在Springmvc中导出报表下载Excel文件

controller层

@Controllerpublic class UseCaseController{    @Autowired    private UseCaseService useCaseService;/***进入到useCase_excel页面*/    @RequestMapping(value="useCase_excel.xhtml",method="RequestMethod.GET")    public ModelAndView download(){    ModelAndView model = new ModelAndView("useCase_excel");    }/***实现下载导出excel功能*/@RequestMapping(value="useCase_excel_download",method="RequestMethod.GET")    publice String download(HttpServletRequest request,HttpServletResponse response,String requirementId,String status,String stage){    String fileName="测试案例报表";    List<UseCase> useCases = useCaseService.createData(requirement,status,stage);    List<Map<String,Object>> list =createExcelRecord(useCases);    //列名    String columnNames[]={"测试案例编号","需求编号","测试案例负责人","测试人","功能描述","完成率","状态","阶段","计划执行日期","更新日期","建立日期","备注"};    //Map中的key     String keys[]={"useCaseId","requirementId","useCaseOwner","useCaseTester","functionDesc","percent","status","stage","startTimeDesc","updateTimeDesc","createTimeDesc","remark"};     ByteArrayOutputStream os = new ByteArrayOutputStream();     try{         UseCaseExcelUtil.createWorkBook(list,keys,columnNames).write(os);     }catch(IOException e){         e.printStackTrace();      }      byte content = os.toByteArray();      InputStream is = new ByteArrayInputStream(content);      response.reset();      response.setContentType("application/vnd.ms-excel;charset=utf-8");        response.setHeader("Content-Disposition", "attachment;filename="+ new String((fileName + ".xls").getBytes(), "iso-8859-1"));        ServletOutputStream out = response.getOutputStream();        BufferedInputStream bis = null;        BufferedOutputStream bos = null;        try{        bis = new BufferedInputStream(is);        bos = new BufferesOutputStream(out);        byte[] buff = new byte[2048];        int bytesRead;        while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {                bos.write(buff, 0, bytesRead);            }     }catch (final IOException e) {            throw e; } finally {            if (bis != null)                bis.close();            if (bos != null)                bos.close();        }        return null;    }     private List<Map<String, Object>> createExcelRecord(List<UseCase> useCases) {        List<Map<String, Object>> listmap = new ArrayList<Map<String, Object>>();        Map<String, Object> map = new HashMap<String, Object>();        map.put("sheetName", "sheet1");        listmap.add(map);        UseCase useCase=null;        for (int j = 0; j < useCases.size(); j++) {            useCase=useCases.get(j);            Map<String, Object> mapValue = new HashMap<String, Object>();            mapValue.put("useCaseId", useCase.getUseCaseId());            mapValue.put("requirementId", useCase.getRequirementId());            mapValue.put("useCaseOwner", useCase.getUseCaseOwner());            mapValue.put("useCaseTester", useCase.getUseCaseTester());            mapValue.put("functionDesc", useCase.getfunctionDesc());            mapValue.put("percent", useCase.getPercent());            mapValue.put("status", useCase.getStatus());            mapValue.put("stage", useCase.getStage());            mapValue.put("startTimeDesc", useCase.getStartTimeDesc());            mapValue.put("updateTimeDesc", useCase.getUpdateTimeDesc());            mapValue.put("createTimeDesc", useCase.getCreateTimeDesc());            mapValue.put("remark", useCase.getRemark());            listmap.add(mapValue);        }        return listmap;    }}

Service层

@Servicepublic class UseCaseService{    @Autowired    public UseCaseDao useCaseDao;    public List<UseCase> createData(String requirementId,String status,String stage) {        Map<String, Object> params = new HashMap<String, Object>();        if (StringUtils.isNotEmpty(requirementId))        {            params.put("requirementId", requirementId);        }        if (StringUtils.isNotEmpty(status))        {            params.put("status", status);        }        if (StringUtils.isNotEmpty(stage))        {            params.put("stage", stage);        }        List<UseCase> useCaseList = useCaseDao.selectUseCase(params);        return useCaseList;    }}

Dao层

@Repositorypublic class UseCaseDao{    @Autowired    private SqlSession sqlSession;    public List<UseCase> selectUseCase(Map<String, Object> parameter)    {        return  this.sqlSession.selectList("selectUseCase", parameter);    }}

Mapper.Xml

<select id="selectUseCase" resultMap="BaseResultMap"        parameterType="java.util.Map">select<include refid="Base_Column_List" />from USE_CASEwhere DEL_FLAG != 1<if test="requirementId !=null">and REQUIREMENT_ID like #{requirementId}</if><if test="status !=null">and STATUS like #{status} </if><if test="stage != null">and STAGE like #{stage}</if>

