Hibernate集合映射

准备找工作，重新整理一下Hibernate，今天做了集合映射的测试，以前是使用MyEclipse自动生成，今天开始手动配置。
在手动配置的过程中还真是出了不少问题，少包，漏写这漏写那，不过还好，很快都把错误排除了。
其中这个问题记录一下：
No CurrentSessionContext configured!" 异常
之前都是getSession()或用spring整合做web，所以没有注意到单独使用hibernate时如果用SessionFactory.getCurrentSession()要配置上这个:
<property name="current_session_context_class">thread</property>
为当前Session指定一个策略。
Set集合测试
build.xml

<?xml version="1.0"?>
<project default="main" basedir=".">
    <property name="src" value="src"/>
    <property name="bin" value="bin"/>
    <property name="lib" value="lib"/>
    <property name="xdoclet.home" value="D:/xdoclet-plugins-1.0.3"/>
    <path id="xdoclet.task.classpath">
        <fileset dir="${xdoclet.home}/lib">
            <include name="**/*.jar"/>
        </fileset>
        <fileset dir="${xdoclet.home}/plugins">
            <include name="**/*.jar"/>
        </fileset>
    </path>

    <taskdef
        name="xdoclet"
        classname="org.xdoclet.ant.XDocletTask"
        classpathref="xdoclet.task.classpath"
    />
    <target name="生成配置文件">
        <xdoclet>
            <fileset dir="${src}/pojo/">
                <include name="**/*.java"/>
            </fileset>
            <component
                classname="org.xdoclet.plugin.hibernate.HibernateConfigPlugin"
                    destdir="${src}"
                    version="3.0"
                    hbm2ddlauto="update"
                    jdbcurl="jdbc:mysql://localhost/hib"
                    jdbcdriver="com.mysql.jdbc.Driver"
                    jdbcusername="root"
                    jdbcpassword="520"
                    dialect="org.hibernate.dialect.MySQLDialect"
                    showsql="true"
            />
        </xdoclet>
    </target>

    <target name="生成映射文件">
        <xdoclet>
            <fileset dir="${src}/pojo">
                <include name="**/*.java"/>
            </fileset>
            <component
                classname="org.xdoclet.plugin.hibernate.HibernateMappingPlugin"
                version="3.0"
                destdir="${src}"
            />
        </xdoclet>
    </target>
</project>

<?xml version="1.0"?>
<project default="main" basedir=".">
	<property name="src" value="src"/>
    <property name="bin" value="bin"/>
	<property name="lib" value="lib"/>
	<property name="xdoclet.home" value="D:/xdoclet-plugins-1.0.3"/>
	<path id="xdoclet.task.classpath">
		<fileset dir="${xdoclet.home}/lib">
			<include name="**/*.jar"/>
		</fileset>
		<fileset dir="${xdoclet.home}/plugins">
			<include name="**/*.jar"/>
		</fileset>
	</path>
	
	<taskdef 
		name="xdoclet"
		classname="org.xdoclet.ant.XDocletTask"
		classpathref="xdoclet.task.classpath"
	/>
	<target name="生成配置文件">
		<xdoclet>
			<fileset dir="${src}/pojo/">
				<include name="**/*.java"/>
			</fileset>
			<component
				classname="org.xdoclet.plugin.hibernate.HibernateConfigPlugin"
					destdir="${src}"
					version="3.0"
					hbm2ddlauto="update"
					jdbcurl="jdbc:mysql://localhost/hib"
					jdbcdriver="com.mysql.jdbc.Driver"
					jdbcusername="root"
					jdbcpassword="520"
					dialect="org.hibernate.dialect.MySQLDialect"
					showsql="true"	
			/>
		</xdoclet>
	</target>	
	
	<target name="生成映射文件">
		<xdoclet>
			<fileset dir="${src}/pojo">
				<include name="**/*.java"/>
			</fileset>
			<component 
				classname="org.xdoclet.plugin.hibernate.HibernateMappingPlugin"
				version="3.0"
				destdir="${src}"
			/>
		</xdoclet>
	</target>
</project>

Hibernate.cfg.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<!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.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://localhost/hib</property>
    <property name="hibernate.connection.username">root</property>
    <property name="hibernate.connection.password">520</property>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="hibernate.show_sql">true</property>
    <property name="hibernate.hbm2ddl.auto">update</property>
    <property name="current_session_context_class">thread</property>
    <mapping resource="pojo/Customer.hbm.xml"/>
    <mapping resource="pojo/Img.hbm.xml"/>
  </session-factory>
</hibernate-configuration>

<?xml version="1.0" encoding="ISO-8859-1"?>
<!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.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://localhost/hib</property>
    <property name="hibernate.connection.username">root</property>
    <property name="hibernate.connection.password">520</property>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="hibernate.show_sql">true</property>
    <property name="hibernate.hbm2ddl.auto">update</property>
    <property name="current_session_context_class">thread</property>
    <mapping resource="pojo/Customer.hbm.xml"/>
    <mapping resource="pojo/Img.hbm.xml"/>
  </session-factory>
</hibernate-configuration>

Customer.java

package pojo;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
/**
 * @author Administrator
 *@hibernate.class
 *  table=T_Customer
 */
public class Customer {
    /**
     * @hibernate.id
     * column="cid"
     *  generator-class="native"
     */
    private int id;
    /**
     * @hibernate.property
     *  column="name"
     */
    private String name;
    /**
     * @hibernate.property
     *  column="data"
     */
    private Date data;
    /**
     * @hibernate.property
     *  column="address"
     */
    private String address;
    /**
     * @hibernate.set
     * table="T_Img"
     * @hibernate.key
     *  column="cid"
     * @hibernate.element
     * column="name"
     * type="string"
     */
    private Set img;
    }

package pojo;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
/**
 * @author Administrator
 *@hibernate.class
 *	table=T_Customer
 */
public class Customer {
	/**
	 * @hibernate.id
	 * column="cid"
	 * 	generator-class="native"
	 */
	private int id;
	/**
	 * @hibernate.property
	 * 	column="name"
	 */
	private String name;
	/**
	 * @hibernate.property
	 *  column="data"
	 */
	private Date data;
	/**
	 * @hibernate.property
	 *  column="address"
	 */
	private String address;
	/**
	 * @hibernate.set 
	 * table="T_Img"
	 * @hibernate.key
	 *  column="cid"
	 * @hibernate.element
	 * column="name"
	 * type="string"
	 */
	private Set img;
	}

Img.java

package pojo;
/**
 *
 * @author Administrator
 *@hibernate.class
 *  table="T_Img"
 */
public class Img {
    /**
     * @hibernate.id
     * column="img_id"
     *  generator-class="native"
     */
    private int id;
    /**
     * @hibernate.property
     *  column="name"
     */
    private String name;
}

package pojo;
/**
 * 
 * @author Administrator
 *@hibernate.class
 *	table="T_Img"
 */
public class Img {
	/**
	 * @hibernate.id
	 * column="img_id"
	 * 	generator-class="native"
	 */
	private int id;
	/**
	 * @hibernate.property
	 * 	column="name"
	 */
	private String name;
}

//manager

public class CustomerManagerImpl extends BaseManager implements CustomerManager {
    public void addCustomer(Customer customer) {
        Session session=getSession();
        Transaction tr = session.beginTransaction();
        session.save(customer);
        tr.commit();
        closeSession(session);
    }
    public void delCustomer(int id) {
        Session session=getSession();
        Transaction tr = session.beginTransaction();
        Customer customer=(Customer)session.load(Customer.class, id);
        session.delete(customer);
        tr.commit();
        closeSession(session);
    }
}

public class CustomerManagerImpl extends BaseManager implements CustomerManager {	
	public void addCustomer(Customer customer) {
		Session session=getSession();
	 	Transaction tr = session.beginTransaction();
		session.save(customer);
		tr.commit();
		closeSession(session);
	}
	public void delCustomer(int id) {
		Session session=getSession();
	 	Transaction tr = session.beginTransaction();
	 	Customer customer=(Customer)session.load(Customer.class, id);
		session.delete(customer);
		tr.commit();
		closeSession(session);
	}
}

