Java逻辑分页代码

前台jsp代码如下：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>

<title>office模版管理</title>

<%@include file="/commons/include/manageCommon.jsp"%>

<link rel="stylesheet" href="${ctx}/assets/stylesheets/thestyle.css" />

<script type="text/javascript">

    function showOffice(officeName,officeExt,hideOfficePath){

        window.location.href="${ctx}/platform/system/sysOffice/download.ht?officeName="+officeName+"&officeExt="+officeExt+"&hideOfficePath="+hideOfficePath;

    }

    function editOffice(officePath,officeExt){

        if(officeExt != "doc" && officeExt != "DOC" && officeExt != "docx" && officeExt != "DOCX"){

            layer.msg("请选择doc或docx格式的文书进行编辑！", {

                time: 2000,

                type: 1,

                skin: "layer-tips-box",

                anim: 1,

                offset: "30%",

                content: content1.replace("#tips#", "请选择doc或docx格式的文书进行编辑！")

            });

            return false;

        }

        window.location.href = "edit.ht?officePath="+officePath;

    }

    function changePageSize(){

        var pageSize = $("#pageSizeSelect option:selected").val();

        $("#pageSizeSpan").html(pageSize);

        $("#pageSize").val(pageSize);

        var currentPage = $("#currentPageInput").val();

        $("#currentPage").val(currentPage);

        $("#searchForm").submit();

    }

    function first(){

        $("#currentPage").val(parseInt(1));

        $("#currentPageInput").val(parseInt(1));

        $("#searchForm").submit();

    }

    function previous(){

        var currentPage = $("#currentPageInput").val();

        if(parseInt(currentPage)-1 >= parseInt(1)){

            $("#currentPage").val(parseInt(currentPage)-1);

            $("#currentPageInput").val(parseInt(currentPage)-1);

        }

        $("#searchForm").submit();

    }

    function next(){

        var currentPage = $("#currentPageInput").val();

        if(parseInt(currentPage)+1 <= parseInt("${totalPage}")){

            $("#currentPage").val(parseInt(currentPage)+1);

            $("#currentPageInput").val(parseInt(currentPage)+1);

        }

        $("#searchForm").submit();

    }

    function last(){

        $("#currentPage").val(parseInt("${totalPage}"));

        $("#currentPageInput").val(parseInt("${totalPage}"));

        $("#searchForm").submit();

    }

    function jumpTo(){

        var currentPage = $("#currentPageInput").val();

        $("#currentPage").val(parseInt(currentPage));

        $("#searchForm").submit();

    }

</script>

</head>

<body>

    <div class="panel">

        <div class="panel-heading">

            <form id="searchForm" method="post" action="list.ht" class="form-inline inputFrom">

                <div class="form-group">

                    <span>文书名称:</span> <input type="text" name="officeName"

                        class="form-control input-sm" value="${officeName}" />

                </div>

                <input id="pageSize" name="pageSize" value="${pageSize }" style="display:none"/>

                <input id="currentPage" name="currentPage" value="${currentPage }" style="display:none"/>

            </form>

        </div>

        <div class="panel-body">

            <c:set var="checkAll">

                <input type="checkbox" id="chkall"/>

            </c:set>

            <display:table name="sysOfficeList" id="sysOfficeItem" requestURI="list.ht" sort="external" cellpadding="1" cellspacing="1"

                class="table-grid table table-bordered table-striped table-hover text-center">

                <display:caption>

                    <div class="btn-group-p">

                        <a class="btn btn-primary link search" id="btnSearch">

                            <span class="fa fa-search">查询</span>

                        </a>

                        <a class="btn btn-primary" href="add.ht">

                            <span class="fa fa-plus">添加</span>

                        </a>

                        <a class="btn btn-primary link del" action="del.ht">

                            <span class="fa fa-times">批量删除</span>

                        </a>

                    </div>

                </display:caption>

                <display:column title="${checkAll}" media="html" style="width:30px;">

                    <input type="checkbox" class="pk" name="officePath" value="${sysOfficeItem.officePath}">

