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Spring MVC-從JSP表中刪除記錄

[英]Spring MVC - delete record from JSP table

我在JSP中獲得了表,該表是數據庫中表的鏡像(顯示了所有記錄和列),並且在每一行的旁邊都有“刪除”按鈕,該按鈕按ID從數據庫中刪除了行。 但是,當我單擊“刪除”按鈕時,數據庫中什么都沒有發生,似乎所選行的ID為空,但是在地址欄中顯示了所選ID。 我究竟做錯了什么?

控制器:

@RequestMapping(value="/checkout.html", method = RequestMethod.POST)
public ModelAndView checkOut(Model model, @RequestParam(value = "id", required = false) String id) throws SQLException{

    setAppContext();

    clinicService.deletePatient(id);

    List<Patient> patients = clinicService.getAllpatients();    
    model.addAttribute("patients", patients);

    ModelAndView checkout = new ModelAndView("CheckOut");
    return checkout;

}

道:

public void deletePatient(String id) throws SQLException {
    String query = "delete FROM virtualclinic.patient WHERE idpatient=?";
    Connection con = null;
    PreparedStatement ps = null;

        con = dataSource.getConnection();
        ps = con.prepareStatement(query);
        ps.setString(1, id);
        int out = ps.executeUpdate();

}

服務:

public void deletePatient(String id) throws SQLException {
    ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("clinicconfig.xml");
    patientDAO = ctx.getBean("patientDAO", PatientDAOImpl.class);

    patientDAO.deletePatient(id);
}

JSP文件:

<c:forEach items="${patients}" var="patient">
            <tr style="font-size: 10">
                <td>${patient.id}</td>
                <td>${patient.name}</td>
                <td>${patient.lastName}</td>
                <td>${patient.gender}</td>
                <td>${patient.age}</td>
                <td>${patient.phoneNumber}</td>
                <td>${patient.address}</td>
                <td>${patient.disease}</td>
                <td>${patient.condition}</td>
                <td>${patient.roomType}</td>
                <td>${patient.roomNumber}</td>
                <td>${patient.date}</td>
                <td><form action="/VirtualClinic/checkout.html?selectedPatient=${patient.id}"  method="post"><input type="submit" value="Delete"/></form></td>
            </tr>
            </c:forEach>

錯誤(?):

INFO: Mapped "{[/checkout.html],methods=[GET]}" onto public   org.springframework.web.servlet.ModelAndView  org.damian.controller.CheckOutController.infoPatient(org.springframework.ui.M    odel) throws java.sql.SQLException
lut 17, 2016 3:16:57 AM org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMa    pping register
INFO: Mapped "{[/checkoutPatient.html],methods=[GET]}" onto public org.springframework.web.servlet.ModelAndView org.damian.controller.CheckOutController.checkOut(org.springframework.ui.Model,java.lang.String) throws java.sql.SQLException

使用和GET而不是POST,並且因為在url上您正在使用參數selectedPatient而不是預期的id更改/

使您的控制器方法

@RequestMapping(value="/checkout.html", method = RequestMethod.GET)
public ModelAndView checkOut(Model model, @RequestParam(value = "selectedPatient", required = false) String id) throws SQLException{

    setAppContext();

    clinicService.deletePatient(id);

    List<Patient> patients = clinicService.getAllpatients();    
    model.addAttribute("patients", patients);

    ModelAndView checkout = new ModelAndView("CheckOut");
    return checkout;

}

如下更改您的刪除鏈接

 <td><a href="/VirtualClinic/checkout.html?selectedPatient=${patient.id}">delete</a></td>

我看不出有任何理由通過郵寄提出要求,這只是一個參數,您不需要表格

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