開發環境:
System:Windows
WebBrowser:IE6+、Firefox3+
JavaEE Server:tomcat5.0.2.8、tomcat6
IDE:eclipse、MyEclipse 8
Database:MySQL
開發依賴庫:
JavaEE5、Spring 3.0.5、Mybatis 3.0.4、myBatis-spring-1.0、Struts2.2.3、junit4.8.2、ext2.2.2
Email:[email protected]
Blog:http://blog.csdn.net/IBM_hoojo
上次介紹過Spring3、SpringMVC、MyBatis3整合,在線博文:http://www.cnblogs.com/hoojo/archive/2011/04/15/2016324.html
一、準備工作
1、 下載jar包
Struts2 jar下載:
http://labs.renren.com/apache-mirror//struts/library/struts-2.2.3-lib.zip
Spring3 jar下載:
MyBatis3 jar 下載:http://www.mybatis.org/java.html
2、 添加的jar包如下:
二、Spring、MyBatis整合
1、 需要的jar文件如下:
2、 在src目錄中加入mybatis.xml,內容如下:
xml version="1.0" encoding="UTF-8" ?>
DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<-- 別名 -->
<typeAliases>
<typeAlias type="com.hoo.entity.Account" alias="account"/>
typeAliases>
configuration>
上面的配置文件中,可以加入一些公共、常用的MyBatis方面的全局配置。如handler、objectFactory、plugin、以及mappers的映射路徑(由於在applicationContext-common中的SqlSessionFactoryBean有配置mapper的location,這裏就不需要配置)等。這個類的文件名稱和下面的applicationContext-common.xml中的configLocation中的值對應,不是隨便寫的。
3、 在src目錄中添加applicationContext-common.xml中加入內容如下:
xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd ">
<-- 配置DataSource數據源 -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://10.0.0.131:3306/ash2"/>
<property name="username" value="dev"/>
<property name="password" value="dev"/>
bean>
<-- 配置SqlSessionFactoryBean -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis.xml"/>
<-- mapper和resultmap配置路徑 -->
<property name="mapperLocations">
<list>
<-- 表示在com.hoo.resultmap包或以下所有目錄中,以-resultmap.xml結尾所有文件 -->
<value>classpath:com/hoo/resultmap/**/*-resultmap.xmlvalue>
<value>classpath:com/hoo/entity/*-resultmap.xmlvalue>
<value>classpath:com/hoo/mapper/**/*-mapper.xmlvalue>
list>
property>
bean>
<-- 配置事務管理器,注意這裏的dataSource和SqlSessionFactoryBean的dataSource要一致,不然事務就沒有作用了 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
bean>
<-- 配置事務的傳播特性 -->
<bean id="baseTransactionProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" abstract="true">
<property name="transactionManager" ref="transactionManager" />
<property name="transactionAttributes">
<props>
<prop key="add*">PROPAGATION_REQUIREDprop>
<prop key="edit*">PROPAGATION_REQUIREDprop>
<prop key="remove*">PROPAGATION_REQUIREDprop>
<prop key="insert*">PROPAGATION_REQUIREDprop>
<prop key="update*">PROPAGATION_REQUIREDprop>
<prop key="del*">PROPAGATION_REQUIREDprop>
<prop key="*">readOnlyprop>
props>
property>
bean>
<-- 通過掃描的模式,掃描目錄在com/hoo/mapper目錄下,所有的mapper都繼承SqlMapper接口的接口, 這樣一個bean就可以了 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.hoo.mapper"/>
<property name="markerInterface" value="com.hoo.mapper.SqlMapper"/>
bean>
beans>
DataSource,這裏的是採用jdbc的dataSource;
SqlSessionFactory,是MyBatis團隊提供整合Spring的SqlSession工廠Bean用它可以完成Spring和MyBatis的整合。SqlSessionFactoryBean需要注入DataSource,配置myBatis配置文件的location,以及配置mapper.xml和resultMap.xml文件的路徑,可以用通配符模式配置。其實mapper裏面是可以存放resultMap的內容的。由於resultMap文件的內容是和JavaBean及數據庫表對象進行映射的。一般一張表、一個JavaBean(Model)對應一個resultMap文件。將resultMap獨立出來提供可讀性、維護性。
TransactionManager,事務管理器是採用jdbc的管理器。需要注入DataSource數據源,這裏注入的數據源和SqlSessionFactory是同一個數據源。如果不同的數據源,事務將無法起到作用。
baseTransactionProxy,事務的傳播特性纔有spring提供的TransactionProxyFactoryBean這個事務代理工廠的攔截器類來完成。其他的暫時還沒有可以支持事務配置的傳播特性和隔離級別的方法,關於這裏你可以參考:http://www.cnblogs.com/hoojo/archive/2011/04/15/2017447.html
MapperScannerConfigurer是MyBatis的mapper接口的掃描器,通過這個配置可以完成對指定basePackage報下的類進行掃描,如果這些類有繼承SqlMapper這個類的,將會是MyBatis的接口。不需要單獨配置mapper,而完成注入。
4、 在src目錄添加applicationContext-beans.xml這個文件,文件內容如下:
xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<-- 註解探測器 -->
<context:component-scan base-package="com.hoo"/>
beans>
這裏面可以完成一下Action、Bean的注入配置
5、 JavaBean(Model、Entity)相關類、及resultMap.xml文件內容
Bean
package com.hoo.entity;
import java.io.Serializable;
import java.util.Date;
public class Account implements Serializable {
private static final long serialVersionUID = -7970848646314840509L;
private Integer accountId;
private String username;
private String password;
private Date createTime;
public Account() {
super();
}
//getter、setter
@Override
public String toString() {
return this.accountId + "#" + this.username + "#" + this.password + "#" + this.createTime;
}
}
account-resultMap.xml
xml version="1.0" encoding="UTF-8"?>
DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="accountMap">
<resultMap type="com.hoo.entity.Account" id="accountResultMap">
<id property="accountId" column="account_id"/>
<result property="username" column="username"/>
<result property="password" column="password"/>
<result property="createTime" column="create_time"/>
resultMap>
mapper>
resultMap的type屬性和對應的classpath對應,id會在mapper.xml文件中用到。下面的屬性property是JavaBean的屬性,column和數據庫的字段對應。
6、 上面的applicationContext-common.xml中配置了SqlMapper,下面是SqlMapper代碼,就一個空接口
package com.hoo.mapper;
/**
* function:所有的Mapper繼承這個接口
* @author hoojo
* @createDate 2011-4-12 下午04:00:31
* @file SqlMapper.java
* @package com.hoo.mapper
* @project MyBatisForSpring
* @blog http://blog.csdn.net/IBM_hoojo
* @email [email protected]
* @version 1.0
*/
public interface SqlMapper {
}
7、 定製我們自己的增刪改查(CRUD)組件,接口如下
package com.hoo.mapper;
import java.util.List;
import org.springframework.dao.DataAccessException;
/**
* function: BaseSqlMapper繼承SqlMapper,對Mapper進行接口封裝,提供常用的增刪改查組件;
* 也可以對該接口進行擴展和封裝
* @author hoojo
* @createDate 2011-4-14 上午11:36:41
* @file BaseSqlMapper.java
* @package com.hoo.mapper
* @project MyBatisForSpring
* @blog http://blog.csdn.net/IBM_hoojo
* @email [email protected]
* @version 1.0
*/
public interface BaseSqlMapper<T> extends SqlMapper {
public void add(T entity) throws DataAccessException;
public void edit(T entity) throws DataAccessException;
public void remvoe(T entity) throws DataAccessException;
public T get(T entity) throws DataAccessException;
public List<T> getList(T entity) throws DataAccessException;
}
當然實際開發中,增刪改查組件一定不止這幾個方法。這裏只是隨便挪列幾個方法做一個示例。實際中可以根據需求進行添加方法,這裏添加的方法可以用一個mapper.xml進行實現,然後注入這個mapper即可完成操作。也可以定義其他的mapper,如AccountMapper繼承這個接口。然後爲AccountMapper提供實現也是可以的。
8、 下面看看AccountMapper接口
package com.hoo.mapper;
import java.util.List;
import com.hoo.entity.Account;
/**
* function:繼承SqlMapper,MyBatis數據操作接口;此接口無需實現類
* @author hoojo
* @createDate 2010-12-21 下午05:21:20
* @file AccountMapper.java
* @package com.hoo.mapper
* @project MyBatis
* @blog http://blog.csdn.net/IBM_hoojo
* @email [email protected]
