利用POI进行Excel的导出

需求：将用户的违约金信息导出为excel表格格式

步骤

1. 数据库中增加按钮的值（注意上级编号要和页面隐藏域中的相等）

DZ内容（页面加载时根据SJBH查询数据库内容，读取DZ字段信息并加载样式及方法）

<a href="javascript:void(0)" class="easyui-linkbutton" data-options="iconCls:'icon-remove'" onclick="getWyj();">违约金查询</a>

页面加载后菜单栏出现“违约金查询”按钮

 2. 创建js方法

sf_wyjcx.js

function getWyj(){
    var userNode = frames['threeModel'].$("#topUserList").datagrid("getSelected");
    if (!userNode) {
        pubAlertMessage({
            "msg" : "请选择用户信息!",
            "type" : BDXC_ALERT_TYPE.INFO
        });
        return;
    }
    var yhbh = userNode.YHBH;

    var postData = {
            'jmjs.yhbh' : yhbh
    };
    var paramJson = {
            "winDivId" :"getWyjWin",
            "title" :"违约金查询",
            "width" :920,//300,        // 790
            "height" :400,        // 520
            "iconCls" :"icon-edit",
            "inDivId" :"getWyj",
            "loadUrl" :"UserPayAction!getWyj.action",
            "postData" :postData,
            "watingTime":100,
            "defineFun":"exportExcel("+yhbh+")",
            "initFunc":""
        };
    //pubLoadWinPage(paramJson);
        pubLoadWyj(paramJson);
}
function pubLoadWyj(paramJson) {
    var watingStartJson = {
            "time" : paramJson.watingTime
        };
        pubWatingStart(watingStartJson);
        $.ajax({
            url : paramJson.loadUrl,
            type : 'post',
            data : paramJson.postData,
            dataType : 'html',
            error : function (e) {
                pubWatingEnd();
                pubAlertMessage({
                    "msg" : "加载页面失败!",
                    "type" : BDXC_ALERT_TYPE.ERROR
                });
            },
            success : function (data) {
                pubWatingEnd();
                var winDiv = $('#' + paramJson.winDivId);
                if (winDiv.length == 0) {
                    $('<div id="' + paramJson.winDivId + '"></div>').appendTo(document.body);
                }
                var canelFun = "pubWinClose('" + paramJson.winDivId + "','');";
                if (paramJson.canelFun) {
                    canelFun = "pubWinClose('" + paramJson.winDivId + "','" + paramJson.canelFun + "');";
                }
                var inDivId = paramJson.inDivId || paramJson.winDivId + 'Content';
                paramJson.inDivId = inDivId;
                paramJson.winHtml = '<div class="easyui-layout" fit="true">' +
                    '<div id="' + paramJson.inDivId + '" region="center" border="false" class="winDataContent">' + data +
                    '</div>';
                if (!paramJson.isNormal) {
                    paramJson.winHtml += '<div region="south" border="false" class="winOpLine" style="float:right">' +
                    '<a id="btnCancel" class="easyui-linkbutton" icon="icon-cancel" href="javascript:' + canelFun + '">关闭</a>' +
                    '<a id="btnEp" class="easyui-linkbutton" icon="icon-ok" href="javascript:' + paramJson.defineFun + '" >导出</a>' +
                    '</div>';
                }
                paramJson.winHtml += '</div>';
                pubInitWindow(paramJson);
            }
        });
}
//导出表格
function exportExcel(yhbh){
    var url = "UserPayAction!getWyjExcel.action?yhbh="+yhbh;
    $.messager.confirm("操作提示","是否导出违约金信息？",function(data){
        if(data){
             location.href = url;
        }
    });
}

3. 点击菜单栏的“违约金查询”首先加载用户所有的违约金信息

 后台方法如下：

UserPayAction.java

    // 查询违约金
    public String getWyj(){
        jmjs.setYhbh(jmjs.getYhbh());
        List list=userPayService.getWyjlist(jmjs);
        jmjs.setList(list);
        return "addwyj";
    }

