Excel文件导入导出实战(4)--上传下载
2016-08-11 17:42
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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><base href="<%=basePath%>"><title>My JSP 'importList.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><link rel="stylesheet" type="text/css" href="css/common.css" /><script type="text/javascript" src="../js/jquery-easyui-1.2.6/jquery-1.7.2.min.js"></script><link rel="stylesheet" type="text/css" href="../js/jquery-easyui-1.2.6/themes/default/easyui.css" /><link rel="stylesheet" type="text/css" href="../js/jquery-easyui-1.2.6/themes/icon.css" /><script type="text/javascript" src="../js/jquery-easyui-1.2.6/jquery.easyui.min.js"></script><script type="text/javascript" src="../js/jquery-easyui-1.2.6/locale/easyui-lang-zh_CN.js"></script><script type="text/javascript" src="../js/commons.js"></script><link rel="stylesheet" type="text/css" href="css/uploadify.css" /><script type="text/javascript" src="../js/swfobject.js"></script><script type="text/javascript" src="../js/jquery.uploadify.v2.1.0.min.js"></script><script type="text/javascript">$(function(){//文件上传uploadify$('#fileInput').uploadify({'uploader': 'js/swf/uploadify.swf','script': 'importdata-upload', //指定服务端处理类的入口'scriptData' :{'templateId':$('#templates').combobox('getValue')}, //参数'folder': 'default','fileDataName': 'fileInput', //和input的name属性值保持一致就好，Struts2就能处理了'queueID': 'fileQueue','auto': false,//是否选取文件后自动上传'multi': true,//是否支持多文件上传'fileDesc' : 'Excel文档','fileExt' : '*.xls','sizeLimit' : 1024*1024,//最大1M'simUploadLimit' : 1,//每次最大上传文件数'buttonImg': 'images/preview.png',//按钮上的图片'buttonCursor':'hand',//鼠标悬停在按钮时的样子'buttonText': ' ',//按钮上的文字'onComplete': function (event, queueID, fileObj, response, data) {//alert(response);var result = eval("(" +response + ")" );var status = result.status;var msg = result.message;if(status.trim() =="ok" || status.trim()=="OK"){$.messager.alert("提示信息",msg);$('#importDialog').dialog('close');$('#t_importdata').datagrid('load',null);//刷新表格数据}else{$.messager.alert("提示信息",msg);}}});/*** 初始化数据表格*/$('#t_importdata').datagrid({//idField:'id' ,//有这个属性的时候getSelections可能出问题title:'数据列表' ,fit:true ,height:450 ,url:'importdata-list' ,fitColumns:true ,striped: true , //隔行变色特性loadMsg: '数据正在加载,请耐心的等待...' ,rownumbers:true ,frozenColumns:[[ //冻结列特性 ,不要与fitColumns 特性一起使用{field:'ck' ,width:50 ,checkbox: true}]],columns:[[{field:'importid' ,title:'主表id' ,width:100 ,hidden:true},{field:'importDataType' ,title:'数据类型' ,width:100 ,sortable : true},{field:'importDate' ,title:'导入时间' ,width:100 ,sortable : true},{field:'importStatus' ,title:'导入标志' ,width:100 ,formatter:function(value , record , index){if(value == 1){return '导入成功' ;} else if( value == 0){return '导入失败' ;}}},{field:'handleDate' ,title:'处理时间' ,width:100},{field:'handleStatus' ,title:'处理标志' ,width:100 ,formatter:function(value , record , index){if(value == 1){return '已处理' ;} else if( value == 0){return '未处理' ;}}}]] ,pagination: true ,pageSize: 10 ,pageList:[5,10,15,20,50],//从这里开始加功能按钮实现导入模板//添加toolbar,定义导入模板和明细查看按钮toolbar:[{text:'删除',iconCls:'icon-cancel',handler:function(){var rows=$("#t_importdata").datagrid("getSelections");if(rows.length==0){$.messager.alert("提示信息","请选择要删除的行");return;}var importids="";for(var i=0;i<rows.length;i++){if(importids=="" || importids==null){importids = rows[i].importid;}else{importids = importids +","+ rows[i].importid;}}$.messager.confirm("提示","确定删除么?",function (res) {if(res){$.ajax({url:'importdata-deleteByID',type:'POST',dataType:'json',data:{importids:importids},success:function(data){$('#t_importdata').datagrid('load',null);//刷新表格数据}});}});}},{text:'导入模板',iconCls:'icon-add',handler:function(){$('#templateDialog').dialog('open'); //点击导入模板打开dialog}},{text:'导入明细查看',iconCls:'icon-edit',handler:function(){//动态创建datagrid$('#divDataGrid').html('<table id="tatalTb"></table>');var arr = $('#t_importdata').datagrid('getSelections');if(arr.length != 1){$.messager.alert('提示信息','只能选择一条记录进行查看！');return;}else{$('#importDetailsDialog').dialog('open');$.ajax({url:'importdata-columns',type:'POST',dataType:'json',data:{templateId:arr[0].importDataType},success:function(data){$('#tatalTb').datagrid({url: 'importdata-columndatas',fitColumns: true,idField:"appId",columns:data,queryParams:{importDataId:arr[0].importid},toolbar:[{text:'确认导入',iconCls:'icon-add',handler:function(){//只有未处理并且没有错误代码的数据允许确认导入var detailDatas = $('#tatalTb').datagrid('getData');for(var i = 0;i<detailDatas.length;i++){var cgbz = detailDatas.rows[i].cgbz;var hcode = detailDatas.rows[i].hcode;if(cgbz!