//测试类

public class CustomerManagerImplTest extends TestCase {
    CustomerManagerImpl m=new CustomerManagerImpl();
    public void testAddCustomer() {
        Customer c=new Customer();
        c.setName("死亡骑士");
        c.setAddress("五一九路");
        c.setData(new Date());
        Set img=new HashSet();
        img.add("aaa");
        img.add("bbb");
        img.add("aaa");
        c.setImg(img);
        m.addCustomer(c);
    }

    public void testDelCustomer() {
        m.delCustomer(2);
    }
}

public class CustomerManagerImplTest extends TestCase {	
	CustomerManagerImpl m=new CustomerManagerImpl();
	public void testAddCustomer() {
		Customer c=new Customer();
		c.setName("死亡骑士");
		c.setAddress("五一九路");
		c.setData(new Date());
		Set img=new HashSet();
		img.add("aaa");
		img.add("bbb");
		img.add("aaa");
		c.setImg(img);
		m.addCustomer(c);
	}

	public void testDelCustomer() {
		m.delCustomer(2);
	}
}

数据库中添加aaa、bbb字段，把重复的项去了。
List映射
将Customer.java中img注释改成如下

/**
 * @hibernate.list
 * table="T_Img"
 * @hibernate.key
 *  column="cid"
 * @hibernate.list-index
 *  column="ind"
 * @hibernate.element
 *  type="string"
 *  column="name"
 */
private List img;

	/**
	 * @hibernate.list 
	 * table="T_Img"
	 * @hibernate.key
	 *  column="cid"
	 * @hibernate.list-index
	 * 	column="ind"
	 * @hibernate.element
	 *  type="string"
	 *  column="name"
	 */
	private List img;

在Img.java中添加一个索引字段ind

/**
 * @hibernate.property
 * column="ind"
 */
private int ind;

	/**
	 * @hibernate.property
	 * column="ind"
	 */
	private int ind;

OK其它都和Set一样
数据库中添加aaa、bbb、aaa字段。充许添加重复项。

Map映射
和Set差不多，只是加了一个index项作为map的key
Customer.java改动

/**
 * @hibernate.map
 * table="T_Img"
 * @hibernate.key
 *  column="cid"
 * @hibernate.index
 *  column="imgname"
 *  type="string"
 * @hibernate.element
 *  type="int"
 *  column="size"
 */
private Map img;

	/**
	 * @hibernate.map 
	 * table="T_Img"
	 * @hibernate.key
	 *  column="cid"
	 * @hibernate.index
	 * 	column="imgname"
	 *  type="string"
	 * @hibernate.element
	 *  type="int"
	 *  column="size"
	 */
	private Map img;

Img.java

    /**
     * @hibernate.property
     *  column="imgname"
     */
//键
    private String imgname;
    /**
     * @hibernate.property
     * column="size"
     */
//值
    private int size;

	/**
	 * @hibernate.property
	 * 	column="imgname"
	 */
//键
	private String imgname;
	/**
	 * @hibernate.property
	 * column="size"
	 */
//值
	private int size;

测试：

public void testAddCustomer() {
    Customer c=new Customer();
    c.setName("李白");
    c.setAddress("五一九路");
    c.setData(new Date());
    Map img=new HashMap();
    img.put("img4",32);
    img.put("img5",123);
    img.put("img4",97);
    c.setImg(img);
    m.addCustomer(c);
}

	public void testAddCustomer() {
		Customer c=new Customer();
		c.setName("李白");
		c.setAddress("五一九路");
		c.setData(new Date());
		Map img=new HashMap();
		img.put("img4",32);
		img.put("img5",123);
		img.put("img4",97);
		c.setImg(img);
		m.addCustomer(c);
	}

数据库同样只添加了img4、img5，去除了重复项。