∪∩deniable Design

關(guān)于如何配置請(qǐng)參看:Hibernate學(xué)習(xí)筆記(一)--用MyEclipse 6.5+MySQL 5.0的環(huán)境跑起來(lái)

準(zhǔn)備:建表

用MySQL在名為STMS數(shù)據(jù)庫(kù)中建表Titems

 src/org.lxh.hibernate4.TItems.java

 1package org.lxh.hibernate4;
 2/** *//** 
 3 * @author ∪∩BUG E-mail: tidelgl@163.com
 4 * @version Aug 31, 2008 3:27:51 PM 
 5 * @父類
 6 */
 7public class TItems {
 8
 9    private String id;
10    private String name;
11    private String manufacturer;
12
13    public String getId() {
14        return id;
15    }
16
17    public void setId(String id) {
18        this.id = id;
19    }
20
21    public String getName() {
22        return name;
23    }
24
25    public void setName(String name) {
26        this.name = name;
27    }
28
29    public String getManufacturer() {
30        return manufacturer;
31    }
32
33    public void setManufacturer(String manufacturer) {
34        this.manufacturer = manufacturer;
35    }
36
37}
38

 src/org.lxh.hibernate4.TDvds.java

 1package org.lxh.hibernate4;
 2/** *//** 
 3 * @author ∪∩BUG E-mail: tidelgl@163.com
 4 * @version Aug 31, 2008 3:34:06 PM 
 5 * @　繼承父類TItems
 6 */
 7public class TDvds extends TItems {
 8
 9    private String regionCode;
10
11    public String getRegionCode() {
12        return regionCode;
13    }
14
15    public void setRegionCode(String regionCode) {
16        this.regionCode = regionCode;
17    }
18
19}
20

 src/org.lxh.hibernate4.TBooks.java

 1package org.lxh.hibernate4;
 2
 3/** *//**
 4 * @author ∪∩BUG E-mail: tidelgl@163.com
 5 * @version Aug 31, 2008 3:31:47 PM 
 6 * @ 繼承父類TItems
 7 */
 8public class TBooks extends TItems {
 9
10    private int pageCount;
11
12    public int getPageCount() {
13        return pageCount;
14    }
15
16    public void setPageCount(int pageCount) {
17        this.pageCount = pageCount;
18    }
19}
20

 src/org.lxh.hibernate4.Titems.hbm.xml

 1xml version="1.0" encoding="utf-8"?>
 2DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 3"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 4
 7<hibernate-mapping>
 8    <class name="org.lxh.hibernate4.TItems" table="titems"
 9        catalog="stms">
10        <id name="id" type="java.lang.String">
11            <column name="id" length="32" />
12            <generator class="assigned" />
13        id>
14        <property name="name" type="java.lang.String">
15            <column name="name" length="20" not-null="true" />
16        property>
17        <property name="manufacturer" type="java.lang.String">
18            <column name="manufacturer" length="20" not-null="true" />
19        property>
20        
21        
27        <discriminator type="string" column="category">discriminator>
28        <subclass name="org.lxh.hibernate4.TBooks"
29            discriminator-value="1">
30            <property name="pageCount" type="java.lang.Integer">
31                <column name="pageCount" />
32            property>
33        subclass>
34        <subclass name="org.lxh.hibernate4.TDvds"
35            discriminator-value="2">
36            <property name="regionCode" type="java.lang.String">
37                <column name="regionCode" length="2" />
38            property>
39        subclass>
40    class>
41hibernate-mapping>
42

 src/hibernate.cfg.xml

 1xml version='1.0' encoding='UTF-8'?>
 2DOCTYPE hibernate-configuration PUBLIC
 3          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 4          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
 5
 6
 7<hibernate-configuration>
 8
 9<session-factory>
10    <property name="connection.username">rootproperty>
11    <property name="connection.url">
12        jdbc:mysql://localhost:3306/STMS
13    property>
14    <property name="dialect">
15        org.hibernate.dialect.MySQLDialect
16    property>
17    <property name="myeclipse.connection.profile">
18        MySql_localhost
19    property>
20    <property name="connection.password">rootproperty>
21    <property name="connection.driver_class">
22        com.mysql.jdbc.Driver
23    property>
24    <property name="show_sql">trueproperty>
25
26    
27    <mapping resource="org/lxh/hibernate4/Titems.hbm.xml" />
28
29session-factory>
30
31hibernate-configuration>

 src/org.lxh.hibernate4.TItemsOperate.java

 1package org.lxh.hibernate4;
 2
 3import java.util.Iterator;
 4
 5import org.hibernate.Query;
 6import org.hibernate.Session;
 7import org.hibernate.SessionFactory;
 8import org.hibernate.cfg.Configuration;
 9
10/** *//** 
11 * @author ∪∩BUG E-mail: tidelgl@163.com
12 * @version Aug 31, 2008 4:08:14 PM 
13 * @具體操作Hibernate類
14 */
15public class TItemsOperate {
16    private Session session;
17
18    public TItemsOperate() {
19        //找到Hibernate配置文件
20        Configuration config = new Configuration().configure();
21        
22        //從全局文件中取出SessionFactory
23        SessionFactory factory = config.buildSessionFactory();
24        
25        //從SessionFactory取出一個(gè)session
26        this.session = factory.openSession();
27    }
28
29    //插入操作
30    //TBook和TDvd類都是TItem的子類,所以只需往TItem里插入就可以了.
31    public void insert(TItems item) {
32        //執(zhí)行語(yǔ)句
33        this.session.save(item);
34        
35        //開始事務(wù).提交事務(wù)
36        this.session.beginTransaction().commit();
37        this.session.close();
38    }
39    
40    //查詢操作
41    //TBooks和TDvds類都是TItems的子類,所以只需查詢TItem的ID就可以了.
42    public TItems QueryById(String id) {
43        TItems item = new TItems();
44        String hql = "FROM TItems as t WHERE t.id=?";
45        Query q = this.session.createQuery(hql);
46        q.setString(0, id);
47        Iterator iter = q.list().iterator();
48        if(iter.hasNext()){
49            item = (TItems)iter.next();
50        }
51        return item;
52    }
53}
54

 src/org.lxh.hibernate4.Test.java

 1package org.lxh.hibernate4;
 2
 3import java.awt.print.Book;
 4
 5/** *//** 
 6 * @author ∪∩BUG E-mail: tidelgl@163.com
 7 * @version Aug 31, 2008 10:52:25 PM 
 8 * 類說(shuō)明 
 9 */
10public class Test {
11
12    public static void main(String[] args) {
13        
14        TItemsOperate to = new TItemsOperate();
15        
16        //插入數(shù)據(jù)
17        TBooks books = new TBooks();
18        books.setId("03");
19        books.setManufacturer("Apache.org");
20        books.setName("Struts");
21        books.setPageCount(10);
22        
23        to.insert(books);
24
25//        TDvds dvds = new TDvds();
26//        dvds.setId("02");
27//        dvds.setManufacturer("MySQL.com");
28//        dvds.setName("MySQL");
29//        dvds.setRegionCode("31");
30//        
31//        to.insert(dvds);
32        
33        //查詢操作
34//        TBooks books = (TBooks)to.QueryById("01");
35//        System.out.println(books.getName());
36    }
37
38}
39

例子結(jié)構(gòu):