java中Excel工具类（可以将生成的Excel文件放在当前环境下 linux/windows）
public class ExcelUtil {
private final static Logger log = Logger.getLogger(ExcelUtil.class);
private static Sheet initSheet;
static {
initSheet = new Sheet(1, 0);
initSheet.setSheetName("sheet");
initSheet.setAutoWidth(Boolean.TRUE);
}
public static List<Object> readLessThan1000Row(String filePath){
return readLessThan1000RowBySheet(filePath,null);
}
public static List<Object> readLessThan1000RowBySheet(String filePath, Sheet sheet){
if(!StringUtils.hasText(filePath)){
return null;
}
sheet = sheet != null ? sheet : initSheet;
InputStream fileStream = null;
try {
fileStream = new FileInputStream(filePath);
return EasyExcelFactory.read(fileStream, sheet);
} catch (FileNotFoundException e) {
log.info("找不到文件或文件路径错误, 文件："+ filePath);
}finally {
try {
if(fileStream != null){
fileStream.close();
}
} catch (IOException e) {
log.info("excel文件读取失败, 失败原因：{}", e);
}
}
return null;
}
public static List<Object> readMoreThan1000Row(String filePath){
return readMoreThan1000RowBySheet(filePath,null);
}
public static List<Object> readMoreThan1000RowBySheet(String filePath, Sheet sheet){
if(!StringUtils.hasText(filePath)){
return null;
}
sheet = sheet != null ? sheet : initSheet;
InputStream fileStream = null;
try {
fileStream = new FileInputStream(filePath);
ExcelListener excelListener = new ExcelListener();
EasyExcelFactory.readBySax(fileStream, sheet, excelListener);
return excelListener.getDatas();
} catch (FileNotFoundException e) {
log.error("找不到文件或文件路径错误, 文件：" + filePath);
}finally {
try {
if(fileStream != null){
fileStream.close();
}
} catch (IOException e) {
log.error("excel文件读取失败, 失败原因：{}", e);
}
}
return null;
}
public static void writeBySimple(String filePath, List<List<Object>> data, List<String> head){
writeSimpleBySheet(filePath,data,head,null);
}
public static void writeSimpleBySheet(String filePath, List<List<Object>> data, List<String> head, Sheet sheet){
sheet = (sheet != null) ? sheet : initSheet;
if(head != null){
List<List<String>> list = new ArrayList<>();
head.forEach(h -> list.add(Collections.singletonList(h)));
sheet.setHead(list);
}
OutputStream outputStream = null;
ExcelWriter writer = null;
try {
outputStream = new FileOutputStream(filePath);
writer = EasyExcelFactory.getWriter(outputStream);
writer.write1(data,sheet);
} catch (FileNotFoundException e) {
log.error("找不到文件或文件路径错误, 文件："+ filePath);
}finally {
try {
if(writer != null){
writer.finish();
}
if(outputStream != null){
outputStream.close();
}
} catch (IOException e) {
log.error("excel文件导出失败, 失败原因：{}", e);
}
}
}
public static void writeWithTemplate(String filePath, List<? extends BaseRowModel> data){
writeWithTemplateAndSheet(filePath,data,null);
}
public static void writeWithTemplateAndSheet(String filePath, List<? extends BaseRowModel> data, Sheet sheet){
if(CollectionUtils.isEmpty(data)){
return;
}
sheet = (sheet != null) ? sheet : initSheet;
sheet.setClazz(data.get(0).getClass());
OutputStream outputStream = null;
ExcelWriter writer = null;
try {
outputStream = new FileOutputStream(filePath);
writer = EasyExcelFactory.getWriter(outputStream);
writer.write(data,sheet);
} catch (FileNotFoundException e) {
log.error("找不到文件或文件路径错误, 文件：" + filePath);
}finally {
try {
if(writer != null){
writer.finish();
}
if(outputStream != null){
outputStream.close();
}
} catch (IOException e) {
log.error("excel文件导出失败, 失败原因：{}", e);
}
}
}
public static void writeWithMultipleSheel(String filePath,List<MultipleSheelPropety> multipleSheelPropetys){
if(CollectionUtils.isEmpty(multipleSheelPropetys)){
return;
}
OutputStream outputStream = null;
ExcelWriter writer = null;
try {
outputStream = new FileOutputStream(filePath);
writer = EasyExcelFactory.getWriter(outputStream);
for (MultipleSheelPropety multipleSheelPropety : multipleSheelPropetys) {
Sheet sheet = multipleSheelPropety.getSheet() != null ? multipleSheelPropety.getSheet() : initSheet;
if(!CollectionUtils.isEmpty(multipleSheelPropety.getData())){
sheet.setClazz(multipleSheelPropety.getData().get(0).getClass());
}
writer.write(multipleSheelPropety.getData(), sheet);
}
} catch (FileNotFoundException e) {
log.error("找不到文件或文件路径错误, 文件：" + filePath);
}finally {
try {
if(writer != null){
writer.finish();
}
if(outputStream != null){
outputStream.close();
}
} catch (IOException e) {
log.error("excel文件导出失败, 失败原因：{}", e);
}
}
}
@Data
public static class MultipleSheelPropety{
private List<? extends BaseRowModel> data;
private Sheet sheet;
}
@Getter
@Setter
public static class ExcelListener extends AnalysisEventListener {
private List<Object> datas = new ArrayList<>();
@Override
public void invoke(Object object, AnalysisContext context) {
if (object != null) {
datas.add(object);
}
}
@Override
public void doAfterAllAnalysed(AnalysisContext context) {
}
}
}
public class ExcelListener extends AnalysisEventListener {
private List<Object> datas = new ArrayList<>();
@Override
public void invoke(Object object, AnalysisContext analysisContext) {
if(object != null) {
datas.add(object);
}
doSomething(object);
}
private void doSomething(Object object) {
}
@Override
public void doAfterAllAnalysed(AnalysisContext analysisContext) {
}
public List<Object> getDatas() {
return datas;
}
public void setDatas(List<Object> datas) {
this.datas = datas;
}
}
@Test
public void simpleExport() {
String filePath = "C:\\dowloads\\测试.xlsx";
List<List<Object>> data = new ArrayList<>();
data.add(Arrays.asList("111","222","333"));
data.add(Arrays.asList("111","222","333"));
data.add(Arrays.asList("444","555",null));
List<String> head = Arrays.asList("表头1", "表头2", "表头3");
ExcelUtil.writeBySimple(filePath,data,head);
}