="未处理" || (hcode.indexOf("#000")>=0)){$.messager.alert("提示信息","已处理或数据有误，请核对后再重新导入！");return;}}$.ajax({url:'importdata-doimport',type:"POST",dataType:'json',data:{importDataId:arr[0].importid},success:function(data){var status = data.status;var message = data.message;if(status == "ok"){$.messager.alert("提示信息",message);$('#tatalTb').datagrid('reload',null);}else{$.messager.alert("提示信息",message);}}});}},{text:'返回',iconCls:'icon-back',handler:function(){$('#importDetailsDialog').dialog('close');}}]});}});}}}]});$('#okBtn').click(function(){//获取选择模板IDvar str = $('#templates').combobox('getValue');//获取当前选中的值if(str==null || str==""){$.messager.alert("提示信息","请选择模板!");return;}$('#templateDialog').dialog('close');$('#importDialog').dialog('open');var val = "download?templateId=" + str;//超链接的形式发送下载请求$('#downloadTemplate').attr('href',val);});$('#uploadBtn').click(function(){var val = $('#templates').combobox('getValue');$('#fileInput').uploadifySettings('scriptData',{'templateId':val});$('#fileInput').uploadifyUpload();});});</script></head><body><div id="lay" class="easyui-layout" style="width: 100%;height:100%" ><div region="center" ><table id="t_importdata"></table></div></div><div id="templateDialog" title="选择模板" modal=true draggable=falseclass="easyui-dialog" closed=true style="width: 350px;height:220px"><form action=""><table><tr><td>选择模板：</td><td><input id="templates" name="templates" class="easyui-combobox" panelHeight="auto"url="importdata-templates" valueField="templateId" textField="templateName" value="" /><a id="okBtn" class="easyui-linkbutton">确定</a></td></tr></table></form></div><div id="importDialog" title="导入Excel" modal=true draggable=false class="easyui-dialog" closed=true style="width:350px;height:220px;"><form id="importForm" action="importdata-upload" method="post"><table><tr><td>下载模板:</td><td><a id = "downloadTemplate" >点击下载模板</a></td></tr><tr><td>浏览(上传):</td><td><input id="fileInput" name="fileInput" type="file" /></td></tr><tr><td colspan="2"><%--进度条--%><div id="fileQueue"></div><a id="uploadBtn" class="easyui-linkbutton" >导入</a></td></tr></table></form></div><div id="importDetailsDialog" title="导入明细查看" modal=true draggable=false class="easyui-dialog" closed=true style="width:800px;height:500px;"><div id="divDataGrid"></div></div></body></html>上面就是导入操作的界面。涉及到uploadify,easyUI等。在看看对应的action:package com.huangteng.demo.action;import com.alibaba.fastjson.JSON;import com.huangteng.demo.model.ColumnInfo;import com.huangteng.demo.model.ImportData;import com.huangteng.demo.model.ImportDataDetail;import com.huangteng.demo.model.Template;import com.huangteng.demo.service.ImportDataService;import com.opensymphony.xwork2.ActionSupport;import net.sf.json.JSONArray;import org.apache.commons.beanutils.BeanUtils;import org.apache.commons.io.FileUtils;import org.apache.commons.lang3.StringUtils;import org.apache.poi.hssf.usermodel.HSSFCell;import org.apache.poi.hssf.usermodel.HSSFRow;import org.apache.poi.hssf.usermodel.HSSFSheet;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.struts2.ServletActionContext;import org.jdom.Document;import org.jdom.Element;import org.jdom.input.SAXBuilder;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.File;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.List;/*** Created by ht on 2016/8/8.