我用的是Spring+Mybatis，配置文件写的没问题，昨天也连上了，今天就一直报错严重:Servlet.service()forservlet[springmvc]incontextwithpath[/help]threwexception[Requestprocessin...

我用的是Spring+Mybatis，配置文件写的没问题，昨天也连上了，今天就一直报错

严重: Servlet.service() for servlet [springmvc] in context with path [/help] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:

### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Io 异常: The Network Adapter could not establish the connection)

### The error may exist in file [E:\tomcat\apache-tomcat-7.0.47\apache-tomcat-7.0.47\webapps\help\WEB-INF\classes\org\xxxx\entity\Personl.xml]

### The error may involve org.xxxx.dao.PersonDao.findAll

### The error occurred while executing a query

### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Io 异常: The Network Adapter could not establish the connection)] with root cause

java.sql.SQLException: Io 异常: The Network Adapter could not establish the connection

at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:74)

at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:110)

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:171)

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:227)

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:494)

at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:411)

at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:490)

at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:202)

at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:33)

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