Javaweb--Spring整合Hibernate-spring管理hibernate配置

思路

使用spring的配置文件统合hibernate的核心配置文件.这样做的有点是减少了xml文件的配置,简化了编程

hibernate的核心配置文件hibernate.cfg.xml的组成大致可以分为三个部分:

1. sql基础配置并

2. hibernate基础配置

3. mapping映射配置

目录结构



准备操作

a) 导入jar包

b) 设置spring配置文件applicationContext.xml,写入约束

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
</beans>

c) 编写Javabean,并配置映射文件

Javabean:User.java

package cn.xiangshi.domain;

public class User {
private Integer id;
private String name;
private Integer age;
public User() {
super();

}
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 Integer getAge() {
return age;
}
public<
4000
/span> void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "IUser [id=" + id + ", name=" + name + ", age=" + age + "]";
}

}

配置映射文件:User.hbm.xml

<?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>
<class name="cn.xiangshi.domain.User" table="t_user">
<id name="id" column="t_id">
<generator class="identity"></generator>
</id>
<property name="name" column="t_name" length="10" />
<property name="age" column="t_age" />
</class>
</hibernate-mapping>

d) 设置dataSource配置文件db.properties

jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///ssh_hibernate1
jdbc.username=root
jdbc.password=123

整合

1. web.xml中引入applicationContext.xml

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

applicationContext中引入db.properties,以备设置dateSource

<!-- 加载properties文件 -->
<context:property-placeholder location="classpath:db.properties" />

设置dataSource

<!-- 配置dataSource -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driverClass}" />
<property name="jdbcUrl" value="${jdbc.url}" />
<property name="user" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>

设置hibernate

a) 引入dataSource

b) 配置hibernate

c) 引入Javabean.hbm.xml映射文件

<!-- 配置hibernate -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<!-- 引入dataSource -->
<property name="dataSource" ref="dataSource" />

<!-- 配置hibernate其他属性 -->
<property name="hibernateProperties">
<value>
hibernate.dialect=org.hibernate.dialect.MySQLDialect
hibernate.hbm2ddl.auto=update
hibernate.show_sql=true
hibernate.format_sql=true
</value>
</property>

<!-- 配置hibernate映射文件 -->
<property name="mappingResources">
<list>
<value>cn/xiangshi/domain/User.hbm.xml</value>
</list>
</property>
</bean>

测试

将想入导入Tomcat运行,如果数据库中生成表,即表明代码可以跑通,配置正确

补充

applicationContext.xml中配置mapping有四种方式,分别对应org.springframework.orm.hibernate5.LocalSessionFactoryBean中的四个set方法

<!-- 配置hibernate映射文件 -->

<!-- 文件相对路径,类似于hibernate.cfg.xml中的<mapping resource=””> -->
<property name="mappingResources">
<list>
<value>cn/xiangshi/domain/User.hbm.xml</value>
</list>
</property>

<!-- 路径加载 -->
<property name="mappingLocations">
<list>
<value>classpath:cn/xiangshi/domain/User.hbm.xml</value>
</list>
</property>

<!-- 目录加载 -->
<property name="mappingDirectoryLocations">
<list>
<value>classpath:cn/xiangshi/domain/User.hbm.xml</value>
</list>
</property>

<!-- 导入jar包中的映射文件
mappingJarLocations
-->

对hibernate的配置,以下两段代码等价

<property name="hibernateProperties">
<props>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>

<property name="hibernateProperties">
<value>
hibernate.dialect=org.hibernate.dialect.MySQLDialect
hibernate.hbm2ddl.auto=update hibernate.show_sql=true
hibernate.format_sql=true
</value>
</property>