而且报错
beforeFirst at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:114) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:156) at oracle.jdbc.driver.BaseResultSet.beforeFirst(BaseResultSet.java:56) at DBTest.main(DBTest.java, Compiled Code)
beforeFirst at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:114) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:156) at oracle.jdbc.driver.BaseResultSet.beforeFirst(BaseResultSet.java:56) at DBTest.main(DBTest.java, Compiled Code)
此外,你刚得到ResultSet时,指针就是指向第一条记录之前的,不用再调用beforeFirst()了。