*/public class importDataAction extends ActionSupport{private ImportDataService importDataService = new ImportDataService();private List<ImportData> importDataList = new ArrayList<ImportData>();//分页属性private int page;private int rows;private String sort;private String order;//模板idprivate String templateId;//输入文件private File fileInput;private String importids;public String getImportids() {return importids;}public void setImportids(String importids) {this.importids = importids;}public String getImportDataId() {return importDataId;}public void setImportDataId(String importDataId) {this.importDataId = importDataId;}private String importDataId;public File getFileInput() {return fileInput;}public void setFileInput(File fileInput) {this.fileInput = fileInput;}public String getTemplateId() {return templateId;}public void setTemplateId(String templateId) {this.templateId = templateId;}public String getOrder() {return order;}public void setOrder(String order) {this.order = order;}public ImportDataService getImportDataService() {return importDataService;}public void setImportDataService(ImportDataService importDataService) {this.importDataService = importDataService;}public List<ImportData> getImportDataList() {return importDataList;}public void setImportDataList(List<ImportData> importDataList) {this.importDataList = importDataList;}public int getPage() {return page;}public void setPage(int page) {this.page = page;}public int getRows() {return rows;}public void setRows(int rows) {this.rows = rows;}public String getSort() {return sort;}public void setSort(String sort) {this.sort = sort;}public String execute(){return SUCCESS;}//获取数据导入的数据列表public void list(){HttpServletResponse response = ServletActionContext.getResponse();response.setContentType("text/html;charset=utf-8");importDataList = importDataService.list(page,rows,sort,order);String json="{"+"\"total\":"+importDataList.size()+","+"\"rows\":"+ JSON.toJSONString(importDataList)+"}";//System.out.println(json);try {response.getWriter().write(json);} catch (IOException e) {e.printStackTrace();}}//获取导入模板，并打印在导入模板选择的下拉选public void templates(){HttpServletResponse response = ServletActionContext.getResponse();response.setContentType("text/html;charset=utf-8");List<Template> list = new ArrayList<Template>();Template t = new Template();//模板文件在web/template/student.xmlt.setTemplateId("student");t.setTemplateName("student");list.add(t);try {response.getWriter().write(JSON.toJSONString(list));} catch (IOException e) {e.printStackTrace();}}/*** 上传模板* 涉及xml文件解析，文件上传等知识点* Created by ht on 2016/8/9.*/public void upload(){//获取responseHttpServletResponse response = ServletActionContext.getResponse();response.setContentType("text/html;charset=utf-8");//获取时间并转字符串SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");String dateNow = sdf.format(new Date());//保存主表信息ImportData importData = new ImportData();importData.setImportid(String.valueOf(System.currentTimeMillis()));importData.setImportDataType(templateId);importData.setImportDate(dateNow);importData.setImportStatus("1");//导入成功importData.setHandleDate(null);importData.setHandleStatus("0");//未处理importDataService.saveImportData(importData);//解析模板try{//1 获取模板文件String path = ServletActionContext.getServletContext().getRealPath("/template");path = path +"\\"+templateId+".xml";File file = new File(path);//2 POI登场 读取Excel文件HSSFWorkbook wb = new HSSFWorkbook(FileUtils.openInputStream(fileInput));HSSFSheet sheet = wb.getSheetAt(0);//3 解析xml模板文件 用SaxBuilderSAXBuilder builder = new SAXBuilder();Document parse = builder.build(file);Element root = parse.getRootElement();//获取到根元素Element tbody = root.getChild("tbody");Element tr = tbody.getChild("tr");List<Element> children = tr.getChildren("td");//获取开始行和开始列int firstRow = tr.getAttribute("firstrow").getIntValue();int firstCol = tr.getAttribute("firstcol").getIntValue();//获取Excel最后一行行号int lastRowNum = sheet.getLastRowNum();//循环每一行，处理数据for(int i=firstRow;i<=lastRowNum;i++){//初始化明细数据ImportDataDetail importDataDetail = new ImportDataDetail();importDataDetail.setImportid(importData.getImportid());importDataDetail.setCgbz("0");//未处理//读取某行HSSFRow