Java export Excel file

ExcelData data = new ExcelData();
("Tag Name");

// TitleList<String> titles = new ArrayList();
("First Column");
("Second Column");
("Third Column");
(titles);

// contentList<List<Object>> rows = new ArrayList();
for(int i=0; i<10; i++){
    List<Object> row = new ArrayList();
    (The+"i"+行The一列);
    (The+"i"+行The二列);
    (The+"i"+行The三列);
    (row);
}
(rows);

XSSFWorkbook wb = (data);
ByteArrayOutputStream outByteStream = new ByteArrayOutputStream();
(outByteStream);
();

HttpHeaders headers = new HttpHeaders();
("Content-Type", "application/-excel");
("Connection", "close");
("file", "type");
("Content-Disposition", "attachment; filename=" + new String(("utf-8"), "ISO-8859-1"));

return new ResponseEntity<byte[]>((), headers, );

("application/");
("UTF-8");
("file", "type");
("Connection", "close");
("Content-disposition", "attachment;filename=" + ExcelUtil.toUtf8String("file name"));

String filePath = "/docs/";
InputStream inputStream = new ClassPathResource(filePath).getInputStream();
XSSFWorkbook xssfWorkbook = new XSSFWorkbook(inputStream);

// sheet
XSSFSheet sheetAt = (0);
(0, 15000);

// Cell formatXSSFCellStyle cellStyle = ();
();
();
();
();
();
();

// TitlewriteValue(sheetAt, cellStyle, 0, 0, "First Column");
writeValue(sheetAt, cellStyle, 0, 0, "Second Column");
writeValue(sheetAt, cellStyle, 0, 0, "Third Column");

// contentfor(int i=1; i=10; i++){
    writeValue(sheetAt, cellStyle, i, 0, "Third"+i+"Road first column");
    writeValue(sheetAt, cellStyle, i, 1, "Third"+i+"Road Second Column");
    writeValue(sheetAt, cellStyle, i, 2, "Third"+i+"Road Third Column");
}

(());

if (null != xssfWorkbook) {
    ();
}