springdata笔记2
作者：互联网
SpringData整合hibernate
CRUD操作:
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.fly</groupId>
<artifactId>te-spring-data</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.4</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.16.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>5.2.16.Final</version>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.46</version>
</dependency>
<!--SpringData整合hibernate基于JPA规范：-->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>2.1.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>1.0.0.Final</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
</project>jdbc.properties:
db.driver=com.mysql.jdbc.Driver
db.url=jdbc:mysql:///mybatis?useUnicode=true&characterEncoding=utf-8&useSSL=false
db.username=root
db.password=rootapplicationContext.xml:
<?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"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 配置读取properties文件的工具类 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 配置c3p0数据库连接池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${db.driver}"/>
<property name="jdbcUrl" value="${db.url}"/>
<property name="user" value="${db.username}"/>
<property name="password" value="${db.password}"/>
</bean>
<!--=====================spring+hibernate=============================-->
<bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!-- hibernateProperties属性：配置与hibernate相关的内容，如显示sql语句，开启正向工程 -->
<property name="hibernateProperties">
<props>
<!-- 显示当前执行的sql语句 -->
<prop key="hibernate.show_sql">true</prop>
<!-- 开启正向工程 -->
<!--<prop key="hibernate.hbm2ddl.auto">update</prop>-->
</props>
</property>
<!-- 扫描实体所在的包 -->
<property name="packagesToScan">
<list>
<value>fly.pojo</value>
</list>
</property>
</bean>
<!-- 配置HibernateTemplate对象 -->
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate5.HibernateTemplate">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<!-- 配置Hibernate的事务管理器 -->
<bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<!--===============================================================-->
<!-- 配置开启注解事务处理 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
<!-- 配置springIOC的注解扫描 -->
<context:component-scan base-package="fly"/>
</beans>
UserDaoImpl:
@Repository
public class UserDaoImpl{
@Autowired
private HibernateTemplate hibernateTemplate;
public User selectUsersById(Integer userId) {
return this.hibernateTemplate.get(User.class, userId);
}
/**
* HQL
* 将原来的sql语句中的表与字段名换成对象与属性的名称
*/
public User selectUsersByIdHQL(Integer userId) {
//getCurrentSession:当前session必须要有事务边界，且只能处理唯一的一个事务。当事务提交或者回滚后session自动失效
//openSession:每次都会打开一个新的session.加入每次使用多次。则获得的是不同session对象。使用完毕后我们需要手动的调用colse方法关闭session
Session session = this.hibernateTemplate.getSessionFactory().getCurrentSession();
Query query = session.createQuery("from User where id = :id").setParameter("id", userId);
List list = query.getResultList();
return (User) list.get(0);
}
/**
* SQL
*/
public List<User> selectUsersByIdSQL(String username,String sex) {
Session session = this.hibernateTemplate.getSessionFactory().getCurrentSession();
String sql = "select * from user where username like ? and sex = ?";
Query query = session.createNativeQuery(sql,User.class).setParameter(1,"%"+username+"%").setParameter(2,sex);
List list = query.getResultList();
return list;
}
/**
*基于JPA规范的CriteriaQuery查询
* Criteria过时
* (since 5.2) for Session, use the JPA Criteria
*/
public List<User> selectUsersByIdQBC(String username) {
Session session = this.hibernateTemplate.getSessionFactory().getCurrentSession();
CriteriaBuilder builder = session.getCriteriaBuilder();
CriteriaQuery<User> criteriaQuery = builder.createQuery(User.class);
Root<User> root = criteriaQuery.from(User.class);
criteriaQuery.select(root);
criteriaQuery.where(builder.like(root.get("username"),"%"+username+"%"));
return session.createQuery(criteriaQuery).getResultList();
}
/**
* 多参数
*/
public List<User> selectUsersByIdQBC2(String username,String sex) {
Session session = this.hibernateTemplate.getSessionFactory().getCurrentSession();
CriteriaBuilder builder = session.getCriteriaBuilder();
CriteriaQuery<User> criteriaQuery = builder.createQuery(User.class);
Root<User> root = criteriaQuery.from(User.class);
List<Predicate> predicateList = new ArrayList<>();
predicateList.add(builder.like(root.get("username"),"%"+username+"%"));
predicateList.add(builder.equal(root.get("sex"),sex));
criteriaQuery.where(predicateList.toArray(new Predicate[predicateList.size()]));
return session.createQuery(criteriaQuery).getResultList();
}
}
spring + jpa
<!--=======================spring+jpa========================================-->
<!-- Spring整合JPA 配置EntityManagerFactory-->
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<!-- hibernate相关的属性的注入 -->
<!-- 配置数据库类型 -->
<property name="database" value="MYSQL"/>
<!-- 正向工程 自动创建表 -->
<!--<property name="generateDdl" value="true"/>-->
<!-- 显示执行的SQL -->
<property name="showSql" value="true"/>
</bean>
</property>
<!-- 扫描实体的包 -->
<property name="packagesToScan">
<list>
<value>fly</value>
</list>
</property>
</bean>
<!-- 配置Hibernate的事务管理器 -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<!--===============================================================-->标签：username,criteriaQuery,springdata,spring,笔记,session,User,org 来源： https://www.cnblogs.com/fly-book/p/10409006.html