不注意的小错误(java.lang.String.positive() is applicable)
标签:sql 语句拼接报错: No signature of method: java.lang.String.positive() is applicable for argument types: () values: []原因:字符串相加时,加号前后有空格例如(这样是不行的):sql =+ "and c.efficientStatus = "+courseStatus //错误...