Spring Boot利用poi导出Excel

至于poi的用法就不多说了，网上多得很，但是发现spring boot结合poi的就不多了，而且大多也有各种各样的问题。

public class ExcelData implements Serializable {

private static final long serialVersionUID = 4444017239100620999L;

// 表头
private List<String> titles;

// 数据
private List<List<Object>> rows;

// 页签名称
private String name;

public List<String> getTitles() {
return titles;
}

public void setTitles(List<String> titles) {
this.titles = titles;
}

public List<List<Object>> getRows() {
return rows;
}

public void setRows(List<List<Object>> rows) {
this.rows = rows;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

}

public class ExportExcelUtils {
public static void exportExcel(HttpServletResponse response, String fileName, ExcelData data) throws Exception {
// 告诉浏览器用什么软件可以打开此文件
response.setHeader("content-Type", "application/vnd.ms-excel");
// 下载文件的默认名称
response.setHeader("Content-Disposition", "attachment;filename="+URLEncoder.encode(fileName, "utf-8"));
exportExcel(data, response.getOutputStream());
}

public static void exportExcel(ExcelData data, OutputStream out) throws Exception {

XSSFWorkbook wb = new XSSFWorkbook();
try {
String sheetName = data.getName();
if (null == sheetName) {
sheetName = "Sheet1";
}
XSSFSheet sheet = wb.createSheet(sheetName);
writeExcel(wb, sheet, data);

wb.write(out);
} finally {
wb.close();
}
}

private static void writeExcel(XSSFWorkbook wb, Sheet sheet, ExcelData data) {

int rowIndex = 0;

rowIndex = writeTitlesToExcel(wb, sheet, data.getTitles());
writeRowsToExcel(wb, sheet, data.getRows(), rowIndex);
autoSizeColumns(sheet, data.getTitles().size() + 1);

}

private static int writeTitlesToExcel(XSSFWorkbook wb, Sheet sheet, List<String> titles) {
int rowIndex = 0;
int colIndex = 0;

Font titleFont = wb.createFont();
titleFont.setFontName("simsun");
titleFont.setBold(true);
// titleFont.setFontHeightInPoints((short) 14);
titleFont.setColor(IndexedColors.BLACK.index);

XSSFCellStyle titleStyle = wb.createCellStyle();
titleStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);
titleStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);
titleStyle.setFillForegroundColor(new XSSFColor(new Color(182, 184, 192)));
titleStyle.setFillPattern(XSSFCellStyle.SOLID_FOREGROUND);
titleStyle.setFont(titleFont);
setBorder(titleStyle, BorderStyle.THIN, new XSSFColor(new Color(0, 0, 0)));

Row titleRow = sheet.createRow(rowIndex);
// titleRow.setHeightInPoints(25);
colIndex = 0;

for (String field : titles) {
Cell cell = titleRow.createCell(colIndex);
cell.setCellValue(field);
cell.setCellStyle(titleStyle);
colIndex++;
}

rowIndex++;
return rowIndex;
}

private static int writeRowsToExcel(XSSFWorkbook wb, Sheet sheet, List<List<Object>> rows, int rowIndex) {
int colIndex = 0;

Font dataFont = wb.createFont();
dataFont.setFontName("simsun");
// dataFont.setFontHeightInPoints((short) 14);
dataFont.setColor(IndexedColors.BLACK.index);

XSSFCellStyle dataStyle = wb.createCellStyle();
dataStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);
dataStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);
dataStyle.setFont(dataFont);
setBorder(dataStyle, BorderStyle.THIN, new XSSFColor(new Color(0, 0, 0)));

for (List<Object> rowData : rows) {
Row dataRow = sheet.createRow(rowIndex);
// dataRow.setHeightInPoints(25);
colIndex = 0;

for (Object cellData : rowData) {
Cell cell = dataRow.createCell(colIndex);
if (cellData != null) {
cell.setCellValue(cellData.toString());
} else {
cell.setCellValue("");
}

cell.setCellStyle(dataStyle);
colIndex++;
}
rowIndex++;
}
return rowIndex;
}

private static void autoSizeColumns(Sheet sheet, int columnNumber) {

for (int i = 0; i < columnNumber; i++) {
int orgWidth = sheet.getColumnWidth(i);
sheet.autoSizeColumn(i, true);
int newWidth = (int) (sheet.getColumnWidth(i) + 100);
if (newWidth > orgWidth) {
sheet.setColumnWidth(i, newWidth);
} else {
sheet.setColumnWidth(i, orgWidth);
}
}
}

private static void setBorder(XSSFCellStyle style, BorderStyle border, XSSFColor color) {
style.setBorderTop(border);
style.setBorderLeft(border);
style.setBorderRight(border);
style.setBorderBottom(border);
style.setBorderColor(BorderSide.TOP, color);
style.setBorderColor(BorderSide.LEFT, color);
style.setBorderColor(BorderSide.RIGHT, color);
style.setBorderColor(BorderSide.BOTTOM, color);
}
}

@RestController
public class ExcelController {
@RequestMapping(value = "/excel", method = RequestMethod.GET)
public void excel(HttpServletResponse response) throws Exception {
ExcelData data = new ExcelData();
data.setName("hello");
List<String> titles = new ArrayList();
titles.add("a1");
titles.add("a2");
titles.add("a3");
data.setTitles(titles);

List<List<Object>> rows = new ArrayList();
List<Object> row = new ArrayList();
row.add("11111111111");
row.add("22222222222");
row.add("3333333333");
rows.add(row);

data.setRows(rows);

//生成本地
/*File f = new File("c:/test.xlsx");
FileOutputStream out = new FileOutputStream(f);
ExportExcelUtils.exportExcel(data, out);
out.close();*/
ExportExcelUtils.exportExcel(response,"hello.xlsx",data);
}
}

功能比较简单，没有做太多扩展，想自己扩展的可以查看poi的官方文档自行扩展，简单的很。

如果用POST提交，前端不能用Ajax，只能用form表单提交，参数接受Controller那一块用@ModelAttribute,@RequestBody是专门用于接受Json数据的

项目地址：https://github.com/xiaopotian1990/SpringBootExcel