java笔记：自己动手写javaEE框架（五）--Spring事务管理学习
上篇文章写到了编程式事务的使用TransactionTemplate类的实现，TransactionTemplate类里的execute方法需要TransactionCallback接口实现类做参数，其接口的定义中只包含一个doInTransaction方法用于执行事务操作，上面的代码中使用匿名类的方式定义TransactionCallback接口实现，并且在doInTransaction()方法中定义事务处理代码。
第五章 声明式事务管理
我们使用最多的还是Spring声明式事务管理，其实所有Spring事务管理都是基于AOP来实现，而其中的声明式事务才是真正体现AOP全部优点的最佳应用，记得我以前参加面试一说到AOP我就提及声明式事务管理，哎，那个时候对AOP的理解也就仅限于此，太菜了。Spring声明式事务不涉及组件的依赖关系，使用它时候不需要编写任何代码，很大程度的节省了工作量，提高了工作效率。下面我在我的框架里面加入声明式事务，首先修改applicationContext.xml配置文件，代码如下：
<?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: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-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">
<!-- 扫描该路径下的spring组件 -->
<context:component-scan base-package="cn.com.sharpxiajun" />
<!-- 读取资源文件 -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:conf/constants.properties</value>
</list>
</property>
</bean>
<!-- 配置数据源 -->
<!-- <bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${db.driverClass}"/>
<property name="jdbcUrl" value="${db.jdbcUrl}"/>
<property name="user" value="${db.user}"/>
<property name="password" value="${db.password}"/>
</bean>-->
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${db.driverClass}"/>
<property name="url" value="${db.jdbcUrl}"/>
<property name="username" value="${db.user}"/>
<property name="password" value="${db.password}"/>
</bean>
<bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
<property name="configLocation">
<value>classpath:conf/SqlMapConfig.xml</value>
</property>
<property name="dataSource" ref="myDataSource"/>
</bean>
<bean id="sqlMapClientTemplate" class="org.springframework.orm.ibatis.SqlMapClientTemplate">
<property name="sqlMapClient">
<ref local="sqlMapClient"/>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource">
<ref local="myDataSource"/>
</property>
</bean>
<!-- 声明式事务 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="get*" read-only="true" propagation="REQUIRED"/>
<tx:method name="query*" read-only="true" propagation="REQUIRED"/>
<tx:method name="find*" read-only="true" propagation="REQUIRED"/>
<tx:method name="list*" read-only="true" propagation="REQUIRED"/>
<tx:method name="search*" read-only="true" propagation="REQUIRED"/>
<tx:method name="add*" propagation="REQUIRED" isolation="READ_COMMITTED"/>
<tx:method name="insert*" propagation="REQUIRED" isolation="READ_COMMITTED"/>
<tx:method name="del*" propagation="REQUIRED" isolation="READ_COMMITTED"/>
<tx:method name="save*" propagation="REQUIRED" isolation="READ_COMMITTED"/>
<tx:method name="update*" propagation="REQUIRED" isolation="READ_COMMITTED"/>
<tx:method name="modify*" propagation="REQUIRED" isolation="READ_COMMITTED"/>
</tx:attributes>
</tx:advice>
<bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
<property name="transactionManager">
<ref bean="transactionManager"/>
</property>
<property name="propagationBehaviorName">
<value>PROPAGATION_REQUIRED</value>
</property>
</bean>
<!-- 将我自己定义的拦截器生成bean -->
<bean id="methodServiceAdvisor" class="cn.com.sharpxiajun.common.aop.MethodServiceAdvisor"/>
<aop:config>
<!--配置规则，满足以下规则的将拦截，第一个*表示所有返回类型，第二个表示service包下的所有class，第三个表示所有方法-->
<aop:pointcut id="baseServiceMethods" expression="execution(* cn.com.sharpxiajun.service.*.*(..))"/>
<!-- 声明式事务 -->
<aop:advisor advice-ref="txAdvice" pointcut-ref="baseServiceMethods" />
<!-- 符合上面规则的拦截器都会调用到methodServiceAdvisor -->
<aop:advisor advice-ref="methodServiceAdvisor" pointcut-ref="baseServiceMethods"/>
</aop:config>
</beans>
这里面添加了<tx:advice id="txAdvice" transaction-manager="transactionManager">，根据方法前缀不同绑定不同的事务策略，然后在<aop:config>里面添加<aop:advisor advice-ref="txAdvice" pointcut-ref="baseServiceMethods" />，那么service包下面类里的方法都会绑定相应的事务管理。在javaEE工程里面到底是DAO层绑定事务还是在Service层绑定事务？这个问题以前有同事问过我，我当时回答是都应该绑定，现在我会说最好只在Service层绑定事务。DAO层在我的理解里应该是数据库操作的映射，那是针对数据的原子操作，而Service层则是把这些各种数据库操作封装成一个业务操作单元，所以Service层的含义更符合事务本质，所以事务最好绑定在Service层。DAO层再绑定事务没必要，而且多余，甚至还会操作不必要的错误。
