前面整合maven和spring3,struts2,這篇整合hibernate。
1.下載Hibernate4需要的jar包
在pom.xml文件中編寫Hibernate4所需要的jar包,Maven會自動下載這些包。
<!-- hibernate4 -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.1.7.Final</version>
</dependency>
注意:一定要排除掉Struts2中的javassist,否則就衝突了。
也就是將pom.xml裏配置strust2內取消這段代碼註釋:
<exclusions>
<exclusion>
<groupId>javassist</groupId>
<artifactId>javassist</artifactId>
</exclusion>
</exclusions>
2.添加數據庫驅動包
這裏我用的數據庫是mysql
<!-- mysql驅動包 -->
2 <dependency>
3 <groupId>mysql</groupId>
4 <artifactId>mysql-connector-java</artifactId>
5 <version>5.1.34</version>
6 </dependency>
3.添加數據庫連接池jar包
在平時開發中,我們一般都會使用數據庫連接池,應用系統初始化時,由數據庫連接池向數據庫申請一定數量的數據庫連接,然後放到一個連接池中,當需要操作數據庫時,就從數據庫連接池中取出一個數據庫連接,通過從連接池中獲取到的數據庫連接對象連接上數據庫,然後進行CRUD操作,關於數據庫連接池的選擇,常用的有DBCP,C3P0和Druid,這裏我們使用Druid作爲我們的數據庫連接池。
在pom.xml文件中編寫Druid的jar包,Maven會自動下載,如下:
<!--Druid連接池包 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.12</version>
</dependency>
4.添加aspectjweaver包
使用Spring的aop時需要使用到aspectjweaver包,所以需要添加aspectjweaver包,在pom.xml文件中添加aspectjweaver的jar包,Maven會自動下載,如下:
<!--aspectjweaver包 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.5</version>
</dependency>
5、編寫連接數據庫的配置信息
之前我們在src/main/resources目錄下創建了一個config.properties文件,裏面的內容是空的,現在我們就在這個config.properties文件中編寫連接數據庫需要使用到的相關信息,如下所示:
#hibernate.dialect=org.hibernate.dialect.OracleDialect
#driverClassName=oracle.jdbc.driver.OracleDriver
#validationQuery=SELECT 1 FROM DUAL
#jdbc_url=jdbc:oracle:thin:@127.0.0.1:1521:orcl
#jdbc_username=sshe
#jdbc_password=sshe
hibernate.dialect=org.hibernate.dialect.MySQLDialect
driverClassName=com.mysql.jdbc.Driver
validationQuery=SELECT 1
jdbc_url=jdbc:mysql://localhost:3306/ssh?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
jdbc_username=root
jdbc_password=18324
#hibernate.dialect=org.hibernate.dialect.SQLServerDialect
#driverClassName=net.sourceforge.jtds.jdbc.Driver
#validationQuery=SELECT 1
#jdbc_url=jdbc:jtds:sqlserver://127.0.0.1:1433/sy
#jdbc_username=sa
#jdbc_password=123456
#jndiName=java:comp/env/dataSourceName
hibernate.hbm2ddl.auto=update
hibernate.show_sql=true
hibernate.format_sql=true
sessionInfoName=sessionInfo
uploadFieldName=filedata
uploadFileMaxSize=20971520
uploadFileExts=txt,rar,zip,doc,docx,xls,xlsx,jpg,jpeg,gif,png,swf,wmv,avi,wma,mp3,mid
uploadDirectory=attached
這裏的jdbc_url=jdbc:mysql://localhost:3306/ssh?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull代碼,3306後面是數據庫名ssh。
在src/main/resources目錄下新建一個spring-hibernate.xml文件,如下圖所示:
內容如下:
<?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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
">
<!-- JNDI方式配置數據源 -->
<!-- <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName" value="${jndiName}"></property> </bean> -->
<!-- 配置數據源 -->
<bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<property name="url" value="${jdbc_url}" />
<property name="username" value="${jdbc_username}" />
<property name="password" value="${jdbc_password}" />
<!-- 初始化連接大小 -->
<property name="initialSize" value="0" />
<!-- 連接池最大使用連接數量 -->
<property name="maxActive" value="20" />
<!-- 連接池最大空閒 -->
<property name="maxIdle" value="20" />
<!-- 連接池最小空閒 -->
<property name="minIdle" value="0" />
<!-- 獲取連接最大等待時間 -->
<property name="maxWait" value="60000" />
<!-- <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="33" /> -->
<property name="validationQuery" value="${validationQuery}" />
<property name="testOnBorrow" value="false" />
<property name="testOnReturn" value="false" />
<property name="testWhileIdle" value="true" />
