<code>

boolean isAlready=false;

Date addStart = LeaveDateStart();

Date addEnd = LeaveDateEnd();

for (CheckEmployeeLeaveLog ent :list

) {

Date lastStart=ent.getLeaveDateStart();

Date lastEnd=ent.getLeaveDateEnd();

if (((lastStart.before(addEnd) ||lastStart.equals(addEnd))

            &&(lastStart.after(addStart)) ||lastStart.equals(addStart))

            ||

((lastEnd.before(addEnd) ||lastStart.equals(addEnd))

                    &&(lastEnd.after(addStart)) ||lastStart.equals(addEnd))) {

    isAlready=true;

break;

}

}

//判断当前时间段是否已经请过假

if(isAlready){

String msg ="该时间段已经请过假";

return error(msg);

}

</code>