接下来我修改USERS.xml映射文件，代码如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sqlMap PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN" "http://ibatis.apache.org/dtd/sql-map-2.dtd">
<sqlMap namespace="USERS">
<select id="queryUserList" parameterClass="java.util.Map" resultClass="java.util.HashMap">
select t.username,t.password,t.enabled from users t
</select>
<!-- 新增用户信息 -->
<insert id="addUsers" parameterClass="java.util.Map">
insert into users
<dynamic prepend="(">
<isNotNull prepend="," property="username">
username
</isNotNull>
<isNotNull prepend="," property="password">
password
</isNotNull>
<isNotNull prepend="," property="enabled">
enabled
</isNotNull>
)
</dynamic>
values
<dynamic prepend="(">
<isNotNull prepend="," property="username">
#username:VARCHAR#
</isNotNull>
<isNotNull prepend="," property="password">
#password:VARCHAR#
</isNotNull>
<isNotNull prepend="," property="enabled">
#enabled:NUMBER#
</isNotNull>
)
</dynamic>
</insert>
</sqlMap>
修改cn.com.sharpxiajun.dao包下的接口UsersDao，代码如下：
package cn.com.sharpxiajun.dao;
import java.util.List;
import java.util.Map;
public interface UsersDao {
public static final String QUERY_USERS_SQL = "USERS.queryUserList";
public static final String ADD_USERS_SQL = "USERS.addUsers";
public List<Map<String, Object>> queryUserList(Map<String, Object> map) throws Exception;
public Object addUsers(Map<String, Object> map) throws Exception;
}
修改cn.com.sharpxiajun.dao.impl包下面UsersDaoImpl类，代码如下：
package cn.com.sharpxiajun.dao.impl;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Scope;
import org.springframework.orm.ibatis.SqlMapClientTemplate;
import org.springframework.stereotype.Repository;
import cn.com.sharpxiajun.dao.UsersDao;
@SuppressWarnings("unchecked")
@Scope("prototype")
@Repository("usersDao")
public class UsersDaoImpl implements UsersDao {
@Autowired
@Qualifier("sqlMapClientTemplate")
private SqlMapClientTemplate sqlMapClientTemplate = null;
public List<Map<String, Object>> queryUserList(Map<String, Object> map)
throws Exception {
return sqlMapClientTemplate.queryForList(QUERY_USERS_SQL, map);
}
@Override
public Object addUsers(Map<String, Object> map) throws Exception {
return sqlMapClientTemplate.insert(ADD_USERS_SQL, map);
}
}
修改cn.com.sharpxiajun.service包下接口UsersService，代码如下：
package cn.com.sharpxiajun.service;
import java.util.List;
import java.util.Map;
public interface UsersService {
public List<Map<String, Object>> queryUsersList(Map<String, Object> map) throws Exception;
public Object addUsers(Map<String, Object> map) throws Exception;
}
修改cn.com.sharpxiajun.service.impl包下类UsersServiceImpl，代码如下：
package cn.com.sharpxiajun.service.impl;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Service;
import cn.com.sharpxiajun.dao.UsersDao;
import cn.com.sharpxiajun.service.UsersService;
@SuppressWarnings("unchecked")
@Scope("prototype")
@Service("userService")
public class UsersServiceImpl implements UsersService {
@Autowired
@Qualifier("usersDao")
private UsersDao usersDao = null;
@Override
public List<Map<String, Object>> queryUsersList(Map<String, Object> map)
throws Exception {
return usersDao.queryUserList(map);
}
@Override
public Object addUsers(Map<String, Object> map) throws Exception {
return usersDao.addUsers(map);
}
}
修改cn.com.sharpxiajun.junittest.service包下测试类UsersServiceImplTest，代码如下：
package cn.com.sharpxiajun.junittest.service;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractTransactionalJUnit4SpringContextTests;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.transaction.TransactionConfiguration;
import cn.com.sharpxiajun.service.UsersService;
import cn.com.sharpxiajun.service.impl.UsersServiceImpl;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:conf/applicationContext.xml"})
@TransactionConfiguration(defaultRollback = false)
public class UsersServiceImplTest extends
