JAVA 中的 Excel 到 Json 转换器 [英] Excel to Json converter in JAVA
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问题描述
我正在尝试将 excel 数据转换为 JSON 格式.通过读取行和列并将数据设置为列表，然后将该列表转换为 JSON 格式，我成功地转换了 excel 数据.
Am trying to covert the excel data into JSON format. And i am successful upto converting excel data by reading the rows and columns and set the data to list and then converting that List to JSON format.
但是，我停留在下一个级别的 JSON 中，格式将类似于
But, I stuck in next level of JSON where the format will be like
这是我使用的代码，但尚未开始如何使嵌套数据(如 3 列数据)应出现在一个数组中，如上图.
Here is the code which iam using, But not yet started how to make that nested data like 3 columns data should come in one array like the above image.
Pojo 类:
public class Products implements Serializable{
@Id
@Column(name="ID")
private String id;
@Column(name="PRODUCTID")
private String productId;
@Column(name="NAMEID")
private String nameId;
@Column(name="NAME")
private String name;
@Column(name="P_DESC")
private String desc;
@Column(name="DIMENSION")
private String dimension;
@Column(name="CATEGORY")
private String category;
@Column(name="SUB_CATEGORY")
private String subcategory;
@Column(name="CATEGORYID")
private String categoryId;
@Column(name="SUBCATEGORYID")
private String subcategoryId;
@Column(name="TAGS")
private String tags;
@Column(name="DESIGNER")
private String designer;
@Column(name="CURR")
private String curr;
@Column(name="POPULARITY")
private String popularity;
@Column(name="RELEVANCE")
private String relevance;
@Column(name="SHORTLISTED")
private String shortlisted;
@Column(name="LIKES")
private String likes;
@Column(name="CREATE_String")
private String createDt;
@Column(name="PAGEID")
private String pageId;
@Column(name="STYLENAME")
private String styleName;
@Column(name="STYLEID")
private String styleId;
@Column(name="PRICERANGE")
private String priceRange;
@Column(name="PRICEID")
private String priceId;
@Column(name="DEFAULT_PRICE")
private String defaultPrice;
@Column(name="DEFAULT_MATERIAL")
private String defaultMaterial;
@Column(name="DEFAULT_FINISH")
private String defaultFinish;
/* setters and getters */
}
ExceltoJsonConverter 类:
public static void uploadXLS(MultipartFile file, Document doc)
throws IOException {
Products products = new Products();
List<Products> productsList = new ArrayList<Products>();
logger.info("uploadExcel method");
HSSFWorkbook wb = null;
try {
wb= new HSSFWorkbook(file.getInputStream());
System.out.println("workbook: "+wb);
HSSFSheet sheet = wb.getSheetAt(0);
System.out.println("worksheet: "+sheet);
HSSFRow row;
Iterator<Row> iterator = sheet.iterator();
while (iterator.hasNext()) {
products = new Products();
Row nextRow = iterator.next();
Iterator<Cell> cellIterator = nextRow.cellIterator();
Cell cell = cellIterator.next();
Iterator cells = nextRow.cellIterator();
cell=(HSSFCell) cells.next();
if (cell.getCellType() == HSSFCell.CELL_TYPE_STRING)
{
System.out.print(cell.getStringCellValue()+" ");
}
else if(cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC)
{
System.out.print(cell.getNumericCellValue()+" ");
}
else if(HSSFDateUtil.isCellDateFormatted(cell)){
Date date = HSSFDateUtil.getJavaDate(cell.getNumericCellValue());
} else
{
//U Can Handel Boolean, Formula, Errors
}
products.setId(new DataFormatter().formatCellValue(nextRow.getCell(0)));
products.setProductId(new DataFormatter().formatCellValue(nextRow.getCell(1)));
products.setNameId(new DataFormatter().formatCellValue(nextRow.getCell(2)));
products.setName(new DataFormatter().formatCellValue(nextRow.getCell(3)));
products.setDesc(new DataFormatter().formatCellValue(nextRow.getCell(4)));
products.setDimension(new DataFormatter().formatCellValue(nextRow.getCell(5)));
products.setCategory(new DataFormatter().formatCellValue(nextRow.getCell(6)));
products.setSubcategory((new DataFormatter().formatCellValue(nextRow.getCell(7))));
products.setCategoryId(new DataFormatter().formatCellValue(nextRow.getCell(8)));
products.setSubcategoryId((new DataFormatter().formatCellValue(nextRow.getCell(9))));
products.setTags((new DataFormatter().formatCellValue(nextRow.getCell(10))));
products.setDesigner((new DataFormatter().formatCellValue(nextRow.getCell(11))));
