JavaWeb学习之Hibernate框架（四）

一对多或者多对一关系

       表中的表达

        

           

    orm元数据的表达

      

     

操作关系属性（保存客户）

       

       

为客户增加联系人

        

删除联系人

       

多对多

表中表达式

对象中的

       

orm元数据

       

操作关系属性

       

package com.domain;

public class LinkMan {
	/*
	 * `lkm_id` bigint(32) NOT NULL AUTO_INCREMENT COMMENT '联系人编号(主键)',
	 * `lkm_name` varchar(16) DEFAULT NULL COMMENT '联系人姓名', `lkm_cust_id`
	 * bigint(32) NOT NULL COMMENT '客户id', `lkm_gender` char(1) DEFAULT NULL
	 * COMMENT '联系人性别', `lkm_phone` varchar(16) DEFAULT NULL COMMENT '联系人办公电话',
	 * `lkm_mobile` varchar(16) DEFAULT NULL COMMENT '联系人手机', `lkm_email`
	 * varchar(64) DEFAULT NULL COMMENT '联系人邮箱', `lkm_qq` varchar(16) DEFAULT
	 * NULL COMMENT '联系人qq', `lkm_position` varchar(16) DEFAULT NULL COMMENT
	 * '联系人职位', `lkm_memo` varchar(512) DEFAULT NULL COMMENT '联系人备注',
	 */
	// 加一个非本表的字段（只是为了传值使用）
	private Long cust_id;

	private Long lkm_id; // 联系人编号
	private String lkm_name; // 联系人姓名
	private Character lkm_gender; // 联系人性别
	private String lkm_phone; // 联系人办公电话
	private String lkm_mobile; // 联系人手机
	private String lkm_email; // 联系人邮箱
	private String lkm_qq; // 联系人qq
	private String lkm_position; // 联系人职位
	private String lkm_memo; // 联系人备注
	// 为了表达多对一的关系
	private Customer customer;

	public Long getCust_id() {
		return cust_id;
	}

	public void setCust_id(Long cust_id) {
		this.cust_id = cust_id;
	}

	public Long getLkm_id() {
		return lkm_id;
	}

	public void setLkm_id(Long lkm_id) {
		this.lkm_id = lkm_id;
	}

	public String getLkm_name() {
		return lkm_name;
	}

	public void setLkm_name(String lkm_name) {
		this.lkm_name = lkm_name;
	}

	public Character getLkm_gender() {
		return lkm_gender;
	}

	public void setLkm_gender(Character lkm_gender) {
		this.lkm_gender = lkm_gender;
	}

	public String getLkm_phone() {
		return lkm_phone;
	}

	public void setLkm_phone(String lkm_phone) {
		this.lkm_phone = lkm_phone;
	}

	public String getLkm_mobile() {
		return lkm_mobile;
	}

	public void setLkm_mobile(String lkm_mobile) {
		this.lkm_mobile = lkm_mobile;
	}

	public String getLkm_email() {
		return lkm_email;
	}

	public void setLkm_email(String lkm_email) {
		this.lkm_email = lkm_email;
	}

	public String getLkm_qq() {
		return lkm_qq;
	}

	public void setLkm_qq(String lkm_qq) {
		this.lkm_qq = lkm_qq;
	}

	public String getLkm_position() {
		return lkm_position;
	}

	public void setLkm_position(String lkm_position) {
		this.lkm_position = lkm_position;
	}

	public String getLkm_memo() {
		return lkm_memo;
	}

	public void setLkm_memo(String lkm_memo) {
		this.lkm_memo = lkm_memo;
	}

	public Customer getCustomer() {
		return customer;
	}

	public void setCustomer(Customer customer) {
		this.customer = customer;
	}

}

　　

package com.domain;

import java.util.HashSet;
import java.util.Set;

public class Customer {
	private Long cust_id;
	// private String cust_id;
	private String cust_name;
	private Long cust_user_id;
	private Long cust_create_id;
	private String cust_source;
	private String cust_industry;
	private String cust_level;
	private String cust_linkman;
	private String cust_phone;
	private String cust_mobile;
    //表达与联系人表一对多的关系
	private Set<LinkMan> linkmens =new HashSet<LinkMan>();
	
	public Set<LinkMan> getLinkmens() {
		return linkmens;
	}

	public void setLinkmens(Set<LinkMan> linkmens) {
		this.linkmens = linkmens;
	}

	public Long getCust_id() {
		return cust_id;
	}

	public void setCust_id(Long cust_id) {
		this.cust_id = cust_id;
	}

	public String getCust_name() {
		return cust_name;
	}

	// public String getCust_id() {
	// return cust_id;
	// }
	// public void setCust_id(String cust_id) {
	// this.cust_id = cust_id;
	// }
	public void setCust_name(String cust_name) {
		this.cust_name = cust_name;
	}

	public Long getCust_user_id() {
		return cust_user_id;
	}

	public void setCust_user_id(Long cust_user_id) {
		this.cust_user_id = cust_user_id;
	}

