} } }

    Spring3整合Hibernate4-我们到底能走多远系列(30)

    添加时间:2013-7-16 点击量:

    我们到底能走多远系列(30)


    扯淡:


      30篇啦!从2012-08-15开端的系列,东平西凑将近一年的时候也就这么几篇。目标的100篇,按这个速度也要再搞两年呢。


      发博客果真不是件轻易的事,怪不得更多的人愿意玩微博,125个字,写一个字也可以发了。


      向那些依然对峙稳定码博客的伴侣致敬!


    主题:


      用spring整合hibernate也算是java web开辟的入门必学的器材了,多年下来没怎么用过hibernate。


      所以记录下根蒂根基的整合常识,以及如何构建一些共通的代码,削减dao层的工作量。


      项目应用maven构建,关于maven的构建常识可以参考:摸我


      整合只应用了一个设备文件,hibernate方面应用注解体式格式映射数据库表。



    data-source.xml:




    <?xml version=1.0 encoding=UTF-8 ?>
    
    <beans xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance
    xmlns
    =http://www.springframework.org/schema/beans xmlns:context=http://www.springframework.org/schema/context
    xmlns:p
    =http://www.springframework.org/schema/p
    xmlns:jdbc
    =http://www.springframework.org/schema/jdbc
    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.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd

    default-autowire
    =byName>
    <context:component-scan base-package=com.sz.sh.dal.dao.hibernate,com.sz.sh.dal.dao.dateobject>
    </context:component-scan>
    <!-- 应用常规的BasicDataSource 来设备DataSource-->
    <bean id=shDataSource class=org.apache.commons.dbcp.BasicDataSource destroy-method=close>
    <property name=driverClassName value=com.mysql.jdbc.Driver />
    <property name=url value=¥{sh.jdbc.url} />
    <property name=username value=¥{sh.jdbc.username} />
    <property name=password value=¥{sh.jdbc.password} />
    <property name=initialSize value=1 />
    <property name=maxIdle value=30 />
    <property name=maxWait value=10000 />
    <property name=minIdle value=1 />
    <property name=removeAbandoned value=true />
    <property name=removeAbandonedTimeout value=180 />
    <!-- validate connection 检测设备 -->
    <property name=testWhileIdle value=true />
    <property name=testOnBorrow value=false />
    <property name=testOnReturn value=false />
    <property name=validationQuery>
    <value>SELECT @@SQL_MODE</value>
    </property>
    <property name=numTestsPerEvictionRun>
    <value>30</value>
    </property>
    <property name=timeBetweenEvictionRunsMillis>
    <value>60000</value>
    </property>
    <property name=minEvictableIdleTimeMillis>
    <value>1800000</value>
    </property>
    </bean>
    <bean id=transactionManager
    class
    =org.springframework.jdbc.datasource.DataSourceTransactionManager>
    <property name=dataSource ref=shDataSource />
    </bean>

    <bean id=transactionTemplate
    class
    =org.springframework.transaction.support.TransactionTemplate>
    <property name=transactionManager ref=transactionManager />
    </bean>
    <bean id=shSessionFactory
    class
    =org.springframework.orm.hibernate4.LocalSessionFactoryBean>
    <property name=dataSource ref=shDataSource />
    <property name=packagesToScan>
    <list>
    <value>com.sz.sh.dal.dao.dateobject</value>
    </list>
    </property>
    <!-- 若是用xml来描述hibernate的bean,就须要以下的设备
    <property name=mappingResources>
    <list>
    <value>cn/sh/model/user.hbm.xml</value>
    </list>
    </property>
    -->
    <property name=hibernateProperties>
    <props>
    <prop key=hibernate.default_schema>wxassistant</prop>
    <prop key=hibernate.dialect>org.hibernate.dialect.MySQLInnoDBDialect</prop>
    <prop key=hibernate.show_sql>true</prop>
    <prop key=hibernate.format_sql>true</prop>
    <prop key=hibernate.hbm2ddl.auto></prop>
    <prop key=hibernate.query.substitutions>false</prop>
    <prop key=hibernate.default_batch_fetch_size>20</prop>
    <prop key=hibernate.max_fetch_depth>2</prop>
    <prop key=hibernate.generate_statistics>true</prop>
    </props>
    </property>
    </bean>
    <aop:aspectj-autoproxy expose-proxy=true /><!-- 开启注解事务 只对当前设备文件有效 -->
    <tx:annotation-driven transaction-manager=txManager />
    <bean id=txManager
    class
    =org.springframework.orm.hibernate4.HibernateTransactionManager>
    <property name=sessionFactory ref=shSessionFactory />
    </bean>
    <tx:advice id=txAdvice transaction-manager=txManager>
    <tx:attributes>
    <tx:method name=save propagation=REQUIRED />
    <tx:method name=add propagation=REQUIRED />
    <tx:method name=create propagation=REQUIRED />
    <tx:method name= propagation=REQUIRED />
    <tx:method name= propagation=REQUIRED />
    <tx:method name=merge propagation=REQUIRED />
    <tx:method name=del propagation=REQUIRED />
    <tx:method name=remove propagation=REQUIRED />
    <tx:method name=put propagation=REQUIRED />
    <tx:method name=use propagation=REQUIRED />
    <tx:method name=get propagation=REQUIRED read-only=true />
    <tx:method name=count propagation=REQUIRED read-only=true />
    <tx:method name=find propagation=REQUIRED read-only=true />
    <tx:method name=list propagation=REQUIRED read-only=true />
    <tx:method name= propagation=REQUIRED read-only=true />
    </tx:attributes>
    </tx:advice>
    <aop:config expose-proxy=true><!-- 只对营业逻辑层实验事务 -->
    <aop:pointcut id=txPointcut
    expression
    =execution( com.sz.sh.dal.dao.hibernate..(..)) />
    <aop:advisor advice-ref=txAdvice pointcut-ref=txPointcut />
    </aop:config>
    <!--hibernate4必须设备为开启事务 不然 getCurrentSession()获取不到 -->
    <aop:config expose-proxy=true>
    <aop:pointcut id=basePointcut
    expression
    =execution( com.sz.sh.dal.common..(..)) />
    <aop:advisor advice-ref=txAdvice pointcut-ref=basePointcut />
    </aop:config>
    </beans>