UserPayDaoImpl.java

public  List getWyjlist(SfJmjsT vo){
            List list =  new ArrayList();
            StringBuilder sql = new StringBuilder();
            List result = null;
            sql.append("select a.*,b.*,c.* from (select cnq,sfmj,dj,ysje,sfje,qfje,decode(sfhjwyj,'否',SF_ZNJ_F_CFD('居民',yhbh,?,cnq),znjys)znj," +
                    "SF_ZNJ_F_TS(yhbh,?,cnq)ts from sf_jmjs_t where zf=0 and qfje>0 and yhbh=? )a," +
                    "(select sum(qfje) zqf,sum(decode(sfhjwyj,'否',SF_ZNJ_F_CFD('居民',yhbh,?,cnq),znjys))zznj from sf_jmjs_t " +
                    "where zf=0 and qfje>0 and yhbh=?)b,(select yhbm,yhkh,yhmc,lxdh,fgs,qy,rlz,xq,dz from sf_jmyh_t where zf=0 and yhbh=?)c");
            Date da=new Date();
             SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
               String dateString = formatter.format(da);
               DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd");  
               Date date=null;
               try {
                date = format1.parse(dateString);
            } catch (ParseException e) {
                e.printStackTrace();
            }  
            list.add(date);
            list.add(date);
            list.add(vo.getYhbh());
            list.add(date);
            list.add(vo.getYhbh());
            list.add(vo.getYhbh());
            try {
                result = this.executeSqlList(sql.toString(), list.toArray(), SfJmjsT.class);
            } catch (BDXCException e) {
                e.printStackTrace();
                logger.error(BDXCUtil.getExceptionString(e));
            }
            return result;
        }

返回的数据在页面进行遍历

sf_wyjcx.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="/struts-tags" prefix="s" %>
<%@ taglib prefix="C" uri="http://java.sun.com/jsp/jstl/core"%>
<script type="text/javascript" src="js/common/validate.js"></script> 
<script type="text/javascript">
</script>
<form id="getWyjForm" method="post" action="">
    <s:token></s:token>
    <div>
        <table>
            <tbody>
            <fieldset class="fieldsetCss" style="95%;">
             <legend class="legendCss" >违约金信息</legend>
                    <table id="getWyj" border="1">
                    <tr>
                        <td  align="center">采暖期</td>
                        <td  align="center">用户编码</td>
                        <td  align="center">用户名称</td>
                        <td  align="center">联系电话</td>
                        <td  align="center">地址</td>
                        <td  align="center">收费面积</td>
                        <td  align="center">单价</td>
                        <td  align="center">应收金额</td>
                        <td  align="center">实收金额</td>
                        <td  align="center">欠费金额</td>
                        <td  align="center">违约金</td>
                        <td  align="center">违约金天数</td>
                    </tr>

　　　　　　　　<!--中间栏对含违约金结算信息进行遍历-->    
                        <s:iterator value="jmjs.list" var="b">
                    <tr>
                    <td class="contentCss" align="center">${b.cnq }</td>
                    <td class="contentCss" align="center">${b.yhbm }</td>
                    <td class="contentCss" align="center">${b.yhmc }</td>
                    <td class="contentCss" align="center">${b.lxdh }</td>
                    <td class="contentCss" align="center">${b.dz }</td>
                    <td class="contentCss" align="center">${b.sfmj }</td>
                    <td class="contentCss" align="center">${b.dj }</td>
                    <td class="contentCss" align="center">${b.ysje }</td>
                    <td class="contentCss" align="center">${b.sfje }</td>
                    <td class="contentCss" align="center">${b.qfje }</td>
                    <td class="contentCss" align="center">${b.znj }</td>
                    <td class="contentCss" align="center">${b.ts }</td>
                    </tr>
                    </s:iterator>


