JavaEE框架——hibernate框架的综合使用
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hibernate框架的综合使用——通过使用hibernate框架多数据库的单表和多表进行增删改查，下面是详细代码
1.先通过蚂蚁搬家Ant建立数据库
createTables.sql
CREATE DATABASE mydb character set utf8;
use mydb;
create table student(
id varchar(32) primary key,
name varchar(20),
age int ,
deptId varchar(32)
);
insert into student values('S001','Jack',20,'D001');
insert into student values('S002','TOM',21,'D001');
insert into student values('S003','张三',22,'D001');
insert into student values('S004','李四',23,'D001');multi.sql
use mydb;
create table stud(
id varchar(32) primary key,
name varchar(20),
age int ,
deptId varchar(32)
);
create table dept(
id varchar(32) primary key,
name varchar(20)
);
ALTER TABLE stud ADD CONSTRAINT fk_dept FOREIGN KEY(deptId) REFERENCES dept(id);
insert into dept values('D001','信息科学与工程学院');
insert into dept values('D002','土木学院');
insert into stud values('S001','Jack',20,'D001');
insert into stud values('S002','TOM',21,'D001');
insert into stud values('S003','张三',22,'D001');
insert into stud values('S004','李四',23,'D001');把build.xml放在项目目录下
build.xml
<?xml version="1.0" encoding="UTF-8"?>
<project basedir="." default="dft">
<property name="url" value="jdbc:mysql://127.0.0.1:3306/sstud?useUnicode=true&characterEncoding=UTF-8"></property>
<property name="driver" value="com.mysql.jdbc.Driver"></property>
<property name="user" value="root"></property>
<property name="pwd" value="1234"></property>
<target name="dft" depends="createStudentTable" >
<echo>Hello</echo>
</target>
<target name="createStudentTable">
<sql userid="$user" password="$pwd" url="$url" driver="$driver" delimiter=";">
<fileset dir="$basedir/WebRoot/sql">
<include name="*.sql"/>
</fileset>
<classpath>
<fileset dir="$basedir/WebRoot/WEB-INF/lib">
<include name="*.jar"/>
</fileset>
</classpath>
</sql>
</target>
<target name="createMutiTable">
<sql userid="$user" password="$pwd" url="$url" driver="$driver" delimiter=";">
<fileset dir="$basedir/WebRoot/sql">
<include name="mutiSql.sql"/>
</fileset>
<classpath>
<fileset dir="$basedir/WebRoot/WEB-INF/lib">
<include name="*.jar"/>
</fileset>
</classpath>
</sql>
</target>
</project>
2.写hibernate配置文件和值对象
在项目的src目录下加上配置文件
hibernate.cfg.xml
<?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>
<property name="connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="connection.url">
jdbc:mysql://127.0.0.1:3306/mydb
</property>
<property name="connection.username">root</property>
<property name="connection.password">1234</property>
<property name="dialect">
org.hibernate.dialect.MySQLDialect
</property>
<mapping resource="cn/hncu/domain/Student.hbm.xml"/>
</session-factory>
</hibernate-configuration>在值对象的目录下写入Student.hbm.xml映射文件
Student.hbm.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.hncu.domain">
<class name="Student" table="student" catalog="mydb">
<id name="studId" type="java.lang.String">
<column name="id" length="32"></column>
</id>
<property name="studName" type="java.lang.String">
<column name="name" length="20"></column>
</property>
<property name="studAge" type="java.lang.Integer">
<column name="age"></column>
</property>
<property name="deptId" type="java.lang.String">
<column name="deptId" length="32"></column>
</property>
</class>
<class name="Stud" table="stud" catalog="mydb">
<id name="studId" type="java.lang.String">
<column name="id" length="32"></column>
</id>
<property name="studName" type="java.lang.String">
<column name="name" length="20"></column>
</property>
<property name="studAge" type="java.lang.Integer">
<column name="age"></column>
</property>
<!-- 在多方配置一个一方值对象：为Student类中的dept属性注入值 -->