                </display:column>

                <display:column title="文书名称" class="text-left">

                <%-- <a class="titleTip"  title="${sysOfficeItem.officeName}" href="javascript:void(0)" onclick="showOffice('${sysOfficeItem.officeName}','${sysOfficeItem.officeExt}','${sysOfficeItem.hideOfficePath}')"> --%>

                <a class="titleTip"  title="${sysOfficeItem.officeName}" href="get.ht?officePath=${sysOfficeItem.officePath}">

                      ${fn:substring(sysOfficeItem.officeName,0,10)}${fn:length(sysOfficeItem.officeName)>10?'...':''}

                </a>

                </display:column>

                <display:column title="文书后缀">

                    ${sysOfficeItem.officeExt}

                </display:column>

                <display:column title="文书路径">

                    <span class="titleTip"  title="${sysOfficeItem.officePath}">

                        ${fn:substring(sysOfficeItem.officePath,0,80)}${fn:length(sysOfficeItem.officePath)>80?'...':''}

                    </span>

                </display:column>

                <display:column title="管理" media="html"  class="row-nowrap text-center">

                    <a href="get.ht?officePath=${sysOfficeItem.officePath}" class="link detail gray leave-blank">明细</a>

                    <a onclick="editOffice('${sysOfficeItem.officePath}','${sysOfficeItem.officeExt}')" href="javascript:void(0)" class="link edit gray leave-blank">编辑</a>

                    <a href="del.ht?officePath=${sysOfficeItem.officePath}" class="link del gray leave-blank">删除</a>

                </display:column>

            </display:table>

            <div class="btn-group" style="background-color: white;width: 100%">

                <div style="float: left;">

                    <span>每页记录</span>

                    <select id="pageSizeSelect" name="pageSizeSelect" onchange="changePageSize()" class="input-sm" style="margin: 0 5px;">

                        <option value="5" <c:out value="${pageSize eq '5'? 'selected' : '' }"/>>5</option>

                        <option value="10" <c:out value="${pageSize eq '10'? 'selected' : '' }"/>>10</option>

                        <option value="15" <c:out value="${pageSize eq '15'? 'selected' : '' }"/>>15</option>

                        <option value="20" <c:out value="${pageSize eq '20'? 'selected' : '' }"/>>20</option>

                        <option value="50" <c:out value="${pageSize eq '50'? 'selected' : '' }"/>>50</option>

                        <option value="100" <c:out value="${pageSize eq '100'? 'selected' : '' }"/>>100</option>

                    </select>

                    <a href="javascript:window.location.reload()"><span class="fa fa-refresh" style="display: inline-block;margin:0 5px;"></span></a>

                    <span style="display: inline-block;margin:0 5px;">显示记录从1到<span id="pageSizeSpan" name="pageSizeSpan">10</span>，总数 ${totalNum }条</span>

                    <a href="javascript:;" onclick="first()" title="首页"><span class="fa fa-step-backward" style="display: inline-block;margin:0 5px;"></span></a>

                    <a href="javascript:;" onclick="previous();" title="上一页" ><span class="fa fa-chevron-left"></span></a>

                    <span style="display: inline-block;margin:0 5px;">

                        <input class="pageInputText" size="4" value="${currentPage}" maxlength="4" type="text" id="currentPageInput" name="currentPageInput" style="width: 35px;border: 1px solid #ddd;height: 24px;line-height: 24px;">/<span style="margin-left:4px;">${totalPage }</span>

                    </span>

                    <a href="javascript:;" onclick="next()" title="下一页" ><span class="fa fa-chevron-right" style="display: inline-block;margin:0 5px;"></span></a>

                    <a href="javascript:;" onclick="last()" title="尾页" ><span class="fa fa-step-forward" style="display: inline-block;margin:0 5px;"></span></a>

                    <input type="button" id="btnGo" value="GO" onclick="jumpTo();" class="btn btn-primary">

                    <div class="l-clear"></div>

                </div>

            </div>

        </div><!-- end of panel-body -->

    <!-- end of panel -->

</body>

<!-- 提示 -->

<link rel="stylesheet" type="text/css" href="${ctx}/js/poshytip-1.2/tip-yellowsimple/tip-yellowsimple.css" />

<script type="text/javascript" src="${ctx}/js/poshytip-1.2/jquery.poshytip.js"></script>

