一段分页代码PaginationSupport.java
2013年11月01日
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package com.javaeye.common.hibernate;
import java.util.LinkedList;
import java.util.List;
public class PaginationSupport ...{
// ---------------------------------------------------------
// static variables
// ---------------------------------------------------------
// 默认每页显示条数
public static final int DEFAULT_MAX_PAGE_ITEMS = 10;
// 默认开始记录条数
public static final int DEFAULT_OFFSET = 0;
// 默认显示页码最大数
public static final int DEFAULT_MAX_INDEX_PAGES = 10;
// index 为索引页位置, 可以选择 "center", "forward", "half-full"
public static final String DEFALUT_INDEX = "center";
// ---------------------------------------------------------
// memeber variables
// ---------------------------------------------------------
// 开始记录条数
private int offset = 0;
// 每页显示条数
private int maxPageItems = DEFAULT_MAX_PAGE_ITEMS;
// 显示页码最大数
private int maxIndexPages = DEFAULT_MAX_INDEX_PAGES;
// 总记录数
private int totalCount;
// 返回结果集
private List items = new LinkedList();
// index 为索引页位置, 可以选择 "center", "forward", "half-full"
private String index = DEFALUT_INDEX;
private int[] indexes = new int[0];
public PaginationSupport() ...{
setMaxIndexPages(DEFAULT_MAX_INDEX_PAGES);
setTotalCount(0);
setOffset(0);
setItems(new LinkedList());
}
public PaginationSupport(List items, int totalCount) ...{
setMaxPageItems(DEFAULT_MAX_PAGE_ITEMS);
setTotalCount(totalCount);
setItems(items);
setOffset(0);
}
public PaginationSupport(List items, int totalCount, int offset) ...{
setMaxPageItems(DEFAULT_MAX_PAGE_ITEMS);
setTotalCount(totalCount);
setItems(items);
setOffset(offset);
}
public PaginationSupport(List items, int totalCount, int offset,
int maxPageItems) ...{
setMaxPageItems(maxPageItems);
setTotalCount(totalCount);
setItems(items);
setOffset(offset);
}
public PaginationSupport(List items, int totalCount, int offset,
int maxPageItems, int maxIndexPages, String index) ...{
setMaxPageItems(maxPageItems);
setTotalCount(totalCount);
setItems(items);
setOffset(offset);
setMaxIndexPages(maxIndexPages);
setIndex(index);
}
public List getItems() ...{
return items;
}
public void setItems(List items) ...{
if (items == null) ...{
this.items = new LinkedList();
} else ...{
this.items = items;
}
}
public int getMaxPageItems() ...{
return maxPageItems;
}
public void setMaxPageItems(int maxPageItems) ...{
this.maxPageItems = maxPageItems;
}
public int getTotalCount() ...{
return totalCount;
}
public void setTotalCount(int totalCount) ...{
if (totalCount > 0) ...{
this.totalCount = totalCount;
int count = totalCount / maxPageItems;
if (totalCount % maxPageItems > 0) ...{
count++;
}
indexes = new int[count];
for (int i = 0; i < count; i++) ...{
indexes[i] = maxPageItems * i;
}
} else ...{
this.totalCount = 0;
}
}
public int[] getIndexes() ...{
return indexes;
}
public void setIndexes(int[] indexes) ...{
this.indexes = indexes;
}
public int getOffset() ...{
return offset;
}
public void setOffset(int startIndex) ...{
if (totalCount <= 0)
this.offset = 0;
else if (startIndex >= totalCount)
this.offset = indexes[indexes.length - 1];
else if (startIndex < 0)
this.offset = 0;
else ...{
this.offset = indexes[startIndex / maxPageItems];
}
}
public int getNextIndex() ...{
int nextIndex = getOffset() + maxPageItems;
return nextIndex >= totalCount ? getOffset() : nextIndex;
}
public int getPreviousIndex() ...{
int previousIndex = getOffset() - maxPageItems;
return previousIndex < 0 ? DEFAULT_OFFSET : previousIndex;
}
/** *//**
