Hibernate实现批量添加数据的方法

Z时代
2024-01-10
分类：IT

本文实例讲述了Hibernate实现批量添加数据的方法。分享给大家供大家参考，具体如下：

1.Hibernate_016_BatchAddData程序目录结构：

2.lib目录下所引入的jar包：

3.MedicineDao.java源代码：


package com.xqh.dao;
import java.util.List;
import org.hibernate.Session;
import com.xqh.model.Medicine;
import com.xqh.util.HibernateUtil;
/**
 * 药品数据库操作类
 *
 */
public class MedicineDao {
  /**
   * 批量保存药品
   *
   * @param ms
   *      List集合
   */
  public void saveMedicines(List<Medicine> ms) {
    Session session = null;
    if (ms != null && ms.size() > 0) {
      try {
        session = HibernateUtil.getSession(); // 获取Session
        session.beginTransaction(); // 开启事物
        Medicine medicine = null; // 创建药品对象
        // 循环获取药品对象
        for (int i = 0; i < ms.size(); i++) {
          medicine = (Medicine) ms.get(i); // 获取药品
          session.save(medicine); // 保存药品对象
          // 批插入的对象立即写入数据库并释放内存
          if (i % 10 == 0) {
            session.flush();
            session.clear();
          }
        }
        session.getTransaction().commit(); // 提交事物
      } catch (Exception e) {
        e.printStackTrace(); // 打印错误信息
        session.getTransaction().rollback(); // 出错将回滚事物
      } finally {
        HibernateUtil.closeSession(session); // 关闭Session
      }
    }
  }
}

4.Medicine.java源代码：


package com.xqh.model;
/**
 * 药品持久化类
 */
public class Medicine {
  private Integer id;       //id号
  private String name;      //药品名称
  private double price;      //价格
  private String factoryAdd;   //出厂地址
  public Integer getId() {
    return id;
  }
  public void setId(Integer id) {
    this.id = id;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public double getPrice() {
    return price;
  }
  public void setPrice(double price) {
    this.price = price;
  }
  public String getFactoryAdd() {
    return factoryAdd;
  }
  public void setFactoryAdd(String factoryAdd) {
    this.factoryAdd = factoryAdd;
  }
}

5.Medicine.hbm.xml源代码：


<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
  "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
  "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
  <class name="com.xqh.model.Medicine" table="tb_medicine_batch">
    <id name="id">
      <generator class="native"/>
    </id>
    <property name="name" not-null="true" length="200" />
    <property name="price" not-null="true"/>
    <property name="factoryAdd" length="200"/>
  </class>
</hibernate-mapping>

6.SaveMedicine.java源代码：


package com.xqh.servlet;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.xqh.dao.MedicineDao;
import com.xqh.model.Medicine;
public class SaveMedicine extends HttpServlet {
  private static final long serialVersionUID = 3743334039515411666L;
  public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    // 药品名称
    String names[] = request.getParameterValues("name");
    // 价格
    String prices[] = request.getParameterValues("price");
    // 出厂地址
    String adds[] = request.getParameterValues("factoryAdd");
    // 有效性判断
    if(names != null && prices != null && adds != null){
      if(names.length == prices.length && names.length == adds.length){
        // 实例化一个List集合
        List<Medicine> ms = new ArrayList<Medicine>();
        Medicine m = null; // 药品对象
        // 依次实例化药品对象并添加到集合中
        for (int i = 0; i < names.length; i++) {
          m = new Medicine(); // 实例化药品
          // 对属性赋值
          m.setName(names[i]);
          m.setPrice(Double.parseDouble(prices[i]));
          m.setFactoryAdd(adds[i]);
          ms.add(m); // 添加到集合中
        }
        // 实例化MedicineDao对象
        MedicineDao dao = new MedicineDao();
        dao.saveMedicines(ms); // 批量保存药品
        request.setAttribute("info", "药品信息保存成功！！！");
      }
    }
    // 转发到result.jsp页面
    request.getRequestDispatcher("result.jsp").forward(request, response);
  }
}

7.CharacterEncodingFilter.java源代码：


/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.xqh.util;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
/**
 * 字符编码过滤器
 */
public class CharacterEncodingFilter implements Filter{
  protected String encoding = null;
  protected FilterConfig filterConfig = null;
  public void init(FilterConfig filterConfig) throws ServletException {
    this.filterConfig = filterConfig;
    this.encoding = filterConfig.getInitParameter("encoding");
  }
  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    if (encoding != null) {
      request.setCharacterEncoding(encoding);
      response.setContentType("text/html; charset="+encoding);
    }
    chain.doFilter(request, response);
  }
  public void destroy() {
    this.encoding = null;
    this.filterConfig = null;
  }
}

