JavaWeb學習之Hibernate框架（四）

一對多或者多對一關係

       表中的表達

        

           

    orm元數據的表達

      

     

操做關係屬性（保存客戶）

       

       

爲客戶增長聯繫人

        

刪除聯繫人

       

多對多

表中表達式

對象中的

       

orm元數據

       

操做關係屬性

       

package com.domain;

public class LinkMan {
	/*
	 * `lkm_id` bigint(32) NOT NULL AUTO_INCREMENT COMMENT '聯繫人編號(主鍵)',
	 * `lkm_name` varchar(16) DEFAULT NULL COMMENT '聯繫人姓名', `lkm_cust_id`
	 * bigint(32) NOT NULL COMMENT '客戶id', `lkm_gender` char(1) DEFAULT NULL
	 * COMMENT '聯繫人性別', `lkm_phone` varchar(16) DEFAULT NULL COMMENT '聯繫人辦公電話',
	 * `lkm_mobile` varchar(16) DEFAULT NULL COMMENT '聯繫人手機', `lkm_email`
	 * varchar(64) DEFAULT NULL COMMENT '聯繫人郵箱', `lkm_qq` varchar(16) DEFAULT
	 * NULL COMMENT '聯繫人qq', `lkm_position` varchar(16) DEFAULT NULL COMMENT
	 * '聯繫人職位', `lkm_memo` varchar(512) DEFAULT NULL COMMENT '聯繫人備註',
	 */
	// 加一個非本表的字段（只是爲了傳值使用）
	private Long cust_id;

	private Long lkm_id; // 聯繫人編號
	private String lkm_name; // 聯繫人姓名
	private Character lkm_gender; // 聯繫人性別
	private String lkm_phone; // 聯繫人辦公電話
	private String lkm_mobile; // 聯繫人手機
	private String lkm_email; // 聯繫人郵箱
	private String lkm_qq; // 聯繫人qq
	private String lkm_position; // 聯繫人職位
	private String lkm_memo; // 聯繫人備註
	// 爲了表達多對一的關係
	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;
    //表達與聯繫人表一對多的關係
	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寫實體類名，table寫數據庫中對應的表名 -->
	<class name="LinkMan" table="cst_linkman">
		<!--id標籤表明主鍵 -->
		<id name="lkm_id">
			<!-- 表明主鍵的生成模式 -->
			<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>
		<!-- 配置多對一的關係 -->
		<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寫實體類名，table寫數據庫中對應的表名 -->
	<class name="Customer" table="cst_customer">
		<!--id標籤表明主鍵 -->
		<id name="cust_id" column="cust_id">
			<!-- 表明主鍵的生成模式 -->
			<generator class="native"></generator>
			<!-- identity適用於Mysql主鍵生成策略
			<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>
		<!-- 配置一對多的關係 -->
		<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-->
	 <!--必須配置的5條 -->
		<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>
		<!--可選配置
		#hibernate.show_sql true   自動打印sql在控制檯
		#hibernate.format_sql true  規範格式化打印在控制檯的sql-->
		<property name="hibernate.show_sql">true</property>
		<property name="hibernate.format_sql">true</property>
		<!-- 配置hibernate操做數據庫隔離級別 -->
		<!-- #hibernate.connection.isolation  4 -->
		<property name="hibernate.connection.isolation">4</property>
		<!-- 得到與當前線程綁定session對象時必需要配置的 -->
		<property name="hibernate.current_session_context_class">thread</property>
		<!-- 	若是沒有表就會自動生成表，若是有就會自動更新表	
		#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層寫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層進行事務操做
 */
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) {
		// 得到並開啓事務
		Session s = HibernateUtil.getCurrentSession();
		Transaction tx = s.beginTransaction();
		try {
			// 獲取所屬客戶id
			Long cust_id = linkman.getCust_id();
			// 根據客戶id得到該客戶對象
			Customer c = customerDao.getById(cust_id);
			// 表達關係
			linkman.setCustomer(c);
			// 保存
			System.out.println("保存前");
			linkManDao.save(linkman);
		} catch (Exception ex) {
			ex.printStackTrace();
			// 事務回滾
			tx.rollback();
		}
		// 事務提交
		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 {
	// 保存聯繫人信息
	@Test
	public void Test1() {
		// 會話(與數據庫)
		Session session = HibernateUtil.openSession();
		// 開啓事務
		Transaction tx = session.beginTransaction();
		// 建立客戶對象
		Customer c = new Customer();
		c.setCust_name("百度公司");
		// 建立聯繫人對象
		LinkMan lm1 = new LinkMan();
		LinkMan lm2 = new LinkMan();
		// 表達一對多的關係，表達一個客戶對應多個聯繫人
		c.getLinkmens().add(lm1);
		c.getLinkmens().add(lm2);
		// 表達多對一的關係，表達這個聯繫人屬於哪一個客戶
		lm1.setCustomer(c);
		lm2.setCustomer(c);
		// 將瞬時狀態的對象變成持久化對象（把數據存入到數據庫）
		session.save(c);
		session.save(lm1);
		session.save(lm2);

		// 提交事務
		tx.commit();
		// 關閉session
		session.close();
	}

	// 爲客戶添加聯繫人
	@Test
	public void Test2() {
		// 會話(與數據庫)
		Session session = HibernateUtil.openSession();
		// 開啓事務
		Transaction tx = session.beginTransaction();
		// 得到要操做的客戶
		Customer c = session.get(Customer.class, 1l);
		// 建立你要添加的聯繫人對象
		LinkMan lm = new LinkMan();
		lm.setLkm_name("馬雲");
		// 表達多對一關係
		lm.setCustomer(c);
		// 存入數據庫
		session.save(lm);
		// 關閉事務
		tx.commit();
		session.close();
	}

	// 刪除聯繫人
	@Test
	public void Test3() {
		// 會話(與數據庫)
		Session session = HibernateUtil.openSession();
		// 開啓事務
		Transaction tx = session.beginTransaction();
		// 得到要操做的客戶對象
		Customer c = session.get(Customer.class, 1l);
		// 得到要刪除的聯繫人
		LinkMan lm = session.get(LinkMan.class, 3l);
		// 先從客戶集合中將聯繫人對象刪除
		c.getLinkmens().remove(lm);
		// 表達多對一的關係
		lm.setCustomer(null);
		session.delete(lm);
		// 關閉事務
		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 {
		// 中文亂碼
		request.setCharacterEncoding("UTF-8");
		// 接收數據
		Map<String, String[]> map = request.getParameterMap();
		// 封裝數據
		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);
	}
}