<!-- 配置間隔多久才進行一次檢測,檢測需要關閉的空閒連接,單位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<!-- 配置一個連接在池中最小生存的時間,單位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="25200000" />
<!-- 打開removeAbandoned功能 -->
<property name="removeAbandoned" value="true" />
<!-- 1800秒,也就是30分鐘 -->
<property name="removeAbandonedTimeout" value="1800" />
<!-- 關閉abanded連接時輸出錯誤日誌 -->
<property name="logAbandoned" value="true" />
<!-- 監控數據庫 -->
<!-- <property name="filters" value="stat" /> -->
<property name="filters" value="mergeStat" />
</bean>
<!-- 配置hibernate session工廠 -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
<prop key="hibernate.format_sql">${hibernate.format_sql}</prop>
</props>
</property>
<!-- 自動掃描註解方式配置的hibernate類文件 -->
<property name="packagesToScan">
<list>
<value>sy.model</value>
</list>
</property>
<!-- 自動掃描hbm方式配置的hibernate文件和.hbm文件 -->
<!--
<property name="mappingDirectoryLocations">
<list>
<value>classpath:sy/hbm</value>
</list>
</property>
-->
</bean>
<!-- 配置事務管理器 -->
<bean name="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<!-- 註解方式配置事物 -->
<!-- <tx:annotation-driven transaction-manager="transactionManager" /> -->
<!-- 攔截器方式配置事物 -->
<tx:advice id="transactionAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="add*" />
<tx:method name="save*" />
<tx:method name="update*" />
<tx:method name="modify*" />
<tx:method name="edit*" />
<tx:method name="delete*" />
<tx:method name="remove*" />
<tx:method name="repair" />
<tx:method name="deleteAndRepair" />
<tx:method name="get*" propagation="SUPPORTS" />
<tx:method name="find*" propagation="SUPPORTS" />
<tx:method name="load*" propagation="SUPPORTS" />
<tx:method name="search*" propagation="SUPPORTS" />
<tx:method name="datagrid*" propagation="SUPPORTS" />
<tx:method name="*" propagation="SUPPORTS" />
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="transactionPointcut" expression="execution(* sy.service..*Impl.*(..))" />
<aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" />
</aop:config>
</beans>
7、編寫單元測試代碼
1、在MySQL中創建ssh數據庫
SQL腳本:
CREATE DATABASE ssh;
2.在src/main/java中創建sy.model包,在包中編寫一個 Tuer類,如下圖所示:
Tuser內容:
package sy.model;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.UniqueConstraint;
/**
* Tuser entity. @author MyEclipse Persistence Tools
*/
@Entity
@Table(name = "TUSER", schema = "ssh", uniqueConstraints = @UniqueConstraint(columnNames = "NAME"))
public class Tuser implements java.io.Serializable {
// Fields
private String id;
private String name;
private String pwd;
private Date createdatetime;
private Date modifydatetime;
// Constructors
/** default constructor */
public Tuser() {
}
/** minimal constructor */
public Tuser(String id, String name, String pwd) {
this.id = id;
this.name = name;
this.pwd = pwd;
}
/** full constructor */
public Tuser(String id, String name, String pwd, Date createdatetime, Date modifydatetime) {
this.id = id;
this.name = name;
this.pwd = pwd;
this.createdatetime = createdatetime;
this.modifydatetime = modifydatetime;
}
// Property accessors
@Id
@Column(name = "ID", unique = true, nullable = false, length = 36)
public String getId() {
return this.id;
}
public void setId(String id) {
this.id = id;
}
@Column(name = "NAME", unique = true, nullable = false, length = 100)
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
@Column(name = "PWD",length = 32)
public String getPwd() {
return this.pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
@Temporal(TemporalType.TIMESTAMP)
