Here I have a excel file named Merged.xlsx. The figure of this is as:-
and I want this data to be displayed in a JSON format as:-
{
"Cars":[
{"SellerName":"govinda lamgade","Seller Address":"-Dallu,Kathmandu",...},
],
"Motorcycle":[
{Same as above},
]
}
So far I have got the result as
{"rows":[{"cell":["Skoda Rapid On Sale And Exchange"," govinda lamgade ","- Dallu, Kathmandu","19-06-2020",1450000.0,"https://cdn.hamrobazaar.com/21...
which is not the one that I wanted. The code is as:-
String excelFilePath = "E:\\Merged.xlsx";
FileInputStream fileInputStream = new FileInputStream(excelFilePath);
Workbook workbook = new XSSFWorkbook(fileInputStream);
Sheet sheet = workbook.getSheetAt(0);
JsonObject jsonObject = new JsonObject();
JsonArray rows = new JsonArray();
Iterator<Row> rowIterator = sheet.iterator();
while(rowIterator.hasNext()){
Row row = rowIterator.next();
if(row.getRowNum() == 0) {
continue;
}
else{
JsonObject jRow = new JsonObject();
JsonArray cells = new JsonArray();
Iterator<Cell> cellIterator = row.cellIterator();
while (cellIterator.hasNext()) {
Cell cell = cellIterator.next();
switch (cell.getCellType()) {
case Cell.CELL_TYPE_NUMERIC:
cells.add(cell.getNumericCellValue());
break;
case Cell.CELL_TYPE_STRING:
cells.add(cell.getStringCellValue());
break;
}
jRow.add("cell",cells);
rows.add(jRow);
}
jsonObject.add("rows", rows);
}
System.out.println(jsonObject.toString());
fileInputStream.close();
}
}
}
Thank You
You can do this as follows;
Assumptions:
Important:
You have to give the expected json key
for each json value
as the column name in the excel sheet (eg:- put sellerName
as column name instead of Seller Name in the excel file)
Required imports;
import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import java.util.*;
You should get Cell data and put to a HashMap and then convert the HashMap to a JsonElement
;
String excelFilePath = "E:\\Merged.xlsx";
FileInputStream fileInputStream = new FileInputStream(excelFilePath);
Workbook workbook = new XSSFWorkbook(fileInputStream);
Sheet sheet = workbook.getSheetAt(0);
JsonArray carArray = new JsonArray();
List<String> columnNames = new ArrayList<>();
Gson gson = new Gson();
// Get column names
Row row = sheet.getRow(0);
for (Iterator<Cell> it = row.cellIterator(); it.hasNext(); ) {
Cell cell = it.next();
columnNames.add(cell.getStringCellValue());
}
Iterator<Row> rowIterator = sheet.iterator();
while (rowIterator.hasNext()) {
row = rowIterator.next();
if (row.getRowNum()==0) {
continue;
}
Iterator<String> columnNameIterator = columnNames.iterator();
Iterator<Cell> cellIterator = row.cellIterator();
// Create a new map for the row
Map<String, Object> newCarMap = new HashMap<>();
while (cellIterator.hasNext()) {
Cell cell = cellIterator.next();
String columnName = columnNameIterator.next();
switch (cell.getCellType()) {
case Cell.CELL_TYPE_NUMERIC:
newCarMap.put(columnName, cell.getNumericCellValue());
break;
case Cell.CELL_TYPE_STRING:
newCarMap.put(columnName, cell.getStringCellValue());
break;
}
}
// Convert the map to `JsonElement`
JsonElement carJson = gson.toJsonTree(newCarMap);
// Add the `JsonElement` to `JsonArray`
carArray.add(carJson);
}
// Add the `JsonArray` to `completeJson` object with the key as `Cars`
JsonObject completeJson = new JsonObject();
completeJson.add("Cars", carArray);
If you print the completeJson
;
{
"Cars": [
{
"price": 111111,
"imageUrl": "https://example_url_1",
"sellerAddress": "address_1",
"sellerName": "name_1",
"date": "12-07-2020"
},
{
"price": 222222,
"imageUrl": "https://example_url_2",
"sellerAddress": "address_2",
"sellerName": "name_2",
"date": "19-06-2020"
}
// rest of the car json objects will come here
]
}
Like wise you can create the Motorcycle
json array. When adding MotorCycle JsonArray
to completeJson, put the key as Motorcycle
(or the key you prefer)
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