專案框架資料庫表

分析：兩個表之間的關聯查詢需要兩個工具類，兩個工具類對應兩個對映檔案，這也是hibernate的缺點，幾個工具類就需要對應多少工具類 同時還需要將兩個類互相注入也就是user要注入到phone中，phone也需要注入到user中 同時在這其中如出現錯誤大部分是對映檔案配置出錯，需要注意對映檔案的名稱，需要的屬性。
程式碼塊 User.java package dao; import java.sql.Date; public class User { private String idcard; private String name; private String password; private String age; private String addr; Phone phone; public Phone getPhone() { return phone; } public void setPhone(Phone phone) { this.phone = phone; } public User() { } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getIdcard() { return idcard; } public void setIdcard(String idcard) { this.idcard = idcard; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAge() { return age; } public void setAge(String age) { this.age = age; } public String getAddr() { return addr; } public void setAddr(String addr) { this.addr = addr; } } User.hbm.xml

<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="dao"> <class name="User" table="t_person"> <id name="idcard" column="idcard"> <generator class="native" /> </id> <property name="name" column="name" /> <property name="password" column="password" /> <property name="age" column="age" /> <property name="addr" column="addr" /> <one-to-one name="phone" cascade="all" /> </class> </hibernate-mapping> Phone.java

package dao; public class Phone { String idcard; String phone; User user; public String getIdcard() { return idcard; } public void setIdcard(String idcard) { this.idcard = idcard; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public User getUser() { return user; } public void setUser(User user) { this.user = user; } } Phone.hbm.xml

<?xml version="1.0"?> <!-- 與javabean同包 --> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="dao"> <class name="Phone" table="t_phone"> <id name="idcard"> <generator class="native" /> </id> <property name="phone" column="phone" /> <many-to-one name="user" column="idcard" unique="true" insert="false" update="false" not-null="true" /> </class> </hibernate-mapping> hibernate.cfg.xml <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <!-- 通常，一個session-factory節點代表一個數據庫 --> <session-factory> <!-- 1. 資料庫連線配置 --> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql:///zdy?useUnicode=true&amp;characterEncoding=UTF8</property> <property name="hibernate.connection.username">root</property> <property name="hibernate.connection.password">root</property> <!-- 資料庫方法配置，hibernate在執行的時候，會根據不同的方言生成符合當前資料庫語法的sql --> <property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property> <!-- 2. 其他相關配置 --> <!-- 2.1 顯示hibernate在執行時候執行的sql語句 --> <property name="hibernate.show_sql">true</property> <!-- 2.2 格式化sql --> <property name="hibernate.format_sql">true</property> <!-- 2.3 自動建表 --> <property name="hibernate.hbm2ddl.auto">update</property> <!-- 3. 載入所有對映 --> <mapping resource="dao/User.hbm.xml"/> <mapping resource="dao/Phone.hbm.xml"/> </session-factory> </hibernate-configuration> Test.java package dao; import java.sql.Date; import java.util.*; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; public class Test { public static void main(String[] args) { Configuration config = new Configuration().configure(); SessionFactory sessionFactory = config.buildSessionFactory(); Session session = sessionFactory.openSession(); Transaction tx = session.beginTransaction(); String hql = "FROM User u,Phone t WHERE u.idcard=t.idcard "; Query query = session.createQuery(hql); List list = query.list(); System.out.println(list.toString()); // tx.commit(); session.close(); // sessionFactory.close();// 一定 不 要 關閉.這裡只是寫出來做例子 } }