java工具类——实现分页功能_java 分页工具类

import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class PageUtil {

@Value("#{manyProperties.pageSize}")
private int pageSize;

@Value("#{manyProperties.showNum_a}")
private int showNum_a;

public int getPageSize() {
	return pageSize;
}

public int getShowNum_a() {
	return showNum_a;
}

/**
 * 此方法是计算页面分页条中有多少个超链接
 * @param currentPage
 * @param pageSize
 * @param totalCount
 * @param totalPage
 * @return
 */
public List<Integer> getFenYe_a_Num(
		int currentPage,
		int totalCount,
		int totalPage){
	List<Integer> aNum=new ArrayList<Integer>();
	//int showNum_a=CommonValue.showNum_a;
	if(totalCount/pageSize>=showNum_a){
		//总页数大于等于showNum_a   5
		if(currentPage<showNum_a/2+1){
			//当前页在showNum_a的中间左边
			for(int i=1;i<=showNum_a;i++){
				aNum.add(new Integer(i));
			}
		}else if((totalPage-currentPage)<(showNum_a/2+1)){
			//判断如果是到最后,最后的那几个数字不能移动的
			for(int i=1;i<=showNum_a;i++){
				aNum.add(new Integer(totalPage-showNum_a+i));
			}
		}else{
			//不是头,也不是尾,是中间部分
			for(int i=(currentPage-(showNum_a-(showNum_a/2+1)));i<=(currentPage+(showNum_a-(showNum_a/2+1)));i++){
				aNum.add(new Integer(i));
			}
		}
	}else{
		//总页数不够showNum_a  5
		for(int i=1;i<=totalPage;i++){
			aNum.add(new Integer(i));
		}
	}
	
	return aNum;
	
}
	
}
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