在Springmvc中导出报表下载Excel文件

@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
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;
}

}

@Repository
public class UseCaseDao
{
@Autowired
private SqlSession sqlSession;

public List<UseCase> selectUseCase(Map<String, Object> parameter)
{
return  this.sqlSession.selectList("selectUseCase", parameter);
}
}

<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>

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;
}
}

<%@ 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>