<many-to-one name="dept" class="Dept" fetch="select">
<column name="deptId" length="32"></column>
</many-to-one>
</class>
<class name="Dept" table="dept" catalog="mydb">
<id name="deptId" type="java.lang.String">
<column name="id" length="32"></column>
</id>
<property name="deptName" type="java.lang.String">
<column name="name" length="20"></column>
</property>
<!-- 在一方为所拥有的多方集合注入值：为Dept类中的students属性注入值 ,级联必须要配置属性:cascade="all" -->
<set name="students" table="stud" catalog="mydb" inverse="true" cascade="none">
<key>
<column name="deptId" length="32"></column>
</key>
<one-to-many class="Stud"/>
</set>
</class>
</hibernate-mapping>Student.java值对象
package cn.hncu.domain;
public class Student
private String studId;
private String studName;
private Integer studAge;
private String deptId;
public String getStudId()
return studId;
public void setStudId(String studId)
this.studId = studId;
public String getStudName()
return studName;
public void setStudName(String studName)
this.studName = studName;
@Override
public int hashCode()
final int prime = 31;
int result = 1;
result = prime * result + ((studId == null) ? 0 : studId.hashCode());
return result;
@Override
public boolean equals(Object obj)
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Student other = (Student) obj;
if (studId == null)
if (other.studId != null)
return false;
else if (!studId.equals(other.studId))
return false;
return true;
public Integer getStudAge()
return studAge;
public void setStudAge(Integer studAge)
this.studAge = studAge;
public String getDeptId()
return deptId;
public void setDeptId(String deptId)
this.deptId = deptId;
@Override
public String toString()
return "Student [studId=" + studId + ", studName=" + studName
+ ", studAge=" + studAge + ", deptId=" + deptId + "]";
Stud.java值对象
package cn.hncu.domain;
public class Stud
private String studId;
private String studName;
private Integer studAge;
private Dept dept;
public String getStudId()
return studId;
public void setStudId(String studId)
this.studId = studId;
public String getStudName()
return studName;
public void setStudName(String studName)
this.studName = studName;
public Integer getStudAge()
return studAge;
public void setStudAge(Integer studAge)
this.studAge = studAge;
public Dept getDept()
return dept;
public void setDept(Dept dept)
this.dept = dept;
@Override
public int hashCode()
final int prime = 31;
int result = 1;
result = prime * result + ((studId == null) ? 0 : studId.hashCode());
return result;
@Override
public boolean equals(Object obj)
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Stud other = (Stud) obj;
if (studId == null)
if (other.studId != null)
return false;
else if (!studId.equals(other.studId))
return false;
return true;
Dept.java值对象
package cn.hncu.domain;
import java.util.HashSet;
import java.util.Set;
public class Dept
private String deptId;
private String deptName;
private Set<Stud> students=new HashSet<Stud>();
public String getDeptId()
return deptId;
public void setDeptId(String deptId)
this.deptId = deptId;
public String getDeptName()
return deptName;
public void setDeptName(String deptName)
this.deptName = deptName;
public Set<Stud> getStudents()
return students;
public void setStudents(Set<Stud> students)
this.students = students;
@Override
public int hashCode()
final int prime = 31;
int result = 1;
result = prime * result + ((deptId == null) ? 0 : deptId.hashCode());
return result;
@Override
public boolean equals(Object obj)
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Dept other = (Dept) obj;
if (deptId == null)
if (other.deptId != null)
return false;
