Too many parameters: expected 1, was given 2 Query: SELECT count(id) FROM `user` WHERE username = ?; Parameters: [org.apache.commons.dbutils.handlers.ScalarHandler@453da22c, [李明]]

 

public Object getValue(String sql,Object... args) { Connection conn = null; Object obj= null; try { //拿conn conn = JdbcUtils.getConnection(); obj = queryRunner.query(conn, sql, new ScalarHandler(),args); } catch (Exception e) { e.printStackTrace(); System.out.println("BaseDao.getValue报的错"); }finally { JdbcUtils.closeConn(conn); } return obj; }

 

 

代码中的query的错误（update复制后忘为query）