row = sheet.getRow(i);//对该行的非空判断if(isEmptyRow(row)){continue; //跳过接下来的步骤}int lastCellNum = row.getLastCellNum();//获取一行最后的列号//行非空，对所有单元格取值for(int j=firstCol;j<lastCellNum;j++){Element td = children.get(j-firstCol);HSSFCell cell = row.getCell(j);//如果单元格为空，跳过if(cell == null){continue;}//获取单元格值String value = getCellValue(cell,td);//导入实体明细赋值if(StringUtils.isNotBlank(value)){//当value中有异常信息时，获取截取","后的数组，把错误编号和错误提示信息//分别存入对应的字段中//BeanUtils.setProperty提供三个参数，第一是JavaBean对象，第二个是要操作的属性名，第三个为要设置的具体的值if(value.indexOf("#000")>0){String[] info = value.split(",");importDataDetail.setHcode(info[0]);importDataDetail.setMsg(info[1]);BeanUtils.setProperty(importDataDetail,"col"+j,info[2]);}else{BeanUtils.setProperty(importDataDetail,"col"+j,value);}}}importDataService.saveImportDataDetail(importDataDetail);}String str = "{\"status\":\"OK\",\"message\":\"导入数据成功!\"}";response.getWriter().write(str);}catch (Exception e){String str = "{\"status\":\"noOK\",\"message\":\"导入数据失败!\"}";try {response.getWriter().write(str);} catch (IOException e1) {e1.printStackTrace();}e.printStackTrace();}}/*** 非空判断*/public Boolean isEmptyRow(HSSFRow row){boolean flag = true;for(int i=0;i<row.getLastCellNum();i++){HSSFCell cell =row.getCell(i);if(cell != null){if(StringUtils.isNotBlank(cell.toString())){return false;}}}return flag;}/*** 获取单元格的值*/public String getCellValue(HSSFCell cell,Element td){//首先获取单元格的位置int i = cell.getRowIndex()+1;int j = cell.getColumnIndex()+1;String returnValue = "";try{//获取模板文件对单元格格式的限制String type = td.getAttribute("type").getValue();boolean isNullAble = td.getAttribute("isnullable").getBooleanValue();int maxlength = 9999;if(td.getAttribute("maxlength")!=null){maxlength = td.getAttribute("maxlength").getIntValue();}//根据单元格格式取值String value = null;switch (cell.getCellType()){case HSSFCell.CELL_TYPE_STRING:{value = cell.getStringCellValue();break;}case HSSFCell.CELL_TYPE_NUMERIC:{//判断是不是日期if("data,datatime".indexOf(type)>=0){Date date = cell.getDateCellValue();SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");value = sdf.format(date);}else{value = String.valueOf(cell.getNumericCellValue());}break;}};//非空、长度校验if(!isNullAble && StringUtils.isBlank(value)){returnValue = "#0001,第" + i + "行第" +j +"列不能为空！"+"," + value;}else if(StringUtils.isNotBlank(value) && (value.length()>maxlength)){returnValue = "#0002,第" + i + "行第" +j +"列长度超过最大长度！"+"," + value;}else{returnValue = value;}}catch (Exception e){e.printStackTrace();}return returnValue;}/*** 动态获取表头信息*/public void columns(){HttpServletResponse response = ServletActionContext.getResponse();response.setContentType("text/html;charset=utf-8");//获取表头信息List<ColumnInfo> list = getColumns();//转换json对象返回String json ="["+ JSON.toJSONString(list) + "]";try {response.getWriter().write(json);} catch (IOException e) {e.printStackTrace();}}/*** 动态获取表头* @return*/private List<ColumnInfo> getColumns() {List<ColumnInfo> list = new ArrayList<ColumnInfo>();//获取模板文件String path = ServletActionContext.getServletContext().getRealPath("/template");path = path + "\\" + templateId + ".xml";File file = new File(path);//解析模板文件SAXBuilder builder = new SAXBuilder();try {Document parse = builder.build(file);Element root = parse.getRootElement();Element thead = root.getChild("thead");Element tr = thead.getChild("tr");List<Element> children = tr.getChildren();ColumnInfo c = null;//添加处理标志、失败代码，失败说明c = createColumnInfo("cgbz","处理标志",120,"center");list.add(c);c = createColumnInfo("hcode","失败代码",120,"center");list.add(c);c = createColumnInfo("msg","失败说明",120,"center");list.add(c);for (int i = 0; i < children.size(); i++) {Element th = children.get(i);String value = th.getAttribute("value").getValue();c = createColumnInfo("col"+i,value,120,"center");list.add(c);}} catch (Exception e) {e.printStackTrace();}return list;}/*** 创建column对象*/private ColumnInfo createColumnInfo(String fieldId, String title, int width,String align) {ColumnInfo c = new