25hibernate_training_tree
package com.bjsxt.hibernate;
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
public class ExportToDB {
/**
* @param args
*/
public static void main(String[] args) {
// 读取配置文件
Configuration cfg = new Configuration().configure();
// 创建SchemaExport对象
SchemaExport export = new SchemaExport(cfg);
// 创建数据库表
export.create(true, true);
}
}
---------------------------------------------------------------------------
package com.bjsxt.hibernate;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtils {
private static SessionFactory factory;
static {
Configuration cfg = new Configuration().configure();
factory = cfg.buildSessionFactory();
}
public static SessionFactory getSessionFactory() {
return factory;
}
public static Session getSession() {
return factory.openSession();
}
public static void closeSession(Session session) {
if (session != null) {
if (session.isOpen()) {
session.close();
}
}
}
}
---------------------------------------------------------------------------
package com.bjsxt.hibernate;
import java.util.Set;
public class Node {//为了显示缩进
// 标识符
private int id;
// 节点名称
private String name;
// 层次
private int level;
// 是否叶子节点
private boolean leaf;//考虑到效率，如果是叶子，我们就不用递归了
// 父节点 * --- 模拟1方
private Node parent;
// 子节点 1 --- *模拟多方
private Set children;
public Set getChildren() {
return children;
}
public void setChildren(Set children) {
this.children = children;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public boolean isLeaf() {
return leaf;
}
public void setLeaf(boolean leaf) {
this.leaf = leaf;
}
public int getLevel() {
return level;
}
public void setLevel(int level) {
this.level = level;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Node getParent() {
return parent;
}
public void setParent(Node parent) {
this.parent = parent;
}
}
---------------------------------------------------------------------------
package com.bjsxt.hibernate;
import java.io.File;
import java.util.Iterator;
import java.util.Set;
import org.hibernate.Session;
public class NodeManager {
private static NodeManager nodeManager;
private NodeManager() {
}
public static synchronized NodeManager getInstance() {
if (nodeManager == null) {
nodeManager = new NodeManager();
}
return nodeManager;
}
// 创建树型结构
public void createTree(String dir) {
Session session = HibernateUtils.getSession();
try {
session.beginTransaction();
File root = new File(dir);
saveTree(root, session, null, 0);// 第一个Node的parent为null,所以每三个参数为null
session.getTransaction().commit();
} catch (RuntimeException e) {
e.printStackTrace();
session.getTransaction().rollback();
} finally {
HibernateUtils.closeSession(session);
}
}
// 递归创建一棵树
private void saveTree(File file, Session session, Node parent, int level) {
if (file == null || !file.exists()) {
return;
}
boolean isLeaf = file.isFile();
Node node = new Node();
node.setName(file.getName());
node.setLevel(level);
node.setParent(parent);
node.setLeaf(isLeaf);
session.save(node);
File[] subs = file.listFiles();
if (subs != null && subs.length > 0) {
for (int i = 0; i < subs.length; i++) {
saveTree(subs[i], session, node, level + 1);
}
}
}
public void printTree(int id) {
Session session = HibernateUtils.getSession();
try {
session.beginTransaction();
Node root = (Node) session.load(Node.class, id);
printNode(root);//从根节点开始，依次打印出所有的节点
session.getTransaction().commit();
} catch (RuntimeException e) {
e.printStackTrace();
session.getTransaction().rollback();
} finally {
HibernateUtils.closeSession(session);
