JAVA字符串分页

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"/> ' >


 <%
 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' />
 
 <%
 }
 out.print(resName);
 out.print( " " );
 out.print(outputContent);

 %>
 

 <%
 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>
 
 <%
 } ; 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>
 

 <%
 }
 %>
 共 <%= maxPage %> 页
 

 < anchor > 返回上级
 < go href = " /cars/search.do " method = " post " accept - charset = " UTF-8 " >
 < postfield name = " content " value = " <%=content%> " />
 </ go >
 </ anchor >

 

<% @include file = " ../bottom1_1.jsp " %>



</ card >

</ wml >

很简单的，大家看看吧，我也参考了别人的代码……

JAVA字符串分页

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