ColumnInfo();c.setField(fieldId);c.setTitle(title);c.setWidth(width);c.setAlign(align);return c;}/*** 获取明细数据*/public void columndatas(){HttpServletResponse response = ServletActionContext.getResponse();response.setContentType("text/html;charset=utf-8");//获取明细数据List<ImportDataDetail> list = importDataService.getImportDataDetailsByMainId(importDataId);String json = "{\"total\":"+list.size()+", \"rows\":"+JSON.toJSONString(list)+"}";try {response.getWriter().write(json);} catch (IOException e) {e.printStackTrace();}}/*** 确认导入*/public void doimport(){HttpServletResponse response = ServletActionContext.getResponse();response.setContentType("text/html;charset=utf-8");//将导入的明细数据已到student表中importDataService.saveStudents(importDataId);//修改主表、明细表处理标志及时间SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd");String dateNow = sf.format(new Date());importDataService.updImportDataStatus(dateNow, importDataId);importDataService.updImportDataDetailStatus(importDataId);String str = "{\"status\":\"ok\",\"message\":\"确认成功！\"}";try {response.getWriter().write(str);} catch (IOException e) {e.printStackTrace();}}/**** 删除*/public void deleteByID(){del(importids);}public void del(String importids){if(importids.indexOf(",")>0){String[] it=importids.split(",");for(int i=0;i<it.length;i++){importDataService.del(it[i]);}}else{importDataService.del(importids);}}}看看service:package com.huangteng.demo.service;import com.huangteng.demo.model.ImportData;import com.huangteng.demo.model.ImportDataDetail;import com.huangteng.demo.utils.DB;import com.mysql.jdbc.ConnectionFeatureNotAvailableException;import org.apache.commons.lang3.StringUtils;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import java.util.ArrayList;import java.util.List;/*** Created by ht on 2016/8/9.*/public class ImportDataService {//从数据库查询导入项目信息public List<ImportData> list(int currentPage, int pageSize,String sort,String order){Connection conn = DB.creatConn();String sql = "select * from t_importdata where 1=1";if(StringUtils.isNotBlank(sort)){sql+="order by"+sort;}if(StringUtils.isNotBlank(order)){sql+=" "+order;}sql+=" limit "+(currentPage-1)*pageSize+","+pageSize; //这里的limit前边一定记得加空格哦PreparedStatement ps = DB.prepare(conn,sql);List<ImportData> importDatas = new ArrayList<ImportData>();try {ResultSet rs = ps.executeQuery();ImportData i = null;while(rs.next()){i = new ImportData();i.setImportid(rs.getString("importid"));i.setImportDataType(rs.getString("importdatatype"));i.setImportDate(rs.getString("importdate"));i.setImportStatus(rs.getString("importstatus"));i.setHandleDate(rs.getString("handledate"));i.setHandleStatus(rs.getString("handlestatus"));importDatas.add(i);}} catch (SQLException e) {e.printStackTrace();}finally{DB.close(conn);DB.close(ps);}return importDatas;}//保存操作，参数是ImportData对象public void saveImportData(ImportData i){Connection conn= DB.creatConn();String sql ="insert into t_importdata(importid,importdatatype,importdate,importstatus,handledate,handlestatus)" +"values(?,?,?,?,?,?)";PreparedStatement ps = DB.prepare(conn,sql);try {ps.setString(1, i.getImportid());ps.setString(2, i.getImportDataType());ps.setString(3, i.getImportDate());ps.setString(4, i.getImportStatus());ps.setString(5, i.getHandleDate());ps.setString(6, i.getHandleStatus());ps.executeUpdate();} catch (SQLException e) {e.printStackTrace();} finally {DB.close(conn);DB.close(ps);}}//保存操作public void saveImportDataDetail(ImportDataDetail i){Connection conn = DB.creatConn();String sql = "insert into t_importdatadetail(importid,cgbz,hcode,msg,col0,col1,col2,col3,col4,col5,col6,col7,col8,col9,col10) " +"values(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";PreparedStatement ps = DB.prepare(conn, sql);try {ps.setString(1, i.getImportid());ps.setString(2, i.getCgbz());ps.setString(3, i.getHcode());ps.setString(4, i.getMsg());ps.setString(5, i.getCol0());ps.setString(6, i.getCol1());ps.setString(7, i.getCol2());ps.setString(8, i.getCol3());ps.setString(9, i.getCol4());ps.setString(10, i.getCol5());ps.setString(11, i.getCol6());ps.setString(12, i.getCol7());ps.setString(13, i.getCol8());ps.setString(14, i.getCol9());ps.setString(15, i.getCol10());ps.executeUpdate();} catch (SQLException e) {e.printStackTrace();} finally {DB.close(conn);DB.close(ps);}}//根据id查询导入数据信息public List<ImportDataDetail> getImportDataDetailsByMainId(String importDataId) {Connection conn = DB.creatConn();String sql = "select * from t_importdatadetail where importid = '" + importDataId + "'";PreparedStatement ps = DB.prepare(conn, sql);List<ImportDataDetail> importDataDetails = new ArrayList<ImportDataDetail>();try {ResultSet rs = ps.executeQuery();ImportDataDetail i = null;while(rs.next()) {i = new ImportDataDetail();i.setImportDetailId(rs.getInt("importdetailid"));i.setImportid(rs.getString("importid"));i.setCgbz("1".equals(rs.getString("cgbz"))?"已处理":"未处理");i.setHcode(rs.getString("hcode"));i.setMsg(rs.getString("msg"));i.setCol0(rs.getString("col0"));i.setCol1(rs.getString("col1"));i.setCol2(rs.getString("col2"));i.setCol3(rs.getString("col3"));i.setCol4(rs.getString("col4"));i.setCol5(rs.getString("col5"));i.setCol6(rs.getString("col6"));i.setCol7(rs.getString("col7"));i.setCol8(rs.getString("col8"));i.setCol9(rs.getString("col9"));i.setCol10(rs.getString("col10"));importDataDetails.add(i);}} catch (SQLException e) {e.printStackTrace();}DB.close(ps);DB.close(conn);return importDataDetails;}//保存学生信息public void saveStudents(String importId) {Connection conn = DB.creatConn();String id = Long.toString(System.currentTimeMillis());String sql = "insert into t_student(stunum,stuname,stuage,stusex,stubirthday,stuhobby) " +"select col0,col1,col2,col3,col4,col5 from t_importdatadetail " +" where importid = '" + importId + "'";PreparedStatement ps = DB.prepare(conn, sql);try {ps.executeUpdate();} catch (SQLException e) {e.printStackTrace();}DB.close(ps);DB.close(conn);}public void updImportDataStatus(String handleDate,String importId) {Connection conn = DB.creatConn();String id = Long.toString(System.currentTimeMillis());String sql = "update t_importdata set handledate =?,handlestatus='1' where importid = ?";PreparedStatement ps = DB.prepare(conn, sql);try {ps.setString(1,handleDate);ps.setString(2,importId);ps.executeUpdate();} catch (SQLException e) {e.printStackTrace();}DB.close(ps);DB.close(conn);}public void updImportDataDetailStatus(String importId) {Connection conn = DB.creatConn();String id = Long.toString(System.currentTimeMillis());String sql = "update t_importdatadetail set cgbz ='1',hcode='',msg='导入数据成功!' where importid = ?";PreparedStatement ps = DB.prepare(conn, sql);try {ps.setString(1,importId);ps.executeUpdate();} catch (SQLException e) {e.printStackTrace();}DB.close(ps);DB.close(conn);}public void del(String importids){Connection conn = DB.creatConn();String sql="delete from t_importdata where importid=?";PreparedStatement ps = DB.prepare(conn, sql);try {ps.setString(1,importids);ps.executeUpdate();} catch (SQLException e) {e.printStackTrace();}DB.close(ps);DB.close(conn);}}实现下载的action:package com.huangteng.demo.action;import com.opensymphony.xwork2.ActionSupport;import org.apache.commons.io.FileUtils;import org.apache.commons.lang3.StringUtils;import org.apache.poi.hssf.usermodel.*;import org.apache.poi.ss.util.CellRangeAddress;import org.apache.poi.ss.util.CellRangeAddressList;import org.apache.struts2.ServletActionContext;import org.jdom.Attribute;import org.jdom.Document;import org.jdom.Element;import org.jdom.input.SAXBuilder;import java.io.*;import java.net.URLEncoder;import java.util.List;/*** Created by ht on 2016/8/9.