products.setCurr((new DataFormatter().formatCellValue(nextRow.getCell(12))));
products.setPopularity((new DataFormatter().formatCellValue(nextRow.getCell(13))));
products.setRelevance((new DataFormatter().formatCellValue(nextRow.getCell(14))));
products.setShortlisted((new DataFormatter().formatCellValue(nextRow.getCell(15))));
products.setLikes((new DataFormatter().formatCellValue(nextRow.getCell(16))));
products.setCreateDt((new DataFormatter().formatCellValue(nextRow.getCell(17))));
products.setPageId((new DataFormatter().formatCellValue(nextRow.getCell(18))));
products.setStyleName((new DataFormatter().formatCellValue(nextRow.getCell(19))));
products.setStyleId((new DataFormatter().formatCellValue(nextRow.getCell(20))));
products.setPriceRange((new DataFormatter().formatCellValue(nextRow.getCell(21))));
products.setPriceId((new DataFormatter().formatCellValue(nextRow.getCell(22))));
products.setDefaultPrice((new DataFormatter().formatCellValue(nextRow.getCell(23))));
products.setDefaultMaterial((new DataFormatter().formatCellValue(nextRow.getCell(24))));
products.setDefaultFinish((new DataFormatter().formatCellValue(nextRow.getCell(25))));
Map<String, String> inputMap = new HashMap<String, String>();
inputMap.put("name", "Java2Novice");
inputMap.put("site", "http://java2novice.com");
productsList.add(products);
System.out.println(productsList);
// JSON CONVERTER
ObjectMapper mapper = new ObjectMapper();
System.out.println("productsList: "+products);
DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
Date date = new Date();
String location = dateFormat.format(date);
System.out.println("productsList final: "+products);
// Convert object to JSON string and save into file directly
mapper.writeValue(new File("D:\\"+location+"mygubbi.json"), productsList);
// Convert object to JSON string and save into file directly
mapper.writeValue(new File("D:\\products.json"), productsList);
// Convert object to JSON string
String jsonInString = mapper.writeValueAsString(productsList);
System.out.println("JsonInString " +jsonInString);
// Convert object to JSON string and pretty print
jsonInString = mapper.writerWithDefaultPrettyPrinter()
.writeValueAsString(products);
System.out.println("Final Json" +mapper.writerWithDefaultPrettyPrinter()
.writeValueAsString(products));
mapper.writeValue(new File("D:\\productsJson.json"), jsonInString);
}
} catch (JsonGenerationException e) {
e.printStackTrace();
} catch (JsonMappingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
finally {
}
}
请建议我如何获取 Json 格式的多列数据，如下所示
Please suggest me how to approach to get multiple columns data in Json format as shown below
提前致谢...希望今天任何人都能让我开心:)
A BIG Thank you in advance... Hoping anyone can make my day today :)
推荐答案
我也遇到过这种情况.您只需使用第二张表中的字段创建一个类.例如:
I too faced this type of scenario. You Just create A class with the fields which you having in the second sheet. For ex:
public class Somename{
private String abc;
private String xyz;
// getters and setters
}
在你的 pojo 类中定义一个数组
In your pojo class define an array
private Somename some[];
转到 exceltoJson 转换器类.尝试创建哈希映射并在该表中获取您需要的详细信息.就这样...
Goto exceltoJson converter class.Try to create Hash map and fetch the details which u need in that sheet. That's it...
public static Map getImgs(HSSFWorkbook wb) {
Map hm1 = new HashMap<String, ArrayList<Somename>>();
HSSFSheet sheet = wb.getSheetAt(2);
Iterator<Row> iterator= sheet.iterator();
ArrayList<Somename> al = new ArrayList<Somename>();
while (iterator.hasNext()) {
Row row = iterator.next();
String sno = new DataFormatter().formatCellValue(row.getCell(0));
if (hm1.get(sno) == null) {
hm1.put(sno, new ArrayList());
}
String some= new DataFormatter().formatCellValue(row
.getCell(1));
Somename img1 = new Somename(some);
System.out.println(img1);
ArrayList r = (ArrayList) hm1.get(sno);
r.add(img1);
}
return hm1;
}
然后添加这个uploadXLS，
Then add this uploadXLS,
ArrayList<Somename> al = (ArrayList<Somename>) hm1.get(id_prod);
Somename[] ar = new Images[al.size()];
products.setSome(al.toArray(imgfar));
也许这会对你有所帮助.
May be this will help you.
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