1.引入maven 依赖
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<dependency> <groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>${poi.version}</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>${poi.version}</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>${poi.version}</version>
</dependency>
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2.工具类
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public class ExcelUtils {
/**
* @param response
* @param fileName excel文件名
* @param headMap 表头map
* @param dataList 表格数据
*/
public static void exportXlsx(HttpServletResponse response, String fileName,
Map<String, String> headMap, List<Map<String, Object>> dataList) {
Workbook workbook = exportXlsx(fileName, headMap, dataList);
response.setContentType("application/binary;charset=ISO8859_1");
OutputStream outputStream = null;
try {
outputStream = response.getOutputStream();
String fn = new String(fileName.getBytes(), "ISO8859_1");
response.setHeader("Content-disposition", "attachment; filename=" + fn + ".xlsx");
workbook.write(outputStream);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* 导出数据
*
* @param headMap
* @param dataList
*/
public static Workbook exportXlsx(String sheetName, Map<String, String> headMap, List<Map<String, Object>> dataList) {
Workbook workbook = new XSSFWorkbook();
Sheet sheet = workbook.createSheet(sheetName);
int rowIndex = 0, columnIndex = 0;
Set<String> keys = headMap.keySet();
//表头
Row row = sheet.createRow(rowIndex++);
for (String key : keys) {
Cell cell = row.createCell(columnIndex++);
cell.setCellValue(headMap.get(key));
}
//内容
if (dataList != null && !dataList.isEmpty()) {
for (Map<String, Object> map : dataList) {
row = sheet.createRow(rowIndex++);
columnIndex = 0;
for (String key : keys) {
Cell cell = row.createCell(columnIndex++);
setCellValue(cell, map.get(key));
}
}
}
return workbook;
}
private static void setCellValue(Cell cell, Object obj) {
if (obj == null) {
return;
}
if (obj instanceof String) {
cell.setCellValue((String) obj);
} else if (obj instanceof Date) {
Date date = (Date) obj;
if (date != null) {
cell.setCellValue(DateUtils.dfDateTime.format(date));
}
} else if (obj instanceof Calendar) {
Calendar calendar = (Calendar) obj;
if (calendar != null) {
cell.setCellValue(DateUtils.dfDateTime.format(calendar.getTime()));
}
} else if (obj instanceof Timestamp) {
Timestamp timestamp = (Timestamp) obj;
if (timestamp != null) {
cell.setCellValue(DateUtils.dfDateTime.format(new Date(timestamp.getTime())));
}
} else if (obj instanceof Double) {
cell.setCellValue((Double) obj);
} else {
cell.setCellValue(obj.toString());
}
}
} |
3.controller导出用户数据
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@RequestMapping("/export")
public String export(String username, HttpServletRequest request, HttpServletResponse repsonse) {
//查询用户数据
UserQueryDTO queryDTO = new UserQueryDTO() {{
setUsername(username);
}};
List<CmsUser> userList = userService.findUser(queryDTO);
//表头
Map<String, String> headNameMap = new LinkedHashMap<String, String>();
headNameMap.put("userId", "ID");
headNameMap.put("roleName", "角色");
headNameMap.put("userName", "账号");
headNameMap.put("realName", "姓名");
headNameMap.put("mobile", "电话号码");
headNameMap.put("createDate", "创建时间");
headNameMap.put("status", "状态");
//表格数据
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
if (userList != null && userList.size() > 0) {
for (CmsUser user : userList) {
String statusName = "正常";
if (StringUtils.isNotBlank(user.getDeleteFlag()) && user.getDeleteFlag().equals(ConstantHelper.DELETE_FLAG_DELETED)) {
statusName = "删除";
}
String createDate = "";
if (user.getCreateDate() != null) {
createDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(user.getCreateDate());
}
String roleName = "";
Set<CmsRole> roleSet = roleService.findByUserId(user.getUserId());
if (roleSet != null && roleSet.size() > 0) {
for (CmsRole r : roleSet) {
roleName += r.getName() + " ";
}
}
Map<String, Object> map = new HashMap<String, Object>();
map.put("userId", user.getUserId());
map.put("roleName", roleName);
map.put("userName", user.getUsername());
map.put("realName", user.getRealName());
map.put("mobile", user.getMobile());
map.put("createDate", createDate);
map.put("status", statusName);
list.add(map);
}
}
ExcelUtils.exportXlsx(repsonse, "用户", headNameMap, list);
return null;
}
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本文转自 陈敬（Cathy） 博客园博客，原文链接：http://www.cnblogs.com/janes/p/7596637.html，如需转载请自行联系原作者