*/public class FileDownloadAction extends ActionSupport {private String templateId;private String templateName;public String getTemplateId() {return templateId;}public void setTemplateId(String templateId) {this.templateId = templateId;}public String getTemplateName() {return templateName;}public void setTemplateName(String templateName) {this.templateName = templateName;}@Overridepublic String execute() throws Exception {return SUCCESS;}/*** 获取输入流* @return* @throws IOException*/public InputStream getInputStream() throws IOException {//创建模板createTemplate();String path = ServletActionContext.getServletContext().getRealPath("/template");String filepath = path +"\\" + templateName + ".xls";File file = new File(filepath);return FileUtils.openInputStream(file);}/*** 获取文件名*/public String getDownloadFileName(){String downloadFileName = "";String filename = templateName + ".xls";try {downloadFileName = URLEncoder.encode(filename,"UTF-8");} catch (UnsupportedEncodingException e) {e.printStackTrace();}return downloadFileName;}/*** 创建模板*/private void createTemplate() {String path = ServletActionContext.getServletContext().getRealPath("/template");File file = new File(path,templateId+".xml");SAXBuilder builder = new SAXBuilder();try{//获取根元素Document parse = builder.build(file);Element root = parse.getRootElement();//POI登场HSSFWorkbook wb = new HSSFWorkbook();HSSFSheet sheet = wb.createSheet("Sheet0");//获取名字templateName = root.getAttribute("name").getValue();int rownum = 0;int column = 0;//1 一个一个来解析，第一个是studen.xml中的colgroupElement colgroup = root.getChild("colgroup");setColumnWidth(sheet,colgroup);//2 第二个是studen.xml中的titleElement title = root.getChild("title");List<Element> trs = title.getChildren("tr");for(int i=0;i<trs.size();i++){Element tr = trs.get(i);List<Element> tds = tr.getChildren("td");HSSFRow row = sheet.createRow(rownum);HSSFCellStyle cellStyle = wb.createCellStyle();cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);for(column=0;column<tds.size();column++){Element td = tds.get(column);HSSFCell cell = row.createCell(column);//获取标签属性Attribute rowSpan = td.getAttribute("rowspan");Attribute colSpan = td.getAttribute("colspan");Attribute value = td.getAttribute("value");if(value!=null){String val = value.getValue();cell.setCellValue(val);int rspan = rowSpan.getIntValue() - 1;int cspan = colSpan.getIntValue() -1;//设置字体HSSFFont font = wb.createFont();font.setFontName("宋体");font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);font.setFontHeightInPoints((short)12);cellStyle.setFont(font);cell.setCellStyle(cellStyle);//合并单元格sheet.addMergedRegion(new CellRangeAddress(rspan, rspan, 0, cspan));}}rownum++;}//3 thead部分的解析Element thead = root.getChild("thead");trs = thead.getChildren("tr");for (int i = 0; i < trs.size(); i++) {Element tr = trs.get(i);HSSFRow row = sheet.createRow(rownum);List<Element> ths = tr.getChildren("th");for(column = 0;column < ths.size();column++){Element th = ths.get(column);Attribute valueAttr = th.getAttribute("value");HSSFCell cell = row.createCell(column);if(valueAttr != null){String value =valueAttr.getValue();cell.setCellValue(value);}}rownum++;}//4 tboby部分Element tbody = root.getChild("tbody");Element tr = tbody.getChild("tr");int repeat = tr.getAttribute("repeat").getIntValue();List<Element> tds = tr.getChildren("td");for (int i = 0; i < repeat; i++) {HSSFRow row = sheet.createRow(rownum);for(column =0 ;column < tds.size();column++){Element td = tds.get(column);HSSFCell cell = row.createCell(column);setType(wb,cell,td);}rownum++;}//输出Excel模板File tempFile = new File(path, templateName + ".xls");tempFile.delete();tempFile.createNewFile();FileOutputStream stream = FileUtils.openOutputStream(tempFile);wb.write(stream);stream.close();}catch (Exception e){e.printStackTrace();}}/*** 处理column组* 设置宽度，算法来于百度* @param sheet* @param colgroup*/private static void setColumnWidth(HSSFSheet sheet,Element colgroup){List<Element> cols= colgroup.getChildren("col");for(int i=0;i<cols.size();i++){Element col = cols.get(i);//获取属性Attribute width = col.getAttribute("width");String unit = width.getValue().replaceAll("[0-9,\\.]", "");//取出单位String value = width.getValue().replaceAll(unit, "");//取出数字int v=0;if(StringUtils.isBlank(unit) || "px".endsWith(unit)){v = Math.round(Float.parseFloat(value) * 37F);}else if ("em".endsWith(unit)){v = Math.round(Float.parseFloat(value) * 267.5F);}sheet.setColumnWidth(i, v);}}/*** 