Java上传Excel并解析

文件上传

public String uploadFile(CommonsMultipartFile file,String uploadPath,String realUploadPath){
InputStream is = null;
OutputStream os = null;
Calendar calendar = Calendar.getInstance();//获取时间
long excelName = calendar.getTime().getTime();

try {
is = file.getInputStream();
String des = realUploadPath + "/"+Long.toString(excelName)+file.getOriginalFilename();
os = new FileOutputStream(des);

byte[] buffer = new byte[1024];
int len = 0;

while((len = is.read(buffer))>0){
os.write(buffer);
}

} catch (Exception e) {
e.printStackTrace();
}finally{
if(is!=null){
try{
is.close();
}catch (Exception e2){
e2.printStackTrace();
}
}

if(os!=null){
try{
os.close();
}catch (Exception e2){
e2.printStackTrace();
}
}
}
//返回路径
return uploadPath + "/"+Long.toString(excelName)+file.getOriginalFilename();
}


常用的Excel解析方式有两种JXL,POI
jxl用起来相对简单，但只支持Excel2003版本，也就是说jxl无法解析.xlsx的Excel文件，而POI会识别Excel版本进行解析，所以大部分人更倾向于POI

jxl使用时需要在项目中导入jxl.jar包

poi需要导入

poi-3.14-20160307.jar

poi-ooxml-3.14-20160307.jar

poi-ooxml-schemas-3.14-20160307.jar

commons-io-1.4.jar

commons-fileupload-1.2.1.jar

jxl解析代码public String readExcel(CommonsMultipartFile file,HttpServletRequest request)throws IOException, WriteException{

StringBuffer sb = new StringBuffer();//将读取的内容存入StringBUffer中
try {
Workbook book = Workbook.getWorkbook(file.getInputStream());
try{
Sheet sheet = book.getSheet(0);
for(int i = 0 ; i < 3 ; i++){//i表示行数
for(int j = 0 ; j < 4 ; j++){//j表示列数
sb.append(sheet.getCell(j, i).getContents()+"\t");
}
sb.append("\n");
}
System.out.println(sb);
}finally{
if(book != null){
book.close();
}
}
} catch (BiffException e) {
System.err.println(e+"");
} catch (IOException e) {
System.err.println(e+"文件读取错误");
}
return "";
}poi代码
private POIFSFileSystem fs;
private HSSFWorkbook wb;
private HSSFSheet sheet;
private HSSFRow row;
/*读取标题excel第一行内容*/
public String[] readExcelTitle(InputStream is) {
try {
fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
row = sheet.getRow(0);
// 标题总列数
int colNum = row.getPhysicalNumberOfCells();
System.out.println("colNum:" + colNum);
String[] title = new String[colNum];
for (int i = 0; i < colNum; i++) {
//title[i] = getStringCellValue(row.getCell((short) i));
title[i] = getCellFormatValue(row.getCell((short) i));
}
return title;
}
/*读取内容*/
public void readExcelContent(InputStream is) {
Map<Integer, ModelCourse> content = new HashMap<Integer, ModelCourse>();
ModelCourse model=new ModelCourse();
try {
fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
// 得到总行数
int rowNum = sheet.getLastRowNum();
row = sheet.getRow(0);
int colNum = row.getPhysicalNumberOfCells();

// 正文内容从第二行开始,第一行为表头的标题
for (int i = 1; i <=rowNum; i++) {
row = sheet.getRow(i);
int j = 0;

while (j < colNum) {

if(j==1){
model.setCourse_id(getCellFormatValue(row.getCell((short) j)));
}
else if(j==2){
model.setCourse_name(getCellFormatValue(row.getCell((short) j)));
}
else if(j==3){
model.setCourse_time(getCellFormatValue(row.getCell((short) j)));
}
else if(j==4){
model.setCourse_place(getCellFormatValue(row.getCell((short) j)));
}
j++;

}
content.put(i, model);
addCourse(model);
}
}