<script type="text/javascript" src="${ctx}/js/util/toolTipCommon.js"></script>

</html>

后台Java代码如下：

package com.ksource.platform.controller.system;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.io.PrintWriter;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLEncoder;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import javax.annotation.Resource;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.ksource.platform.model.system.SysAuditModelType;

import com.ksource.platform.model.system.SysFile;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

import org.springframework.web.multipart.MultipartFile;

import org.springframework.web.multipart.MultipartHttpServletRequest;

import org.springframework.web.servlet.ModelAndView;

import com.ksource.core.annotion.Action;

import com.ksource.core.annotion.ActionExecOrder;

import com.ksource.core.util.AppConfigUtil;

import com.ksource.core.util.FileUtil;

import com.ksource.core.web.ResultMessage;

import com.ksource.core.web.controller.BaseController;

import com.ksource.core.web.query.QueryFilter;

import com.ksource.core.web.util.RequestUtil;

import com.ksource.platform.service.system.SysFileService;

import com.ksource.pwlp.controller.system.SysOffice;

@Controller

@RequestMapping({ "/platform/system/sysOffice/" })

@Action(ownermodel = SysAuditModelType.BASICDATA_MANAGEMENT)

public class SysOfficeController extends BaseController {

    @Resource

    private SysFileService sysFileService;

    /**

     * 查看系统文书模版分页列表

     * @param request

     * @return

     * @throws Exception

     */

    @RequestMapping({ "list" })

    @Action(description = "查看系统文书模版分页列表", detail = "查看系统文书模版分页列表")

    public ModelAndView list(HttpServletRequest request) throws Exception {

        QueryFilter filter = new QueryFilter(request, "sysOfficeItem");

        String officePath = request.getSession().getServletContext().getRealPath("/")+"WEB-INF/fileTemplate/office";

        List<SysOffice> sysOfficeList = new ArrayList<SysOffice>();

        findFileList(new File(officePath),sysOfficeList,filter);

        //pageSize 每页展示个数

        int pageSize = RequestUtil.getInt(request, "pageSize",10);

        //currentPage 当前页

        int currentPage = RequestUtil.getInt(request, "currentPage",1);

        //totalNum 总数

        int totalNum = sysOfficeList.size();

        //totalPage 总页数

        int totalPage = 0;

        if(sysOfficeList.size() % pageSize==0){

            //说明整除，正好每页显示pageSize条数据，没有多余一页要显示少于pageSize条数据的

            totalPage = sysOfficeList.size() / pageSize;

        }else{

            //不整除，就要在加一页，来显示多余的数据。

            totalPage = sysOfficeList.size() / pageSize + 1;

        }

        List<SysOffice> officeList = new ArrayList<SysOffice>();

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

            if(i < totalNum){

                officeList.add(sysOfficeList.get(i));

            }

        }

        ModelAndView mv = getAutoView().addObject("sysOfficeList", officeList).addObject("pageSize", pageSize).addObject("currentPage", currentPage).addObject("totalNum", totalNum).addObject("totalPage", totalPage);

        Object obj = filter.getFilters().get("officeName");

        if(obj != null){

            String officeName = obj.toString();

            mv.addObject("officeName", officeName);

        }

        return mv;

    }

    /**

     * 查看系统文书模版明细

     * @param request

     * @return

     * @throws Exception

     */

    @RequestMapping({ "get" })

    @Action(description = "查看系统文书模版明细", detail = "查看系统文书模版明细")

    public ModelAndView get(HttpServletRequest request) throws Exception {

        String officePath = RequestUtil.getString(request, "officePath");

        SysOffice sysOffice = new SysOffice();

        File file = new File(officePath);

        if(file != null){

            String officeName = file.getName().substring(0, file.getName().lastIndexOf("."));

            sysOffice.setOfficeName(officeName);

            String officeExt = file.getName().substring(file.getName().lastIndexOf(".")+1, file.getName().length());

            sysOffice.setOfficeExt(officeExt);

            sysOffice.setOfficePath(officePath);

            sysOffice.setHideOfficePath(sysOffice.getOfficePath().replace("\\", "//"));