8.HibernateUtil.java源代码：


package com.xqh.util;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
/**
 * Hibernate初始化类，用于获取Session、SessionFactory 及关闭Session
 */
public class HibernateUtil {
  // SessionFactory对象
  private static SessionFactory factory = null;
  // 静态块
  static {
    try {
      // 加载Hibernate配置文件
      Configuration cfg = new Configuration().configure();
      // 实例化SessionFactory
      factory = cfg.buildSessionFactory();
    } catch (HibernateException e) {
      e.printStackTrace();
    }
  }
  /**
   * 获取Session对象
   * @return Session对象
   */
  public static Session getSession() {
    //如果SessionFacroty不为空，则开启Session
    Session session = (factory != null) ? factory.openSession() : null;
    return session;
  }
  /**
   * 获取SessionFactory对象
   * @return SessionFactory对象
   */
  public static SessionFactory getSessionFactory() {
    return factory;
  }
  /**
   * 关闭Session
   * @param session对象
   */
  public static void closeSession(Session session) {
    if (session != null) {
      if (session.isOpen()) {
        session.close(); // 关闭Session
      }
    }
  }
}

9.hibernate.cfg.xml源代码：


<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
     "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
     "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
  <session-factory>
    <!-- 方言 -->
    <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
    <!-- 数据库连接 -->
    <property name="connection.url">jdbc:mysql://localhost:3306/learn</property>
    <!-- 数据库连接用户名 -->
    <property name="connection.username">root</property>
    <!-- 数据库连接密码 -->
    <property name="connection.password">1120</property>
    <!-- 数据库驱动 -->
    <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
    <!-- 打印SQL语句 -->
    <property name="show_sql">true</property>
    <!-- 自动建表 -->
    <property name="hibernate.hbm2ddl.auto">update</property>
    <!-- 映射文件 -->
    <mapping resource="com/xqh/model/Medicine.hbm.xml"/>
  </session-factory>
</hibernate-configuration>

10.log4j.properties源代码：

### 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 file hibernate.log ###

#log4j.appender.file=org.apache.log4j.FileAppender

#log4j.appender.file.File=hibernate.log

#log4j.appender.file.layout=org.apache.log4j.PatternLayout

#log4j.appender.file.layout.ConversionPattern=%d{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

11.index.jsp源代码：


<%@ page language="java" contentType="text/html" pageEncoding="GBK"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>批量添加药品信息</title>
    <style type="text/css">
td {
  background: #EBEBEB;
  font-family: Verdana;
  font-size: 12px;
  background-color: #EBEBEB;
  color: black;
  line-height: 20px;
  height: 30px;
}
</style>
    <script type="text/javascript">
    function add(){
      var a = document.getElementById("a");
      var b = document.getElementById("b");
      b.innerHTML += a.innerHTML;
    }
    function reduce() {
      var a = document.getElementById("a");
      var b = document.getElementById("b");
      var stra = a.innerHTML;
      var strb = b.innerHTML;
      b.innerHTML = strb.substring(0, strb.length - stra.length);
    }
    function save(formName){
      for(i=0;i<formName.length;i++){
        if(formName.elements[i].value==""){
          alert("请填写完整信息!");
          return false;
        }
      }
    }
  </script>
  </head>
  <body >
    <form action="SaveMedicine" method="post"
      onsubmit="return save(this);">
      <table align="center" border="0" cellpadding="3" cellspacing="1"
        width="600">
        <tr>
          <td align="center">
            <br>
            <h1>
              批量添加药品信息
            </h1>
          </td>
        </tr>
        <tr>
          <td>
            <div id="b"></div>
          </td>
        </tr>
        <tr>
          <td>
            <input type="button" value="添加一行 " onclick="add()">
            <input type="button" value="减少一行" onclick="reduce()">
            <input type="submit" value="批量添加到数据库">
          </td>
        </tr>
      </table>
    </form>
    <div id="a" style="display: none">
      <table align="center" border="0">
        <tr>
          <td>
            名称：
          </td>
          <td>
            <input type="text" name="name" size="13">
          </td>
          <td>
            单价：
          </td>
          <td>
            <input type="text" name="price" size="13">
          </td>
          <td>
            厂址：
          </td>
          <td>
            <input type="text" name="factoryAdd" size="30">
          </td>
        </tr>
      </table>
    </div>
  </body>
</html>

12.result.jsp源代码：


<%@ page language="java" contentType="text/html" pageEncoding="GBK"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
 <head>
  <title>结果信息</title>
  <!--
  <link rel="stylesheet" type="text/css" href="styles.css">
  -->
 </head>
 <body>
  <div align="center">
    <font color="red" size="12px;" style="font-weight: bold;">
      ${info}
    </font>
    <br><br><br><br>
    <a href="index.jsp">返回</a>
  </div>
 </body>
</html>