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PreparedStatement是用来执行SQL查询语句的API之一，Java提供了 Statement、PreparedStatement 和 CallableStatement三种方式来执行查询语句，其中 Statement 用于通用查询， PreparedStatement 用于执行参数化查询，而 CallableStatement则是用于存储过程。同时PreparedStatement还...

出错代码如下 public int SaveNewEquipment(Equipment equipment) throws SQLException { QueryRunner qr = new QueryRunner(DataSourceUtils.getDataSource()); String sql = "insert into equipment values(?,...