}
}
//格式化输出每个节点
private void printNode(Node node) {
if (node == null) {
return;
}
int level = node.getLevel();
if (level > 0) {
for (int i = 0; i < level; i++) {
System.out.print(" |");
}
System.out.print("--");
}
//如果是叶子节点(也就是说当前节点为文件)打印空，如果不是(也就是说当前节点为文件夹)则打印它包含的文件数
System.out.println(node.getName()
+ (node.isLeaf() ? "" : "[" + node.getChildren().size() + "]"));
Set children = node.getChildren();
//循环初始值；根据迭代器遍历
for (Iterator iter = children.iterator(); iter.hasNext();) {
Node child = (Node) iter.next();
printNode(child);
}
}
}
---------------------------------------------------------------------------
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.bjsxt.hibernate.Node" table="t_node">
<id name="id">
<generator class="native"/>
</id>
<property name="name"/>
<property name="level"/>
<property name="leaf"/>
<!--自关联
pid reforeign key (pid) references t_node (id)
-->
<many-to-one name="parent" column="pid"/>
<set name="children" lazy="extra" inverse="true">
<key column="pid"/>
<one-to-many class="com.bjsxt.hibernate.Node"/>
</set>
</class>
</hibernate-mapping>
---------------------------------------------------------------------------
package com.bjsxt.hibernate;
import junit.framework.TestCase;
public class NodeManagerTest extends TestCase {
public void testCreateTree() {
//E:\workspaceforjee\25hibernate_training_tree
NodeManager.getInstance().createTree("E:\\workspaceforjee\\25hibernate_training_tree\\");
}
public void testPrintTree() {
NodeManager.getInstance().printTree(1);
}
}
---------------------------------------------------------------------------
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration
PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.url">jdbc:mysql://127.0.0.1/25hibernate_training_tree</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!--
<property name="hibernate.show_sql">true</property>
-->
<mapping resource="com/bjsxt/hibernate/Node.hbm.xml"/>
</session-factory>
</hibernate-configuration>
---------------------------------------------------------------------------
ExportDB:
create table t_node (id integer not null auto_increment, name varchar(255), level integer, leaf bit, pid integer, primary key (id))
alter table t_node add index FKCB608EED3F93ED7D (pid), add constraint FKCB608EED3F93ED7D foreign key (pid) references t_node (id)
mysql> create database 25hibernate_training_tree;
Query OK, 1 row affected (0.03 sec)
mysql> use 25hibernate_training_tree;
Database changed
mysql> show tables;
+-------------------------------------+
| Tables_in_25hibernate_training_tree |
+-------------------------------------+
| t_node |
+-------------------------------------+
1 row in set (0.00 sec)
mysql> select * from t_node;
Empty set (0.00 sec)
mysql> desc t_node;
+-------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| level | int(11) | YES | | NULL | |
| leaf | bit(1) | YES | | NULL | |
| pid | int(11) | YES | MUL | NULL | |
+-------+--------------+------+-----+---------+----------------+
5 rows in set (0.06 sec)
//NodeManager.getInstance().printTree(1);
25hibernate_training_tree[8]
|--readme.txt
|--.classpath
|--src[3]
| |--com[1]
| | |--bjsxt[1]
| | | |--hibernate[6]
| | | | |--NodeManagerTest.java
| | | | |--ExportToDB.java
| | | | |--Node.hbm.xml
| | | | |--NodeManager.java
| | | | |--Node.java
| | | | |--HibernateUtils.java
| |--log4j.properties
| |--hibernate.cfg.xml
|--readme.doc
|--~$readme.doc
|--~WRL0004.tmp
|--.project
|--bin[3]
| |--hibernate.cfg.xml