格式设置* @param wb* @param cell* @param td*/private static void setType(HSSFWorkbook wb, HSSFCell cell, Element td){//获取typeAttribute typeAttr = td.getAttribute("type");String type = typeAttr.getValue();//样式HSSFDataFormat format = wb.createDataFormat();HSSFCellStyle cellStyle = wb.createCellStyle();//判断type类型if("NUMERIC".equalsIgnoreCase(type)){cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);Attribute formatAttr = td.getAttribute("format");String formatValue = formatAttr.getValue();formatValue = StringUtils.isNotBlank(formatValue)? formatValue : "#,##0.00";cellStyle.setDataFormat(format.getFormat(formatValue));}else if("STRING".equalsIgnoreCase(type)){cell.setCellValue("");cell.setCellType(HSSFCell.CELL_TYPE_STRING);cellStyle.setDataFormat(format.getFormat("@"));}else if("DATE".equalsIgnoreCase(type)){cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);cellStyle.setDataFormat(format.getFormat("yyyy-m-d"));}else if("ENUM".equalsIgnoreCase(type)){//四个参数是起始行、列，终止行、列CellRangeAddressList regions = new CellRangeAddressList(cell.getRowIndex(), cell.getRowIndex(),cell.getColumnIndex(), cell.getColumnIndex());Attribute enumAttr = td.getAttribute("format");String enumValue = enumAttr.getValue();//生成下拉菜单DVConstraint constraint = DVConstraint.createExplicitListConstraint(enumValue.split(","));HSSFDataValidation dataValidation = new HSSFDataValidation(regions, constraint);wb.getSheetAt(0).addValidationData(dataValidation);}cell.setCellStyle(cellStyle);}}前面的章节讲学生信息导出来为Excel文件的时候，少说了一个写的工具类，不然大家看了会疑惑package com.huangteng.demo.utils;import org.apache.poi.hssf.usermodel.HSSFRow;import org.apache.poi.hssf.usermodel.HSSFSheet;import java.lang.reflect.Method;import java.util.List;/*** Created by ht on 2016/8/8.* 导出为Excel文件的工具类*/public class ExportUtils {//导出headerpublic static void outputHeaders(String[] headersInfo, HSSFSheet sheet){HSSFRow row = sheet.createRow(0);for(int i =0;i<headersInfo.length;i++){sheet.setColumnWidth(i,4000);//设置列宽样式row.createCell(i).setCellValue(headersInfo[i]);}}//导出主体内容public static void outputColumns(String[] headersInfo, List columnsInfo,HSSFSheet sheet,int rowIndex ){HSSFRow row ;//循环导出数据for (int i = 0; i < columnsInfo.size(); i++) {row = sheet.createRow(rowIndex+i);Object obj = columnsInfo.get(i);//每一列for (int j = 0; j < headersInfo.length; j++) {Object value = getFieldValueByName(headersInfo[j],obj);row.createCell(j).setCellValue(value.toString());}}}/*** 利用反射，通过get/set方法来获取每一column对应的值* @param fieldName* @param obj* @return*/private static Object getFieldValueByName(String fieldName, Object obj) {String firstLetter = fieldName.substring(0,1).toUpperCase();String getter = "get" +firstLetter + fieldName.substring(1);//拼接get方法的名称try {Method method = obj.getClass().getMethod(getter, new Class[]{});Object value = method.invoke(obj, new Object[]{});return value;} catch (Exception e) {e.printStackTrace();System.out.println("反射异常");return null;}}}现在的struts2配置文件是：<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN""http://struts.apache.org/dtds/struts-2.3.dtd"><struts><package name="default" namespace="/" extends="struts-default"><!--学生信息--><action name="student-*" class="com.huangteng.demo.action.StudentAction" method="{1}"><result>/jsp/studentList.jsp</result></action><!--数据导入--><action name="importdata-*" class="com.huangteng.demo.action.importDataAction" method="{1}"><result>/jsp/importList.jsp</result></action><!--主界面--><action name="main" class="com.huangteng.demo.action.MainAction"><result>/jsp/layout.jsp</result></action><!--下载--><action name="download" class="com.huangteng.demo.action.FileDownloadAction"><result name="success" type="stream"><param name="bufferSize">8192</param><param name="contentType">application/octet-stream</param><param name="inputName">inputStream</param><param name="contentDisposition">attachment;filename="${downloadFileName}</param></result></action></package></struts>后边的代码实在是太多，一个一个总结的话时间太紧了。只能这样一股脑丢出来了，抱歉。
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