	public Long getCust_create_id() {
		return cust_create_id;
	}

	public void setCust_create_id(Long cust_create_id) {
		this.cust_create_id = cust_create_id;
	}

	public String getCust_source() {
		return cust_source;
	}

	public void setCust_source(String cust_source) {
		this.cust_source = cust_source;
	}

	public String getCust_industry() {
		return cust_industry;
	}

	public void setCust_industry(String cust_industry) {
		this.cust_industry = cust_industry;
	}

	public String getCust_level() {
		return cust_level;
	}

	public void setCust_level(String cust_level) {
		this.cust_level = cust_level;
	}

	public String getCust_linkman() {
		return cust_linkman;
	}

	public void setCust_linkman(String cust_linkman) {
		this.cust_linkman = cust_linkman;
	}

	public String getCust_phone() {
		return cust_phone;
	}

	public void setCust_phone(String cust_phone) {
		this.cust_phone = cust_phone;
	}

	public String getCust_mobile() {
		return cust_mobile;
	}

	public void setCust_mobile(String cust_mobile) {
		this.cust_mobile = cust_mobile;
	}

	@Override
	public String toString() {
		return "Customer [cust_id=" + cust_id + ", cust_name=" + cust_name + ", cust_user_id=" + cust_user_id
				+ ", cust_create_id=" + cust_create_id + ", cust_source=" + cust_source + ", cust_industry="
				+ cust_industry + ", cust_level=" + cust_level + ", cust_linkman=" + cust_linkman + ", cust_phone="
				+ cust_phone + ", cust_mobile=" + cust_mobile + "]";
	}

}

　　

<?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="com.domain">
	<!-- class中的name写实体类名，table写数据库中对应的表名 -->
	<class name="LinkMan" table="cst_linkman">
		<!--id标签代表主键 -->
		<id name="lkm_id">
			<!-- 代表主键的生成模式 -->
			<generator class="native"></generator>
		</id>
		<property name="lkm_name" ></property>
		<property name="lkm_gender"  ></property>
		<property name="lkm_phone" ></property>
		<property name="lkm_mobile" ></property>
		<property name="lkm_email" ></property>
		<property name="lkm_qq"  ></property>
		<property name="lkm_position" ></property>
		<property name="lkm_memo" ></property>
		<!-- 配置多对一的关系 -->
		<many-to-one name="customer" column="lkm_cust_id"  class="Customer"></many-to-one>
	</class>
</hibernate-mapping>

　　

<?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="com.domain">
	<!-- class中的name写实体类名，table写数据库中对应的表名 -->
	<class name="Customer" table="cst_customer">
		<!--id标签代表主键 -->
		<id name="cust_id" column="cust_id">
			<!-- 代表主键的生成模式 -->
			<generator class="native"></generator>
			<!-- identity适用于Mysql主键生成策略
			<generator class="identity"></generator> -->
		</id>
		<property name="cust_name" column="cust_name" ></property>
		<property name="cust_user_id" column="cust_user_id" ></property>
		<property name="cust_create_id" column="cust_create_id" ></property>
		<property name="cust_source" column="cust_source" ></property>
		<property name="cust_industry" column="cust_industry" ></property>
		<property name="cust_level" column="cust_level" ></property>
		<property name="cust_linkman" column="cust_linkman" ></property>
		<property name="cust_phone" column="cust_phone" ></property>
		<property name="cust_mobile" column="cust_mobile" ></property>
		<!-- 配置一对多的关系 -->
		<set name="linkmens">
		     <key  column="lkm_cust_id"></key>
		     <one-to-many  class="LinkMan"/>
		</set>
	</class>
</hibernate-mapping>

　　

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
	"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
	"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
	<session-factory>
	<!--  #hibernate.dialect org.hibernate.dialect.MySQLDialect
             #hibernate.dialect org.hibernate.dialect.MySQLInnoDBDialect
             #hibernate.dialect org.hibernate.dialect.MySQLMyISAMDialect
             #hibernate.connection.driver_class com.mysql.jdbc.Driver
             #hibernate.connection.url jdbc:mysql:///test
             #hibernate.connection.username gavin
             #hibernate.connection.password-->
	 <!--必须配置的5条 -->
		<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="hibernate.connection.url">jdbc:mysql:///crm?useUnicode=true&characterEncoding=UTF8</property>
		<property name="hibernate.connection.username">root</property>
		<property name="hibernate.connection.password">123456</property>
		<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
		<!--可选配置
		#hibernate.show_sql true   自动打印sql在控制台
		#hibernate.format_sql true  规范格式化打印在控制台的sql-->
		<property name="hibernate.show_sql">true</property>
		<property name="hibernate.format_sql">true</property>
		<!-- 配置hibernate操作数据库隔离级别 -->
		<!-- #hibernate.connection.isolation  4 -->
		<property name="hibernate.connection.isolation">4</property>
		<!-- 获得与当前线程绑定session对象时必须要配置的 -->
		<property name="hibernate.current_session_context_class">thread</property>
		<!-- 	如果没有表就会自动生成表，如果有就会自动更新表	
		#hibernate.hbm2ddl.auto update -->
		<property name="hibernate.hbm2ddl.auto">update</property>
        <mapping resource="com/domain/Customer.hbm.xml"/>
        <mapping resource="com/domain/LinkMan.hbm.xml"/>
        <mapping resource="com/domain/User.hbm.xml"/>
        <mapping resource="com/domain/Role.hbm.xml"/>
	</session-factory>
</hibernate-configuration>