    View Code

    项目目次布局:



    根蒂根基DAO:


    定义最根蒂根基的办法。



    public interface BaseDAO<M extends java.io.Serializable, PK extends java.io.Serializable> {
    

    public PK save(M model);

    public void saveOrUpdate(M model);

    public void (M model);

    public List<M> findByExample(M model);

    public List<M> findByCriterion(Criterion criterion, Order order, Integer offset, Integer length);

    public List<M> findByProperty(Map<String, Object> param, int offset, int length);

    public void merge(M model);

    public void (PK id);

    public boolean exists(PK id);

    public M get(PK id);

    public List<M> getALL();

    public Long countALL();
    }


    根蒂根基DAO实现:核心的实现类


    本抽象类中,实现了一些安主键查询,分页查询,添删改,等一些根蒂根基的操纵。


    并且,根蒂根基涵盖了一些常用的哄骗hibernate处理惩罚数据库的不合办法。



    /
    
    @0 getSession().createQuery HQL查询
    @1 getSession().createSQLQuery NATIVE sql 查询 应用 NATIVE sql可能呈现属性类型
    sess.createSQLQuery(SELECT FROM CATS).addScalar(ID, Hibernate.LONG).addScalar(NAME)
    sess.createSQLQuery(SELECT ID NAME, BIRTHDATE FROM CATS).addEntity(Cat.class
    @2 getSession().createCriteria Criteria 查询 @
    @param <M>
    @param <PK>
    /
    @MappedSuperclass
    public abstract class BaseDAOHib<M extends java.io.Serializable, PK extends java.io.Serializable> implements BaseDAO<M , PK>{

    protected static final Logger LOGGER = LoggerFactory.getLogger(BaseDAOHib.class);

    private Class<M> entityClass;
    private String HQL_LIST_ALL;
    private String HQL_COUNT_ALL;
    private String pkName = Id;

    @SuppressWarnings(
    unchecked
    public BaseDAOHib(){
    this.entityClass = (Class<M>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
    // TODO @Entity name not null
    HQL_LIST_ALL = + this.entityClass.getSimpleName() + order by + pkName + desc;
    HQL_COUNT_ALL
    = count() + this.entityClass.getSimpleName();
    }

    @Autowired
    @Qualifier(
    shSessionFactory
    private SessionFactory sessionFactory;

    public Session getSession() {
    // 事务必须是开启的(Required),不然获取不到
    return sessionFactory.getCurrentSession();
    }

    @SuppressWarnings(
    unchecked
    public PK save(M model) {
    return (PK) getSession().save(model);
    }

    public void saveOrUpdate(M model) {
    getSession().saveOrUpdate(model);
    }

    public void (M model) {
    getSession().(model);

    }

    public List<M> findByExample(M model) {
    List
    <M> results = getSession().createCriteria(this.entityClass).add(Example.create(model)).list();
    return results;
    }

    public List<M> findByCriterion(Criterion criterion, Order order, Integer offset, Integer length) {
    Criteria criteria
    = getSession().createCriteria(this.entityClass);
    criteria.add(criterion);

    if (order != null) {
    criteria.addOrder(order);
    }
    if (offset != null) {
    criteria.setFirstResult(offset);
    }
    if (length != null) {
    criteria.setMaxResults(length);
    }
    return criteria.list();
    }

    public List<M> findByProperty(Map<String, Object> param, int offset, int length) {

    StringBuffer queryString
    = new StringBuffer( + this.entityClass.getSimpleName() + where );
    List
    <Object> values = new ArrayList<Object>();
    boolean firstparam = true;
    for (Map.Entry<String, Object> entry : param.entrySet()) {
    values.add(entry.getValue());
    if (!firstparam) {
    queryString.append(
    and );
    }
    queryString.append(entry.getKey()
    + = ? );
    firstparam
    = false;
    }
    Query queryObject
    = getSession().createQuery(queryString.toString());

    forint i = 0; i < values.size(); i++) {
    queryObject.setParameter(
    0, values.get(i));
    }

    return queryObject.list();

