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java List 分頁應(yīng)用（二）

Posted on 2010-01-10 02:22 Gavin.lee 閱讀(615) 評(píng)論(0) 編輯收藏所屬分類: java SE & EE

應(yīng)用類：

package com.Gavin.tools.util;

import java.util.*;

/**

* 為L(zhǎng)ist分頁

* 樣式比較簡(jiǎn)單，適合WAP使用，直接輸出頁碼到頁面

public class PagerUtil {

private int pageSize = 10;// 每頁大小

private int nextPage;// 下一頁

private int prePage;// 前一頁

private int pageCount;// 總頁數(shù)

private int currentPage;// 當(dāng)前頁

private int listSize = 0;// 記錄總數(shù)

private ArrayList alist = new ArrayList();

private String url;

/**

* 初始化記錄列表

* @param it Iterator

* @return ArrayList

public ArrayList getAlist(Iterator it) {

ArrayList al = new ArrayList();

while (it.hasNext()) {

al.add(it.next());

}

return al;

}

/**

* 構(gòu)造方法

* @param list Collection

public PagerUtil(Collection list) {

alist = this.getAlist(list.iterator());

listSize = alist.size();

nextPage = 1;

prePage = 0;

pageCount = listSize / pageSize + 1;

currentPage = 1;

}

/**

* 構(gòu)造方法

* @param list Collection

* @param pageSize int

public PagerUtil(Collection list, int pageSize) {

alist = (ArrayList) list;

this.pageSize = pageSize;

listSize = alist.size();

nextPage = 1;

prePage = 0;

pageCount = listSize / pageSize;

if (listSize % pageSize > 0) {

pageCount = pageCount + 1;

}

currentPage = 1;

}

public PagerUtil(Vector v, int pageSize) {

for (int i = 0; i < v.size(); i++) {

alist.add(v.get(i));

}

this.pageSize = pageSize;

listSize = alist.size();

nextPage = 1;

prePage = 0;

pageCount = listSize / pageSize;

if (listSize % pageSize > 0) {

pageCount = pageCount + 1;

}

currentPage = 1;

}

/**

* 下一頁

* @return ArrayList

public int nextPage() {

int tempInt = 1;

if (currentPage < this.getPageCount() && currentPage >= 1) {

tempInt = currentPage + 1;

} else

tempInt = 1;

return tempInt;

}

/**

* 前一頁

* @return ArrayList

public int prePage() {

int tempInt = 1;

if (currentPage > 1) {

tempInt = currentPage - 1;

} else

tempInt = this.getPageCount();

return tempInt;

}

/**

* 第一頁

* @return ArrayList

public int firstPage() {

nextPage = 1;

prePage = this.getPageCount();

currentPage = nextPage;

return currentPage;

}

/**

* 最后一頁

* @return ArrayList

public int endPage() {

nextPage = this.getPageCount();

prePage = nextPage - 1;

currentPage = nextPage;

return currentPage;

}

/**

* 根據(jù)當(dāng)前頁得到記錄列表

* @param currentPage int

* @return ArrayList

public ArrayList getPageList() {

ArrayList tempList = new ArrayList();

for (int i = (currentPage - 1) * pageSize; i < (currentPage - 1)

* pageSize + pageSize; i++) {

if (i >= 0 && i < this.alist.size()) {

tempList.add(alist.get(i));

} else

break;

}

return tempList;

}

public String getPageCtrlString() {

String strCtrl = "";

if (this.currentPage == 1) {

//strCtrl = "首頁 ";

} else {

strCtrl = "<a href='" + url + "?page=1'>首頁</a> ";

}

if (this.currentPage == 1) {

//strCtrl = strCtrl + "上一頁 ";

} else {

strCtrl = strCtrl + "<a href='" + url + "?page=" + this.prePage() + "'>上頁</a> ";

}

if (this.currentPage == this.pageCount) {

//strCtrl = strCtrl + "下一頁 ";

} else {

strCtrl = strCtrl + "<a href='" + url + "?page=" + this.nextPage() + "'>下頁</a> ";

}

if (this.currentPage == this.pageCount) {

//strCtrl = strCtrl + "末頁 ";

} else {

strCtrl = strCtrl + "<a href='" + url + "?page=" + this.getPageCount() + "'>末頁</a> ";

}

strCtrl = strCtrl + "\n\r"; //換行

// strCtrl = strCtrl

// + "跳到 <select name='toPage' onChange=\"window.location='" + url

// + "?page='+this.options[this.selectedIndex].value;\">";

if(this.getPageCount() <= 1) {

} else if(this.getPageCount() <= 7) {

for (int i = 1; i <= this.getCurrentPage(); i++) {

if (i == this.getCurrentPage()) {

strCtrl = strCtrl + "" + i + " ";