* @version 1.0
*/
public interface AccountMapper<T extends Account> extends BaseSqlMapper<T> {
public List<T> getAllAccount();
}
上面的AccountMapper繼承了BaseSqlMapper,並且提供了自己所需要的方法。下面實現這個Mapper中和父接口的方法。
account-mapper.xml
xml version="1.0" encoding="UTF-8"?>
DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<-- namespace和定義的Mapper接口對應,並實現其中的方法 -->
<mapper namespace="com.hoo.mapper.AccountMapper">
<select id="getList" parameterType="com.hoo.entity.Account" resultType="list" resultMap="accountResultMap">
select * from account where username like '%' #{username} '%'
select>
<select id="getAllAccount" resultType="list" resultMap="accountResultMap">
select * from account
select>
<-- accountResultMap是account-resultmap.xml中定義的resultmap -->
<select id="get" parameterType="account" resultType="com.hoo.entity.Account" resultMap="accountResultMap">
[CDATA[
select * from account where account_id = #{accountId}
]]>
select>
<-- 自動生成id策略 -->
<insert id="add" useGeneratedKeys="true" keyProperty="account_id" parameterType="account">
insert into account(account_id, username, password)
values(#{accountId}, #{username}, #{password})
insert>
<update id="edit" parameterType="account">
update account set
username = #{username},
password = #{password}
where account_id = #{accountId}
update>
<delete id="remove" parameterType="account">
delete from account where account_id = #{accountId}
delete>
mapper>
9、 下面來測試下AccountMapper的功能,代碼如下:
package com.hoo.mapper;
import java.util.List;
import javax.inject.Inject;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit38.AbstractJUnit38SpringContextTests;
import com.hoo.entity.Account;
/**
* function: AccountMapper JUnit測試類
* @author hoojo
* @createDate 2011-4-12 下午04:21:50
* @file AccountMapperTest.java
* @package com.hoo.mapper
* @project MyBatisForSpring
* @blog http://blog.csdn.net/IBM_hoojo
* @email [email protected]
* @version 1.0
*/
@ContextConfiguration("classpath:applicationContext-*.xml")
public class AccountMapperTest extends AbstractJUnit38SpringContextTests {
@Inject
private AccountMapper<Account> mapper;
public void testGetAccount() {
Account acc = new Account();
acc.setAccountId(28);
System.out.println(mapper.get(acc));
}
public void testAdd() {
Account account = new Account();
account.setUsername("lisi@155.com");
account.setPassword("abc");
mapper.add(account);
}
public void testEditAccount() {
Account acc = new Account();
acc.setAccountId(28);
acc = mapper.get(acc);
System.out.println(acc);
acc.setUsername("Zhangsan22");
acc.setPassword("123123");
mapper.edit(acc);
System.out.println(mapper.get(acc));
}
public void testRemoveAccount() {
Account acc = new Account();
acc.setAccountId(28);
mapper.remvoe(acc);
System.out.println(mapper.get(acc));
}
public void testAccountList() {
List<Account> acc = mapper.getAllAccount();
System.out.println(acc.size());
System.out.println(acc);
}
public void testList() {
Account acc = new Account();
acc.setUsername("@qq.com");
List<Account> list = mapper.getList(acc);
System.out.println(list.size());
System.out.println(list);
}
}
運行上面的方法,沒有錯誤基本上就算完成了Mapper的功能了。
10、 下面來寫一個數據庫操作的基類Dao,代碼如下:
package com.hoo.dao;
import java.util.List;
