（1）生成数据库表的创建：
1 // 默认读取hibernate.cfg.xml文件 2 Configuration cfg = new Configuration().configure(); 3 4 // 生成并输出sql到文件（当前目录）和数据库 5 SchemaExport export = new SchemaExport(cfg); 6 7 // 创建表结构，第一个true 表示在控制台打印sql语句，第二个true 表示导入sql语句到数据库 8 export.create(true, true);
(2)Hibernate.cfg.xml文件
1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE hibernate-configuration PUBLIC 3 "-//Hibernate/Hibernate Configuration DTD 3.0//EN" 4 "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> 5 6 <hibernate-configuration> 7 <session-factory> 8 <!-- 必须去配置的属性 --> 9 <!-- 配置数据库连接的基本信息: --> 10 <property name="hibernate.connection.driver_class"> 11 com.mysql.jdbc.Driver 12 </property> 13 <property name="hibernate.connection.url"> 14 jdbc:mysql:///hibernate 15 </property> 16 <property name="hibernate.connection.username">root</property> 17 <property name="hibernate.connection.password">123456</property> 18 <!-- Hibernate的方言 --> 19 <!-- 生成底层SQL不同的 --> 20 <property name="hibernate.dialect"> 21 org.hibernate.dialect.MySQLDialect 22 </property> 23 24 <!-- 可选的属性 --> 25 <!-- 显示SQL --> 26 <property name="hibernate.show_sql">true</property> 27 <!-- 格式化SQL --> 28 <property name="hibernate.format_sql">true</property> 29 <!-- hbm:映射 to DDL: create drop alter --> 30 <property name="hibernate.hbm2ddl.auto">update</property> 31 32 33 <!-- 通知Hibernate加载那些映射文件 --> 34 <mapping resource="cn/lonecloud/domain/User.hbm.xml" /> 35 <mapping resource="cn/lonecloud/domain/Customer.hbm.xml" /> 36 <mapping resource="cn/lonecloud/domain/Order.hbm.xml" /> 37 38 </session-factory> 39 </hibernate-configuration>
(3)log4j.properties文件
1 ### direct log messages to stdout ###
2 log4j.appender.stdout=org.apache.log4j.ConsoleAppender
3 log4j.appender.stdout.Target=System.err
4 log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
5 log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
6
7 ### direct messages to file mylog.log ###
8 log4j.appender.file=org.apache.log4j.FileAppender
9 log4j.appender.file.File=c\:mylog.log
10 log4j.appender.file.layout=org.apache.log4j.PatternLayout
11 log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
12
13 ### set log levels - for more verbose logging change ‘info‘ to ‘debug‘ ###
14
15 log4j.rootLogger=off, stdout
（4）User.java
1 package cn.lonecloud.domain;
2
3 import java.io.Serializable;
4 import java.lang.reflect.Field;
5 import java.lang.reflect.Method;
6 import java.util.Date;
7
8 public class User implements Serializable,Cloneable {
9
10 private String id;
11 private String name;
12 private String password;
13 private Date birthday;
14 public User(){
15 System.out.println("user");
16 }
17 public String getId() {
18 return id;
19 }
20 public void setId(String id) {
21 this.id = id;
22 }
23 public String getName() {
24 return name;
25 }
26 public void setName(String name) {
27 this.name = name;
28 }
29 public String getPassword() {
30 return password;
31
32 }
33 public void setPassword(String password) {
34 this.password = password;
35 }
36 public Date getBirthday() {
37 return birthday;
38 }
39 public void setBirthday(Date birthday) {
40 this.birthday = birthday;
41 }
42 @Override
43 public Object clone() throws CloneNotSupportedException {
44 Class clazz = User.class;
45 User user =null;
46 try {
47 user = (User)clazz.newInstance();
48 /*user.setBirthday(this.birthday);
49 user.setId(this.id);
50 user.setPassword(this.password);
51 user.setName(this.name);*/
52 Field[] declaredFields = clazz.getDeclaredFields();
53 for(Field field :declaredFields){
54 Class<?> parameterTypes = field.getType();
55 String fieldName = field.getName();
56 String methodName = "set"+fieldName.substring(0,1).toUpperCase()+field.getName().substring(1);
57 Method method = clazz.getDeclaredMethod(methodName, parameterTypes);
58 field.setAccessible(true);