        }

        return getAutoView().addObject("sysOffice", sysOffice);

    }

    /**

     * 编辑文书模板页面

     * @param response

     * @param request

     * @return

     * @throws Exception

     */

    @RequestMapping("/add")

    @Action(description = "编辑文书模板页面", detail = "编辑文书模板页面")

    public ModelAndView add(HttpServletResponse response, HttpServletRequest request) throws Exception {

        String officePath = RequestUtil.getString(request, "officePath", "");

        SysOffice sysOffice = new SysOffice();

        if(!"".equals(officePath)){

            File file = new File(officePath);

            if(file != null){

                String officeName = file.getName().substring(0, file.getName().lastIndexOf("."));

                sysOffice.setOfficeName(officeName);

                String officeExt = file.getName().substring(file.getName().lastIndexOf(".")+1, file.getName().length());

                sysOffice.setOfficeExt(officeExt);

                sysOffice.setOfficePath(officePath);

                sysOffice.setHideOfficePath(sysOffice.getOfficePath().replace("\\", "//"));

            }

        }

        ModelAndView mv = this.getAutoView();

        return mv.addObject("sysOffice", sysOffice);

    }

    /**

     * 编辑文书模板页面

     * @param response

     * @param request

     * @return

     * @throws Exception

     */

    @RequestMapping("/edit")

    @Action(description = "编辑文书模板页面", detail = "编辑文书模板页面")

    public ModelAndView edit(HttpServletResponse response, HttpServletRequest request) throws Exception {

        String officePath = RequestUtil.getString(request, "officePath", "");

        SysOffice sysOffice = new SysOffice();

        if(!"".equals(officePath)){

            File file = new File(officePath);

            if(file != null){

                String officeName = file.getName().substring(0, file.getName().lastIndexOf("."));

                sysOffice.setOfficeName(officeName);

                String officeExt = file.getName().substring(file.getName().lastIndexOf(".")+1, file.getName().length());

                sysOffice.setOfficeExt(officeExt);

                sysOffice.setOfficePath(officePath);

                sysOffice.setHideOfficePath(sysOffice.getOfficePath().replace("\\", "//"));

            }

        }

        ModelAndView mv = this.getAutoView();

        return mv.addObject("sysOffice", sysOffice);

    }

    /**

     * 加载文书模板

     * @param response

     * @param request

     * @return

     * @throws Exception

     */

    @RequestMapping("/editTemplate")

    public ModelAndView editTemplate(HttpServletResponse response, HttpServletRequest request) throws Exception {

        String hideOfficePath = RequestUtil.getString(request, "hideOfficePath");

        ModelAndView mv = this.getAutoView();

        if(!"".equals(hideOfficePath)){

            File file = new File(hideOfficePath.replace("//", "\\"));

            if(file != null){

                String officeName = file.getName().substring(0, file.getName().lastIndexOf("."));

                String officeExt = file.getName().substring(file.getName().lastIndexOf(".")+1, file.getName().length());

                mv.addObject("officeName", officeName);

                mv.addObject("officeExt", officeExt);

            }

        }

        mv.addObject("hideOfficePath", hideOfficePath);

        return mv;

    }

    /**

     * 获取文书模板

     * @param request

     * @param response

     * @throws Exception

     */

    @RequestMapping("getTemplate")

    @Action(description = "获取文书模板", detail = "获取文书模板")

    public void getTemplate(HttpServletRequest request, HttpServletResponse response) throws Exception {

        String hideOfficePath = RequestUtil.getString(request, "hideOfficePath");

        hideOfficePath = java.net.URLDecoder.decode(hideOfficePath , "UTF-8");

        hideOfficePath = hideOfficePath.replace("/", "\\");

        byte[] readByte = FileUtil.readByte(hideOfficePath);

        try {

            response.getOutputStream().write(readByte);

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

    @RequestMapping({ "saveOffice" })

    @Action(description = "保存文书模板", execOrder = ActionExecOrder.AFTER)

    public void saveFile(MultipartHttpServletRequest request, HttpServletResponse response) throws Exception {

        String hideOfficePath = RequestUtil.getString(request, "hideOfficePath");

        PrintWriter writer = response.getWriter();

        try {

            Map files = request.getFileMap();