import com.hoo.mapper.BaseSqlMapper;
/**
* function:
* @author hoojo
* @createDate 2011-4-14 上午11:30:09
* @file BaseMapperDao.java
* @package com.hoo.dao
* @project MyBatisForSpring
* @blog http://blog.csdn.net/IBM_hoojo
* @email [email protected]
* @version 1.0
*/
public interface BaseMapperDao<T> {
@SuppressWarnings("unchecked")
public void setMapperClass(Class<? extends BaseSqlMapper> mapperClass);
public BaseSqlMapper<T> getMapper();
public boolean add(T entity) throws Exception;
public boolean edit(T entity) throws Exception;
public boolean remove(T entity) throws Exception;
public T get(T entity) throws Exception;
public List<T> getAll(T entity) throws Exception;
}
這個Dao定義了BaseSqlMapper中的方法,還提供了一個setMapperClass的方法。目的是在使用這個dao的時候,需要設置一個Mapper的class。且這個Mapper必須要是BaseSqlMapper或它的子類。所有的dao都可以用BaseMapperDao來完成CRUD操作即可,當BaseMapperDao的方法不夠用的情況下,可以在接口中提供SqlSession、SqlSessionTemplate方法,讓底層人員自己擴展所需要的方法。這裏的dao和mapper好像有點冗餘,因爲dao和mapper完成的功能都是類似或是相同的。但是你可以在dao中,同時調用不同的mapper,來完成當前模塊的dao所需要的功能。
11、 看看BaseMapperDao的實現代碼
package com.hoo.dao.impl;
import java.util.List;
import javax.inject.Inject;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.stereotype.Repository;
import com.hoo.dao.BaseMapperDao;
import com.hoo.mapper.BaseSqlMapper;
/**
* function:運用SqlSessionTemplate封裝Dao常用增刪改方法,可以進行擴展
* @author hoojo
* @createDate 2011-4-14 下午12:22:07
* @file BaseMapperDaoImpl.java
* @package com.hoo.dao.impl
* @project MyBatisForSpring
* @blog http://blog.csdn.net/IBM_hoojo
* @email [email protected]
* @version 1.0
*/
@SuppressWarnings("unchecked")
@Repository
public class BaseMapperDaoImpl<T> extends SqlSessionTemplate implements BaseMapperDao<T> {
@Inject
public BaseMapperDaoImpl(SqlSessionFactory sqlSessionFactory) {
super(sqlSessionFactory);
}
private Class<? extends BaseSqlMapper> mapperClass;
public void setMapperClass(Class<? extends BaseSqlMapper> mapperClass) {
this.mapperClass = mapperClass;
}
public BaseSqlMapper<T> getMapper() {
return this.getMapper(mapperClass);
}
public boolean add(T entity) throws Exception {
boolean flag = false;
try {
this.getMapper().add(entity);
flag = true;
} catch (Exception e) {
flag = false;
throw e;
}
return flag;
}
public boolean edit(T entity) throws Exception {
boolean flag = false;
try {
this.getMapper().edit(entity);
flag = true;
} catch (Exception e) {
flag = false;
throw e;
}
return flag;
}
public T get(T entity) throws Exception {
return this.getMapper().get(entity);
}
public List<T> getAll() throws Exception {
return this.getMapper().getList(null);
}
public boolean remove(T entity) throws Exception {
boolean flag = false;
try {
this.getMapper().remvoe(entity);
flag = true;
} catch (Exception e) {
flag = false;
throw e;
}
return flag;
}
}
這個實現類繼承了SqlSessionTemplate,並且要注入SqlSessionFactory。提供的setMapperClass方法需要設置其BaseSqlMapper或它的子類。
好了,至此基本的CRUD的mapper和dao就算完成了。現在我們可以定義我們自己的業務模塊,調用公共組件來完成增刪改查操作。
12、 下面測試下這個BaseMapperDao功能
package com.hoo.dao;
import javax.inject.Inject;
import org.junit.Before;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit38.AbstractJUnit38SpringContextTests;
import com.hoo.entity.Account;
import com.hoo.mapper.AccountMapper;
/**
* function:
* @author hoojo
