java实现分组1

/**
* 内部类，按InstanceContentVO中startDate进行排序
* @author
*
*/
class ContentComparator implements Comparator{

public int compare(Object obj, Object source)  {
try{
InstanceContentVO objContent = (InstanceContentVO)obj;
InstanceContentVO sourceContent = (InstanceContentVO)source;
if(conversionDate (objContent.getStartDate()).before(conversionDate(sourceContent.getStartDate()))){
return 1;

}else if(conversionDate (objContent.getStartDate()).after( conversionDate(sourceContent.getStartDate()) ) ){
return -1;
}else{
return 0;
}
}catch(Exception e){
e.printStackTrace();
return -1;
}
}
}

//计算每组相同天的申报累积时间

public long getGroupHour(  List<InstanceContentVO> contentList )throws ApplicationException{
try{
long groupHour=0;

for (int i=0; i<contentList.size(); i++){
InstanceContentVO vo =contentList.get(i);
groupHour=groupHour+getaRecordHour(vo);
}

return groupHour;
}catch(Exception e){
throw new ApplicationException(e);
}
}