Hibernate List集合

1.新建一个maven项目HibernateDemo

2.编写pom.xml文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.meterbox</groupId><artifactId>HibernateDemo</artifactId><packaging>war</packaging><version>0.0.1-SNAPSHOT</version><name>HibernateDemo Maven Webapp</name><url>http://maven.apache.org</url><!-- 属性配置 --><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><log4j.version>1.2.17</log4j.version><mysql.version>5.1.30</mysql.version></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope></dependency><!-- 添加Hibernate依赖 --><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-core</artifactId><version>3.6.10.Final</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>1.6.1</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-nop</artifactId><version>1.6.4</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>1.7.2</version></dependency><!-- 添加javassist --><dependency><groupId>javassist</groupId><artifactId>javassist</artifactId><version>3.11.0.GA</version></dependency><!-- jsp页面的jar --><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.0.1</version></dependency><!-- 日志 --><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>${log4j.version}</version></dependency><dependency><groupId>commons-logging</groupId><artifactId>commons-logging</artifactId><version>1.2</version></dependency></dependencies><build><finalName>HibernateDemo</finalName></build></project>

3.编写Person类

public class Person {private String id;private String name;private int age;private List<String> schools = new ArrayList<String>();//getter setter方法。。。。}

4.编写Person.hbm.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><hibernate-mapping package="cn.edu.hpu.collection.model"><class name="Person" table="table_person"><id name="id" type="java.lang.String"><generator class="uuid" /></id><property name="name" type="java.lang.String"></property><property name="age" type="java.lang.Integer"></property><list name="schools" table="table_schools"><!-- 外键 --><key column="personid" not-null="true"></key><!-- 映射集合属性数据表的集合索引列 --><list-index column="list_order" /><element type="string" column="school_name"></element></list></class></hibernate-mapping>

5.编写hibernate.cfg.xml文件

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.org/dtd/hibernate-configuration-3.0.dtd"><hibernate-configuration><session-factory><property name="connection.driver_class">com.mysql.jdbc.Driver</property><property name="connection.url">jdbc:mysql://localhost:3306/zhjdata?useUnicode=true&characterEncoding=UTF-8</property><property name="connection.username">root</property><property name="connection.password">123456</property><!-- 显示SQL语句 --><property name="show_sql">true</property><property name="format_sql">true</property><!-- 根据需要自动创建数据库 --><property name="hbm2ddl.auto">update</property><!-- 定义方言 --><property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>        <!-- 指定连接池里最大连接数 --><property name="hibernate.c3p0.max_size">20</property><!-- 指定连接池里最小连接数 --><property name="hibernate.c3p0.min_size">1</property><!-- 指定连接池里连接的超时时长 --><property name="hibernate.c3p0.timeout">5000</property>        <!-- 指定连接池里最大缓存多少个Statement对象 --><property name="hibernate.c3p0.max_statements">100</property><property name="hibernate.c3p0.idle_test_period">3000</property><property name="hibernate.c3p0.acquire_increment">2</property><property name="hibernate.c3p0.validate">true</property>                <mapping resource="cn/edu/hpu/collection/model/Person.hbm.xml"/></session-factory></hibernate-configuration>

6.编写HibernateUtil类

package cn.edu.hpu.util;import org.apache.log4j.Logger;import org.hibernate.HibernateException;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;public class HibernateUtil {/** ThreadLocal Session Map */public static final ThreadLocal<Session> SESSIONMAP = new ThreadLocal<Session>();private static final SessionFactory sessionFactory;private static final Logger LOGGER = Logger.getLogger("appender2");static {try {LOGGER.debug("HibernateUti.static - loading cofig");sessionFactory = new Configuration().configure("hibernate.cfg.xml").buildSessionFactory();LOGGER.debug("HibernateUtil.static - end");} catch (Throwable ex) {ex.printStackTrace();LOGGER.error("HibernateUti error : ExceptionInInitializerError");throw new ExceptionInInitializerError(ex);}}private HibernateUtil() {}public static Session getSession() throws HibernateException {Session session = SESSIONMAP.get();if (session == null) {session = sessionFactory.openSession();SESSIONMAP.set(session);}return session;}public static void closeSession() throws HibernateException {Session session = SESSIONMAP.get();SESSIONMAP.set(null);if (session != null) {session.close();}}}

7.配置日志文件log4j.properties

# 1.\u6587\u672C\u683C\u5F0F# set level  log4j.rootLogger=debug,appender2  # output into filelog4j.appender.appender2=org.apache.log4j.FileAppender  # file direct# text filelog4j.appender.appender2.File=D:/data/logs/Log4JDemo02.log  # output stylelog4j.appender.appender2.layout=org.apache.log4j.TTCCLayout  

8.编写测试类PersonManger

package cn.edu.hpu.test;import java.util.ArrayList;import java.util.List;import org.hibernate.Session;import org.hibernate.Transaction;import org.junit.Test;import cn.edu.hpu.collection.model.Person;import cn.edu.hpu.util.HibernateUtil;public class PersonManger {@Testpublic void testSave() {Session session = HibernateUtil.getSession();Transaction trans = session.beginTransaction();Person p = new Person();p.setAge(29);p.setName("zhangHJ");List<String> schools = new ArrayList<String>();schools.add("小学");schools.add("中学");schools.add("大学");p.setSchools(schools);session.save(p);trans.commit();HibernateUtil.closeSession();}}

10.结果显示