java - org.hibernate.MappingException : Unknown entity: java. lang.Integer

Question

我正在使用 maven 在 spring MVC 上做一个项目。我使用 Ajax 将我的数据传递给 Controller ​​。没问题..但是当我调用删除函数时，我得到了 org.hibernate.MappingException: Unknown entity: java .lang.整数。在我的代码下面..等待您的回复

网络.xml

            <?xml version="1.0" encoding="UTF-8"?>
            <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"            xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
            <servlet>
            <servlet-name>AccPerSpring</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/servlet-context.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup>
            </servlet>
            <servlet-mapping>
            <servlet-name>AccPerSpring</servlet-name>
            <url-pattern>/</url-pattern>
            </servlet-mapping>
            </web-app>

Spring 上下文.xml

            <?xml version="1.0" encoding="UTF-8"?>

            <beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:beans="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context"xmlns:tx="http://www.springframework.org/schema/tx"
            xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd">

             <!-- Enable @Controller annotation support -->
             <mvc:annotation-driven />

             <!-- Map simple view name such as "test" into /WEB-INF/views/test.jsp -->
            <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/" />
<property name="suffix" value=".jsp" />
            </bean>

            <!-- Scan classpath for annotations (eg: @Service, @Repository etc) -->
            <context:component-scan base-package="com.gerrytan.pizzashop"/>

            <!-- JDBC Data Source. It is assumed you have MySQL running on localhost port 3306 with 
   username root and blank password. Change below if it's not the case -->
            <!--  <bean id="myDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">  -->
           <bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> 
           <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
           <property name="url" value="jdbc:mysql://localhost:3306/mydatabase"/>
           <property name="username" value="root"/>
           <property name="password" value="kca@fnpl#12"/>
      </bean>

        <!-- Hibernate Session Factory -->
        <bean id="mySessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="myDataSource"/>
        <property name="packagesToScan">
        <array>
       <value>com.gerrytan.pizzashop</value>
        </array>
       </property>
       <property name="hibernateProperties">
       <value>
    hibernate.dialect=org.hibernate.dialect.MySQLDialect
      </value>
      </property>
      </bean>

      <!-- Hibernate Transaction Manager -->
      <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
      <property name="sessionFactory" ref="mySessionFactory"/>
      </bean>

      <mvc:resources mapping="/resources/**" location="/WEB-INF/resources/" />
      <!-- Activates annotation based transaction management -->
      <tx:annotation-driven transaction-manager="transactionManager"/>
      </beans>

Accountsconttroller .java

            package com.gerrytan.pizzashop;


            import org.springframework.beans.factory.annotation.Autowired;
            import org.springframework.stereotype.Controller;
            import org.springframework.ui.ModelMap;
            import org.springframework.web.bind.annotation.RequestMapping;
            import org.springframework.web.bind.annotation.RequestMethod;
            import org.springframework.web.bind.annotation.RequestParam;
            import org.springframework.web.bind.annotation.ResponseBody;

            import com.google.gson.Gson;

            @Controller
            @RequestMapping(value="/account")
            public class AccountsController {
            @Autowired
             private AccountService accountService;
            @Autowired
            private AccountDAO accountDao;
            private Accounts accounts;

       @RequestMapping(value="/list",method = RequestMethod.GET,produces="application/json")
       @ResponseBody
       public String getAllAccounts(ModelMap model){

    model.addAttribute("count",accountDao.getRowCount());
    model.addAttribute("allAddress",accountDao.getAccounts());
    String json= new Gson().toJson(model);
    return json;
      }
             @RequestMapping(value="/delete",method=RequestMethod.POST,produces="application/json")
        @ResponseBody
        public ModelMap deleteRow(ModelMap model,@RequestParam(value = "id", required = true) int id) {

    System.out.println(id);
    accountDao.delete(id);
    model.addAttribute("messageKey", "1");
    model.addAttribute("id", id);
    return model;
}}

实现.java

    @Override
public void delete(int id) {

     getCurrentSession().delete(id);
     System.out.println("fgfgfgfgf");

}

我的错误是当我调用从 Controller 中删除函数时

Answer 1

注意 hibernate 方法 getCurrentSession().delete(Object obj)，而不仅仅是给一个 id 作为参数。

@Override
public void delete(int id) {
    Account accounts = new Accounts();
    // hibernate deletes objects by the primary key
    accounts.setId(id);
    getCurrentSession().delete(accounts);
}