休眠：從表中application_category的關聯是指未映射類：allin.beans1.Application

Question

我用：

• 的NetBeans 8.x的

• Mysql數據庫

• analyseSI爲設計數據庫

• 作爲ORM休眠。

我嘗試關聯2個表：用戶和應用程序。

我使用名爲：User_Application的關聯表。

這裏我User.hmb.xml

<hibernate-mapping> 
    <class name="allin.beans1.User" table="user" catalog="allin" optimistic-lock="version"> 
     <id name="userId" type="java.lang.Integer"> 
      <column name="user_id" /> 
      <generator class="identity" /> 
     </id> 
     <property name="username" type="string"> 
      <column name="username" length="254" /> 
     </property> 
     <property name="password" type="string"> 
      <column name="password" length="254" /> 
     </property> 
     <property name="email" type="string"> 
      <column name="email" length="254" /> 
     </property> 
     <property name="firstName" type="string"> 
      <column name="first_name" length="254" /> 
     </property> 
     <property name="lastName" type="string"> 
      <column name="last_name" length="254" /> 
     </property> 
     <property name="age" type="java.lang.Short"> 
      <column name="age" /> 
     </property> 
     <property name="phone" type="java.lang.Integer"> 
      <column name="phone" /> 
     </property> 
     <property name="userCreation" type="timestamp"> 
      <column name="user_creation" length="19" /> 
     </property> 
     <property name="userLastReq" type="string"> 
      <column name="user_last_req" length="65535" /> 
     </property> 
     <property name="userError" type="string"> 
      <column name="user_error" length="65535" /> 
     </property> 
     <set name="applications" table="user_application" inverse="true" lazy="true" fetch="select"> 
      <key> 
       <column name="user_id" not-null="true" /> 
      </key> 
      <many-to-many entity-name="allin.beans1.Application"> 
       <column name="application_id" not-null="true" /> 
      </many-to-many> 
     </set> 
    </class> 
</hibernate-mapping> 

這裏我Application.hmb.xml：

<hibernate-mapping> 
    <class name="allin.beans1.Application" table="application" catalog="allin" optimistic-lock="version"> 
     <id name="applicationId" type="java.lang.Integer"> 
      <column name="application_id" /> 
      <generator class="identity" /> 
     </id> 
     <property name="applicationName" type="string"> 
      <column name="application_name" length="254" /> 
     </property> 
     <property name="applicationDescription" type="string"> 
      <column name="application_description" length="65535" /> 
     </property> 
     <property name="applicationCreation" type="timestamp"> 
      <column name="application_creation" length="19" /> 
     </property> 
     <property name="applicationUpdate" type="timestamp"> 
      <column name="application_update" length="19" /> 
     </property> 
     <property name="applicationLastReq" type="string"> 
      <column name="application_last_req" length="65535" /> 
     </property> 
     <set name="users" table="user_application" inverse="true" lazy="true" fetch="select"> 
      <key> 
       <column name="application_id" not-null="true" /> 
      </key> 
      <many-to-many entity-name="allin.beans1.User"> 
       <column name="user_id" not-null="true" /> 
      </many-to-many> 
     </set> 
     <set name="categories" table="application_category" inverse="false" lazy="true" fetch="select"> 
      <key> 
       <column name="application_id" not-null="true" /> 
      </key> 
      <many-to-many entity-name="allin.beans1.Category"> 
       <column name="category_id" not-null="true" /> 
      </many-to-many> 
     </set> 
    </class> 
</hibernate-mapping> 

這裏我休眠的conf：

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 
<hibernate-configuration> 
    <session-factory> 
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> 
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> 
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/allin?zeroDateTimeBehavior=convertToNull</property> 
    <property name="hibernate.connection.username">root</property> 
    <mapping resource="allin/beans1/Category.hbm.xml"/> 
    <mapping resource="allin/beans1/Application.hbm.xml"/> 
     <mapping resource="allin/beans1/User.hbm.xml"/> 
    </session-factory> 
</hibernate-configuration> 

我有這樣的錯誤時運行一個簡單的命令，如「From User」：

​​

在那裏我認爲錯誤是（在文件User.hmb.xml）線路：

<many-to-many entity-name="allin.beans1.Application"> 
      <column name="category_id" not-null="true" /> 
     </many-to-many> 

這就像沒有發現在User.hmb.xml文件Application.hbm.xml。 ..我忘記了一面旗幟或什麼？

感謝您的幫助！

編輯：

數據庫腳本：

DROP TABLE IF EXISTS User ; CREATE TABLE User (user_id INT AUTO_INCREMENT NOT NULL, username VARCHAR(254), password VARCHAR(254), email VARCHAR(254), first_name VARCHAR(254), last_name VARCHAR(254), age SMALLINT, phone INT, user_creation DATETIME, user_last_req TEXT, PRIMARY KEY (user_id)) ENGINE=InnoDB; DROP TABLE IF EXISTS Application ; CREATE TABLE Application (application_id INT AUTO_INCREMENT NOT NULL, application_name VARCHAR(254), application_description TEXT, application_creation DATETIME, application_update DATETIME, application_last_req TEXT, PRIMARY KEY (application_id)) ENGINE=InnoDB; DROP TABLE IF EXISTS Category ; CREATE TABLE Category (category_id INT AUTO_INCREMENT NOT NULL, category_name VARCHAR(254), category_description TEXT, category_last_req TEXT, PRIMARY KEY (category_id)) ENGINE=InnoDB; DROP TABLE IF EXISTS User_Application ; CREATE TABLE User_Application (user_id INT AUTO_INCREMENT NOT NULL, application_id INT NOT NULL, PRIMARY KEY (user_id, application_id)) ENGINE=InnoDB; DROP TABLE IF EXISTS Application_Category ; CREATE TABLE Application_Category (application_id INT AUTO_INCREMENT NOT NULL, category_id INT NOT NULL, PRIMARY KEY (application_id, category_id)) ENGINE=InnoDB; ALTER TABLE User_Application ADD CONSTRAINT FK_User_Application_user_id FOREIGN KEY (user_id) REFERENCES User (user_id); ALTER TABLE User_Application ADD CONSTRAINT FK_User_Application_application_id FOREIGN KEY (application_id) REFERENCES Application (application_id); ALTER TABLE Application_Category ADD CONSTRAINT FK_Application_Category_application_id FOREIGN KEY (application_id) REFERENCES Application (application_id); ALTER TABLE Application_Category ADD CONSTRAINT FK_Application_Category_category_id FOREIGN KEY (category_id) REFERENCES Category (category_id); 

Answer 1

可能 APPLICATION_ID出現在用戶表中，但你提到的實體的名稱，因爲它的應用程序更改爲用戶

<set name="applications" table="user_application" inverse="true" lazy="true" fetch="select"> 
      <key> 
       <column name="user_id" not-null="true" /> 
      </key> 
      <many-to-many entity-name="**allin.beans1.User**"> 
       <column name="application_id" not-null="true" /> 
      </many-to-many> 
     </set>