/**
* 导入Excel文件（支持“XLS”和“XLSX”格式）
* @version 2013-03-10
*/
public class ImportExcel {
private static Logger log = LoggerFactory.getLogger(ImportExcel.class);
/**
* 工作薄对象
*/
private Workbook wb;
/**
* 工作表对象
*/
private Sheet sheet;
/**
* 标题行号
*/
private int headerNum;
/**
* 构造函数
* @param path 导入文件，读取第一个工作表
* @param headerNum 标题行号，数据行号=标题行号+1
* @throws InvalidFormatException
* @throws IOException
*/
public ImportExcel(String fileName, int headerNum)
throws InvalidFormatException, IOException {
this(new File(fileName), headerNum);
}
/**
* 构造函数
* @param path 导入文件对象，读取第一个工作表
* @param headerNum 标题行号，数据行号=标题行号+1
* @throws InvalidFormatException
* @throws IOException
*/
public ImportExcel(File file, int headerNum)
throws InvalidFormatException, IOException {
this(file, headerNum, 0);
}
/**
* 构造函数
* @param path 导入文件
* @param headerNum 标题行号，数据行号=标题行号+1
* @param sheetIndex 工作表编号
* @throws InvalidFormatException
* @throws IOException
*/
public ImportExcel(String fileName, int headerNum, int sheetIndex)
throws InvalidFormatException, IOException {
this(new File(fileName), headerNum, sheetIndex);
}
/**
* 构造函数
* @param path 导入文件对象
* @param headerNum 标题行号，数据行号=标题行号+1
* @param sheetIndex 工作表编号
* @throws InvalidFormatException
* @throws IOException
*/
public ImportExcel(File file, int headerNum, int sheetIndex)
throws InvalidFormatException, IOException {
this(file.getName(), new FileInputStream(file), headerNum, sheetIndex);
}
/**
* 构造函数
* @param file 导入文件对象
* @param headerNum 标题行号，数据行号=标题行号+1
* @param sheetIndex 工作表编号
* @throws InvalidFormatException
* @throws IOException
*/
public ImportExcel(MultipartFile multipartFile, int headerNum, int sheetIndex)
throws InvalidFormatException, IOException {
this(multipartFile.getOriginalFilename(), multipartFile.getInputStream(), headerNum, sheetIndex);
}
/**
* 构造函数
* @param path 导入文件对象
* @param headerNum 标题行号，数据行号=标题行号+1
* @param sheetIndex 工作表编号
* @throws InvalidFormatException
* @throws IOException
*/
public ImportExcel(String fileName, InputStream is, int headerNum, int sheetIndex)
throws InvalidFormatException, IOException {
if (StringUtils.isBlank(fileName)){
throw new RuntimeException("导入文档为空!");
}else if(fileName.toLowerCase().endsWith("xls")){
this.wb = new HSSFWorkbook(is);
}else if(fileName.toLowerCase().endsWith("xlsx")){
this.wb = new XSSFWorkbook(is);
}else{
throw new RuntimeException("文档格式不正确!");
}
if (this.wb.getNumberOfSheets()<sheetIndex){
throw new RuntimeException("文档中没有工作表!");
}
this.sheet = this.wb.getSheetAt(sheetIndex);
this.headerNum = headerNum;
log.debug("Initialize success.");
}
/**
* 获取行对象
* @param rownum
* @return
*/
public Row getRow(int rownum){
return this.sheet.getRow(rownum);
}
/**
* 获取数据行号
* @return
*/
public int getDataRowNum(){
return headerNum+1;
}
/**
* 获取最后一个数据行号
* @return
*/
public int getLastDataRowNum(){
return this.sheet.getLastRowNum()+headerNum;
}
/**
* 获取最后一个列号
* @return
*/
public int getLastCellNum(){
return this.getRow(headerNum).getLastCellNum();
}
/**
* 获取单元格值
* @param row 获取的行
* @param column 获取单元格列号
* @return 单元格值
*/
public Object getCellValue(Row row, int column){
Object val = "";
try{
Cell cell = row.getCell(column);
if (cell != null){
if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC){
val = cell.getNumericCellValue();
}else if (cell.getCellType() == Cell.CELL_TYPE_STRING){
val = cell.getStringCellValue();
}else if (cell.getCellType() == Cell.CELL_TYPE_FORMULA){
val = cell.getCellFormula();
}else if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN){
val = cell.getBooleanCellValue();
}else if (cell.getCellType() == Cell.CELL_TYPE_ERROR){
val = cell.getErrorCellValue();
}
}
}catch (Exception e) {
return val;
}
return val;
}
/**
* 获取导入数据列表
* @param cls 导入对象类型
* @param groups 导入分组
*/
public <E> List<E> getDataList(Class<E> cls, int... groups) throws InstantiationException, IllegalAccessException{
List<Object[]> annotationList = Lists.newArrayList();
// Get annotation field
Field[] fs = cls.getDeclaredFields();
for (Field f : fs){
ExcelField ef = f.getAnnotation(ExcelField.class);
if (ef != null && (ef.type()==0 || ef.type()==2)){
if (groups!=null && groups.length>0){
boolean inGroup = false;
for (int g : groups){
if (inGroup){
break;
}
for (int efg : ef.groups()){
if (g == efg){
inGroup = true;
annotationList.add(new Object[]{ef, f});
break;
}
}
}
}else{
annotationList.add(new Object[]{ef, f});
}
}
}
// Get annotation method
Method[] ms = cls.getDeclaredMethods();
for (Method m : ms){
ExcelField ef = m.getAnnotation(ExcelField.class);
if (ef != null && (ef.type()==0 || ef.type()==2)){
if (groups!=null && groups.length>0){
boolean inGroup = false;
for (int g : groups){
if (inGroup){
break;
}
for (int efg : ef.groups()){
if (g == efg){
inGroup = true;
annotationList.add(new Object[]{ef, m});
break;
}
}
}
}else{
annotationList.add(new Object[]{ef, m});
}
}
}
// Field sorting
Collections.sort(annotationList, new Comparator<Object[]>() {
public int compare(Object[] o1, Object[] o2) {
return new Integer(((ExcelField)o1[0]).sort()).compareTo(
new Integer(((ExcelField)o2[0]).sort()));
};
});
//log.debug("Import column count:"+annotationList.size());
// Get excel data
List<E> dataList = Lists.newArrayList();
for (int i = this.getDataRowNum(); i < this.getLastDataRowNum(); i++) {
E e = (E)cls.newInstance();
int column = 0;
Row row = this.getRow(i);
StringBuilder sb = new StringBuilder();
for (Object[] os : annotationList){
Object val = this.getCellValue(row, column++);
if (val != null){
ExcelField ef = (ExcelField)os[0];
// If is dict type, get dict value
if (StringUtils.isNotBlank(ef.dictType())){
val = DictUtils.getDictValue(val.toString(), ef.dictType(), "");
//log.debug("Dictionary type value: ["+i+","+colunm+"] " + val);
}
// Get param type and type cast
Class<?> valType = Class.class;
if (os[1] instanceof Field){
valType = ((Field)os[1]).getType();
}else if (os[1] instanceof Method){
Method method = ((Method)os[1]);
if ("get".equals(method.getName().substring(0, 3))){
valType = method.getReturnType();
}else if("set".equals(method.getName().substring(0, 3))){
valType = ((Method)os[1]).getParameterTypes()[0];
}
}
//log.debug("Import value type: ["+i+","+column+"] " + valType);
try {
if (valType == String.class){
String s = String.valueOf(val.toString());
if(StringUtils.endsWith(s, ".0")){
val = StringUtils.substringBefore(s, ".0");
}else{
val = String.valueOf(val.toString());
}
}else if (valType == Integer.class){
val = Double.valueOf(val.toString()).intValue();
}else if (valType == Long.class){
val = Double.valueOf(val.toString()).longValue();
}else if (valType == Double.class){
val = Double.valueOf(val.toString());
}else if (valType == Float.class){
val = Float.valueOf(val.toString());
}else if (valType == Date.class){
val = DateUtil.getJavaDate((Double)val);
}else{
if (ef.fieldType() != Class.class){
val = ef.fieldType().getMethod("getValue", String.class).invoke(null, val.toString());
}else{
val = Class.forName(this.getClass().getName().replaceAll(this.getClass().getSimpleName(),
"fieldtype."+valType.getSimpleName()+"Type")).getMethod("getValue", String.class).invoke(null, val.toString());
}
}
} catch (Exception ex) {
log.info("Get cell value ["+i+","+column+"] error: " + ex.toString());
val = null;
}
// set entity value
if (os[1] instanceof Field){
Reflections.invokeSetter(e, ((Field)os[1]).getName(), val);
}else if (os[1] instanceof Method){
String mthodName = ((Method)os[1]).getName();
if ("get".equals(mthodName.substring(0, 3))){
mthodName = "set"+StringUtils.substringAfter(mthodName, "get");
}
Reflections.invokeMethod(e, mthodName, new Class[] {valType}, new Object[] {val});
}
}
sb.append(val+", ");
}
dataList.add(e);
log.debug("Read success: ["+i+"] "+sb.toString());
}
return dataList;
}
// /**
// * 导入测试
// */
// public static void main(String[] args) throws Throwable {
//
// ImportExcel ei = new ImportExcel("target/export.xlsx", 1);
//
// for (int i = ei.getDataRowNum(); i < ei.getLastDataRowNum(); i++) {
// Row row = ei.getRow(i);
// for (int j = 0; j < ei.getLastCellNum(); j++) {
// Object val = ei.getCellValue(row, j);
// System.out.print(val+", ");
// }
// System.out.print("\n");
// }
//
// }
}
原文：http://my.oschina.net/thomas2/blog/515932