我试图从数据库中删除一个用户，但徒劳无功......我能够将用户保存到数据库中。
我的弹簧控制器类如下
CController.java
import project4.UserDAO1;
import project4.User1;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.multiaction.MultiActionController;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.validation.BindingResult;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
@Controller
public class CController{
private UserDAO1 userDAO;
@Autowired
@Qualifier("myUserDAO")
private UserDAOImpl1 myUserDAO;
public void setUserDAO(UserDAO1 userDAO) {
this.userDAO = userDAO;
}
@RequestMapping(value = "/frm4/add", method = RequestMethod.POST)
public ModelAndView add( @ModelAttribute("add") User1 user,HttpServletRequest
request,HttpServletResponse response) throws Exception {
System.out.println("hai");
userDAO.saveUser(user);
System.out.println("hai");
return new ModelAndView("redirect:/list.htm");
}
@RequestMapping(params = "/deleteuser/delete", method = RequestMethod.POST)
@Transactional
public ModelAndView delete(@ModelAttribute("delete") User1 user,HttpServletRequest
request,HttpServletResponse response) throws Exception {
userDAO.deleteUser(user);
return new ModelAndView("redirect:list.htm");
}
@RequestMapping(params = "find", method = RequestMethod.POST)
@Transactional
public ModelAndView find(@ModelAttribute("find") User1 user,HttpServletRequest
request,HttpServletResponse response) throws Exception {
userDAO.findUser(user);
return new ModelAndView("redirect:list.htm");
}
@RequestMapping(params = "update", method = RequestMethod.POST)
@Transactional
public ModelAndView update(@ModelAttribute("update") User1 user,HttpServletRequest
request,HttpServletResponse response) throws Exception {
userDAO.updateUser(user);
return new ModelAndView("redirect:list.htm");
}
@RequestMapping(value = "list", method = RequestMethod.GET)
public ModelAndView list(HttpServletRequest request,
HttpServletResponse response) throws Exception {
ModelMap modelMap = new ModelMap();
modelMap.addAttribute("userList", userDAO.listUser());
modelMap.addAttribute("user", new User1());
return new ModelAndView("list", modelMap);
}
}
我的休眠模板类如下
import project4.User1;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
public class UserDAOImpl1 implements UserDAO1 {
private HibernateTemplate hibernateTemplate;
public void setSessionFactory(SessionFactory sessionFactory) {
this.hibernateTemplate = new HibernateTemplate(sessionFactory);
}
@Override
@Transactional(propagation=Propagation.REQUIRED, readOnly=false)
public void saveUser(User1 user) {
try {
System.out.println (user.getId ());
hibernateTemplate.save(user);
}catch (RuntimeException re){
throw re;
}
}
@Override
@SuppressWarnings("unchecked")
public List<User1> listUser() {
List<User1> result = hibernateTemplate.find("from User1");
System.out.println("hai");
System.out.println(result);
return result;
}
@Override
public void deleteUser(User1 user) {
hibernateTemplate.delete("from User1 where USER_ID=:" +user.getId());
}
@Override
public List<User1> findUser(User1 user) {
List<User1> result =hibernateTemplate.find("from User1 where USER_ID=:"
+user.getId());
return result;
}
@Override
public void updateUser(User1 user) {
hibernateTemplate.update(user);
}
}
我的前端jsp如下
frm4.jsp
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form method="POST" action="<%=request.getContextPath()%>/frm4/add">
<table>
<tr>
<td><label for="oid">Id:</label></td>
<td>
<input name="oid" value="${user.id}" />
</td>
</tr>
<tr>
<td>
<label for="name">Name:</label></td>
<td>
<input name="name" value="${user.name}" />
</td>
</tr>
<tr>
<td>
<label for="password">Password:</label></td>
<td>
<input name="password" value="${user.password}" />
</td>
</tr>
<tr>
<td>
<label for="gender">Gender:</label></td>
<td>
<input name="gender" value="${user.gender}" />
</td>
</tr>
<tr>
<td>
<label for="lastName">Country:</label></td>
<td>
<input name="country" value="${user.country}" />
</td>
</tr>
</table>
<input type="submit" value="Submit"/>
</form>
</body>
</html>
实现删除功能的jsp如下
删除用户.jsp
<%@ page import="java.util.Date" %>
<%@ page isELIgnored="false" %>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form method="POST" action="<%=request.getContextPath()%>/deleteuser/delete">
<P>Are you sure you want to delete this user??</P>
<input type="submit" value="Yes" />
</form>
<p> <a href="frm4.jsp">No</a></p>
</body>
</html>
如果我使用，我会收到“既没有绑定结果也没有普通目标对象”错误，所以我只是使用 jsp 表单标签。我对两个 jsp 文件使用相同的实现方法，但 deleteuser.jsp 没有映射到 spring 控制器类即CController.java
当我单击删除按钮时，我得到了 url
http://localhost:8080/Spring/deleteuser/delete
它只是搜索文件删除而不是映射到控制器。任何帮助 plzzz