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StringPagination类代码为:

package example;
public class StringPagination {
      
/** 当前页码数 */  
      
private int currentPage = 1;  

      
/** 需要分页的长字符串 */  
      
private String text;  

      
/** 每页显示字符数, 默认为 200 */  
      
private int sizePerPage = Constants.TEXT_PAGE_SIZE_DEFALUT;  

      
/** 总页数 */  
      
private int totalPage; 

      
public StringPagination() {}  
      
      
/**  
      * 返回当前页的字符串.  
      * 
@return  
      
*/
  
      
public String getCurrentPagedText() {  
        
try {  
              
if(getCurrentPage() < getTotalPage()) {  
                
return getText().substring((getCurrentPage() - 1* getSizePerPage(),  
                getCurrentPage() 
* getSizePerPage());  
              }
 else if(getTotalPage() > 0{  
                 
return getText().substring((getCurrentPage() - 1* getSizePerPage());  
              }
  
        }
 catch (Exception e) {  
                 e.printStackTrace();  
        }
  
          
return null;  
        }
  

       
/**  
       * 
@return Returns the 当前页码数.  
       
*/
  
       
public int getCurrentPage() {  
          
if(currentPage <= 0) currentPage = 1;  

         
return currentPage;  
       }
  

       
/**  
        * 设置当前页码, 从 1 开始.  
        *  
        * 
@param currentPage  
        * The 当前页码数 to set.  
       
*/
  
        
public void setCurrentPage(int currentPage) {  
           
if (currentPage <= 0{  
                    currentPage 
= 1;  
           }
  
            
this.currentPage = currentPage;  
         }
  

       
/**  
        * 
@return Returns the 总页码数, 如果没有数据, 就返回 1.  
       
*/
  
         
public int getTotalPage() {  
            
if(getText() == null) totalPage = 0;  
              totalPage 
= (int) Math.ceil(1.0 * getText().length() / getSizePerPage()); // 总页面数  

            
if (totalPage == 0)  
                     totalPage 
= 1;  
            
return totalPage;  
          }
  

        
/**  
         * 
@param totalPage  
         * The totalPage to set.  
        
*/
  
          
public void setTotalPage(int totalPage) {  
             
this.totalPage = totalPage;  
          }
  

        
/**  
         * 
@return Returns the 每页显示字符数.  
        
*/
  
          
public int getSizePerPage() {  
               
return sizePerPage;  
           }
  

        
/**  
         * 
@param sizePerPage  
         * The 每页显示字符数 to set.  
        
*/
  
          
public void setSizePerPage(int sizePerPage) {  
                   
this.sizePerPage = sizePerPage;  
          }
  

        
/**  
         * 
@return Returns the 需要分页的长字符串.  
        
*/
  
          
public String getText() {  
              
return text;  
           }
  

        
/**  
          * 
@param text  
          * The 需要分页的长字符串 to set.  
        
*/
  
         
public void setText(String text) {  
               
this.text = text;  
         }
  
         

           
public static void main(String[] args) {  
               StringPagination pager 
= new StringPagination();  
                 pager.setSizePerPage(
5);  
                 pager.setText(
"12345678901");  
                 pager.setCurrentPage(
2);  

                 System.out.println(pager.getTotalPage());  
                 System.out.println(pager.getCurrentPagedText());  
           }
  



}

Action代码为:

public ActionForward execute(
        ActionMapping mapping,
        ActionForm form,
        HttpServletRequest request,
        HttpServletResponse response) 
{

        
// TODO Auto-generated method stub
        StringPagination stringPagination = new StringPagination();
        WapResource wapResource 
= new WapResource();
        
        
int curPage;                //当前页          
        int maxPage;                // 总页数 
        String strResPic = "";
        String content 
= "";
        String resName 
= "";
        String outputContent 
= "";
        
        String strResId 
= request.getParameter("resId");
        String strPageNo 
= request.getParameter("curPage");
         
        
try {
            content 
= new String(request.getParameter("content").getBytes("ISO-8859-1"),"UTF-8");
                        
        }
 catch (UnsupportedEncodingException e) {
            
// TODO Auto-generated catch block
            e.printStackTrace();
        }

        
        
if(strPageNo != null){
            
if(!"1".equals(strPageNo)){
                stringPagination.setCurrentPage(Integer.parseInt(strPageNo));
            }