AbstractTransactionalJUnit4SpringContextTests {
private final static Log log = LogFactory.getLog(UsersServiceImpl.class);
@Autowired
private UsersService usersService = null;
public UsersServiceImplTest()
{
System.out.println("初始化测试类....");
}
@Before
public void setUp() throws Exception
{
System.out.println("测试开始....");
}
@After
public void tearDown() throws Exception
{
System.out.println("测试结束!!");
}
@Test
public void testQueryUserList()
{
Map<String, Object> map = new HashMap<String, Object>();
map.put("username", "sharpxiajun");
try {
List<Map<String, Object>> list = usersService.queryUsersList(map);
log.info(list);
} catch (Exception e) {
e.printStackTrace();
}
}
@Test
public void testAddUsers()
{
Map<String, Object> map = new HashMap<String, Object>();
map.put("username", "xiajun");
map.put("password", "xiajun");
map.put("enabled", 1);
try {
Object obj = usersService.addUsers(map);
log.info("testAddUsers:" + obj);
} catch (Exception e) {
e.printStackTrace();
}
}
}
运行测试类,结果如下：
数据新增了，但是没有体现事务的作用，我前面写事务示例代码也没有考虑到如何表现事务的作用，为了体现事务作用，我在USERS.xml配置文件里添加新方法,代码如下：
<!-- 修改用户信息 -->
<update id="updateUsers" parameterClass="java.util.Map">
update users set errinfo = 'error'
</update>
修改cn.com.sharpxiajun.dao包下的UsersDao接口，代码如下：
package cn.com.sharpxiajun.dao;
import java.util.List;
import java.util.Map;
public interface UsersDao {
public static final String QUERY_USERS_SQL = "USERS.queryUserList";
public static final String ADD_USERS_SQL = "USERS.addUsers";
public static final String UPDATE_USERS_SQL = "USERS.updateUsers";
public List<Map<String, Object>> queryUserList(Map<String, Object> map) throws Exception;
public Object addUsers(Map<String, Object> map) throws Exception;
public Object updateUsers(Map<String, Object> map) throws Exception;
}
修改cn.com.sharpxiajun.dao.impl包下的UsersDaoImpl类，代码如下：
package cn.com.sharpxiajun.dao.impl;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Scope;
import org.springframework.orm.ibatis.SqlMapClientTemplate;
import org.springframework.stereotype.Repository;
import cn.com.sharpxiajun.dao.UsersDao;
@SuppressWarnings("unchecked")
@Scope("prototype")
@Repository("usersDao")
public class UsersDaoImpl implements UsersDao {
@Autowired
@Qualifier("sqlMapClientTemplate")
private SqlMapClientTemplate sqlMapClientTemplate = null;
public List<Map<String, Object>> queryUserList(Map<String, Object> map)
throws Exception {
return sqlMapClientTemplate.queryForList(QUERY_USERS_SQL, map);
}
@Override
public Object addUsers(Map<String, Object> map) throws Exception {
return sqlMapClientTemplate.insert(ADD_USERS_SQL, map);
}
@Override
public Object updateUsers(Map<String, Object> map) throws Exception {
return sqlMapClientTemplate.update(UPDATE_USERS_SQL, map);
}
}
在cn.com.sharpxiajun.service包的UsersService接口里添加方法：
public void updateUsers(Map<String, Object> map) throws Exception;
在cn.com.sharpxiajun.service.impl下的UsersServiceImpl类里实现该方法，代码如下：
@Override
public void updateUsers(Map<String, Object> map) throws Exception {
usersDao.addUsers(map);
usersDao.updateUsers(map);
}
从上面代码可以看出USERS.xml的update方法是不能被执行，程序一定会报出异常，如果方法绑定了事务，那么usersDao.addUsers(map);操作会被回滚掉，也就是新增操作不会成功，下面我在cn.com.sharpxiajun.junittest.service包下的UsersServiceImplTest类里添加新的测试方法，代码如下：
@Test
public void testUpdateUsers()
{
Map<String, Object> map = new HashMap<String, Object>();
map.put("username", "sharp");
map.put("password", "sharp");
map.put("enabled", 1);
try {
usersService.updateUsers(map);
} catch (Exception e) {
e.printStackTrace();
}
}
（注意：最好把测试新增方法的代码注释掉）
运行测试类，控制台会打印出下面异常：
2011-10-25 23:10:59 SQLErrorCodesFactory - SQLErrorCodes loaded: [DB2, Derby, H2, HSQL, Informix, MS-SQL, MySQL, Oracle, PostgreSQL, Sybase]
org.springframework.jdbc.BadSqlGrammarException: SqlMapClient operation; bad SQL grammar []; nested exception is com.ibatis.common.jdbc.exception.NestedSQLException:
--- The error occurred in cn/com/sharpxiajun/dao/sqlmap/USERS.xml.