            Iterator it = files.values().iterator();

            while (it.hasNext()) {

                MultipartFile f = (MultipartFile) it.next();

                File file = new File(hideOfficePath);

                if (file.exists()) {

                    file.delete();

                }

                FileUtil.writeByte(hideOfficePath, f.getBytes());

                writeResultMessage(writer, "保存文书模板成功！", ResultMessage.Success);

            }

        } catch (Exception e) {

                writeResultMessage(writer, "保存文书模板失败！", ResultMessage.Fail);

        }

    }

    /**

     * 删除系统文书模版

     * @param request

     * @param response

     * @throws Exception

     */

    @RequestMapping({ "del" })

    @Action(description = "删除系统文书模版", execOrder = ActionExecOrder.BEFORE, detail = "删除系统文书模版:<#list StringUtils.split(id,\",\") as item><#assign entity=sysOfficeTemplateService.getById(Long.valueOf(item))/>【${entity.subject}】</#list>")

    public void del(HttpServletRequest request, HttpServletResponse response) throws Exception {

        String preUrl = RequestUtil.getPrePage(request);

        ResultMessage message;

        try {

            String[] officePath = RequestUtil.getStringAryByStr(request, "officePath");

            for (int i = 0; i < officePath.length; i++) {

                File file = new File(officePath[i]);

                if (file.isFile()) {

                    file.delete();

                }

            }

            message = new ResultMessage(1, "删除文书成功！");

        } catch (Exception ex) {

            message = new ResultMessage(0, "删除文书失败:" + ex.getMessage());

        }

        addMessage(message, request);

        response.sendRedirect(preUrl);

    }

    /**

     * 文件下载

     *

     * @Description:

     * @param fileName

     * @param request

     * @param response

     * @return

     * @throws Exception

     */

    @RequestMapping("/download")

    public String downloadFile(HttpServletRequest request,

            HttpServletResponse response) throws Exception {

        String officeName = RequestUtil.getString(request, "officeName");

        officeName = java.net.URLDecoder.decode(officeName , "UTF-8");

        String officeExt = RequestUtil.getString(request, "officeExt");

        String fullOfficeName = officeName + "." + officeExt;

        fullOfficeName = fullOfficeName.replace(" ", "");

        fullOfficeName = URLEncoder.encode(fullOfficeName,"UTF-8");

        String hideOfficePath = RequestUtil.getString(request, "hideOfficePath");

        String officePath = hideOfficePath.replace("//", "\\");

        if (officePath != null && !"".equals(officePath)) {

            File file = new File(officePath);

            if (file.exists()) {

                response.setContentType("application/force-download");// 设置强制下载不打开

                response.setHeader("Content-disposition","attachment; filename="+fullOfficeName);

                byte[] buffer = new byte[1024];

                FileInputStream fis = null;

                BufferedInputStream bis = null;

                try {

                    fis = new FileInputStream(file);

                    bis = new BufferedInputStream(fis);

                    OutputStream os = response.getOutputStream();

                    int i = bis.read(buffer);

                    while (i != -1) {

                        os.write(buffer, 0, i);

                        i = bis.read(buffer);

                    }

                } catch (Exception e) {

                    // TODO: handle exception

                    e.printStackTrace();

                } finally {

                    if (bis != null) {

                        try {

                            bis.close();

                        } catch (IOException e) {

                            // TODO Auto-generated catch block

                            e.printStackTrace();

                        }

                    }

                    if (fis != null) {

                        try {

                            fis.close();

                        } catch (IOException e) {

                            // TODO Auto-generated catch block

                            e.printStackTrace();

                        }

                    }

                }

            }

        }

        return null;

    }  

    /**

     * 上传文书到指定目录

     * @param request

     * @param response

     * @throws Exception

     */

    @RequestMapping({ "upload" })

    @ResponseBody

    @Action(description = "上传文书到指定目录")

    public Map upload(HttpServletRequest request, HttpServletResponse response) throws Exception {

        Long[] sysOfficeIds = RequestUtil.getLongAryByStr(request, "sysOfficeIds");

