JavaWeb学习之Hibernate框架（二）

hibernateAPI详解

Configuration

创建

加载主配置

创建sessionFactory

SessionFactory

session

获得事务

增

查

改

删

Transaction封装事务的操作

打开事务

提交事务

回滚事务

CRM练习：保存客户

CRM：customer　relation　manager　　客户关系管理系统

１、创建web项目

２、导包

　　hibernate包、数据库驱动包、标签库包、BeanＵtiｌs包

３、引入静态页面

４、搭建hibernate框架

５、思路分析

６、开发

７、测试

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.Customer;
import com.service.CustomerService;

public class AddCustomerServlet extends HttpServlet {
	private CustomerService customerService = new CustomerService();

	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// 1、获取数据
		request.setCharacterEncoding("UTF-8");
		Map<String, String[]> map = request.getParameterMap();
		// 2、创建对象
		Customer customer = new Customer();
		// 3、封装数据
		try {
			BeanUtils.populate(customer, map);
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		// 4、调用service中的保存方法
		customerService.save(customer);
		// 5、重定向
		response.sendRedirect(request.getContextPath()+"/ListCustomerServlet");
	}

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

package com.service;

import com.dao.CustomerDao;
import com.domain.Customer;

public class CustomerService {
	private CustomerDao customerDao = new CustomerDao();

	public void save(Customer customer) {
		customerDao.save(customer);
	}
}

package com.dao;

import org.hibernate.Session;
import org.hibernate.Transaction;

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

public class CustomerDao {
	public void save(Customer customer) {
		Session session = HibernateUtil.openSession();
		Transaction tx = session.beginTransaction();
		session.save(customer);
		tx.commit();
		session.close();
	}
}

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="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>

package com.util;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
	private static SessionFactory sf;
	static{
		//加载hibernate主配置文件
		Configuration conf=new Configuration().configure();
		sf=conf.buildSessionFactory();
	}
	//获得全新的session
	public static Session openSession(){
		return sf.openSession();
	}
	//获取一个与当前线程绑定的session
	public static Session getCurrentSession(){
		return sf.getCurrentSession();
	}
}

<?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>

原文地址：https://www.cnblogs.com/Java-125/p/9138319.html