparedStatement.setInt(1, patid);
            ResultSet rs = preparedStatement.executeQuery();

            if (rs.next()) {
                pat.setPatid(rs.getInt("patientid"));
                pat.setPfname(rs.getString("patient_first_name"));
                pat.setPlname(rs.getString("patient_last_name"));
                pat.setDob(rs.getDate("dob"));
                pat.setEmail(rs.getString("email"));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return pat;
    }





}

我的期望是我可以使用DAO从数据库中获取所有患者，然后当我单击“更新患者”按钮时，它将跳转到“lu.jsp”并且在“lu.jsp”中您可以看到它将到“listPatient.jsp”，然后打印每个患者的信息。但是，它不起作用。然后我在浏览器中键入“lu.jsp”，它也显示相同的“500内部错误”。然后我在浏览器中输入“listPatient.jsp”，它没有显示错误，但网页上没有患者信息。所以我想也许我没有正确评估患者信息？怎么了？谢谢！

1 个答案:

答案 0 :(得分：1)

使用

时出现空指针错误 
getAllpat()

先检查一下。

发生空指针的其他可能性。

1. in Session creation or setAttribute() method.
2. in request parameter in servlet.
3. or in dao method if resultset have null value from database it will be not set in setmethod().

我认为你有第三种类型的错误，所以在数据库或方法中检查它 getallpat（）

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