--- The error occurred while applying a parameter map.
--- Check the USERS.updateUsers-InlineParameterMap.
--- Check the statement (update failed).
--- Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'errinfo' in 'field list'
at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:233)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)
at org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:203)
at org.springframework.orm.ibatis.SqlMapClientTemplate.update(SqlMapClientTemplate.java:378)
at cn.com.sharpxiajun.dao.impl.UsersDaoImpl.updateUsers(UsersDaoImpl.java:36)
at cn.com.sharpxiajun.service.impl.UsersServiceImpl.updateUsers(UsersServiceImpl.java:45)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at cn.com.sharpxiajun.common.aop.MethodServiceAdvisor.invoke(MethodServiceAdvisor.java:31)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy18.updateUsers(Unknown Source)
at cn.com.sharpxiajun.junittest.service.UsersServiceImplTest.testUpdateUsers(UsersServiceImplTest.java:103)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:240)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:180)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: com.ibatis.common.jdbc.exception.NestedSQLException:
--- The error occurred in cn/com/sharpxiajun/dao/sqlmap/USERS.xml.
--- The error occurred while applying a parameter map.
--- Check the USERS.updateUsers-InlineParameterMap.
--- Check the statement (update failed).
--- Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'errinfo' in 'field list'
at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeUpdate(MappedStatement.java:107)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.update(SqlMapExecutorDelegate.java:457)
at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.update(SqlMapSessionImpl.java:90)
at org.springframework.orm.ibatis.SqlMapClientTemplate$9.doInSqlMapClient(SqlMapClientTemplate.java:380)
at org.springframework.orm.ibatis.SqlMapClientTemplate$9.doInSqlMapClient(SqlMapClientTemplate.java:1)
at org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:200)
... 49 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'errinfo' in 'field list'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.Util.getInstance(Util.java:381)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1031)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3376)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3308)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1837)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1961)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2543)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1737)
at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:998)
at org.apache.commons.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:169)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.ibatis.common.jdbc.logging.PreparedStatementLogProxy.invoke(PreparedStatementLogProxy.java:62)
at $Proxy21.execute(Unknown Source)
at com.ibatis.sqlmap.engine.execution.SqlExecutor.executeUpdate(SqlExecutor.java:80)
at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.sqlExecuteUpdate(MappedStatement.java:216)
at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeUpdate(MappedStatement.java:94)
... 54 more
测试结束!!
