第一种方案 DAO层的函数方法 Public User selectUser(String name,String area); 对应的Mapper.xml <select id="selectUser" resultMap="BaseResultMap"> select * from user_user_t where user_name = #{0} and user_area=#{1} </select> 其中,#{0}代表接收的是da…
第一种 Public User selectUser(String name,String area); 对应的Mapper.xml <select id="selectUser" resultMap="BaseResultMap"> select * from user_user_t where user_name = #{0} and user_area=#{1} </select> 其中,#{0}代表接收的是dao层中的第一个参数,#{…
想必各位在开发过程中一定使用过:统计的功能,用到了很多SQL的函数,于是就直接写在Mapper文件中了: 比如: member_num,MAX(ID) AS newestLoanID,MIN (ID) AS earlyLoanID,SUM(applied_amount) AS sumLoansAmount,status select member_num,MAX(ID) AS newestLoanID,MIN (ID) AS earlyLoanID,SUM(applied_amount) AS…
问题 在Ubuntu中,有时候运用sudo apt-get install 安装软件时,会出现如下的情况: E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it? 三种解决方案 这是由于apt…