                    <tr>
                        <td class="contentCss" align="center">合计：</td>
                        <td class="contentCss" align="center"></td>
                        <td class="contentCss" align="center"></td>
                        <td class="contentCss" align="center"></td>
                        <td class="contentCss" align="center"></td>
                        <td class="contentCss" align="center"></td>
                        <td class="contentCss" align="center"></td>
                        <td class="contentCss" align="center"></td>
                        <td class="contentCss" align="center"></td>
                        <td class="contentCss" align="center">${b.zqf }</td>
                        <td class="contentCss" align="center">${b.zznj }</td>
                        <td class="contentCss" align="center"></td>
                    </tr>
                    </table>
            </fieldset>
            </tbody>
        </table>
    </div>
</form>

页面显示效果

4. 导出

UserPayAction.java

 /**
    * 导出违约金信息
    */
     public String getWyjExcel(){
         String yhbh = this.getRequest().getParameter("yhbh");
         wyjExcelIs = userPayService.getWyjExcelIs(context,yhbh);
         return "wyjExcel";
     }
     
    /**
     * 违约金导出表格名称*/
    public String getWyjExcelName() {
        String wyjExcelName = null;
        try {
            wyjExcelName = new String("违约金信息.xls".getBytes(),
                    "ISO-8859-1");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
            logger.error(BDXCUtil.getExceptionString(e));
        }
        return wyjExcelName;
    }

    public InputStream getWyjExcelIs() {
        return wyjExcelIs;
    }

    public void setWyjExcelIs(InputStream wyjExcelIs) {
        this.wyjExcelIs = wyjExcelIs;
    }

struts.xml

<result name="wyjExcel" type="stream">
                <param name="contentType">application/vnd.ms-excel</param>
                <param name="inputName">wyjExcelIs</param>
                <param name="contentDisposition">
                    attachment;fileName = "${wyjExcelName}"
                </param>
                <param name="bufferSize">1024</param>
            </result>

UserPayServiceImpl.java

    /**
     * 导出违约金信息
     * 
     * @return 违约金信息文件的输入流
     */
    public InputStream getWyjExcelIs(BDXCPageContext context, String yhbh) {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        try {
            HSSFWorkbook workbook = new HSSFWorkbook();
            //头标题样式
            HSSFCellStyle style1 = workbook.createCellStyle(); // 样式对象      
            style1.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直      
            style1.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平  
            HSSFFont f1 = workbook.createFont(); 
            
            f1.setFontName("宋体");  
            f1.setFontHeightInPoints((short) 20);//字号 
            f1.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//加粗 
            style1.setFont(f1);
            //表头样式
            HSSFCellStyle style2 = workbook.createCellStyle(); // 样式对象      
            style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直      
            style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平  
            style2.setWrapText(true); 
            style2.setBorderBottom((short) 1);//下边框 
            style2.setBorderLeft((short) 1);//左边框 
            style2.setBorderRight((short) 1);//右边框 
            style2.setBorderTop((short) 1);//上边框 
            
            HSSFFont f2 = workbook.createFont(); 
            f2.setFontName("宋体");  
            f2.setFontHeightInPoints((short) 12);//字号 
            f2.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//加粗 
            style2.setFont(f2);
            //表体样式
            HSSFCellStyle style3 = workbook.createCellStyle(); // 样式对象      
            style3.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直      
            style3.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平  
            style3.setWrapText(true); 
            style3.setBorderBottom((short) 1);//下边框 
            style3.setBorderLeft((short) 1);//左边框 
            style3.setBorderRight((short) 1);//右边框 
            style3.setBorderTop((short) 1);//上边框 
            
            HSSFFont f3 = workbook.createFont(); 
            f3.setFontName("宋体");  
            f3.setFontHeightInPoints((short) 10);//字号 
            style3.setFont(f3);
            