else if (!deptId.equals(other.deptId))
return false;
return true;
@Override
public String toString()
return "Dept [deptId=" + deptId + ", deptName=" + deptName
+ ", students=" + students + "]";
3.写前端页面
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>hibernate技术演示</title>
</head>
<body>
<a href="<c:url value='/DemoServlet'/>">演示单表操作</a><br/>
<a href="<c:url value='/MultiServlet'/>">演示多表操作</a>
</body>
</html>dem1.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>hibernate技术演示——单表操作</title>
<script type="text/javascript" src="<c:url value='/js/ajax.js'/>"></script>
<script type="text/javascript">
var path = "<c:url value='/'/>";
function showChange(obj)
var id = obj.value;
var ajax = new Ajax();
var url = path + "DemoServlet?cmd=updateStudent&id=" + id;
ajax.get(url, succ, failure);
function succ(data)
if (data == "1")
window.location.href = path + "/DemoServlet";
function failure(data)
alert(data);
function query()
var id=document.getElementById("id").value;
id=id.trim();
var name=document.getElementById("name").value;
name=name.trim();
var age=document.getElementById("age").value;
age=age.trim();
var deptId=document.getElementById("deptId").value;
deptId=deptId.trim();
var ajax = new Ajax();
var url=path+"DemoServlet";
param="cmd=queryStudent&id="+id+"&name="+name+"&age="+age+"&deptId="+deptId;
ajax.post(url, param, succ, failure);
</script>
</head>
<body>
<h3>hibernate技术演示——单表操作</h3>
<table>
<tr>
<td>学生ID</td>
<td>学生姓名</td>
<td>学生年龄</td>
<td>部门ID</td>
</tr>
<c:forEach items="$sessionScope.list " var="stud">
<tr>
<td>$stud.studId</td>
<td>$stud.studName</td>
<td>$stud.studAge</td>
<td>$stud.deptId</td>
<td><a
href="<c:url value='/DemoServlet?cmd=delStudent&id=$stud.studId'/>">删除</a>
</td>
</tr>
</c:forEach>
</table>
<h3>添加一个学生信息</h3>
<form action="<c:url value='/DemoServlet?cmd=addStudent'/>"
method="post">
<table>
<tr>
<td>学号<font color="red">*</font>
</td>
<td><input type="text" name="id" /></td>
</tr>
<tr>
<td>姓名<font color="red">*</font>
</td>
<td><input type="text" name="name" /></td>
</tr>
<tr>
<td>年龄<font color="red"></font>
</td>
<td><input type="text" name="age" /></td>
</tr>
<tr>
<td>部门编号<font color="red">*</font>
</td>
<td><input type="text" name="deptId" /></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="添加" /></td>
</tr>
</table>
</form>
<h3>修改一个学生信息</h3>
<select onchange="showChange(this)">
<option value="none">请选择学生</option>
<c:forEach items="$sessionScope.list " var="stud">
<option value="$stud.studId">$stud.studId</option>
</c:forEach>
</select>
<c:if test="$!empty updateStud ">
<form action="<c:url value='/DemoServlet?cmd=addStudent'/>"
method="post">
<table>
<tr>
<td>学号<font color="red">*</font>
</td>
<td><input type="text" name="id" value="$updateStud.studId " />
</td>
</tr>
<tr>
<td>姓名<font color="red">*</font>
</td>
<td><input type="text" name="name"
value="$updateStud.studName " /></td>
</tr>
<tr>
<td>年龄<font color="red"></font>
</td>
<td><input type="text" name="age"
value="$updateStud.studAge " /></td>
</tr>
<tr>
<td>部门编号<font color="red">*</font>
</td>
<td><input type="text" name="deptId"
value="$updateStud.deptId " /></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="修改" /></td>
</tr>
</table>
</form>
<c:remove var="updateStud" />
</c:if>
<h3>学生信息查询</h3>
<table>
<tr>
<td>学号<font color="red">*</font>
</td>
<td><input type="text" id="id" name="id" /></td>
</tr>
<tr>
<td>姓名<font color="red">*</font>
</td>
<td><input type="text"id="name" name="name" /></td>
</tr>
<tr>
<td>年龄<font color="red"></font>
</td>
<td><input type="text" id="age" name="age" /></td>
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