1.文件导入
- 导入校验
java
public class BoyListener extends AnalysisEventListener {
List<String> names = new ArrayList<>();
/**
* 每解析一行，回调该方法
*
*/
@Override
public void invoke(Object data, AnalysisContext analysisContext) {
//校验名称
String name = ((Boy) data).getName();
if (StringUtils.isBlank(name)){
throw new ServiceException(1,"名称不能为空");
}
if (names.contains(name)){
throw new ServiceException(1,"名称已存在");
}else {
names.add(name);
}
}
/**
* 解析异常回调该方法
* @param exception
* @param context
* @throws Exception
*/
@Override
public void onException(Exception exception, AnalysisContext context) throws Exception {
if (exception instanceof ExcelDataConvertException){
//从0开始
ExcelDataConvertException ex= (ExcelDataConvertException) exception;
//获取行号
int rowIndex = ex.getRowIndex() + 1;
//获取列号
int colIndex = ex.getColumnIndex() + 1;
throw new ServiceException(1,"第"+rowIndex+"行，第"+colIndex+"列数据格式错误");
} else if (exception instanceof RuntimeException) {
throw exception;
}else {
super.onException(exception, context);
}
}
/**
* 解析完回调该方法
* @param analysisContext
*/
@Override
public void doAfterAllAnalysed(AnalysisContext analysisContext) {
names.clear();
}
}- 导入代码
java
@PostMapping("/in")
public void importIn(MultipartFile file) {
try {
InputStream fileInputStream = file.getInputStream();
List<Boy> sheet1 = EasyExcel.read(fileInputStream)
.registerReadListener(new BoyListener())
//导入的实体类型
.head(Boy.class)
.sheet("Sheet1")
//跳过第一行，头行
.headRowNumber(1)
.doReadSync();
if (!CollectionUtils.isEmpty(sheet1)){
for (Boy boy : sheet1) {
System.out.println(JSON.toJSONString(boy));
}
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}2.导出
- 包括导出到本地、响应、文件服务器以及多个sheet导出。
java
@PostMapping("/out")
public void exportOut(HttpServletResponse response) {
try {
ServletOutputStream outputStream = response.getOutputStream();
this.setExcelResponse(response,"测试导出");
//创建一个list用于存放30个Boy对象-适用于单个sheet
// List<Boy> boyList = new java.util.ArrayList<>();
// for (int i = 0; i < 30; i++) {
// Boy boy = new Boy();
// boy.setId(i);
// boy.setName("张三" + i);
// boy.setSalary((double) (i + 1));
// boy.setBirthday(LocalDateTime.now());
// boyList.add(boy);
// }
//写出到服务器
// HashMap<String, Object> paramMap = new HashMap<>();
//文件上传只需将参数中的键指定（默认file），值设为文件对象即可，对于使用者来说，文件上传与普通表单提交并无区别
// paramMap.put("Filedata", FileUtil.file(filePath));
// String result = HttpUtil.post("http://" + url, paramMap);
//写出至本地
// EasyExcel.write("src/main/resources/export.xlsx", Boy.class)
// .sheet("Sheet1")
// .doWrite(boyList);
//写出至浏览器
// EasyExcel.write(outputStream, Boy.class)
// .excelType(ExcelTypeEnum.XLSX)
// .sheet("Sheet1")
// .doWrite(boyList);
//多个sheet导出
ExcelWriter writer = EasyExcel.write(outputStream, Boy.class).excelType(ExcelTypeEnum.XLSX).build();
try {
this.setExcelResponse(response, "多个sheet导出");
//分页查询数据
for(int j=1;j<=5;j++){
List<Boy> boyList = new ArrayList<>();
for (int i = 0; i < 30; i++) {
Boy boy = new Boy();
boy.setId(i);
boy.setName("张三" + i);
boy.setSalary((double) (i + 1));
boy.setBirthday(LocalDateTime.now());
boyList.add(boy);
}
//创建新的sheet页
WriteSheet sheet = EasyExcel.writerSheet("Sheet" + j).build();
writer.write(boyList,sheet );
}
} catch (IOException e) {
throw new RuntimeException(e);
//释放资源
}finally {
writer.finish();
outputStream.flush();
outputStream.close();
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
private void setExcelResponse(HttpServletResponse response, String rawFileName) throws UnsupportedEncodingException {
//设置内容类型
response.setContentType("application/vnd.ms-excel");
//设置编码格式
response.setCharacterEncoding("utf-8");
//设置导出文件名称
String fileName = URLEncoder.encode(rawFileName.concat(".xlsx"), "UTF-8");
//设置响应头
response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName);
}