我的第一次冬眠practice

2023-09-15 21:23:37 墨初知识笔记 32阅读

休眠3.1 阿尔法1 MySQL 4.1 JDK 1 . 5 . 00041目录结构My1stHibernate - build.xml lib所需要的库：asm.jar，cglib-2.1.1.jar，commons-collections-2.1.1.jar，commons-logging-1.0.4.jar，dom4j-1.6.jar，ehcache-1.1.jar，hibernate3.jar，jta.jar，log4j-1.2.9.jar，MySQL-connector-Java-3 .1 .10箱jar src-客户。Java-客户hbm。XML-Test.java-hibernate。CFG。XML-XML一个往数据库中存储客户信息的简单程序客户实体类顾客javapublicclasscustomer { private intid；privateStringusernameprivateStringpasswordpublicintgetId()(128，128，128，1)；显示：无；background-color: rgba(255，255，255，1)' { returnid；} publicvidsetid(intid){ this。id=id} publicStringgetPassword(){返回密码；}酒吧

lic void setPassword(String password)
    {
        this.password=password;
    }

    public String getUsername()
    {
        return username;
    }

    public void setUsername(String username)
    {
        this.username=username;
    }
}

客户实体类对应的Hibernate映射文件
<Customer.hbm.xml>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" "">
<hibernate-mapping>
<class name="Customer" table="CUSTOMER">
    <id name="id" column="CID">
        <generator class="increment"/>
    </id>
    <property name="username" column="USERNAME"/>
    <property name="password" column="PASSWORD"/>
</class>
</hibernate-mapping>

测试类
<Test.java>

import org.hibernate.*;
import org.hibernate.cfg.*;

public class Test
{
    public static void main(String[] args)
    {
        try
        {
            SessionFactory sf=new Configuration().configure().buildSessionFactory();
            Session session=sf.openSession();
            Transaction tx=session.beginTransaction();
            for(int i=0; i<10; i++)
            {
                Customer customer=new Customer();
                customer.setUsername("customer" + i);
                customer.setPassword("customer");
                session.save(customer);
            }
            tx.commit();
            session.close();
        }
        catch(HibernateException e)
        {
            e.printStackTrace();
        }
    }
}

Hibernate的配置文件
<hibernate.cfg.xml>

<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
"">
<hibernate-configuration>
    <session-factory name="java:/hibernate/HibernateFactory">
        <property name="show_sql">true</property>
        <property name="connection.driver_class">
            org.gjt.mm.mysql.Driver
        </property>
        <property name="connection.url">
            jdbc:mysql://localhost:3306/test
        </property>
        <property name="connection.username">
            root
        </property>
        <property name="connection.password">
            root
        </property>
        <property name="dialect">
            org.hibernate.dialect.MySQLDialect
        </property>
        <mapping resource="Customer.hbm.xml" />
    </session-factory>
</hibernate-configuration>

3. 建立数据库
在MySQL中建立一个名为test的数据库, 再在test中建一个表customer:

CREATE TABLE CUSTOMER
(
　CID INTEGER NOT NULL PRIMARY KEY, USERNAME VARCHAR(12) NOT NULL, PASSWORD VARCHAR(12)
);

4. 还要增加一个文件
<log4j.properties>

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### direct messages to
#log4j.appender.
#log4j.appender.
#log4j.appender.
#log4j.appender.{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=warn, stdout

log4j.logger.org.hibernate=info
#log4j.logger.org.hibernate=debug

### log HQL query parser activity
#log4j.logger.org.hibernate.hql.ast.AST=debug

### log just the SQL
#log4j.logger.org.hibernate.SQL=debug

### log JDBC bind parameters ###
log4j.logger.org.hibernate.type=info
#log4j.logger.org.hibernate.type=debug

### log schema export/update ###
log4j.logger.org.hibernate.tool.hbm2ddl=debug

### log HQL parse trees
#log4j.logger.org.hibernate.hql=debug

### log cache activity ###
#log4j.logger.org.hibernate.cache=debug

### log transaction activity
#log4j.logger.org.hibernate.transaction=debug

### log JDBC resource acquisition
#log4j.logger.org.hibernate.jdbc=debug

### enable the following line if you want to track down connection ###
### leakages when using DriverManagerConnectionProvider ###
#log4j.logger.org.hibernate.connection.DriverManagerConnectionProvider=trace

5. 最后便是编写build文件用以ant编译运行

<?xml version="1.0"?>
<project name="My1stHibernate" default="build" basedir=".">
    <property name="base.dir" value="."/>
    <property name="src.dir" value="src" />
    <property name="lib.dir" value="lib" />
    <property name="build.dir" value="classes" />
    <path id="myclasspath">
        <;dir="${lib.dir}">
            <include name="**/*.jar" />
        </>
        <pathelement location="${build.dir}" />
    </path>
    <target name="init">
        <mkdir dir="${build.dir}" />
    </target>
    <target name="build" depends="init" description="compile the source files">
        <javac classpathref="myclasspath" srcdir="${src.dir}" destdir="${build.dir}" />
        <copy todir="${build.dir}" >
            <;dir="${src.dir}" >
                <exclude name="**/*.java"/>
            </>
        </copy>
    </target>
    <target name="run" depends="build">
        <java classpathref="myclasspath" classname="Test" fork="true" />
    </target>
    <target name="clean">
        <delete includeEmptyDirs="true">
            <;dir="${build.dir}" />
        </delete>
    </target>
</project>

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