} else {

strCtrl = strCtrl + "<a href='" + url + "?page=" + i + "'>" + i + "</a> ";

}

} else if(4 < this.getCurrentPage() && this.getCurrentPage() < (this.getPageCount() - 3)) {

for (int i = this.getCurrentPage() - 3; i <= this.getCurrentPage() + 3; i++) {

if (i == this.getCurrentPage()) {

strCtrl = strCtrl + "" + i + " ";

} else {

strCtrl = strCtrl + "<a href='" + url + "?page=" + i + "'>" + i + "</a> ";

}

} else if(this.getCurrentPage() <= 4) {

for (int i = 1; i <= 7; i++) {

if (i == this.getCurrentPage()) {

strCtrl = strCtrl + "" + i + " ";

} else {

strCtrl = strCtrl + "<a href='" + url + "?page=" + i + "'>" + i + "</a> ";

}

} else if((this.getPageCount() - 6) <= this.getCurrentPage()) {

for (int i = this.getPageCount() - 6; i <= this.getPageCount(); i++) {

if (i == this.getCurrentPage()) {

strCtrl = strCtrl + "" + i + " ";

} else {

strCtrl = strCtrl + "<a href='" + url + "?page=" + i + "'>" + i + "</a> ";

}

} else {

for (int i = this.getCurrentPage() - 3; i <= this.getCurrentPage() + 3; i++) {

if (i == this.getCurrentPage()) {

strCtrl = strCtrl + "" + i + " ";

} else {

strCtrl = strCtrl + "<a href='" + url + "?page=" + i + "'>" + i + "</a> ";

}

strCtrl = strCtrl + "\n\r"; //換行

strCtrl = strCtrl + "當(dāng)前" + this.getCurrentPage() + "/" + this.getPageCount() + "頁每頁"

+ this.getPageSize() + "條共" + this.listSize + "條";

return strCtrl;

}

public int getCurrentPage() {

return currentPage;

}

public int getNextPage() {

return nextPage;

}

public int getPageCount() {

return pageCount;

}

public int getPageSize() {

return pageSize;

}

public int getPrePage() {

return prePage;

}

public String getUrl() {

return url;

}

public void setPrePage(int prePage) {

this.prePage = prePage;

}

public void setPageSize(int pageSize) {

this.pageSize = pageSize;

}

public void setPageCount(int pageCount) {

this.pageCount = pageCount;

}

public void setNextPage(int nextPage) {

this.nextPage = nextPage;

}

public void setCurrentPage(int currentPage) {

if (currentPage > this.getPageCount()) {

this.currentPage = this.getPageCount();

} else if (currentPage < 0) {

this.currentPage = 1;

} else {

this.currentPage = currentPage;

}

public void setUrl(String url) {

this.url = url;

}

測(cè)試類：

package com.Gavin.tools.util;

import java.util.ArrayList;

public class TestPagrUtil {

public static void main(String args[]) {

ArrayList al = new ArrayList();

al.add("a");

al.add("b");

al.add("c");

al.add("d");

al.add("e");

al.add("f");

al.add("g");

al.add("h");

al.add("i");

al.add("j");

al.add("k");

al.add("l");

al.add("m");

al.add("n");

PagerUtil autopage = new PagerUtil(al,1);

autopage.setCurrentPage(5);

autopage.setUrl("/page/user/account/isprize.jsp");

ArrayList currentPageList = autopage.getPageList();

String ctrlStr = autopage.getPageCtrlString();

for(Object o: currentPageList) {

System.out.println(o.toString());

}

System.out.println(ctrlStr);

}

//e

//<a href='/page/user/account/isprize.jsp?page=1'>首頁</a> <a href='/page/user/account/isprize.jsp?page=4'>上頁</a> <a href='/page/user/account/isprize.jsp?page=6'>下頁</a> <a href='/page/user/account/isprize.jsp?page=14'>末頁</a>

//<a href='/page/user/account/isprize.jsp?page=2'>2</a> <a href='/page/user/account/isprize.jsp?page=3'>3</a> <a href='/page/user/account/isprize.jsp?page=4'>4</a> 5 <a href='/page/user/account/isprize.jsp?page=6'>6</a> <a href='/page/user/account/isprize.jsp?page=7'>7</a> <a href='/page/user/account/isprize.jsp?page=8'>8</a>

//當(dāng)前5/14頁每頁1條共14條

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