这种怎实现啊这里得加' ',但是加了又不行。
${if(len(colname)=0,"1=1","colname='"+colname+"'")}
where 1=1
${if(len(航班日期) = 0,"","and field0008 = '"+航班日期+"'")}
这么写
${if(len(colname)=0," 1=1"," "+colname+"='"+col+"'")}