二 Spring整合Hibernate-Spring整合Hibernate步驟

本Spring Data系列的內容均是根據百戰程序員關於Sping Data視頻編寫而成。

一創建項目導入jar包

1.1 新建Maven項目（01-spring-data-hibernate）

1.2 修改pom.xml文件

<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.bjsxt</groupId>
	<artifactId>01-spring-data-hibernate</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<properties>
		<spring.version>4.3.23.RELEASE</spring.version>
		<hibernate.version>5.1.17.Final</hibernate.version>
		<mysql.version>5.1.47</mysql.version>
		<c3p0.version>0.9.2.1</c3p0.version>
		<junit.version>4.12</junit.version>
		<lombok.version>1.18.6</lombok.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
			<version>${spring.version}</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-orm</artifactId>
			<version>${spring.version}</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>${spring.version}</version>
		</dependency>

		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-core</artifactId>
			<version>${hibernate.version}</version>
		</dependency>

		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>${mysql.version}</version>
		</dependency>

		<dependency>
			<groupId>com.mchange</groupId>
			<artifactId>c3p0</artifactId>
			<version>${c3p0.version}</version>
		</dependency>

		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>${junit.version}</version>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<version>${lombok.version}</version>
			<scope>provided</scope>
		</dependency>

	</dependencies>
</project>

二定義Spring整合Hibernate的配置文件

2.1 添加jdbc.properties文件

jdbc.url=jdbc:mysql://localhost:3306/spring-data-test?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT
#jdbc.url=jdbc:mysql://localhost:3306/spring-data-test 這個保存到數據庫中會導致亂碼
jdbc.driver.class=com.mysql.jdbc.Driver
jdbc.username=root
jdbc.password=123456

2.2 添加applicationContext.xml文件

<?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:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx" 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/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

	<!-- 配置讀取properties文件的工具類 -->
	<context:property-placeholder location="classpath:jdbc.properties" />

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

	<!-- 配置hibernate的sessionFactory -->
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<!-- hibernateProperties屬性：配置與hibernate相關內容，如顯示sql語句，開啓正向工程 -->
		<property name="hibernateProperties">
			<value>
				<!-- hibernate.dialect=org.hibernate.dialect.HSQLDialect -->
				<!-- 顯示當前執行的sql -->
				hibernate.show_sql=true
				<!-- 開啓正向工程 -->
				hibernate.hbm2ddl.auto=update
			</value>
		</property>
		<!-- 掃描實體所在的包 -->
		<property name="packagesToScan">
			<list>
				<value>com.bjsxt.pojo</value>
			</list>
		</property>
	</bean>

	<!-- 配置hibernate的事務管理器 -->
	<bean id="transactionManager"
		class="org.springframework.orm.hibernate5.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory" />
	</bean>

	<!-- 配置開啓註解事務處理 -->
	<tx:annotation-driven transaction-manager="transactionManager"/>

	<!-- 配置springIOC的註解掃描 -->
	<context:component-scan base-package="com.bjsxt"></context:component-scan>
</beans>

三通過Hibernate完成CRUD操作

3.1 創建數據庫（spring-data-test）

CREATE DATABASE `spring-data-test` CHARACTER SET 'utf8' COLLATE 'utf8_general_ci';

3.2 創建Users實體類

package com.bjsxt.pojo;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

import lombok.Data;

@Entity
@Table(name="ts_users")
@Data
public class Users implements Serializable{
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	@Id
	@GeneratedValue(strategy=GenerationType.IDENTITY)
	@Column(name="id")
	private Long id;
	
	@Column(name="user_name")
	private String userName;
	
	@Column(name="age")
	private Integer age;
}

3.3 編寫UsersDao接及其實現類

3.3.1 修改applicationContext.xml配置文件，添加HibernateTemplate的配置

	<!-- 配置HibernateTemplate對象 -->
	<bean id="hibernateTemplate" class="org.springframework.orm.hibernate5.HibernateTemplate">
		<property name="sessionFactory" ref="sessionFactory" />
	</bean>

3.3.2 編寫UsersDao接口

package com.bjsxt.dao;

import com.bjsxt.pojo.Users;

public interface UsersDao {
	void insertUsers(Users users);
	
	void updateUsers(Users users);
	
	void deleteUsers(Users users);
	
	Users selectUserById(Long id);
}

3.3.3 編寫實現類

package com.bjsxt.dao.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.stereotype.Repository;

import com.bjsxt.dao.UsersDao;
import com.bjsxt.pojo.Users;

@Repository
public class UsersDaoImpl implements UsersDao {
	
	@Autowired
	private HibernateTemplate hibernateTemplate;

	public void insertUsers(Users users) {
		this.hibernateTemplate.save(users);
	}

	public void updateUsers(Users users) {
		this.hibernateTemplate.update(users);
	}

	public void deleteUsers(Users users) {
		this.hibernateTemplate.delete(users);
	}

	public Users selectUserById(Long id) {
		return this.hibernateTemplate.get(Users.class, id);
	}