　　

package com.dao;

/*
 *dao层写save方法 
 */
import org.hibernate.Session;

import com.domain.LinkMan;
import com.util.HibernateUtil;

public class LinkManDao {
	public void save(LinkMan linkman) {
		Session s = HibernateUtil.getCurrentSession();
		System.out.println(linkman.getCust_id());
		s.save(linkman);
	}
}

　　

package com.service;

/*
 * service层进行事务操作
 */
import org.hibernate.Session;
import org.hibernate.Transaction;

import com.dao.CustomerDao;
import com.dao.LinkManDao;
import com.domain.Customer;
import com.domain.LinkMan;
import com.util.HibernateUtil;

public class LinkManService {
	private CustomerDao customerDao = new CustomerDao();
	private LinkManDao linkManDao = new LinkManDao();

	public void save(LinkMan linkman) {
		// 获得并开启事务
		Session s = HibernateUtil.getCurrentSession();
		Transaction tx = s.beginTransaction();
		try {
			// 获取所属客户id
			Long cust_id = linkman.getCust_id();
			// 根据客户id获得该客户对象
			Customer c = customerDao.getById(cust_id);
			// 表达关系
			linkman.setCustomer(c);
			// 保存
			System.out.println("保存前");
			linkManDao.save(linkman);
		} catch (Exception ex) {
			ex.printStackTrace();
			// 事务回滚
			tx.rollback();
		}
		// 事务提交
		tx.commit();
	}
}

　　

package com.test;

import org.hibernate.Session;
import org.hibernate.Transaction;
import org.junit.Test;

import com.domain.Customer;
import com.domain.LinkMan;
import com.util.HibernateUtil;

public class Test04 {
	// 保存联系人信息
	@Test
	public void Test1() {
		// 会话(与数据库)
		Session session = HibernateUtil.openSession();
		// 开启事务
		Transaction tx = session.beginTransaction();
		// 创建客户对象
		Customer c = new Customer();
		c.setCust_name("百度公司");
		// 创建联系人对象
		LinkMan lm1 = new LinkMan();
		LinkMan lm2 = new LinkMan();
		// 表达一对多的关系，表达一个客户对应多个联系人
		c.getLinkmens().add(lm1);
		c.getLinkmens().add(lm2);
		// 表达多对一的关系，表达这个联系人属于哪个客户
		lm1.setCustomer(c);
		lm2.setCustomer(c);
		// 将瞬时状态的对象变成持久化对象（把数据存入到数据库）
		session.save(c);
		session.save(lm1);
		session.save(lm2);

		// 提交事务
		tx.commit();
		// 关闭session
		session.close();
	}

	// 为客户添加联系人
	@Test
	public void Test2() {
		// 会话(与数据库)
		Session session = HibernateUtil.openSession();
		// 开启事务
		Transaction tx = session.beginTransaction();
		// 获得要操作的客户
		Customer c = session.get(Customer.class, 1l);
		// 创建你要添加的联系人对象
		LinkMan lm = new LinkMan();
		lm.setLkm_name("马云");
		// 表达多对一关系
		lm.setCustomer(c);
		// 存入数据库
		session.save(lm);
		// 关闭事务
		tx.commit();
		session.close();
	}

	// 删除联系人
	@Test
	public void Test3() {
		// 会话(与数据库)
		Session session = HibernateUtil.openSession();
		// 开启事务
		Transaction tx = session.beginTransaction();
		// 获得要操作的客户对象
		Customer c = session.get(Customer.class, 1l);
		// 获得要删除的联系人
		LinkMan lm = session.get(LinkMan.class, 3l);
		// 先从客户集合中将联系人对象删除
		c.getLinkmens().remove(lm);
		// 表达多对一的关系
		lm.setCustomer(null);
		session.delete(lm);
		// 关闭事务
		tx.commit();
		session.close();
	}
}

　　

package com.web;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.beanutils.BeanUtils;

import com.domain.LinkMan;
import com.service.LinkManService;

public class AddLinkManServlet extends HttpServlet {
	private LinkManService linkManService = new LinkManService();

	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// 中文乱码
		request.setCharacterEncoding("UTF-8");
		// 接收数据
		Map<String, String[]> map = request.getParameterMap();
		// 封装数据
		LinkMan linkman = new LinkMan();
		try {
			BeanUtils.populate(linkman, map);
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		// 保存
		linkManService.save(linkman);
		// 重定向
		response.sendRedirect(request.getContextPath() + "/ListLinkManServlet");
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}
}