    }

    public void merge(M model) {
    getSession().merge(model);
    }

    public void (PK id) {
    getSession().(
    this.get(id));

    }

    public boolean exists(PK id) {
    return get(id) != null;
    }

    public M get(PK id) {
    return (M) getSession().get(this.entityClass, id);
    }

    public List<M> getALL() {
    return getSession().createQuery(HQL_LIST_ALL).list();
    }

    public Long countALL() {
    return (Long) getSession().createQuery(HQL_COUNT_ALL).uniqueResult();
    }

    }



    具体对应表的DAO:重视持续BaseDAO 如许默认接口持续者实现根蒂根基类的共通办法。



    public interface CategoryDAO extends BaseDAO<CategoryDO,Long>{
    

    public List<CategoryDO> getAllCategory();

    public CategoryDO getCategoryById(Long id);
    }


    具体对应表的DAO接口持续者: 持续了根蒂根基DAO的实现,如许一来就不须要本身实现了。


    如此就实现了,所有对应表的DAO都公用了一份根蒂根基DAO实现。大大的削减了DAO层的开辟时候,降落了DAO层的bug率。



    @Repository(categoryDAO
    public class CategoryDAOHibernate extends BaseDAOHib<CategoryDO,Long> implements CategoryDAO{

    @Override
    public List<CategoryDO> getAllCategory() {
    return super.getALL();
    }

    @Override
    public CategoryDO getCategoryById(Long id) {
    return get(id);
    }
    }




    别的贴上pom.xml:




    <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>work</groupId>
    <artifactId>Spring_Hibernate</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>Spring_Hibernate</name>
    <url>http://maven.apache.org</url>

    <profiles>
    <!-- 开辟景象,默认激活 -->
    <profile>
    <id>dev</id>
    <properties>
    <env>dev</env>
    <maven.test.skip>true</maven.test.skip>
    </properties>
    <activation>
    <activeByDefault>true</activeByDefault>
    </activation>
    </profile>
    </profiles>

    <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <spring-version>3.1.1.RELEASE</spring-version>
    </properties>

    <dependencies>
    <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>3.8.1</version>
    <scope>test</scope>
    </dependency>
    <dependency>
    <groupId>commons-dbcp</groupId>
    <artifactId>commons-dbcp</artifactId>
    <version>1.2.2</version>
    </dependency>
    <dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.7.1</version>
    </dependency>
    <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.10</version>
    </dependency>
    <!-- ================================================= -->
    <!-- Spring框架 -->
    <!-- ================================================= -->
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>¥{spring-version}</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</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-context</artifactId>
    <version>¥{spring-version}</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context-support</artifactId>
    <version>¥{spring-version}</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</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-web</artifactId>
    <version>¥{spring-version}</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>¥{spring-version}</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>¥{spring-version}</version>
    </dependency>
    <dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-config</artifactId>
    <version>¥{spring-version}</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-orm</artifactId>
    <version>¥{spring-version}</version>
    </dependency>
    <!-- ================================================= -->
    <!-- Hibernate -->
    <!-- ================================================= -->
    <dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>4.1.9.Final</version>
    </dependency>

    <!-- ================================================= -->
    <!-- 日记及相干依附(用slf4j+logback庖代jcl+log4j) -->
    <!-- ================================================= -->
    <dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.6.1</version>
    </dependency>
    <!-- 将现有的jakarta commons logging的调用转换成lsf4j的调用。 -->
    <dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>jcl-over-slf4j</artifactId>
    <version>1.6.1</version>
    </dependency>
    <!-- Hack:确保commons-logging的jar包不被引入,不然将和jcl-over-slf4j冲突 -->
    <dependency>
    <groupId>commons-logging</groupId>
    <artifactId>commons-logging</artifactId>
    <version>1.1.1</version>
    <scope>provided</scope>
    </dependency>
    <!-- slf4j的实现:logback,用来庖代log4j。更快、更强! -->
    <dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>0.9.24</version>
    <scope>runtime</scope>
    </dependency>
    </dependencies>
    <build>

    <defaultGoal>install</defaultGoal>
    <filters>
    <filter>¥{user.dir}/env/filter-¥{env}.properties</filter>
    </filters>
    <resources>
    <resource>
    <directory>src/main/resources</directory>
    <filtering>true</filtering>
    </resource>
    </resources>

    </build>
    </project>


    View Code




    让我们持续前行


    ----------------------------------------------------------------------


    尽力不必然成功,但不尽力必然不会成功。
    共勉。

    原来,再大的房子,再大的床,没有相爱的人陪伴,都只是冰冷的物质。而如果身边有爱人陪伴,即使房子小,床小,也觉得无关紧要,因为这些物质上面有了爱的温度,成了家的元素。—— 何珞《婚房》#书摘#
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