| |--log4j.properties
| |--com[1]
| | |--bjsxt[1]
| | | |--hibernate[6]
| | | | |--Node.class
| | | | |--HibernateUtils.class
| | | | |--ExportToDB.class
| | | | |--NodeManager.class
| | | | |--Node.hbm.xml
| | | | |--NodeManagerTest.class
mysql> select * from t_node;
+----+---------------------------+-------+------+------+
| id | name | level | leaf | pid |
+----+---------------------------+-------+------+------+
| 1 | 25hibernate_training_tree | 0 | | NULL |
| 2 | .classpath | 1 | | 1 |
| 3 | .project | 1 | | 1 |
| 4 | bin | 1 | | 1 |
| 5 | com | 2 | | 4 |
| 6 | bjsxt | 3 | | 5 |
| 7 | hibernate | 4 | | 6 |
| 8 | ExportToDB.class | 5 | | 7 |
| 9 | HibernateUtils.class | 5 | | 7 |
| 10 | Node.class | 5 | | 7 |
| 11 | Node.hbm.xml | 5 | | 7 |
| 12 | NodeManager.class | 5 | | 7 |
| 13 | NodeManagerTest.class | 5 | | 7 |
| 14 | hibernate.cfg.xml | 2 | | 4 |
| 15 | log4j.properties | 2 | | 4 |
| 16 | readme.doc | 1 | | 1 |
| 17 | readme.txt | 1 | | 1 |
| 18 | src | 1 | | 1 |
| 19 | com | 2 | | 18 |
| 20 | bjsxt | 3 | | 19 |
| 21 | hibernate | 4 | | 20 |
| 22 | ExportToDB.java | 5 | | 21 |
| 23 | HibernateUtils.java | 5 | | 21 |
| 24 | Node.hbm.xml | 5 | | 21 |
| 25 | Node.java | 5 | | 21 |
| 26 | NodeManager.java | 5 | | 21 |
| 27 | NodeManagerTest.java | 5 | | 21 |
| 28 | hibernate.cfg.xml | 2 | | 18 |
| 29 | log4j.properties | 2 | | 18 |
+----+---------------------------+-------+------+------+
29 rows in set (0.00 sec)
//NodeManager.getInstance().printTree(4);
|--bin[3]
| |--hibernate.cfg.xml
| |--com[1]
| | |--bjsxt[1]
| | | |--hibernate[6]
| | | | |--HibernateUtils.class
| | | | |--ExportToDB.class
| | | | |--NodeManager.class
| | | | |--Node.hbm.xml
| | | | |--NodeManagerTest.class
| | | | |--Node.class
| |--log4j.properties
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
public class ExportToDB {
/**
* @param args
*/
public static void main(String[] args) {
// 读取配置文件
Configuration cfg = new Configuration().configure();
// 创建SchemaExport对象
SchemaExport export = new SchemaExport(cfg);
// 创建数据库表
export.create(true, true);
}
}
---------------------------------------------------------------------------
package com.bjsxt.hibernate;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtils {
private static SessionFactory factory;
static {
Configuration cfg = new Configuration().configure();
factory = cfg.buildSessionFactory();
}
public static SessionFactory getSessionFactory() {
return factory;
}
public static Session getSession() {
return factory.openSession();
}
public static void closeSession(Session session) {
if (session != null) {
if (session.isOpen()) {
session.close();
}
}
}
}
---------------------------------------------------------------------------
package com.bjsxt.hibernate;
import java.util.Set;
public class Node {//为了显示缩进
// 标识符
private int id;
// 节点名称
private String name;
// 层次
private int level;
// 是否叶子节点
private boolean leaf;//考虑到效率，如果是叶子，我们就不用递归了
// 父节点 * --- 模拟1方
private Node parent;
// 子节点 1 --- *模拟多方
private Set children;
public Set getChildren() {
return children;
}
public void setChildren(Set children) {
this.children = children;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public boolean isLeaf() {
return leaf;
}
public void setLeaf(boolean leaf) {
this.leaf = leaf;
}
public int getLevel() {
return level;
}
public void setLevel(int level) {
this.level = level;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Node getParent() {
return parent;
}
public void setParent(Node parent) {