59 method.invoke(user,field.get(this));
60 }
61 return user;
62 } catch (Exception e) {
63 e.printStackTrace();
64 }
65 return null;
66 }
67
68
69 }
(5).user.hbm.xml
1 <?xml version="1.0"?> 2 <!DOCTYPE hibernate-mapping PUBLIC 3 "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 4 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 5 <hibernate-mapping package="cn.lonecloud.domain" > 6 <class name="User" table="t_user" select-before-update="false"> 7 <!--hibernate为我们生成主键id--> 8 <id name="id"> 9 <generator class="uuid" /> 10 </id> 11 12 <!--默认把类的变量映射为相同名字的表列，当然我们使用column属性修改表字段--> 13 <property name="name" column="names"></property> 14 <property name="password"></property> 15 <property name="birthday" type="date"></property> <!--当为日期类型的时候标明date类型--> 16 17 </class> 18 </hibernate-mapping>
6.Customer.java
1 package cn.lonecloud.domain;
2
3 import java.io.Serializable;
4 import java.util.HashSet;
5 import java.util.Set;
6
7 public class Customer implements Serializable {
8
9 private String id;
10
11 private String customerName;
12
13 private Set<Order> orders = new HashSet<Order>();
14
15 public String getId() {
16 return id;
17 }
18
19 public void setId(String id) {
20 this.id = id;
21 }
22
23 public String getCustomerName() {
24 return customerName;
25 }
26
27 public void setCustomerName(String customerName) {
28 this.customerName = customerName;
29 }
30
31 public Set<Order> getOrders() {
32 return orders;
33 }
34
35 public void setOrders(Set<Order> orders) {
36 this.orders = orders;
37 }
38
39
40 }
7.Customer.hbm.xml
1 <?xml version="1.0"?> 2 <!DOCTYPE hibernate-mapping PUBLIC 3 "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 4 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 5 <hibernate-mapping package="cn.lonecloud.domain" > 6 <class name="Customer" table="t_customer" lazy="true"> 7 <!--hibernate为我们生成主键id--> 8 <id name="id"> 9 <generator class="uuid" /> 10 </id> 11 12 <!--默认把类的变量映射为相同名字的表列，当然我们使用column属性修改表字段--> 13 <property name="customerName" column="customerName"></property> 14 <set name="orders" lazy="extra" fetch="join" cascade="all-delete-orphan"> <!-- lazy fetch --> 15 <key column="customer_id"></key> 16 <one-to-many class="cn.lonecloud.domain.Order"/> 17 </set> 18 19 </class> 20 </hibernate-mapping>
8.Order.java
1 package cn.lonecloud.domain;
2
3 import java.io.Serializable;
4
5 public class Order implements Serializable{
6
7 private String id;
8
9 private String orderNumber;
10
11 private float price;
12
13 private Customer customer;
14
15
16 public Customer getCustomer() {
17 return customer;
18 }
19
20 public void setCustomer(Customer customer) {
21 this.customer = customer;
22 }
23
24 public String getId() {
25 return id;
26 }
27
28 public void setId(String id) {
29 this.id = id;
30 }
31
32 public String getOrderNumber() {
33 return orderNumber;
34 }
35
36 public void setOrderNumber(String orderNumber) {
37 this.orderNumber = orderNumber;
38 }
39
40 public float getPrice() {
41 return price;
42 }
43
44 public void setPrice(float price) {
45 this.price = price;
46 }
47
48
49
50
51
52 }
9.Order.hbm.xml
1 <?xml version="1.0"?> 2 <!DOCTYPE hibernate-mapping PUBLIC 3 "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 4 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 5 <hibernate-mapping package="cn.lonecloud.domain" > 6 <class name="Order" table="t_order" > 7 <!--hibernate为我们生成主键id--> 8 <id name="id"> 9 <generator class="uuid" /> 10 </id> 11 12 <!--默认把类的变量映射为相同名字的表列，当然我们使用column属性修改表字段--> 13 <property name="orderNumber" column="orderNumber"></property> 14 <property name="price" column="price"></property> 15 <many-to-one name="customer" class="cn.lonecloud.domain.Customer"> 16 <column name="customer_id"/> 17 </many-to-one> 18 </class> 19 </hibernate-mapping>
时间： 2024-10-18 14:29:06