在工作中需要一個翻頁效果，所以寫下了如下方法。實現了常用的翻頁效果，但代碼還沒有進行優化（缺點：不適合數據量大的情況，因為所有的記錄存在一個Vector變量中）貼出來供需要著參考一下！
import java.util.*;
public class Pages {
int allRows;//所有的行數
int currRow;//當前是第幾行
int onePageRows;//一頁顯示多少行
int allPages;//所有的頁數
int currPage= 1;
boolean firstPage= false;
boolean lastPage= false;
public Pages(int onePageRows) {
this.onePageRows= onePageRows;
}
/*
vector1 為所有的記錄
*/
public Vector downPage(Vector vector1, int currPage) {
Vector vector= new Vector();
this.currPage= currPage;
this.allRows= vector1.size();
this.currRow= currPage * (this.onePageRows);
int j= this.allRows % this.onePageRows;
this.allPages= (this.allRows / this.onePageRows) + (j == 0 ? 0 : 1);
this.currPage++;
if (this.currPage < this.allPages) {
this.lastPage= true;
} else {
this.lastPage= false;
}
this.firstPage= true;
int i= 0;
for (i= 0; i < this.onePageRows && currPage * this.onePageRows + i < this.allRows; i++) {
vector.add(i, vector1.get(currRow + i));
}
this.currRow= this.currRow + i;
return vector;
}
public Vector upPage(Vector vector1, int currPage) {
Vector vector= new Vector();
this.currPage= currPage;
this.allRows= vector1.size();
this.currRow= (currPage - 2) * (this.onePageRows);
int j= this.allRows % this.onePageRows;
this.allPages= (this.allRows / this.onePageRows) + (j == 0 ? 0 : 1);
this.currPage--;
if (this.currPage > 1) {
this.firstPage= true;
} else {
this.firstPage= false;
}
this.lastPage= true;
for (int i= 0; i < this.onePageRows; i++) {
vector.add(i, vector1.get(this.currRow + i));
}
return vector;
}
public Vector firstPage(Vector vector1) {
Vector vector= new Vector();
this.allRows= vector1.size();
this.currRow= this.onePageRows;
int j= this.allRows % this.onePageRows;
this.allPages= (this.allRows / this.onePageRows) + (j == 0 ? 0 : 1);
this.firstPage= false;
if (allPages > 1)
this.lastPage= true;
for (int i= 0; i < this.onePageRows && i < vector1.size(); i++) {
vector.add(i, vector1.get(i));
}
return vector;
}
public Vector lastPage(Vector vector1) {
Vector vector= new Vector();
this.allRows= vector1.size();
int j= this.allRows % this.onePageRows;
this.allPages= (this.allRows / this.onePageRows) + (j == 0 ? 0 : 1);
this.currPage= this.allPages;
this.lastPage= false;
if (allPages > 1)
this.firstPage= true;
int m= j == 0 ? this.onePageRows : this.allRows - (this.allPages - 1) * this.onePageRows;
int n= m;
for (int i= 0; i < m; i++) {
vector.add(i, vector1.get(this.allRows - n));
n--;
}
return vector;
}
public String getToolBar() {
String form= "<form id=\"form\" method=\"post\">";
String table1= "<table align=\"center\" width=\"70%\"><tr><td>";
String button1= "<input type=\"button\" value=\"首頁\" onClick=\"dealPage();\" id=\"firstPage\" /> ";
String disabled= "disabled=";
if (!this.firstPage)
disabled= disabled + "disabled";
else
disabled= "";
String button2= "<input type=\"button\" value=\"上頁\" id=\"upPage\" onClick=\"dealPage();\" " + disabled + " /> ";
if (!this.lastPage)
disabled= disabled + "disabled";
else
disabled= "";
String button3= "<input type=\"button\" value=\"下頁\" id=\"downPage\" onClick=\"dealPage();\" " + disabled + " /> ";
String button4= "<input type=\"button\" value=\"尾頁\" id=\"lastPage\" onClick=\"dealPage();\"/>";
String table2= "</td></tr><tr><td align=\"center\">";
String table3= "共" + this.allRows + "行/第" + this.currPage + "頁/共" + this.allPages + "頁</td></tr></table></form>";
String result= form + table1 + button1 + button2 + button3 + button4 + table2 + table3;
return result;
}
public String getJavaScript() {
StringBuffer result= new StringBuffer();
if (this.getAllRows() > this.getOnePageRows()) {
result.append("<SCRIPT language=JavaScript>");
result.append("function dealPage(){");
result.append("document.all.form.action=\"/mydomain/javaoa/selectqh.do?method=\"+event.srcElement.id+\"&currPage=");
result.append(this.getCurrPage() + "&onePageRows=" + this.getOnePageRows() + "\";");
result.append("document.all.form.submit();");
result.append("}");
result.append("</SCRIPT>");
}
return result.toString();
}
// public static void main(String[] args) {
// Pages page= new Pages(5);
// Vector vector= new Vector();
// Vector vector1= new Vector();
// for (int i= 0; i < 7; i++) {
// vector.add(i, new String(new Integer(i).toString()));
// }
// vector1= page.upPage(vector, 2);
// String s= page.getJavaScript();
// System.out.println("==" + s);
// for (int i= 0; i < vector1.size(); i++) {
// System.out.println(i + "=" + vector1.get(i));
// }
// System.out.println("allRows=" + page.allRows);
// System.out.println("currRow=" + page.currRow);
// System.out.println("onePageRows=" + page.onePageRows);
// System.out.println("allPages=" + page.allPages);
// System.out.println("currPage=" + page.currPage);
// System.out.println("firstPage=" + page.firstPage);
// System.out.println("lastPage=" + page.lastPage);
// }
/**
* @return
*/
public int getAllPages() {
return allPages;
}
/**
* @return
*/
public int getAllRows() {
return allRows;
}
/**
* @return
*/
public int getCurrPage() {
return currPage;
}
/**
* @return
*/
public int getCurrRow() {
return currRow;
}
/**
* @return
*/
public boolean isFirstPage() {
return firstPage;
}
/**
* @return
*/
public boolean isLastPage() {
return lastPage;
}
/**
* @return
*/
public int getOnePageRows() {
return onePageRows;
}
}