this.parent = parent;
}
}
---------------------------------------------------------------------------
package com.bjsxt.hibernate;
import java.io.File;
import java.util.Iterator;
import java.util.Set;
import org.hibernate.Session;
public class NodeManager {
private static NodeManager nodeManager;
private NodeManager() {
}
public static synchronized NodeManager getInstance() {
if (nodeManager == null) {
nodeManager = new NodeManager();
}
return nodeManager;
}
// 创建树型结构
public void createTree(String dir) {
Session session = HibernateUtils.getSession();
try {
session.beginTransaction();
File root = new File(dir);
saveTree(root, session, null, 0);// 第一个Node的parent为null,所以每三个参数为null
session.getTransaction().commit();
} catch (RuntimeException e) {
e.printStackTrace();
session.getTransaction().rollback();
} finally {
HibernateUtils.closeSession(session);
}
}
// 递归创建一棵树
private void saveTree(File file, Session session, Node parent, int level) {
if (file == null || !file.exists()) {
return;
}
boolean isLeaf = file.isFile();
Node node = new Node();
node.setName(file.getName());
node.setLevel(level);
node.setParent(parent);
node.setLeaf(isLeaf);
session.save(node);
File[] subs = file.listFiles();
if (subs != null && subs.length > 0) {
for (int i = 0; i < subs.length; i++) {
saveTree(subs[i], session, node, level + 1);
}
}
}
public void printTree(int id) {
Session session = HibernateUtils.getSession();
try {
session.beginTransaction();
Node root = (Node) session.load(Node.class, id);
printNode(root);//从根节点开始，依次打印出所有的节点
session.getTransaction().commit();
} catch (RuntimeException e) {
e.printStackTrace();
session.getTransaction().rollback();
} finally {
HibernateUtils.closeSession(session);
}
}
//格式化输出每个节点
private void printNode(Node node) {
if (node == null) {
return;
}
int level = node.getLevel();
if (level > 0) {
for (int i = 0; i < level; i++) {
System.out.print(" |");
}
System.out.print("--");
}
//如果是叶子节点(也就是说当前节点为文件)打印空，如果不是(也就是说当前节点为文件夹)则打印它包含的文件数
System.out.println(node.getName()
+ (node.isLeaf() ? "" : "[" + node.getChildren().size() + "]"));
Set children = node.getChildren();
//循环初始值；根据迭代器遍历
for (Iterator iter = children.iterator(); iter.hasNext();) {
Node child = (Node) iter.next();
printNode(child);
}
}
}
---------------------------------------------------------------------------
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.bjsxt.hibernate.Node" table="t_node">
<id name="id">
<generator class="native"/>
</id>
<property name="name"/>
<property name="level"/>
<property name="leaf"/>
<!--自关联
pid reforeign key (pid) references t_node (id)
-->
<many-to-one name="parent" column="pid"/>
<set name="children" lazy="extra" inverse="true">
<key column="pid"/>
<one-to-many class="com.bjsxt.hibernate.Node"/>
</set>
</class>
</hibernate-mapping>
---------------------------------------------------------------------------
package com.bjsxt.hibernate;
import junit.framework.TestCase;
public class NodeManagerTest extends TestCase {
public void testCreateTree() {
//E:\workspaceforjee\25hibernate_training_tree
NodeManager.getInstance().createTree("E:\\workspaceforjee\\25hibernate_training_tree\\");
}
public void testPrintTree() {
NodeManager.getInstance().printTree(1);
}
}
---------------------------------------------------------------------------
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration
PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.url">jdbc:mysql://127.0.0.1/25hibernate_training_tree</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!--