        Map map = new HashMap();

        for (int m = 0; m < sysOfficeIds.length; m++) {

            long fileId = sysOfficeIds[m];

            if (fileId == 0L) {

                map.put("result", "fileIdIsZero");

                return map;

            }

            SysFile sysFile = this.sysFileService.getById(Long.valueOf(fileId));

            if (sysFile == null) {

                map.put("result", "fileNoExist");

                return map;

            }

            String fileName = sysFile.getFileName() + "." + sysFile.getExt();

            String fileServicePath = AppConfigUtil.get("file_server_addr");

            String fullPath = "http://" + fileServicePath + File.separator + sysFile.getFilePath().replace("/", File.separator);

            fullPath = fullPath.replace("\\", "/");

            String uploadlujing = request.getSession().getServletContext().getRealPath("/")+"WEB-INF/fileTemplate/office";

            saveUrlAs(fullPath, uploadlujing, fileName, "GET");

        }

        map.put("result", "fileUploadEnd");

        return map;

    }

    public static void findFileList(File dir, List<SysOffice> sysOfficeList, QueryFilter queryFilter) {

        if (!dir.exists() || !dir.isDirectory()) {// 判断是否存在目录

            return;

        }

        String[] files = dir.list();// 读取目录下的所有目录文件信息

        for (int i = 0; i < files.length; i++) {// 循环，添加文件名或回调自身

            File file = new File(dir, files[i]);

            if (file.isFile()) {// 如果文件

                SysOffice sysOffice = new SysOffice();

                if(file.getName() != null){

                    String officeName = file.getName().substring(0, file.getName().lastIndexOf("."));

                    Object obj = queryFilter.getFilters().get("officeName");

                    if(obj != null){

                        String ofn = obj.toString();

                        if(!"".equals(ofn) && ofn != null){

                            if(!officeName.contains(ofn)){

                                continue;

                            }

                        }

                    }

                    sysOffice.setOfficeName(officeName);

                    String officeExt = file.getName().substring(file.getName().lastIndexOf(".")+1, file.getName().length());

                    sysOffice.setOfficeExt(officeExt);

                }

                sysOffice.setOfficePath(dir + "\\" + file.getName());

                sysOffice.setHideOfficePath(sysOffice.getOfficePath().replace("\\", "//"));

                sysOfficeList.add(sysOffice);// 添加文件全路径名

            } else {// 如果是目录

                findFileList(file, sysOfficeList, queryFilter);// 回调自身继续查询

            }

        }

    }

    public static File saveUrlAs(String url, String filePath, String fileName, String method) {

        // System.out.println("fileName---->"+filePath);

        // 创建不同的文件夹目录

        File file = new File(filePath);

        // 判断文件夹是否存在

        if (!file.exists()) {

            // 如果文件夹不存在，则创建新的的文件夹

            file.mkdirs();

        }

        FileOutputStream fileOut = null;

        HttpURLConnection conn = null;

        InputStream inputStream = null;

        try {

            // 建立链接

            URL httpUrl = new URL(url);

            conn = (HttpURLConnection) httpUrl.openConnection();

            // 以Post方式提交表单，默认get方式

            conn.setRequestMethod(method);

            conn.setDoInput(true);

            conn.setDoOutput(true);

            // post方式不能使用缓存

            conn.setUseCaches(false);

            // 连接指定的资源

            conn.connect();

            // 获取网络输入流

            inputStream = conn.getInputStream();

            BufferedInputStream bis = new BufferedInputStream(inputStream);

            // 判断文件的保存路径后面是否以/结尾

            if (!filePath.endsWith("/")) {

                filePath += "/";

            }

            // 写入到文件（注意文件保存路径的后面一定要加上文件的名称）

            fileOut = new FileOutputStream(filePath + fileName);

            BufferedOutputStream bos = new BufferedOutputStream(fileOut);

            byte[] buf = new byte[4096];

            int length = bis.read(buf);

            // 保存文件

            while (length != -1) {

                bos.write(buf, 0, length);

                length = bis.read(buf);

            }

            bos.close();

            bis.close();

            conn.disconnect();

        } catch (Exception e) {

            e.printStackTrace();

            System.out.println("抛出异常！！");

        }

        return file;

    }

}

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