poi-3.7-20101029.jar,下载地址:http://download.csdn.net/detail/evangel_z/4107089
geronimo-stax-api_1.0_spec-1.0.jar,下载地址:http://download.csdn.net/detail/evangel_z/4107083
xmlbeans-2.3.0.jar,下载地址:http://download.csdn.net/detail/evangel_z/4107140
poi-ooxml-3.7-20101029.jar,下载地址:http://download.csdn.net/detail/evangel_z/4107145
poi-ooxml-schemas-3.7-20101029.jar,下载地址:http://download.csdn.net/detail/evangel_z/4108997
以上5个jar,就可读取Excel 2003;
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读取Excel 2007,请加上dom4j-1.6.1.jar,下载地址:http://download.csdn.net/detail/evangel_z/6739735
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poi-3.6-20091214.jar,下载地址:http://download.csdn.net/detail/evangel_z/3895051
poi-contrib-3.6-20091214.jar,下载地址:http://download.csdn.net/detail/evangel_z/4107197
poi-scratch.6-20091214.jar,下载地址:http://download.csdn.net/detail/evangel_z/4107204
Java POI jar包专辑,下载地址:http://download.csdn.net/album/detail/3314
读取excel 文件的 java 代码:
public class ReadExcel {
/**
* 对外提供读取excel 的方法
* */
public static List> readExcel(File file) throws IOException{
String fileName = file.getName();
String extension = fileName.lastIndexOf(".")==-1?"":fileName.substring(fileName.lastIndexOf(".")+1);
if("xls".equals(extension)){
return read2003Excel(file);
}else if("xlsx".equals(extension)){
return read2007Excel(file);
}else{
throw new IOException("不支持的文件类型");
}
}
/**
* 读取 office 2003 excel
* @throws IOException
* @throws FileNotFoundException */
private static List> read2003Excel(File file) throws IOException{
List> list = new LinkedList>();
HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));
HSSFSheet sheet = hwb.getSheetAt(0);
Object value = null;
HSSFRow row = null;
HSSFCell cell = null;
for(int i = sheet.getFirstRowNum();i<= sheet.getPhysicalNumberOfRows();i++){
row = sheet.getRow(i);
if (row == null) {
continue;
}
List
说明:该类中共封装了三个方法,对外提供的读取excel文件的方法,两个私有的分别读取excel2003和excel2007的方法。外部使用,只需调用readExcel 方法,传入一个File 参数,程序根据文件扩展名来判断选取那个方法来读取Excel文件。
Q:excel的第1,2行有数据,第3,4行没数据,第5行有数据,第5行数据显示不出来。
A:sheet.getPhysicalNumberOfRows()获取有效的行数,多谢热心网友的指正,改进后代码如下:
public class ReadExcel {
/**
* 对外提供读取excel 的方法
* */
public static List> readExcel(File file) throws IOException {
String fileName = file.getName();
String extension = fileName.lastIndexOf(".") == -1 ? "" : fileName
.substring(fileName.lastIndexOf(".") + 1);
if ("xls".equals(extension)) {
return read2003Excel(file);
} else if ("xlsx".equals(extension)) {
return read2007Excel(file);
} else {
throw new IOException("不支持的文件类型");
}
}
/**
* 读取 office 2003 excel
* @throws IOException
* @throws FileNotFoundException
*/
private static List> read2003Excel(File file)
throws IOException {
List> list = new LinkedList>();
HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));
HSSFSheet sheet = hwb.getSheetAt(0);
Object value = null;
HSSFRow row = null;
HSSFCell cell = null;
int counter = 0;
for (int i = sheet.getFirstRowNum(); counter < sheet
.getPhysicalNumberOfRows(); i++) {
row = sheet.getRow(i);
if (row == null) {
continue;
} else {
counter++;
}
List linked = new LinkedList();
for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
cell = row.getCell(j);
if (cell == null) {
continue;
}
DecimalFormat df = new DecimalFormat("0");// 格式化 number String 字符
SimpleDateFormat sdf = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
switch (cell.getCellType()) {
case XSSFCell.CELL_TYPE_STRING:
System.out.println(i + "行" + j + " 列 is String type");
value = cell.getStringCellValue();
break;
case XSSFCell.CELL_TYPE_NUMERIC:
System.out.println(i + "行" + j
+ " 列 is Number type ; DateFormt:"
+ cell.getCellStyle().getDataFormatString());
if ("@".equals(cell.getCellStyle().getDataFormatString())) {
value = df.format(cell.getNumericCellValue());
} else if ("General".equals(cell.getCellStyle()
.getDataFormatString())) {
value = nf.format(cell.getNumericCellValue());
} else {
value = sdf.format(HSSFDateUtil.getJavaDate(cell
.getNumericCellValue()));
}
break;
case XSSFCell.CELL_TYPE_BOOLEAN:
System.out.println(i + "行" + j + " 列 is Boolean type");
value = cell.getBooleanCellValue();
break;
case XSSFCell.CELL_TYPE_BLANK:
System.out.println(i + "行" + j + " 列 is Blank type");
value = "";
break;
default:
System.out.println(i + "行" + j + " 列 is default type");
value = cell.toString();
}
if (value == null || "".equals(value)) {
continue;
}
linked.add(value);
}
list.add(linked);
}
return list;
}
/**
* 读取Office 2007 excel
* */
private static List> read2007Excel(File file)
throws IOException {
List> list = new LinkedList>();
// 构造 XSSFWorkbook 对象,strPath 传入文件路径
XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(file));
// 读取第一章表格内容
XSSFSheet sheet = xwb.getSheetAt(0);
Object value = null;
XSSFRow row = null;
XSSFCell cell = null;
int counter = 0;
for (int i = sheet.getFirstRowNum(); counter < sheet
.getPhysicalNumberOfRows(); i++) {
row = sheet.getRow(i);
if (row == null) {
continue;
} else {
counter++;
}
List linked = new LinkedList();
for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
cell = row.getCell(j);
if (cell == null) {
continue;
}
DecimalFormat df = new DecimalFormat("0");// 格式化 number String 字符
SimpleDateFormat sdf = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
switch (cell.getCellType()) {
case XSSFCell.CELL_TYPE_STRING:
System.out.println(i + "行" + j + " 列 is String type");
value = cell.getStringCellValue();
break;
case XSSFCell.CELL_TYPE_NUMERIC:
System.out.println(i + "行" + j
+ " 列 is Number type ; DateFormt:"
+ cell.getCellStyle().getDataFormatString());
if ("@".equals(cell.getCellStyle().getDataFormatString())) {
value = df.format(cell.getNumericCellValue());
} else if ("General".equals(cell.getCellStyle()
.getDataFormatString())) {
value = nf.format(cell.getNumericCellValue());
} else {
value = sdf.format(HSSFDateUtil.getJavaDate(cell
.getNumericCellValue()));
}
break;
case XSSFCell.CELL_TYPE_BOOLEAN:
System.out.println(i + "行" + j + " 列 is Boolean type");
value = cell.getBooleanCellValue();
break;
case XSSFCell.CELL_TYPE_BLANK:
System.out.println(i + "行" + j + " 列 is Blank type");
value = "";
break;
default:
System.out.println(i + "行" + j + " 列 is default type");
value = cell.toString();
}
if (value == null || "".equals(value)) {
continue;
}
linked.add(value);
}
list.add(linked);
}
return list;
}
public static void main(String[] args) {
try {
readExcel(new File("D:\\test.xlsx"));
// readExcel(new File("D:\\test.xls"));
} catch (IOException e) {
e.printStackTrace();
}
}
}
Java POI导出Excel经典实现 导出Excel弹出下载框 Spring Boot【不定期更新】
源代码下载地址:http://download.csdn.net/detail/evangel_z/7834173
最新代码下载地址:https://github.com/T5750/poi
相关说明:http://blog.csdn.net/evangel_z/article/details/7332535#t2