一. 导出excel，具体代码如下：
public ResponseEntity<byte[]> listExcel(@RequestBody JSONObject param) throws Exception {
List<Bean> list = userService.queryList(params);
String[] titles = {"系统序号", "客户名称", "金额", "明细", "审核状态", "创建时间"};
ByteArrayOutputStream out = new ByteArrayOutputStream();
// 操作具体的数据
Workbook wb = userService.exportSalesScore(titles, out, list);
HttpHeaders headers = new HttpHeaders();
headers.setContentDispositionFormData("attachment", "充值明细导出.xls");
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
wb.write(out);
return new ResponseEntity<byte[]>(out.toByteArray(), headers, HttpStatus.OK);
}
public Workbook exportSalesScore(String[] titles, ByteArrayOutputStream out, List<Bean> list) throws Exception {
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet hssfSheet = workbook.createSheet("sheet1");
HSSFRow row = hssfSheet.createRow(0);
HSSFCellStyle hssfCellStyle = workbook.createCellStyle();
HSSFCell hssfCell;
for (int i = 0; i < titles.length; i++) {
hssfCell = row.createCell(i);//列索引从0开始
hssfCell.setCellValue(titles[i]);//列名1
hssfCell.setCellStyle(hssfCellStyle);//列居中显示
}
if(CollectionUtils.isNotEmpty(list)) {
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
for (int i = 0; i < list.size(); i++) {
row = hssfSheet.createRow(i + 1);
Bean s = list.get(i);
row.createCell(0).setCellValue(s.getId());
row.createCell(1).setCellValue(s.getUsername());
row.createCell(2).setCellValue(s.getMoney());
row.createCell(3).setCellValue(s.getDetail());
row.createCell(4).setCellValue(s.getAuditString());
row.createCell(5).setCellValue(df.format(s.getCreateTime()));
}
}
try {
workbook.write(out);
out.flush();
out.close();
} catch (Exception e) {
log.info("导出异常：{}", e);
}
return workbook;
}
二. 读取excel，具体代码如下：
ReadExcelUtils excelReader = new ReadExcelUtils("文件在服务器上的路径");
List<Map<Integer, Object>> mapList = excelReader.readExcelContent();
/**
* 读取Excel数据内容
*
* @param
* @return Map 包含单元格数据内容的Map对象
* @author zengwendong
*/
public List<Map<Integer,Object>> readExcelContent() throws Exception{
if(wb==null){
throw new Exception("Workbook对象为空！");
}
List<Map<Integer,Object>> content = new ArrayList<>();
sheet = wb.getSheetAt(0);
// 得到总行数
int rowNum = sheet.getLastRowNum();
row = sheet.getRow(0);
int colNum = row.getPhysicalNumberOfCells();
// 第一行为表头的标题
// 正文内容从第四行开始（当前业务需要，企小保灵工小保人员清单表）
for (int i = 3; i <= rowNum; i++) {
row = sheet.getRow(i);
int j = 1;
Map<Integer,Object> cellValue = new HashMap<>();
while (j < colNum) {
Object obj = getCellFormatValue(row.getCell(j));
cellValue.put(j, obj);
j++;
}
content.add(cellValue);
}
return content;
}
public class ReadExcelUtils {
private Logger logger = LoggerFactory.getLogger(ReadExcelUtils.class);
private Workbook wb;
private Sheet sheet;
private Row row;
public ReadExcelUtils(String filepath) {
if(filepath==null){
return;
}
String ext = filepath.substring(filepath.lastIndexOf("."));
try {
InputStream is = new FileInputStream(filepath);
if(".xls".equals(ext)){
wb = new HSSFWorkbook(is);
}else if(".xlsx".equals(ext)){
wb = new XSSFWorkbook(is);
}else{
wb=null;
}
} catch (FileNotFoundException e) {
logger.error("FileNotFoundException", e);
} catch (IOException e) {
logger.error("IOException", e);
}
}
/**
* 读取Excel表格表头的内容
*
* @param
* @return String 表头内容的数组
* @author zengwendong
*/
public String[] readExcelTitle() throws Exception{
if(wb==null){
throw new Exception("Workbook对象为空！");
}
sheet = wb.getSheetAt(0);
row = sheet.getRow(0);
// 标题总列数
int colNum = row.getPhysicalNumberOfCells();
System.out.println("colNum:" + colNum);
String[] title = new String[colNum];
for (int i = 0; i < colNum; i++) {
title[i] = row.getCell(i).getCellFormula();
}
return title;
}
/**
* 读取Excel数据内容
*
* @param
* @return Map 包含单元格数据内容的Map对象
* @author zengwendong
*/
public List<Map<Integer,Object>> readExcelContent() throws Exception{
if(wb==null){
throw new Exception("Workbook对象为空！");
}
List<Map<Integer,Object>> content = new ArrayList<>();
sheet = wb.getSheetAt(0);
// 得到总行数
int rowNum = sheet.getLastRowNum();
row = sheet.getRow(0);
int colNum = row.getPhysicalNumberOfCells();
// 第一行为表头的标题
// 正文内容从第四行开始（当前业务需要，企小保灵工小保人员清单表）
for (int i = 3; i <= rowNum; i++) {
row = sheet.getRow(i);
int j = 1;
Map<Integer,Object> cellValue = new HashMap<>();
while (j < colNum) {
Object obj = getCellFormatValue(row.getCell(j));
cellValue.put(j, obj);
j++;
}
content.add(cellValue);
}
return content;
}
/**
*
* 根据Cell类型设置数据
*
* @param cell
* @return
* @author zengwendong
*/
private Object getCellFormatValue(Cell cell) {
Object cellvalue = "";
if (cell != null) {
// 判断当前Cell的Type
switch (cell.getCellType()) {
case Cell.CELL_TYPE_NUMERIC:// 如果当前Cell的Type为NUMERIC
case Cell.CELL_TYPE_FORMULA: {
// 判断当前的cell是否为Date
if (org.apache.poi.ss.usermodel.DateUtil.isCellDateFormatted(cell)) {
Date date = cell.getDateCellValue();
cellvalue = date;
} else {// 如果是纯数字
// 取得当前Cell的数值
cellvalue = String.valueOf(cell.getNumericCellValue());
}
break;
}
case Cell.CELL_TYPE_STRING:// 如果当前Cell的Type为STRING
// 取得当前的Cell字符串
cellvalue = cell.getRichStringCellValue().getString();
break;
default:// 默认的Cell值
}
}
return cellvalue;
}
public static void main(String[] args) {
try {
String filepath = "/Users/yinpz/Downloads/企小保灵工小保人员清单表.xls";
ReadExcelUtils excelReader = new ReadExcelUtils(filepath);
List<Map<Integer, Object>> mapList = excelReader.readExcelContent();
JSONArray jsonArray = JSONArray.parseArray(JSON.toJSONString(mapList));
for (Object object : jsonArray) {
JSONObject json = JSON.parseObject(object.toString());
System.out.println(json);
}
// 对读取Excel表格内容测试
System.out.println(JSON.toJSONString(mapList));
} catch (FileNotFoundException e) {
System.out.println("未找到指定路径的文件!");
e.printStackTrace();
}catch (Exception e) {
e.printStackTrace();
}
}
}