java list 内存分页_java内存分页 - SunnyWu的个人页面 - OSCHINA - 中文开源技术交流社区...

List bofCytProductArray=getAllOnProdcuct();

List list = new ArrayList();

for(BofCytProduct bofCytProduct:bofCytProductArray){

if(!ProductCodeConstants.JI_JIN.equals(bofCytProduct.getTypeCode())){

list.add(bofCytProduct);

}

}

Collections.sort(list, new CompareProduct());

int count = list.size();

QueryResult queryResult = new QueryResult(count, pager.getPageSize(),

pager.getPageNumber());

// 构造参数

List cytProductList = new ArrayList();

if(list.size()>(queryResult.getIndexNumber()+queryResult.getPageSize())){

cytProductList.addAll(list.subList(queryResult.getIndexNumber(), queryResult.getIndexNumber()+queryResult.getPageSize()));

}else{

cytProductList.addAll(list.subList(queryResult.getIndexNumber(),count));

}

/**

* 根据产品优先级比较，比如1、2，1放在第一位

*

* @author 赵毅(13092551)

*/

private static class CompareProduct implements Comparator, Serializable {

private static final long serialVersionUID = -9212971658450782319L;

@Override

public int compare(BofCytProduct o1, BofCytProduct o2) {

Integer product1 = Integer.parseInt(o1.getProductPriority());

Integer product2 = Integer.parseInt(o2.getProductPriority());

return product1.compareTo(product2);

}

}

如果数据量大，这个方式应该不适合。