            //添加工作表
            HSSFSheet sheet = workbook.createSheet("违约金信息");
            //设置默认行高
            sheet.setDefaultRowHeightInPoints(25); 
            //设置工作表列宽
            for (short j = 0; j < 12; j++) {
                if(j==4){
                    sheet.setColumnWidth(j, (short) (20 * 256));
                }else if(j==11){
                    sheet.setColumnWidth(j, (short) (16 * 256));
                }else{
                    sheet.setColumnWidth(j, (short) (12 * 256));
                }
            }
            //添加表头信息
            List<String> headList = new ArrayList<String>();
            headList.add("采暖期");
            headList.add("用户编码");
            headList.add("用户名称");
            headList.add("联系电话");
            headList.add("地址");
            headList.add("收费面积");
            headList.add("单价");
            headList.add("应收金额");
            headList.add("实收金额");
            headList.add("欠费金额");
            headList.add("违约金");
            headList.add("违约金天数");
            //第一行 头标题
            HSSFRow nRow1 =sheet.createRow(0);
            nRow1.setHeight((short) (30 * 20));
            HSSFCell ncell1 = nRow1.createCell((short) 0);
            ncell1.setCellValue("违约金信息");
            ncell1.setCellStyle(style1); 
            ncell1.setCellType(HSSFCell.CELL_TYPE_STRING);
            sheet.addMergedRegion(new Region(0,(short)0,0,(short)11)); 
            //第二行 表头
            HSSFRow nRow2 =sheet.createRow(1);
            nRow2.setHeight((short) (25 * 20));
            for (short k = 0; k < 12; k++) {