        }

        
        List wapResourceList 
= this.getWapResourceDao().getWapResourceByResID(Long.valueOf(strResId));
        
        
        
if(wapResourceList != null){
//            String pagination process
            wapResource = (WapResource)wapResourceList.get(0);
            curPage 
= stringPagination.getCurrentPage();            
            strResPic 
= wapResource.getResPic();
            resName 
= wapResource.getResName();            
            stringPagination.setText(wapResource.getResContent());       
            maxPage 
= stringPagination.getTotalPage();
            outputContent 
= stringPagination.getCurrentPagedText();
            
            request.setAttribute(
"wapResourceList", wapResourceList);
            request.setAttribute(
"content", content);
            
            request.setAttribute(
"curPage", String.valueOf(curPage));
            request.setAttribute(
"forward", String.valueOf(stringPagination.getCurrentPage() - 1));
            request.setAttribute(
"back", String.valueOf(stringPagination.getCurrentPage() + 1));
            request.setAttribute(
"maxPage", String.valueOf(maxPage));
            request.setAttribute(
"strResPic", strResPic);
            request.setAttribute(
"resName", resName);
            request.setAttribute(
"strResId", strResId);
            request.setAttribute(
"outputContent", outputContent);
            
            
        }

        
return mapping.findForward("searchContent");
    
    }

JSP 页面:
<%@ page contentType="text/vnd.wap.wml; charset=UTF-8"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic"%>

<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<head>
    
<meta http-equiv="Cache-Control" content="no-cache" />
    
<meta http-equiv="Cache-Control" content="max-age=0" />
</head>

<card title='<bean:message key="prompt.index.title"/>'>

<p align='left'>
    
<%
       
int curPage,forward, back;                //当前页          
       int maxPage;                // 总页数 
       String content = (String)request.getAttribute("content");
       String strResPic 
= (String)request.getAttribute("strResPic");
       String outputContent 
= (String)request.getAttribute("outputContent");
       String resName 
= (String)request.getAttribute("resName");
       String resId 
= (String)request.getAttribute("strResId");
       curPage 
= Integer.parseInt(request.getAttribute("curPage").toString());
       maxPage 
= Integer.parseInt(request.getAttribute("maxPage").toString());
       forward 
= Integer.parseInt(request.getAttribute("forward").toString());
       back 
= Integer.parseInt(request.getAttribute("back").toString());
           
if(null != strResPic){
    
%>
               
<img src='<%=strResPic%>' alt='img' />
               
<br/>
    
<%
             }

             out.print(resName);
             out.print(
"<br/><br/>");             
             out.print(outputContent);
             
    
%>
    
<br/>
    
    
<%             
               
if (curPage != 1  &&  maxPage > 0 ) {
     
%>     
       
<anchor>上一页
          
<go href="/cars/searchContent.do" method="post" accept-charset="UTF-8"> 
             
<postfield name="curPage" value="<%=forward%>"/>
             
<postfield name="resId" value="<%=resId%>"/> 
             
<postfield name="content" value="<%=content%>"/>              
          
</go> 
       
</anchor>
       
<br/>
              
<%
               }
if (curPage != maxPage  &&  maxPage > 0 ) {
             
%>
               
        
<anchor>下一页
          
<go href="/cars/searchContent.do" method="post" accept-charset="UTF-8"> 
             
<postfield name="curPage" value="<%=back%>"/> 
             
<postfield name="resId" value="<%=resId%>"/> 
             
<postfield name="content" value="<%=content%>"/>              
          
</go> 
       
</anchor>
        
<br/>
        
        
<%
              }

        
%>    
     共
<%=maxPage%>
     
<br/>
        
    
<anchor> 返回上级
          
<go href="/cars/search.do" method="post" accept-charset="UTF-8"> 
             
<postfield name="content" value="<%=content%>"/> 
          
</go> 
    
</anchor>
       
    
<br/>                                      
    
<%@include file="../bottom1_1.jsp"%>    

</p>

</card>

</wml>

很简单的,大家看看吧,我也参考了别人的代码……
posted on 2006-02-28 18:37 一凡 阅读(620) 评论(1)  编辑  收藏 所属分类: JAVA 基础

评论:
# re: JAVA字符串分页 2009-01-08 17:32 | 那么
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