select * from user where username = #{username} and password = #{password} insert into user value (#{username},#{password}) update user set password = #{password} where username=#{username} select * from goods and type=#{type} and gid =#{gid} and username=#{username} order by gid desc update goods type=#{type}, img=#{img}, price=#{price}, commit =#{commit}, phone =#{phone} where gid=#{gid} delete from goods where gid=#{gid} insert into goods values (#{username},#{price},#{type},#{commit},#{img},#{gid},#{phone})