}

3.4 編寫測試類

package com.bjsxt.dao.impl;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.annotation.Rollback;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.transaction.annotation.Transactional;

import com.bjsxt.dao.UsersDao;
import com.bjsxt.pojo.Users;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class UsersDaoImplTest {
	
	@Autowired
	private UsersDao userDao;

	/**
	 * 執行結果：
	 	Hibernate: create table ts_users (id bigint not null auto_increment, age integer, user_name varchar(255), primary key (id))
		四月 28, 2019 10:12:33 上午 org.springframework.orm.hibernate5.HibernateTransactionManager afterPropertiesSet
		信息: Using DataSource [com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, dataSourceName -> 1hge0z0a2r41tzootyzcc|61862a7f, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> com.mysql.jdbc.Driver, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> 1hge0z0a2r41tzootyzcc|61862a7f, idleConnectionTestPeriod -> 0, initialPoolSize -> 3, jdbcUrl -> jdbc:mysql://localhost:3306/spring-data-test, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 0, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 15, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 3, numHelperThreads -> 3, preferredTestQuery -> null, properties -> {user=******, password=******}, propertyCycle -> 0, statementCacheNumDeferredCloseThreads -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, userOverrides -> {}, usesTraditionalReflectiveProxies -> false ]] of Hibernate SessionFactory for HibernateTransactionManager
		四月 28, 2019 10:12:33 上午 org.springframework.test.context.transaction.TransactionContext startTransaction
		信息: Began transaction (1) for test context [DefaultTestContext@4aeaadc1 testClass = UsersDaoImplTest, testInstance = com.bjsxt.dao.impl.UsersDaoImplTest@263558c9, testMethod = testInsertUsers@UsersDaoImplTest, testException = [null], mergedContextConfiguration = [MergedContextConfiguration@3c8bdd5b testClass = UsersDaoImplTest, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]]; transaction manager [org.springframework.orm.hibernate5.HibernateTransactionManager@52eacb4b]; rollback [true]
		Hibernate: insert into ts_users (age, user_name) values (?, ?)
		但是雖然有insert 語句但是表裏並沒有對應的記錄生成，原因是在測試類中對於事務提交方式默認的是回滾的
		解決辦法（注意：只有在測試類中）：
		在添加@Rollback(false)註解
		但是會亂碼，解決辦法如下：
		在jdbc.properties中修改jdbc.url配置爲jdbc.url=jdbc:mysql://localhost:3306/spring-data-test?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT
	 */
	@Test
	@Transactional
	@Rollback(false)
	public void testInsertUsers() {
		Users users = new Users();
		users.setAge(18);
		users.setUserName("路飛");
		this.userDao.insertUsers(users);
	}

	/**
	 * 執行結果：
		信息: Began transaction (1) for test context [DefaultTestContext@7de4a01f testClass = UsersDaoImplTest, testInstance = com.bjsxt.dao.impl.UsersDaoImplTest@2bfeb1ef, testMethod = testUpdateUsers@UsersDaoImplTest, testException = [null], mergedContextConfiguration = [MergedContextConfiguration@5167268 testClass = UsersDaoImplTest, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]]; transaction manager [org.springframework.orm.hibernate5.HibernateTransactionManager@d816dde]; rollback [false]
		Hibernate: update ts_users set age=?, user_name=? where id=?
		四月 28, 2019 10:25:42 上午 org.springframework.test.context.transaction.TransactionContext endTransaction
	 */
	@Test
	@Transactional
	@Rollback(false)
	public void testUpdateUsers() {
		Users users = new Users();
		users.setId(5l);
		users.setAge(28);
		users.setUserName("路飛-海賊王");
		this.userDao.updateUsers(users);
	}
	
	/**
	 * 執行結果：
	 	信息: Began transaction (1) for test context [DefaultTestContext@2bfeb1ef testClass = UsersDaoImplTest, testInstance = com.bjsxt.dao.impl.UsersDaoImplTest@778ca8ef, testMethod = testDeleteUsers@UsersDaoImplTest, testException = [null], mergedContextConfiguration = [MergedContextConfiguration@1cfd1875 testClass = UsersDaoImplTest, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]]; transaction manager [org.springframework.orm.hibernate5.HibernateTransactionManager@6e33c391]; rollback [false]
		Hibernate: delete from ts_users where id=?
		四月 28, 2019 10:28:55 上午 org.springframework.test.context.transaction.TransactionContext endTransaction
	 */
	@Test
	@Transactional
	@Rollback(false)
	public void testDeleteUsers() {
		Users users = new Users();
		users.setId(2l);
		this.userDao.deleteUsers(users);
	}

	/**
	 * 執行結果：
		Hibernate: select users0_.id as id1_0_0_, users0_.age as age2_0_0_, users0_.user_name as user_nam3_0_0_ from ts_users users0_ where users0_.id=?
		Users(id=5, userName=路飛-海賊王, age=28)
	 */
	@Test
	public void testSelectUserById() {
		Users users = this.userDao.selectUserById(5l);
		System.out.println(users);
	}

}

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