异常信息为：
org.springframework.jdbc.UncategorizedSQLException: PreparedStatementCallback; uncategorized SQLException for SQL []; SQL state [null]; error code [0]; [http-nio-31103-exec-3] Timeout: Pool empty. Unable to fetch a connection in 1 seconds, none available[size:30; busy:30; idle:0; lastwait:1000].; nested exception is org.apache.tomcat.jdbc.pool.PoolExhaustedException: [http-nio-31103-exec-3] Timeout: Pool empty. Unable to fetch a connection in 1 seconds, none available[size:30; busy:30; idle:0; lastwait:1000].
楼主你好，请问你用的是什么数据库？什么数据库框架呢？hibernate、mybaties？？？你最好看一下自己数据库表字段是否和Java实体类映射的上