SpringMVC 导入Excel

1. 添加依赖

<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.5-FINAL</version>
</dependency>

2. Ajax 实现上传的excel的功能

function upload() {
var uploadResult = document.getElementById("upload-result");
uploadResult.style.color = "green";
uploadResult.innerHTML = "正在上传.....";
var formData = new FormData($("uploadForm")[0]);
formData.append('Content-Type', 'multipart/form-data');
formData.append('image', $('input[type=file]')[0].files[0]);
$.ajax({
url : "${pageContext.request.contextPath}/api/v1/file",
type : 'POST',
data : formData,
dataType : 'json',
contentType : false,
processData : false,
cache : false,//防止缓存
error : function(data) {
alert("请求失败，网络异常")
console.log(data);
},
success : function(data) {
console.log(data);
var code = data.status;
if (code == 200) {
uploadResult.style.color = "green";
uploadResult.innerHTML = "上传成功";
imgUrl = data.id;
} else {
uploadResult.style.color = "red";
uploadResult.innerHTML = "上传失败";
}
}

});
}

3. SpringMVC controller 进行文件的处理

public static List<BaseBean> getExcelDataFromReqeust(HttpServletRequest request,BaseBean baseBean) {
List<BaseBean> resultList = new ArrayList<>();
List<Map<String, Object>> result = null;
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(
request.getSession().getServletContext());
// 先判断request中是否包涵multipart类型的数据，
if (multipartResolver.isMultipart(request)) {
// 再将request中的数据转化成multipart类型的数据
MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
Iterator<String> iter = multiRequest.getFileNames();
while (iter.hasNext()) {
MultipartFile file = multiRequest.getFile((String) iter.next());
if (file != null) {
try {
result = ExcelImportUtil.parseExcel(file.getInputStream());
for (Map<String, Object> map : result) {
BaseBean newBean = (BaseBean) baseBean.clone();
transMap2Bean2(map,newBean);
resultList.add(newBean);
}
} catch (IllegalStateException | IOException e) {
e.printStackTrace();
}
}
}
return resultList;
} else {
return resultList;
}
}

public static void transMap2Bean2(Map<String, Object> map, Object obj) {
if (map == null || obj == null) {
return;
}
try {
BeanUtils.populate(obj, map);
} catch (Exception e) {
System.out.println("transMap2Bean2 Error " + e);
}
}

3.1 工具类解析excel 数据

public static List<Map<String, Object>> parseExcel(InputStream fis) {
List<Map<String, Object>> data = new ArrayList<Map<String, Object>>();;
try {
HSSFWorkbook book = new HSSFWorkbook(fis);
HSSFSheet sheet = book.getSheetAt(0);
int firstRow = sheet.getFirstRowNum();
int lastRow = sheet.getLastRowNum();
//除去表头和第一行
for(int i = firstRow + 1; i<lastRow+1; i++) {
Map<String, Object> map = new HashMap<String, Object>();

HSSFRow row = sheet.getRow(i);
int firstCell = row.getFirstCellNum();
int lastCell = row.getLastCellNum();

for(int j=firstCell; j<lastCell; j++) {
HSSFCell cellTitle = sheet.getRow(firstRow).getCell(j);
String key = cellTitle.getStringCellValue();

HSSFCell cell = row.getCell(j);
Object value = null;
if(cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
value = (int)cell.getNumericCellValue();
}
if(cell.getCellType() == HSSFCell.CELL_TYPE_STRING) {
value = cell.getStringCellValue();
}
map.put(key, value);
}
data.add(map);
}
} catch (IOException e) {
e.printStackTrace();
}
return data;
}

4. 调用的方法

@RequestMapping(value = "/excel", method = RequestMethod.POST)
@ResponseBody
public Object uploadFile(HttpServletRequest request) {
List<BaseBean> result = ExcelImportUtil.getExcelDataFromReqeust(request,new VaccineItem());
for (BaseBean object : result) {
VaccineItem vaccineItem = (VaccineItem) object;
System.out.println(vaccineItem.toString());
}
return StatusConfig.OK;
}