原数据库是oracle的，现在在Mysql上建了个一样的，怎么改文件才能连接上数据库？
**现在尝试过：
1.只改url，driverClassName，username,password，之后tomcat就出问题了
2.我把下面这个xml删掉了，用建立数据库连接类的方法，错误是这样的
Struts Problem Report
Struts has detected an unhandled exception:
Messages: 1.Io ??: The Network Adapter could not establish the connection
2.Could not open JDBC Connection for transaction; nested exception is java.sql.SQLException: Io ??: The Network Adapter could not establish the connection
File: oracle/jdbc/driver/DatabaseError.java
Line number: 112 **
原来的applicationContext.xml是这样的：
<?xml version="1.0" encoding="UTF-8"?>
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"
xmlns:jaxws="http://cxf.apache.org/jaxws"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">
<!-- Scans the classpath of this application for @Components to deploy as beans -->
<context:component-scan base-package="cn.com.syis.hisol.hrms" />
<tx:annotation-driven transaction-manager="transactionManager"/>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="regist*" propagation="REQUIRED" isolation="READ_COMMITTED" read-only="false" rollback-for="java.lang.Exception" />
<tx:method name="insert*" propagation="REQUIRED" isolation="READ_COMMITTED" read-only="false" rollback-for="java.lang.Exception" />
<tx:method name="update*" propagation="REQUIRED" isolation="READ_COMMITTED" read-only="false" rollback-for="java.lang.Exception" />
<tx:method name="create*" propagation="REQUIRED" isolation="READ_COMMITTED" read-only="false" rollback-for="java.lang.Exception" />
<tx:method name="edit*" propagation="REQUIRED" isolation="READ_COMMITTED" read-only="false" rollback-for="java.lang.Exception" />
<tx:method name="delete*" propagation="REQUIRED" isolation="READ_COMMITTED" read-only="false" rollback-for="java.lang.Exception" />
<tx:method name="revise*" propagation="REQUIRED" isolation="READ_COMMITTED" read-only="false" rollback-for="java.lang.Exception"/>
<tx:method name="confirm*" propagation="REQUIRED" isolation="READ_COMMITTED" read-only="false" rollback-for="java.lang.Exception"/>
<tx:method name="cancel*" propagation="REQUIRED" isolation="READ_COMMITTED" read-only="false" rollback-for="java.lang.Exception"/>
<tx:method name="refuse*" propagation="REQUIRED" isolation="READ_COMMITTED" read-only="false" rollback-for="java.lang.Exception"/>
<tx:method name="upload*" propagation="REQUIRED" isolation="READ_COMMITTED" read-only="false" rollback-for="java.lang.Exception"/>
<tx:method name="*" propagation="REQUIRED" read-only="true"/>
</tx:attributes>
</tx:advice>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<aop:config>
<aop:pointcut id="txPointMethod" expression="execution(* cn.com.syis.hisol.hrms.service.*.*Service*.*(..))" />
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointMethod" />
</aop:config>
<!-- ========== RESOURCE DEFINITION ========== -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>
<property name="url" value="jdbc:oracle:thin:@192.168.1.150:1521:ORCL"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configLocation" value="classpath:myBatisConfiguration.xml"></property>
<property name="dataSource" ref="dataSource" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="cn.com.syis.hisol.hrms.dao" />
</bean>
<property name="url" value="jdbc:oracle:thin:@192.168.1.150:1521:ORCL"/>
主要是这个
但是如果程序中使用了不兼容的sql，那没办法简单修改了。你看下你的ip端口是否正确。提示找不到
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>
<property name="url" value="jdbc:oracle:thin:@192.168.1.150:1521:ORCL"/>
这两上地方要改成如下 ：
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/你的数据库" />
同时要引入mysql-connect的jar包
jar包换成mysql-connect的 jdbc改成mysql的地址 name属性也要改， 不过oracle和mysql中有很多关键字不一样，改过来也不一定能用
第一要讲jar包换成mysql的，然后去查找下mysql连接关键字