程序无法与数据库建立连接，请大神帮忙看看吧

这是程序报错：
WrapperSimpleApp: Encountered an error running main: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Error preloading the connection pool
INFO   | jvm 1    | 2011/12/19 17:48:52 | org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Error preloading the connection pool
INFO   | jvm 1    | 2011/12/19 17:48:52 | org.apache.commons.dbcp.SQLNestedException: Error preloading the connection pool
INFO   | jvm 1    | 2011/12/19 17:48:52 |  at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1238)
INFO   | jvm 1    | 2011/12/19 17:48:52 |  at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
INFO   | jvm 1    | 2011/12/19 17:48:52 |  at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:112)
INFO   | jvm 1    | 2011/12/19 17:48:52 |  at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
INFO   | jvm 1    | 2011/12/19 17:48:52 |  at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:462)
INFO   | jvm 1    | 2011/12/19 17:48:52 |  at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:528)
INFO   | jvm 1    | 2011/12/19 17:48:52 |  at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:561)
INFO   | jvm 1    | 2011/12/19 17:48:52 |  at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:579)
INFO   | jvm 1    | 2011/12/19 17:48:52 |  at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:589)