一个实用的JSP分页代码

有热心网友回复：
str += " 转到<select onChange=\"window.location.href='" + fileName + temp + "cur_page='+this.options[this.selectedIndex].value\">";
已经试过了，没问题

1.以下是实现分页的类PageResultSet

复制代码 代码如下:

package page.bean;
import java.util.*;
public class PageResultSet {
/**
* 分页数据
*/
private Collection data = null;
/**
* 当前页
*/
private int curPage;
/**
* 每页显示的记录数
*/
private int pageSize;
/**
* 记录行数
*/
private int rowsCount;
/**
* 页数
*/
private int pageCount;
public PageResultSet(Collection data) {
this.data = data;
this.curPage = 1;
this.pageSize = 10;
this.rowsCount = data.size();
this.pageCount = (int) Math.ceil((double) rowsCount / pageSize);
}
public PageResultSet(Collection data, int curPage) {
this.data = data;
this.curPage = curPage;
this.pageSize = 10;
this.rowsCount = data.size();
this.pageCount = (int) Math.ceil((double) rowsCount / pageSize);
}
public PageResultSet(Collection data, int curPage, int pageSize) {
this.data = data;
this.curPage = curPage;
this.pageSize = pageSize;
this.rowsCount = data.size();
this.pageCount = (int) Math.ceil((double) rowsCount / pageSize);
}
/**
* getCurPage:返回当前的页数
*
* @return int
*/
public int getCurPage() {
return curPage;
}
/**
* getPageSize：返回分页大小
*
* @return int
*/
public int getPageSize() {
return pageSize;
}
/**
* getRowsCount：返回总记录行数
*
* @return int
*/
public int getRowsCount() {
return rowsCount;
}
/**
* getPageCount：返回总页数
*
* @return int
*/
public int getPageCount() {
return pageCount;
}
/**
* 第一页
*
* @return int
*/
public int first() {
return 1;
}
/**
* 最后一页
*
* @return int
*/
public int last() {
return pageCount;
}
/**
* 上一页
*
* @return int
*/
public int previous() {
return (curPage - 1 < 1) ? 1 : curPage - 1;
}
/**
* 下一页
*
* @return int
*/
public int next() {
return (curPage + 1 > pageCount) ? pageCount : curPage + 1;
}
/**
* 第一页
*
* @return boolean
*/
public boolean isFirst() {
return (curPage == 1) ? true : false;
}
/**
* 最后一页
*
* @return boolean
*/
public boolean isLast() {
return (curPage == pageCount) ? true : false;
}
/** * 获取当前页数据
*
* @return Collection
*/
public Collection getData() {
Collection curData = null;
if (data != null) {
int start = (curPage - 1) * pageSize;
int end = 0;
if (start + pageSize > rowsCount)
end = rowsCount;
else
end = start + pageSize;
ArrayList arrayCurData = new ArrayList();
ArrayList arrayData = null;
Vector vectorCurData = new Vector();
Vector vectorData = null;
boolean isArray = true;
if (data instanceof ArrayList) {
arrayData = (ArrayList) data;
isArray = true;
} else if (data instanceof Vector) {
vectorData = (Vector) data;
isArray = false;
}
for (int i = start; i < end; i++) {
if (isArray) {
arrayCurData.add(arrayData.get(i));
} else {
vectorData.add(vectorData.elementAt(i));
}
}
if (isArray) {
curData = (Collection) arrayCurData;
} else {
curData = (Collection) vectorCurData;
}
}
return curData;
}
/**
* 获取工具条
*
* @return String
*/
public String getToolBar(String fileName) {
String temp = "";
if (fileName.indexOf("?") == -1) {
temp = "?";
} else {
temp = "&";
}
String str = "<form method='post' action='" + fileName + "'>";
str += "<p>";
if (isFirst())
str += "首页 上一页&nbsp;";
else {
str += "<a href='" + fileName + temp + "cur_page=1'>首页</a>&nbsp;";
str += "<a href='" + fileName + temp + "cur_page=" + (curPage - 1) + "'>上一页</a>&nbsp;";
}
if (isLast())
str += "下一页 尾页&nbsp;";
else {
str += "<a href='" + fileName + temp + "cur_page=" + (curPage + 1) + "'>下一页</a>&nbsp;";
str += "<a href='" + fileName + temp + "cur_page=" + pageCount + "'>尾页</a>&nbsp;";
}
str += "&nbsp;共<b>" + rowsCount + "</b>条记录&nbsp;";
str += "&nbsp;转到<select onChange="location='" + fileName
+ temp + "cur_page='+this.options[this.selectedIndex].value">";
for (int i = 1; i <= pageCount; i++) {
if (i == curPage)
str += "<option value='" + i + "' selected>第" + i + "页</option>";
else
str += "<option value='" + i + "'>第" + i + "页</option>";
}
str += "</select></p></form>";
return str;
}
}

2.一下是Action

复制代码 代码如下: