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/////////////////////////////////////////////////////////////////////////
import java.io.Serializable;
import java.util.*;
import java.sql.*;
import org.hibernate.*;
import org.hibernate.cfg.*;
import org.hibernate.criterion.*;
import org.hibernate.event.*;
import org.hibernate.event.def.*;
public class Main {
public static void main(String[] args) throws Exception {
HibernateUtil.setup("create table books(id int, title VARCHAR, author VARCHAR,isbn VARCHAR not null, pagecount int, copyright int, cost numeric(12,2));");
Session session = HibernateUtil.currentSession();
Book book = new Book();
book.setTitle("Title");
book.setIsbn("000000000000000");
book.setAuthor("name");
book.setCopyright(9);
book.setPages(330);
book.setCost(29.99f);
session.save(book);
session.flush();
session.close();
HibernateUtil.checkData("select * from books");
}
}
/////////////////////////////////////////////////////////////////////////
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtil {
public static final SessionFactory sessionFactory;
static {
try {
// Create the SessionFactory from hibernate.cfg.xml
sessionFactory = new Configuration().configure().buildSessionFactory();
} catch (Throwable ex) {
// Make sure you log the exception, as it might be swallowed
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static final ThreadLocal session = new ThreadLocal();
public static Session currentSession() throws HibernateException {
Session s = (Session) session.get();
// Open a new Session, if this thread has none yet
if (s == null) {
s = sessionFactory.openSession();
// Store it in the ThreadLocal variable
session.set(s);
}
return s;
}
public static void closeSession() throws HibernateException {
Session s = (Session) session.get();
if (s != null)
s.close();
session.set(null);
}
static Connection conn;
static Statement st;
public static void setup(String sql) {
try {
// Step 1: Load the JDBC driver.
Class.forName("org.hsqldb.jdbcDriver");
System.out.println("Driver Loaded.");
// Step 2: Establish the connection to the database.
String url = "jdbc:hsqldb:data/tutorial";
conn = DriverManager.getConnection(url, "sa", "");
System.out.println("Got Connection.");
st = conn.createStatement();
st.executeUpdate(sql);
} catch (Exception e) {
System.err.println("Got an exception! ");
e.printStackTrace();
System.exit(0);
}
}
public static void checkData(String sql) {
try {
HibernateUtil.outputResultSet(st
.executeQuery(sql));
// conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void outputResultSet(ResultSet rs) throws Exception{
ResultSetMetaData metadata = rs.getMetaData();
int numcols = metadata.getColumnCount();
String[] labels = new String[numcols];
int[] colwidths = new int[numcols];
int[] colpos = new int[numcols];
int linewidth;
for (int i = 0; i < numcols; i++) {
labels[i] = metadata.getColumnLabel(i + 1); // get its label
System.out.print(labels[i]+" ");
}
System.out.println("------------------------");
while (rs.next()) {
for (int i = 0; i < numcols; i++) {
Object value = rs.getObject(i + 1);
System.out.print(value.toString().trim()+" ");
}
}
}
}
/////////////////////////////////////////////////////////////////////////
<?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>
<!-- Database connection settings -->
<property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
<property name="connection.url">jdbc:hsqldb:data/tutorial</property>
<property name="connection.username">sa</property>
<property name="connection.password"></property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.HSQLDialect</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Mapping files -->
<mapping resource="Book.hbm.xml"/>
</session-factory>
</hibernate-configuration>
/////////////////////////////////////////////////////////////////////////
public class Book{
private int id;
private String title;
private String author;
private String isbn;
private int pages;
private int copyright;
private float cost;
public Book() {
}
public void setId(int i) {
id = i;
}
public int getId() {
return id;
}
public void setTitle(String s) {
title = s;
}
public String getTitle() {
return title;
}
public void setAuthor(String s) {
author = s;
}
public String getAuthor() {
return author;
}
public void setIsbn(String s) {
isbn = s;
}
public String getIsbn() {
return isbn;
}
public void setPages(int i) {
pages = i;
}
public int getPages() {
return pages;
}
public void setCopyright(int i) {
copyright = i;
}
public int getCopyright() {
return copyright;
}
public void setCost(float f) {
cost = f;
}
public float getCost() {
return cost;
}
}
/////////////////////////////////////////////////////////////////////////
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<class name="Book" table="books">
<id name="id" type="int" unsaved-value="0">
<generator class="increment"/>
</id>
<property name="title"/>
<property name="author"/>
<property name="isbn" not-null="true"/>
<property name="pages" type="integer" column="pagecount" />
<property name="copyright"/>
<property name="cost">
<column name="cost" sql-type="NUMERIC(12,2)"/>
</property>
</class>
</hibernate-mapping>
/////////////////////////////////////////////////////////////////////////
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HibernateFloatDataType.zip( 4,577 k)