Excel工具

public class UseCaseExcelUtil{    public static Workbook createWorkBook(List<Map<String, Object>> list,String []keys,String columnNames[]) {        // 创建excel工作簿        Workbook wb = new HSSFWorkbook();        // 创建第一个sheet（页），并命名        Sheet sheet = wb.createSheet(list.get(0).get("sheetName").toString());        // 手动设置列宽。第一个参数表示要为第几列设；，第二个参数表示列的宽度，n为列高的像素数。        for(int i=0;i<keys.length;i++){            sheet.setColumnWidth((short) i, (short) (35.7 * 150));        }        // 创建第一行        Row row = sheet.createRow((short) 0);        // 创建两种单元格格式        CellStyle cs = wb.createCellStyle();        CellStyle cs2 = wb.createCellStyle();        // 创建两种字体        Font f = wb.createFont();        Font f2 = wb.createFont();        // 创建第一种字体样式（用于列名）        f.setFontHeightInPoints((short) 10);        f.setColor(IndexedColors.BLACK.getIndex());        f.setBoldweight(Font.BOLDWEIGHT_BOLD);        // 创建第二种字体样式（用于值）        f2.setFontHeightInPoints((short) 10);        f2.setColor(IndexedColors.BLACK.getIndex());//        Font f3=wb.createFont();//        f3.setFontHeightInPoints((short) 10);//        f3.setColor(IndexedColors.RED.getIndex());        // 设置第一种单元格的样式（用于列名）        cs.setFont(f);        cs.setBorderLeft(CellStyle.BORDER_THIN);        cs.setBorderRight(CellStyle.BORDER_THIN);        cs.setBorderTop(CellStyle.BORDER_THIN);        cs.setBorderBottom(CellStyle.BORDER_THIN);        cs.setAlignment(CellStyle.ALIGN_CENTER);        // 设置第二种单元格的样式（用于值）        cs2.setFont(f2);        cs2.setBorderLeft(CellStyle.BORDER_THIN);        cs2.setBorderRight(CellStyle.BORDER_THIN);        cs2.setBorderTop(CellStyle.BORDER_THIN);        cs2.setBorderBottom(CellStyle.BORDER_THIN);        cs2.setAlignment(CellStyle.ALIGN_CENTER);        //设置列名        for(int i=0;i<columnNames.length;i++){            Cell cell = row.createCell(i);            cell.setCellValue(columnNames[i]);            cell.setCellStyle(cs);        }        //设置每行每列的值        for (short i = 1; i < list.size(); i++) {            // Row 行,Cell 方格 , Row 和 Cell 都是从0开始计数的            // 创建一行，在页sheet上            Row row1 = sheet.createRow((short) i);            // 在row行上创建一个方格            for(short j=0;j<keys.length;j++){                Cell cell = row1.createCell(j);                cell.setCellValue(list.get(i).get(keys[j]) == null?" ": list.get(i).get(keys[j]).toString());                cell.setCellStyle(cs2);            }        }        return wb;    }}

jsp页面

<%@ page language="java" contentType="text/html; charset=utf-8"    pageEncoding="utf-8"%><%@ taglib uri="http://java.sun.com/jstl/core_rt" prefix="c"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><jsp:include page="/html/includes.html" flush="true" /><!DOCTYPE html><html><head>    <meta charset="UTF-8">    <title>Basic Form - jQuery EasyUI Demo</title>    <link rel="stylesheet" type="text/css" href="../../themes/default/easyui.css">    <link rel="stylesheet" type="text/css" href="../../themes/icon.css">    <link rel="stylesheet" type="text/css" href="../demo.css">    <script type="text/javascript" src="../../jquery.min.js"></script>    <script type="text/javascript" src="../../jquery.easyui.min.js"></script></head><body>    <!-- <h2>Basic Form</h2>    <p>Fill the form and submit it.</p> -->    <div style="margin:20px 0;"></div>    <div class="easyui-panel" title="生成报表" style="width:400px">        <div style="padding:10px 60px 20px 60px">        <form id="create" method="post">            <table cellpadding="5">                <tr>                    <td>需求编号： </td>            <td><select id="requirementId" name="requirementId" class="easyui-combobox" panelHeight="auto" style="width:150px">                        <option value="">请选择</option>                       <c:forEach items="${crfList}" var="crfItem">                            <option value="${crfItem.requirementId}">${crfItem.requirementId}</option>                        </c:forEach>                     </select>            </td>                </tr>                <tr>                    <td>阶段:</td>                    <td>                        <select class="easyui-combobox" id="stage">                        <option value="">请选择</option>                        <option value="dev">dev</option>                        <option value="sit">sit</option>                        <option value="uat">uat</option>                        <option value="prd">prd</option>                        </select>                    </td>                </tr>                <tr>                    <td>状态:</td>                    <td>                        <select class="easyui-combobox" id="status">                        <<option value="">请选择</option>                        <option value="Unexecute">未执行</option>                        <option value="Pass">通过</option>                        <option value="Refused">不通过</option>                    </td>                </tr>                       </table>        </form>        <div style="text-align:center;padding:5px">            <a id="print" href="javascript:void(0)" class="easyui-linkbutton" onclick="submitForm()">生成报表</a>           </div>    </div>    </body><script type="text/javascript">    //初始化    $(document).ready(function() {        $("#print").click(function() {                var requirementId = $("#requirementId").combobox('getValue');                var status = $("#status").combobox('getValue');                var stage = $("#stage").combobox('getValue');                var useCaseTester = $("#useCaseTester").val();                window.location.href = "useCase_excel_download.xhtml?requirementId="+ requirementId + "&status=" + status+"&stage="+stage+"&useCaseTester"+useCaseTester;            });    });</script></html>

---