2011-10-25 23:10:59 TestContextManager - Caught exception while allowing TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener@6798eb] to process 'after' execution for test: method [public void cn.com.sharpxiajun.junittest.service.UsersServiceImplTest.testUpdateUsers()], instance [cn.com.sharpxiajun.junittest.service.UsersServiceImplTest@168989e], exception [null]
org.springframework.transaction.UnexpectedRollbackException: Transaction rolled back because it has been marked as rollback-only
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:717)
at org.springframework.test.context.transaction.TransactionalTestExecutionListener$TransactionContext.endTransaction(TransactionalTestExecutionListener.java:516)
at org.springframework.test.context.transaction.TransactionalTestExecutionListener.endTransaction(TransactionalTestExecutionListener.java:291)
at org.springframework.test.context.transaction.TransactionalTestExecutionListener.afterTestMethod(TransactionalTestExecutionListener.java:184)
at org.springframework.test.context.TestContextManager.afterTestMethod(TestContextManager.java:406)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:90)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:240)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:180)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
结果如下：
没有新的记录被添加，事务被成功绑定了~~~。
那么如果我们写在Service里面的方法没有用applicationContext.xml里面设置的前缀，效果会如何了？
我在cn.com.sharpxiajun.service包的UsersService接口下添加新方法，代码如下：
public void noTransactionMethod(Map<String, Object> map) throws Exception;
在cn.com.sharpxiajun.service.impl包里UsersServiceImpl类实现该方法，代码如下：
@Override
public void noTransactionMethod(Map<String, Object> map) throws Exception {
usersDao.addUsers(map);
usersDao.updateUsers(map);
}
最后在cn.com.sharpxiajun.junittest.service包下，修改UsersServiceImplTest测试类，代码如下：
// @Test
// public void testAddUsers()
// {
// Map<String, Object> map = new HashMap<String, Object>();
// map.put("username", "xiajun");
// map.put("password", "xiajun");
// map.put("enabled", 1);
//
// try {
// Object obj = usersService.addUsers(map);
// log.info("testAddUsers:" + obj);
// } catch (Exception e) {
// e.printStackTrace();
// }
// }
@Test
public void testNoTransactionMethod()
{
Map<String, Object> map = new HashMap<String, Object>();
map.put("username", "sharp");
map.put("password", "sharp");
map.put("enabled", 1);
try {
usersService.noTransactionMethod(map);
} catch (Exception e) {
e.printStackTrace();
}
}
// @Test
// public void testUpdateUsers()
// {
// Map<String, Object> map = new HashMap<String, Object>();
// map.put("username", "sharp");
// map.put("password", "sharp");
// map.put("enabled", 1);
//
// try {
// usersService.updateUsers(map);
// } catch (Exception e) {
// e.printStackTrace();
// }
// }
运行测试类，控制台打印出的异常是：
2011-10-25 23:28:00 SQLErrorCodesFactory - SQLErrorCodes loaded: [DB2, Derby, H2, HSQL, Informix, MS-SQL, MySQL, Oracle, PostgreSQL, Sybase]
org.springframework.jdbc.BadSqlGrammarException: SqlMapClient operation; bad SQL grammar []; nested exception is com.ibatis.common.jdbc.exception.NestedSQLException:
--- The error occurred in cn/com/sharpxiajun/dao/sqlmap/USERS.xml.
--- The error occurred while applying a parameter map.
--- Check the USERS.updateUsers-InlineParameterMap.
--- Check the statement (update failed).
--- Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'errinfo' in 'field list'
at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:233)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)
at org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:203)
at org.springframework.orm.ibatis.SqlMapClientTemplate.update(SqlMapClientTemplate.java:378)
at cn.com.sharpxiajun.dao.impl.UsersDaoImpl.updateUsers(UsersDaoImpl.java:36)
at cn.com.sharpxiajun.service.impl.UsersServiceImpl.noTransactionMethod(UsersServiceImpl.java:38)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at cn.com.sharpxiajun.common.aop.MethodServiceAdvisor.invoke(MethodServiceAdvisor.java:31)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy18.noTransactionMethod(Unknown Source)
at cn.com.sharpxiajun.junittest.service.UsersServiceImplTest.testNoTransactionMethod(UsersServiceImplTest.java:88)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:240)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:180)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: com.ibatis.common.jdbc.exception.NestedSQLException:
--- The error occurred in cn/com/sharpxiajun/dao/sqlmap/USERS.xml.
--- The error occurred while applying a parameter map.
--- Check the USERS.updateUsers-InlineParameterMap.
--- Check the statement (update failed).
--- Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'errinfo' in 'field list'
at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeUpdate(MappedStatement.java:107)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.update(SqlMapExecutorDelegate.java:457)
at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.update(SqlMapSessionImpl.java:90)
at org.springframework.orm.ibatis.SqlMapClientTemplate$9.doInSqlMapClient(SqlMapClientTemplate.java:380)
at org.springframework.orm.ibatis.SqlMapClientTemplate$9.doInSqlMapClient(SqlMapClientTemplate.java:1)
at org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:200)
... 49 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'errinfo' in 'field list'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.Util.getInstance(Util.java:381)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1031)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3376)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3308)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1837)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1961)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2543)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1737)
at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:998)
at org.apache.commons.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:169)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.ibatis.common.jdbc.logging.PreparedStatementLogProxy.invoke(PreparedStatementLogProxy.java:62)
at $Proxy21.execute(Unknown Source)
at com.ibatis.sqlmap.engine.execution.SqlExecutor.executeUpdate(SqlExecutor.java:80)
at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.sqlExecuteUpdate(MappedStatement.java:216)
at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeUpdate(MappedStatement.java:94)
... 54 more
我们发现这里面少了事务回滚的异常，数据库查询结果如下：
有记录被新增了~~~
第六章 通过注解绑定事务管理
声明式事务咋看一下还是十分简单的，但是Spring引入注解后还有更加简单的配置，请看修改后新的applicationContext.xml配置文件：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">
<!-- 扫描该路径下的spring组件 -->
<context:component-scan base-package="cn.com.sharpxiajun" />
<!-- 读取资源文件 -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:conf/constants.properties</value>
</list>
</property>
</bean>
<!-- 配置数据源 -->
<!-- <bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${db.driverClass}"/>
<property name="jdbcUrl" value="${db.jdbcUrl}"/>
<property name="user" value="${db.user}"/>
<property name="password" value="${db.password}"/>
</bean>-->
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${db.driverClass}"/>
<property name="url" value="${db.jdbcUrl}"/>
<property name="username" value="${db.user}"/>
<property name="password" value="${db.password}"/>
</bean>
<bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
<property name="configLocation">
<value>classpath:conf/SqlMapConfig.xml</value>
</property>
<property name="dataSource" ref="myDataSource"/>
</bean>
<bean id="sqlMapClientTemplate" class="org.springframework.orm.ibatis.SqlMapClientTemplate">
<property name="sqlMapClient">
<ref local="sqlMapClient"/>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource">
<ref local="myDataSource"/>
</property>
</bean>
<!-- 声明式事务 -->
<!-- <tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="get*" read-only="true" propagation="REQUIRED"/>
<tx:method name="query*" read-only="true" propagation="REQUIRED"/>
<tx:method name="find*" read-only="true" propagation="REQUIRED"/>
<tx:method name="list*" read-only="true" propagation="REQUIRED"/>
<tx:method name="search*" read-only="true" propagation="REQUIRED"/>
<tx:method name="add*" propagation="REQUIRED" isolation="READ_COMMITTED"/>
<tx:method name="insert*" propagation="REQUIRED" isolation="READ_COMMITTED"/>
<tx:method name="del*" propagation="REQUIRED" isolation="READ_COMMITTED"/>
<tx:method name="save*" propagation="REQUIRED" isolation="READ_COMMITTED"/>
<tx:method name="update*" propagation="REQUIRED" isolation="READ_COMMITTED"/>
<tx:method name="modify*" propagation="REQUIRED" isolation="READ_COMMITTED"/>
</tx:attributes>
</tx:advice>-->
<bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
<property name="transactionManager">
<ref bean="transactionManager"/>
</property>
<property name="propagationBehaviorName">
<value>PROPAGATION_REQUIRED</value>
</property>
</bean>
<!-- 将我自己定义的拦截器生成bean -->
<bean id="methodServiceAdvisor" class="cn.com.sharpxiajun.common.aop.MethodServiceAdvisor"/>
<aop:config>
<!--配置规则，满足以下规则的将拦截，第一个*表示所有返回类型，第二个表示service包下的所有class，第三个表示所有方法-->
<aop:pointcut id="baseServiceMethods" expression="execution(* cn.com.sharpxiajun.service.*.*(..))"/>
<!-- 声明式事务 -->
<!-- <aop:advisor advice-ref="txAdvice" pointcut-ref="baseServiceMethods" />-->
<!-- 符合上面规则的拦截器都会调用到methodServiceAdvisor -->
<aop:advisor advice-ref="methodServiceAdvisor" pointcut-ref="baseServiceMethods"/>
</aop:config>
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
配置文件里我把原来的声明式配置内容注释掉了，然后加入了<tx:annotation-driven transaction-manager="transactionManager"/>。
然后在cn.com.sharpxiajun.service.impl包下的UsersServiceImpl类加入@Transactional注解，代码如下：
@SuppressWarnings("unchecked")
@Scope("prototype")
@Transactional
@Service("userService")
public class UsersServiceImpl implements UsersService {
......................................................
将数据库里的数据都清除掉，运行测试类UsersServiceImplTest，测试service下的noTransactionMethod方法和updateUsers方法，结果显示数据都没有新增成功，这就说明事务绑定是成功了，这个简单吧。
总结下了：事务很重要，我希望我这两篇博客能给童鞋们一点帮助。
下一篇文章将把struts2框架引入到我写的框架。