<property name="hibernate.show_sql">true</property>
-->
<mapping resource="com/bjsxt/hibernate/Node.hbm.xml"/>
</session-factory>
</hibernate-configuration>
---------------------------------------------------------------------------
ExportDB:
create table t_node (id integer not null auto_increment, name varchar(255), level integer, leaf bit, pid integer, primary key (id))
alter table t_node add index FKCB608EED3F93ED7D (pid), add constraint FKCB608EED3F93ED7D foreign key (pid) references t_node (id)
mysql> create database 25hibernate_training_tree;
Query OK, 1 row affected (0.03 sec)
mysql> use 25hibernate_training_tree;
Database changed
mysql> show tables;
+-------------------------------------+
| Tables_in_25hibernate_training_tree |
+-------------------------------------+
| t_node |
+-------------------------------------+
1 row in set (0.00 sec)
mysql> select * from t_node;
Empty set (0.00 sec)
mysql> desc t_node;
+-------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| level | int(11) | YES | | NULL | |
| leaf | bit(1) | YES | | NULL | |
| pid | int(11) | YES | MUL | NULL | |
+-------+--------------+------+-----+---------+----------------+
5 rows in set (0.06 sec)
//NodeManager.getInstance().printTree(1);
25hibernate_training_tree[8]
|--readme.txt
|--.classpath
|--src[3]
| |--com[1]
| | |--bjsxt[1]
| | | |--hibernate[6]
| | | | |--NodeManagerTest.java
| | | | |--ExportToDB.java
| | | | |--Node.hbm.xml
| | | | |--NodeManager.java
| | | | |--Node.java
| | | | |--HibernateUtils.java
| |--log4j.properties
| |--hibernate.cfg.xml
|--readme.doc
|--~$readme.doc
|--~WRL0004.tmp
|--.project
|--bin[3]
| |--hibernate.cfg.xml
| |--log4j.properties
| |--com[1]
| | |--bjsxt[1]
| | | |--hibernate[6]
| | | | |--Node.class
| | | | |--HibernateUtils.class
| | | | |--ExportToDB.class
| | | | |--NodeManager.class
| | | | |--Node.hbm.xml
| | | | |--NodeManagerTest.class
mysql> select * from t_node;
+----+---------------------------+-------+------+------+
| id | name | level | leaf | pid |
+----+---------------------------+-------+------+------+
| 1 | 25hibernate_training_tree | 0 | | NULL |
| 2 | .classpath | 1 | | 1 |
| 3 | .project | 1 | | 1 |
| 4 | bin | 1 | | 1 |
| 5 | com | 2 | | 4 |
| 6 | bjsxt | 3 | | 5 |
| 7 | hibernate | 4 | | 6 |
| 8 | ExportToDB.class | 5 | | 7 |
| 9 | HibernateUtils.class | 5 | | 7 |
| 10 | Node.class | 5 | | 7 |
| 11 | Node.hbm.xml | 5 | | 7 |
| 12 | NodeManager.class | 5 | | 7 |
| 13 | NodeManagerTest.class | 5 | | 7 |
| 14 | hibernate.cfg.xml | 2 | | 4 |
| 15 | log4j.properties | 2 | | 4 |
| 16 | readme.doc | 1 | | 1 |
| 17 | readme.txt | 1 | | 1 |
| 18 | src | 1 | | 1 |
| 19 | com | 2 | | 18 |
| 20 | bjsxt | 3 | | 19 |
| 21 | hibernate | 4 | | 20 |
| 22 | ExportToDB.java | 5 | | 21 |
| 23 | HibernateUtils.java | 5 | | 21 |
| 24 | Node.hbm.xml | 5 | | 21 |
| 25 | Node.java | 5 | | 21 |
| 26 | NodeManager.java | 5 | | 21 |
| 27 | NodeManagerTest.java | 5 | | 21 |
| 28 | hibernate.cfg.xml | 2 | | 18 |
| 29 | log4j.properties | 2 | | 18 |
+----+---------------------------+-------+------+------+
29 rows in set (0.00 sec)
//NodeManager.getInstance().printTree(4);
|--bin[3]
| |--hibernate.cfg.xml
| |--com[1]
| | |--bjsxt[1]
| | | |--hibernate[6]
| | | | |--HibernateUtils.class
| | | | |--ExportToDB.class
| | | | |--NodeManager.class
| | | | |--Node.hbm.xml
| | | | |--NodeManagerTest.class
| | | | |--Node.class
| |--log4j.properties