@Column(name = "CREATEDATETIME", length = 7)
public Date getCreatedatetime() {
return this.createdatetime;
}
public void setCreatedatetime(Date createdatetime) {
this.createdatetime = createdatetime;
}
@Temporal(TemporalType.TIMESTAMP)
@Column(name = "MODIFYDATETIME", length = 7)
public Date getModifydatetime() {
return this.modifydatetime;
}
public void setModifydatetime(Date modifydatetime) {
this.modifydatetime = modifydatetime;
}
}
3、在src/main/java中創建sy.dao包,在包中編寫一個 UserDaoI接口,如下圖所示:
代碼如下:
package sy.dao;
import java.io.Serializable;
import sy.model.Tuser;
public interface UserDaoI {
/**
* 保存用戶
* @param user
* @return
*/
Serializable save(Tuser user);
}
在src/main/java中創建sy.dao.impl包,在包中編寫 UserDaoImpl實現類,如下圖所示:
代碼:
package sy.dao.impl;
import java.io.Serializable;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import sy.dao.UserDaoI;
import sy.model.Tuser;
@Repository("userDao")
public class UserDaoImpl implements UserDaoI{
/**
* 使用@Autowired註解將sessionFactory注入到UserDaoImpl中
*/
@Autowired
private SessionFactory sessionFactory;
@Override
public Serializable save(Tuser user) {
// TODO Auto-generated method stub
return this.sessionFactory.getCurrentSession().save(user);
}
}
這裏使用@Repository(“userDao”)註解完成dao注入, 使用@Autowired註解將sessionFactory注入到UserDaoImpl中。
4、在之前創建好的UserServiceI接口中添加一個save方法的定義,如下:
package sy.service;
import java.io.Serializable;
import sy.model.Tuser;
public interface UserserviceI {
public void test1();
Serializable save(Tuser user);
}
5、在UserServiceImpl類中實現save方法,如下:
package sy.service.impl;
import java.io.Serializable;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import sy.dao.UserDaoI;
import sy.model.Tuser;
import sy.service.UserserviceI;
//使用Spring提供的@Service註解將UserServiceImpl標註爲一個Service
@Service("userService")
public class UserserviceImpl implements UserserviceI {
/**
* 注入userDao
*/
private UserDaoI userDao;
public UserDaoI getUserDao() {
return userDao;
}
@Autowired
public void setUserDao(UserDaoI userDao) {
this.userDao = userDao;
}
public void test1() {
System.out.print("ssss");
}
@Override
public Serializable save(Tuser user) {
// TODO Auto-generated method stub
return userDao.save(user);
}
}
6、在src/main/test下的me.gacl.test包中編寫 TestHibernate類,代碼如下:
package yf.test;
import java.util.Date;
import java.util.UUID;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import sy.model.Tuser;
import sy.service.UserserviceI;
public class TestHibernate {
private UserserviceI userService;
/**
* 這個before方法在所有的測試方法之前執行,並且只執行一次
* 所有做Junit單元測試時一些初始化工作可以在這個方法裏面進行
* 比如在before方法裏面初始化ApplicationContext和userService
*/
@Before
public void before(){
ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"spring.xml","spring-hibernate.xml"});
userService = (UserserviceI) ac.getBean("userService");
}
@Test
public void testSaveMethod(){
//ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"spring.xml","spring-hibernate.xml"});
//UserServiceI userService = (UserServiceI) ac.getBean("userService");
Tuser user = new Tuser();
user.setId(UUID.randomUUID().toString().replaceAll("-", ""));
user.setName("yy");
user.setPwd("123456");
user.setCreatedatetime(new Date());
userService.save(user);
}
}
執行Junit單元測試,如下所示:
測試通過,再看看sshe數據庫,如下圖所示:
Hibernate在執行過程中,先幫我們在ssh數據庫中創建一張tuser表,tuser的表結構根據Tuser實體類中的屬性定義來創建的,然後再將數據插入到tuser表中.
tuser表數據如下圖所示:
到此,Hibernate4開發環境的搭建並且與Spring整合的工作算是全部完成並且測試通過了。
**注意:如果你執行maven install ,將TestSpring裏的內容註釋,否則會報錯:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘userDao’。**