java实现Excel的导入、导出

一、Excel的导入

导入可采用两种方式，一种是JXL，另一种是POI，但前者不能读取高版本的Excel(07以上)，后者更具兼容性。由于对两种方式都进行了尝试，就都贴出来分享(若有错误，请给予指正)

方式一、JXL导入  所需jar包 JXL.jar

 1 publicstaticList readExcelByJXL(String filePath){
 2 List infoList =newArrayList();
 3 Map> map =newHashMap>();
 4     infoList.clear();
 5 try{
 6 InputStream is =newFileInputStream(filePath);
 7 Workbook workbook =Workbook.getWorkbook(is);
 8 //获取第1张表
 9 Sheet sheet = workbook.getSheet(0);
10 //获取总的列数
11 int columns = sheet.getColumns();
12 //获取总的行数
13 int rows = sheet.getRows();
14 //先列后行(j,i)
15 for(int i =1; i < rows; i++){
16 List contentList =newArrayList();
17     contentList.clear();
18 for(int j =1; j < columns; j++){
19     contentList.add(sheet.getCell(j,i).getContents());
20 }
21     map.put("StorageInfo"+i, contentList);
22 }
23 
24 //遍历map集合，封装成bean
25 for(Map.Entry> entry : map.entrySet()){
26 List list = entry.getValue();
27 PutStorageInfo storageInfo =newPutStorageInfo();
28     storageInfo.setProductcode(list.get(0));
29     storageInfo.setProductsort(list.get(1));
30     storageInfo.setProductbrand(list.get(2));
31     storageInfo.setProductname(list.get(3));
32     storageInfo.setProductquantity(list.get(4));
33     storageInfo.setProductcontent(list.get(5));
34     storageInfo.setProductnetweight(list.get(6));
35     storageInfo.setProductcountry(list.get(7));
36     storageInfo.setProductpdate(list.get(8));
37     storageInfo.setProductprice(list.get(9));
38     storageInfo.setProductmark(list.get(10));
39 
40     infoList.add(storageInfo);
41 }
42     is.close();
43 }catch(Exception e){
44     e.printStackTrace();
45 }
46 return infoList;
47 }

方式二、POI导入  

所需jar包

poi-3.6-20091214.jar

poi-ooxml-3.6-20091214.jar

poi-ooxml-schemas-3.6-20091214.jar

xmlbeans-2.3.0.jar

dom4j-1.6.1.jar

jdom-2.0.6.jar

1.  1 publicstaticList readExcelByPOI(String filePath){
    2 List infoList =newArrayList();
    3 Map> map =newHashMap>();
    4     infoList.clear();
    5 try{
    6 InputStream is =newFileInputStream(filePath);
    7 
    8 int index = filePath.lastIndexOf(".");
    9 String postfix = filePath.substring(index+1);
   10 
   11 Workbook workbook =null;
   12 if("xls".equals(postfix)){
   13     workbook =newHSSFWorkbook(is);
   14 }elseif("xlsx".equals(postfix)){
   15     workbook =newXSSFWorkbook(is);
   16 }
   17 //获取第1张表
   18 Sheet sheet = workbook.getSheetAt(0);
   19 //总的行数
   20 int rows = sheet.getLastRowNum();
   21 //总的列数--->最后一列为null则有问题，读取不完整，将表头的数目作为总的列数，没有的则补为null
   22 int columns = sheet.getRow(0).getLastCellNum();
   23 //先列后行
   24 for(int i =1; i <= rows; i++){
   25 　　Row row = sheet.getRow(i);
   26    if(null!= row && row.getFirstCellNum()==-1){//这一行是空行，不读取
   27    continue;
   28 }
   29 //这一行的总列数
   30 // columns = row.getLastCellNum();
   31 List contentList =newArrayList();
   32     contentList.clear();
   33 for(int j =1; j < columns; j++){
   34 if(row.getCell(j)!=null){
   35     row.getCell(j).setCellType(Cell.CELL_TYPE_STRING);
   36     contentList.add(row.getCell(j).getStringCellValue());
   37 }else{
   38     contentList.add("");
   39 }
   40 }
   41     map.put("StorageInfo"+i, contentList);
   42 }
   43 
   44 //遍历map集合，封装成bean
   45 for(Map.Entry> entry : map.entrySet()){
   46 List list = entry.getValue();
   47 PutStorageInfo storageInfo =newPutStorageInfo();
   48     storageInfo.setProductcode(list.get(0));
   49     storageInfo.setProductsort(list.get(1));
   50     storageInfo.setProductbrand(list.get(2));
   51     storageInfo.setProductname(list.get(3));
   52     storageInfo.setProductquantity(list.get(4));
   53     storageInfo.setProductcontent(list.get(5));
   54     storageInfo.setProductnetweight(list.get(6));
   55     storageInfo.setProductcountry(list.get(7));
   56     storageInfo.setProductpdate(list.get(8));
   57     storageInfo.setProductprice(list.get(9));
   58     storageInfo.setProductmark(list.get(10));
   59 
   60     infoList.add(storageInfo);
   61 }
   62     is.close();
   63 }catch(Exception e){
   64     e.printStackTrace();
   65 }
   66 
   67 return infoList;
   68 }

    

 

二、Excel导出

采用JXL实现

publicstaticvoid creatExcel(List storageInfoList,String fileName){
try{
OutputStream os =newFileOutputStream(fileName);
//创建可写的工作薄
WritableWorkbook workbook =Workbook.createWorkbook(os);
//创建第一张表
WritableSheet sheet = workbook.createSheet("Sheet1",0);
//设置根据内容自动宽度
CellView cellView =newCellView();
    cellView.setAutosize(true);
//在下边for循环中为每一列设置

//设置列宽度,此种方式参数的意思，i-->对应的行或列 j-->要设置的宽度
// sheet.setColumnView(0, 100);
// sheet.setRowView(0, 300);
//设置字体加粗且背景颜色为黄色
WritableFont boldFont =newWritableFont(WritableFont.ARIAL,10,WritableFont.BOLD);//黑体 
WritableCellFormat cellrFormate =newWritableCellFormat(boldFont);
    cellrFormate.setBackground(Colour.YELLOW);
//先添加表头
List titleList = getTitleList();
//循环创建单元格,先列后行
for(int i =0; i < titleList.size(); i++){
//sheet.setColumnView(i, cellView);
    sheet.setColumnView(i,20);

Label label =newLabel(i,0, titleList.get(i), cellrFormate);
    sheet.addCell(label);
}

LogUtil.logOut(JXLWriteExcel.class,storageInfoList.size()+"");

String[][] content = convertToArr(storageInfoList);
//设置content的自适应当前列的宽度，文本太对会自动换行 new Label(j, i+1, content[i][j-1],contentFormat);
WritableCellFormat contentFormat =newWritableCellFormat();
    contentFormat.setWrap(true);

//然后添加入库信息条目
for(int i =0; i < storageInfoList.size(); i++){
Label labelID =newLabel(0,i+1,(i+1)+"");
    sheet.addCell(labelID);

for(int j =1; j < titleList.size(); j++){
Label label =newLabel(j, i+1, content[i][j-1]);
    sheet.addCell(label);
}
}

//把创建的内容写入到输出流中，并关闭输出流
workbook.write();
    workbook.close();
    os.close();

//将存储了入库bean的list清空
storageInfoList.clear();

}catch(Exception e){
    e.printStackTrace();
}
}

privatestaticString[][] convertToArr(List storageInfoList){
String[][] content =newString[storageInfoList.size()][11];
for(int i =0; i < storageInfoList.size(); i++){
PutStorageInfo info = storageInfoList.get(i);
//每个bean中总项有11项
content[i][0]= info.getProductcode();
    content[i][1]= info.getProductsort();
    content[i][2]= info.getProductbrand();
    content[i][3]= info.getProductname();
    content[i][4]= info.getProductquantity();
    content[i][5]= info.getProductcontent();
    content[i][6]= info.getProductnetweight();
    content[i][7]= info.getProductcountry();
    content[i][8]= info.getProductpdate();
    content[i][9]= info.getProductprice();
    content[i][10]= info.getProductmark();
}
return content;

}

privatestaticList getTitleList(){
List list =newArrayList();
    list.add("Item No.");
    list.add("Product code");
    list.add("Sort");
    list.add("Brand");
    list.add("Product Name");
    list.add("Quantity(Pieces)");
    list.add("Content");
list.add("Net Weight");
    list.add("Country");
    list.add("Best before date");
    list.add("Price(EURO)");
    list.add("Remarks");

return list;
}