* @createDate 2011-4-14 下午01:08:49
* @file BaseMapperDaoImplTest.java
* @package com.hoo.dao
* @project MyBatisForSpring
* @blog http://blog.csdn.net/IBM_hoojo
* @email [email protected]
* @version 1.0
*/
@ContextConfiguration("classpath:applicationContext-*.xml")
public class BaseMapperDaoImplTest extends AbstractJUnit38SpringContextTests {
@Inject
private BaseMapperDao<Account> dao;
@Before
public void init() {
System.out.println(dao);
dao.setMapperClass(AccountMapper.class);
}
public void testGet() throws Exception {
init();
Account acc = new Account();
acc.setAccountId(28);
System.out.println(dao.get(acc));
}
public void testAdd() throws Exception {
init();
Account account = new Account();
account.setUsername("temp@156.com");
account.setPassword("abc");
System.out.println(dao.add(account));
}
}
13、 下面定義AccountDao接口
package com.hoo.dao;
import java.util.List;
import org.springframework.dao.DataAccessException;
/**
* function: Account數據庫操作dao接口
* @author hoojo
* @createDate 2011-4-13 上午10:21:38
* @file AccountDao.java
* @package com.hoo.dao
* @project MyBatisForSpring
* @blog http://blog.csdn.net/IBM_hoojo
* @email [email protected]
* @version 1.0
*/
public interface AccountDao<T> {
/**
* function: 添加Account對象信息
* @author hoojo
* @createDate 2011-4-13 上午11:50:05
* @param entity Account
* @return boolean 是否成功
* @throws DataAccessException
*/
public boolean addAccount(T entity) throws DataAccessException;
/**
* function: 根據id對到Account信息
* @author hoojo
* @createDate 2011-4-13 上午11:50:45
* @param id 編號id
* @return Account
* @throws DataAccessException
*/
public T getAccount(Integer id) throws DataAccessException;
/**
* function: 查詢所有Account信息
* @author hoojo
* @createDate 2011-4-13 上午11:51:45
* @param id 編號id
* @return Account
* @throws DataAccessException
*/
public List<T> getList() throws DataAccessException;
}
14、 AccountDao實現類
package com.hoo.dao.impl;
import java.util.List;
import javax.inject.Inject;
import org.springframework.dao.DataAccessException;
import org.springframework.stereotype.Repository;
import com.hoo.dao.AccountDao;
import com.hoo.dao.BaseMapperDao;
import com.hoo.entity.Account;
import com.hoo.mapper.AccountMapper;
/**
* function: Account數據庫操作dao
* @author hoojo
* @createDate 2011-4-13 上午10:25:02
* @file AccountDaoImpl.java
* @package com.hoo.dao.impl
* @project MyBatisForSpring
* @blog http://blog.csdn.net/IBM_hoojo
* @email [email protected]
* @version 1.0
*/
@SuppressWarnings("unchecked")
@Repository
public class AccountDaoImpl<T extends Account> implements AccountDao<T> {
@Inject
private BaseMapperDao<Account> dao;
public boolean addAccount(T entity) throws DataAccessException {
dao.setMapperClass(AccountMapper.class);
boolean flag = false;
try {
dao.add(entity);
flag = true;
} catch (DataAccessException e) {
flag = false;
throw e;
} catch (Exception e) {
throw new RuntimeException(e);
}
return flag;
}
public T getAccount(Integer id) throws DataAccessException {
dao.setMapperClass(AccountMapper.class);
Account acc = new Account();
T entity = null;
try {
acc.setAccountId(id);
entity = (T) dao.get(acc);
} catch (DataAccessException e) {
throw e;
} catch (Exception e) {
throw new RuntimeException(e);
}
return entity;
}
public List<T> getList() throws DataAccessException {
dao.setMapperClass(AccountMapper.class);
List<T> list = null;
try {
list = (List<T>) ((AccountMapper)dao.getMapper()).getAllAcount();
} catch (DataAccessException e) {
throw e;
} catch (Exception e) {
throw new RuntimeException(e);
}
return list;
}
}
注意,上面的方法都設置了MapperClass,表示當前dao的Mapper是AccountMapper對象。所有的mapper方法都是調用AccountMapper這個對象中的方法。
15、 下面定義服務器層接口
package com.hoo.biz;
import java.util.List;
import org.springframework.dao.DataAccessException;
/**
* function: biz層Account接口
* @author hoojo
* @createDate 2011-4-13 上午11:33:04
* @file AccountBiz.java
* @package com.hoo.biz
* @project MyBatisForSpring
* @blog http://blog.csdn.net/IBM_hoojo
* @email [email protected]
* @version 1.0
*/
public interface AccountBiz<T> {
/**
* function: 添加Account對象信息
* @author hoojo
* @createDate 2011-4-13 上午11:50:05
* @param entity Account
* @return boolean 是否成功
* @throws DataAccessException
*/
public boolean addAccount(T entity) throws DataAccessException;
public boolean execute(T entity) throws DataAccessException;
/**
* function: 根據id對到Account信息
* @author hoojo
* @createDate 2011-4-13 上午11:50:45
* @param id 編號id
* @return Account
* @throws DataAccessException
*/
public T getAccount(Integer id) throws DataAccessException;
/**
* function: 查詢所有Account信息
* @author hoojo
* @createDate 2011-4-13 上午11:51:45
* @param id 編號id
* @return Account
* @throws DataAccessException
*/
public List<T> getList() throws DataAccessException;
}
16、 AccountBiz的實現代碼
package com.hoo.biz.impl;
import java.util.List;
import javax.inject.Inject;
import org.springframework.dao.DataAccessException;
import org.springframework.stereotype.Component;
import com.hoo.biz.AccountBiz;
import com.hoo.dao.AccountDao;
import com.hoo.entity.Account;
import com.hoo.exception.BizException;
/**
* function: Account Biz接口實現
* @author hoojo
* @createDate 2011-4-13 上午11:34:39
* @file AccountBizImpl.java
* @package com.hoo.biz.impl
* @project MyBatisForSpring
* @blog http://blog.csdn.net/IBM_hoojo
* @email [email protected]
* @version 1.0
*/
//@Component
@Service
public class AccountBizImpl<T extends Account> implements AccountBiz<T> {
@Inject
private AccountDao<T> dao;
public boolean addAccount(T entity) throws DataAccessException {
if (entity == null) {
throw new BizException(Account.class.getName() + "對象參數信息爲Empty!");
}
return dao.addAccount(entity);
}
public T getAccount(Integer id) throws DataAccessException {
return dao.getAccount(id);
}
public List<T> getList() throws DataAccessException {
return dao.getList();
}
public boolean execute(T entity) throws DataAccessException {
if (entity == null) {
throw new BizException(Account.class.getName() + "對象參數信息爲Empty!");
}
return dao.addAccount(entity);
}
}
直接注入AccountDao完成相關操作即可
17、 如果你需要在業務層設置事務傳播特性,需要在applicationContext-bean.xml中加入配置如下:
<-- 爲AccountBiz接口配置事務攔截器,baseTransactionProxy是事務攔截器,在Action中獲取這個對象 -->
<bean id="accountBiz" parent="baseTransactionProxy">
<-- 設置target,也就是AccountBiz的實現類 -->
<property name="target" ref="accountBizImpl"/>
bean>
這樣在Action中注入accountBiz這個對象後,那麼當這個對象出現DataAccessException異常的時候,就會自動回滾事務。
至此,Spring和MyBatis的整合就完成了。