在Springmvc中导出报表下载Excel文件

controller层

@Controller
public 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

@Service
public 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

@Repository
public 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_CASE
where 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>

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