设置属性值时出错（Spring 3和mybatis 3）

我的应用程序使用Spring3+Mybatis3。我正在尝试设置多个数据库连接（MySQL和Oracle），我收到了这条消息

Error creating bean with name 'MySQLService' defined in ServletContext resource [/WEB-INF/appContext-database.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'MySQLDao' of bean class [com.ekalife.MyGadget.service.MainService]: Bean property 'MySQLDao' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

我的安装程序appContext-database.xml

<!-- ========== Setting Database and Connection Pooling ========== -->

<bean id="dataSourceMySQL" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close" 
    p:driverClass="${jdbc.driver}" 
    p:jdbcUrl="${jdbc.url}" 
    p:user="${jdbc.user}" 
    p:password="${jdbc.password}" 
    p:idleConnectionTestPeriod="3600" 
    p:preferredTestQuery="SELECT * FROM HD_USERS" 
    p:acquireRetryAttempts="50" 
    p:autoCommitOnClose="false" /> 

<bean id="dataSourceORA" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"
    p:driverClass="${jdbc.driverORA}"
    p:jdbcUrl="${jdbc.urlORA}"
    p:user="${jdbc.userORA}"
    p:password="${jdbc.passwordORA}"
    p:idleConnectionTestPeriod="3600"
    p:preferredTestQuery="SELECT SYSDATE FROM DUAL"
    p:acquireRetryAttempts="50"
    p:autoCommitOnClose="false"/>

<!-- transaction manager -->
<bean id="MySQLService" class=" com.ekalife.MyGadget.service.MainService">
    <property name="MySQLDao" ref="MySQLDao"/>
</bean>

<bean id="ORAService" class=" com.ekalife.MyGadget.service.OraService">
    <property name="ORADao" ref="ORADao"/>
</bean>

<!-- MySQL transactional advice -->
<tx:advice id="mySqlTxAdvice" transaction-manager="transactionManagerMySQL">
    <tx:attributes>
        <tx:method name="select" read-only="true" />
        <tx:method name="view" read-only="true" />
        <tx:method name="*" />
    </tx:attributes>
</tx:advice>
<aop:config>
    <aop:pointcut id="mySQLManagerMethods" expression="execution(* com.ekalife.MyGadget.service.MainService.*(..))"/>
    <aop:advisor advice-ref="mySqlTxAdvice" pointcut-ref="mySQLManagerMethods" />
</aop:config>
<bean id="transactionManagerMySQL" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSourceMySQL" />
</bean>

<!-- Oracle transactional advice -->
<tx:advice id="oraTxAdvice" transaction-manager="transactionManagerORA">
    <tx:attributes>
        <tx:method name="select" read-only="true" />
        <tx:method name="view" read-only="true" />
        <tx:method name="*" />
    </tx:attributes>
</tx:advice>
<aop:config>
    <aop:pointcut id="oraManagerMethods" expression="execution(* com.ekalife.MyGadget.service.OraService.*(..))" />
    <aop:advisor advice-ref="oraTxAdvice" pointcut-ref="oraManagerMethods" />
</aop:config>
<bean id="transactionManagerORA" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSourceORA"/>
</bean>

<bean id="MySQLDao" class="org.mybatis.spring.SqlSessionFactoryBean"
    p:dataSource-ref="dataSourceMySQL"
    p:mapperLocations="classpath*:com/ekalife/MyGadget/dao/MySQL/**/*.xml"
    p:typeAliasesPackage="com.ekalife.MyGadget.model" />
<bean id="MySQLDaoSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
    <constructor-arg ref="MySQLDao"/>
</bean>

<bean id="ORADao" class="org.mybatis.spring.SqlSessionFactoryBean"
    p:dataSource-ref="dataSourceORA" 
    p:mapperLocations="classpath*:com/ekalife/MyGadget/dao/Ora/**/*.xml"
    p:typeAliasesPackage="com.ekalife.MyGadget.model" />
<bean id="ORADaoSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
    <constructor-arg ref="ORADao"/>
</bean>

<bean id="MySQLMapper" class="org.mybatis.spring.mapper.MapperFactoryBean" 
    p:sqlSessionTemplate-ref="MySQLDaoSessionTemplate"
    p:mapperInterface="com.ekalife.MyGadget.dao.MainMapper"
    p:sqlSessionFactory-ref="MySQLDao"/>
<bean id="ORAMapper" class="org.mybatis.spring.mapper.MapperFactoryBean" 
    p:sqlSessionTemplate-ref="ORADaoSessionTemplate"
    p:mapperInterface="com.ekalife.MyGadget.dao.OraMapper"
    p:sqlSessionFactory-ref="ORADao"/>  

甲骨文服务

@Transactional
public class OraService {

    private static Logger logger = Logger.getLogger(MainService.class);

    @Autowired
    private OraMapper oraMapper;

---

提前感谢：）

您应该在

MainService

及其setter和getter中声明

MySQLDao

，因为Spring正在寻找它

另一个错误是变量名应以lowcase开头：

<bean id="MySQLService" class=" com.ekalife.MyGadget.service.MainService">
    <property name="mySQLDao" ref="MySQLDao"/>
</bean>

---

升级：回答您的问题“如何在MainService中声明MySQLDao”

---

出现错误的主要原因是您没有Mainservice和OraService类的getter和setter。Spring错误它甚至告诉您in-away“不可写或具有无效的setter方法”。

但我在服务类中看不到具有mysqldao的属性及其setter方法：（，它是否与@transaction相关？或者应该是，它必须是@Transactional（“mysqldao”）公共类MainService？如何在MainService中声明MySQLDao？有没有一种在Spring中设置多个连接（mysql和oracle）的简单方法？请参阅我的更新，了解如何声明MySQLDao。没有一种在Spring中声明两个数据源的简单方法，至少正如您所期望的那样。我收到了另一条消息“使用ServletContext资源[/WEB-INF/appContext database.xml]中定义的名称'MySQLService'创建bean时出错”：bean初始化失败；嵌套异常为org.springframework.beans.ConversionNotSupportedException:未能将类型为“org.apache.ibatis.session.defaults.DefaultSqlSessionFactory”的属性值转换为属性“mySQLDao”所需的类型“org.mybatis.spring.SqlSessionFactoryBean”：未找到匹配的编辑器或转换策略“看看这些包。类名是相同的，但包不是。你需要解决这个问题。在我的例子中，映射程序包是com.ekalife.MyGadget.dao.MainMapper，服务包是com.ekalife.MyGadget.service.MainService；映射程序是否必须在com.ekalife.MyGadget.service中？因为我制作了另一个appContext-database.xml（没有aop或tx）仅适用于oracle或mysql，并且运行良好。

<bean id="MySQLService" class=" com.ekalife.MyGadget.service.MainService">
    <property name="mySQLDao" ref="MySQLDao"/>
</bean>

<bean id="MySQLService" class=" com.ekalife.MyGadget.service.MainService">
    <property name="mySQLDao" ref="MySQLDao"/>
    <property name="mainMapper" ref="MySQLMapper"/>
</bean>

package com.ekalife.MyGadget.service;

// imports...

@Transactional
public class MainService {

    private static Logger logger = Logger.getLogger(MainService.class);

    private MainMapper mainMapper;

    private SqlSessionFactoryBean mySQLDao;

    // your methods

    // setter and getter methods for mySQLDao and mainMapper

}