                HSSFCell cell = nRow2.createCell(k);
                cell.setCellType(HSSFCell.CELL_TYPE_STRING);
                cell.setCellStyle(style2); 
                cell.setCellValue(headList.get(k));
            }
            //表体
            SfJmjsT jmjs = new SfJmjsT();
            jmjs.setYhbh(Long.parseLong(yhbh));
            List list=getWyjlist(jmjs);
            for (int i = 2; i < list.size()+2; i++) {
                SfJmjsT js = (SfJmjsT) list.get(i-2);
                HSSFRow Row =sheet.createRow(i);
                Row.setHeight((short) (25 * 20));
                //采暖期
                HSSFCell xcell = Row.createCell((short)0);
                xcell.setCellType(HSSFCell.CELL_TYPE_STRING);
                xcell.setCellStyle(style3); 
                xcell.setCellValue(js.getCnq());
                //用户编码
                HSSFCell xcel2 = Row.createCell((short)1);
                xcel2.setCellType(HSSFCell.CELL_TYPE_STRING);
                xcel2.setCellStyle(style3); 
                xcel2.setCellValue(js.getYhbm());
                //用户名称
                HSSFCell xcel3 = Row.createCell((short)2);
                xcel3.setCellType(HSSFCell.CELL_TYPE_STRING);
                xcel3.setCellStyle(style3); 
                xcel3.setCellValue(js.getYhmc());
                //联系电话
                HSSFCell xcel4 = Row.createCell((short)3);
                xcel4.setCellType(HSSFCell.CELL_TYPE_STRING);
                xcel4.setCellStyle(style3); 
                xcel4.setCellValue(js.getLxdh());
                //地址
                HSSFCell xcel5 = Row.createCell((short)4);
                xcel5.setCellType(HSSFCell.CELL_TYPE_STRING);
                xcel5.setCellStyle(style3); 
                xcel5.setCellValue(js.getDz());
                //收费面积
                HSSFCell xcel6 = Row.createCell((short)5);
                xcel6.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
                xcel6.setCellStyle(style3); 
                xcel6.setCellValue(js.getSfmj());
                //单价
                HSSFCell xcel7 = Row.createCell((short)6);
                xcel7.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
                xcel7.setCellStyle(style3); 
                xcel7.setCellValue(js.getDj());
                //应收金额
                HSSFCell xcel8 = Row.createCell((short)7);
                xcel8.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
                xcel8.setCellStyle(style3); 
                xcel8.setCellValue(js.getYsje());
                //实收金额
                HSSFCell xcel9 = Row.createCell((short)8);
                xcel9.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
                xcel9.setCellStyle(style3); 
                xcel9.setCellValue(js.getSfje());
                //欠费金额
                HSSFCell xcel10 = Row.createCell((short)9);
                xcel10.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
                xcel10.setCellStyle(style3); 
                xcel10.setCellValue(js.getQfje());
                //违约金
                HSSFCell xcel11 = Row.createCell((short)10);
                xcel11.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
                xcel11.setCellStyle(style3); 
                xcel11.setCellValue(js.getZnj());
                //违约金天数
                HSSFCell xcel12 = Row.createCell((short)11);
                xcel12.setCellType(HSSFCell.CELL_TYPE_STRING);
                xcel12.setCellStyle(style3); 
                xcel12.setCellValue(js.getTs());
            }
            //表尾 合计
            SfJmjsT hjJs = (SfJmjsT) list.get(0);
            HSSFRow lastRow =sheet.createRow(list.size()+2);
            lastRow.setHeight((short) (25 * 20));
            //采暖期
            HSSFCell xcell = lastRow.createCell((short)0);
            xcell.setCellType(HSSFCell.CELL_TYPE_STRING);
            xcell.setCellStyle(style2); 
            xcell.setCellValue("合计：");
            //用户编码
            HSSFCell xcel2 = lastRow.createCell((short)1);
            xcel2.setCellType(HSSFCell.CELL_TYPE_STRING);
            xcel2.setCellStyle(style2); 
            xcel2.setCellValue("");
            //用户名称
            HSSFCell xcel3 = lastRow.createCell((short)2);
            xcel3.setCellType(HSSFCell.CELL_TYPE_STRING);
            xcel3.setCellStyle(style2); 
            xcel3.setCellValue("");
            //联系电话
            HSSFCell xcel4 = lastRow.createCell((short)3);
            xcel4.setCellType(HSSFCell.CELL_TYPE_STRING);
            xcel4.setCellStyle(style2);
            xcel4.setCellValue("");
            //地址
            HSSFCell xcel5 = lastRow.createCell((short)4);
            xcel5.setCellType(HSSFCell.CELL_TYPE_STRING);
            xcel5.setCellStyle(style2); 
            xcel5.setCellValue("");
            //收费面积
            HSSFCell xcel6 = lastRow.createCell((short)5);
            xcel6.setCellType(HSSFCell.CELL_TYPE_STRING);
            xcel6.setCellStyle(style2); 
            xcel6.setCellValue("");
            //单价
            HSSFCell xcel7 = lastRow.createCell((short)6);
            xcel7.setCellType(HSSFCell.CELL_TYPE_STRING);
            xcel7.setCellStyle(style2); 
            xcel7.setCellValue("");
            //应收金额
            HSSFCell xcel8 = lastRow.createCell((short)7);
            xcel8.setCellType(HSSFCell.CELL_TYPE_STRING);
            xcel8.setCellStyle(style2); 
            xcel8.setCellValue("");
            //实收金额
            HSSFCell xcel9 = lastRow.createCell((short)8);
            xcel9.setCellType(HSSFCell.CELL_TYPE_STRING);
            xcel9.setCellStyle(style2);
            xcel9.setCellValue("");
            //欠费金额
            HSSFCell xcel10 = lastRow.createCell((short)9);
            xcel10.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
            xcel10.setCellStyle(style2); 
            xcel10.setCellValue(hjJs.getZqf());
            //违约金
            HSSFCell xcel11 = lastRow.createCell((short)10);
            xcel11.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
            xcel11.setCellStyle(style2); 
            xcel11.setCellValue(hjJs.getZznj());
            //违约金天数
            HSSFCell xcel12 = lastRow.createCell((short)11);
            xcel12.setCellType(HSSFCell.CELL_TYPE_STRING);
            xcel12.setCellStyle(style2); 
            xcel12.setCellValue("");
            
            workbook.write(out);   
            out.flush();   
            out.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 
        return new ByteArrayInputStream(out.toByteArray());
    }

效果（有些版本的谷歌浏览器导出时可能不跳出弹窗，直接下载，避免这种情况可以使用火狐浏览器）

excel表格