我想阅读excel文件（.xls，.xlsx）并将其转换为JSON格式并保存。 这是一个代码，使我能够从excel文件中读取数据，但我无法获得如何以JSON格式放置数据。 任何人都可以帮助我。
public class ReadExcelFile {
private static XSSFWorkbook mybook;
static String fileLocation = "D://Traniee-SPG//Book1.xlsx";
public static void main(String[] args){
try{
File newFile = new File(fileLocation);
FileInputStream fIO = new FileInputStream(newFile);
mybook = new XSSFWorkbook(fIO); //finds the Excelfile
XSSFSheet mySheet = mybook.getSheetAt(0);// Return first sheet from the XLSX workbook
Iterator<Row> rowIterator = mySheet.iterator(); //create a cursor called iterator to all rows in sheet
Row r;
Cell c;
//to travel into the Excel spreadsheet
while(rowIterator.hasNext()) {
r = rowIterator.next();
//Cursor points to row
Iterator<Cell> cell_Iterator = r.cellIterator();
while(cell_Iterator.hasNext()) {
c = cell_Iterator.next();
//Cursor points to cell
switch (c.getCellType()) {
case Cell.CELL_TYPE_STRING:
System.out.print(c.getStringCellValue()+"\t");
//System.out.println("Case String");
break;
case Cell.CELL_TYPE_NUMERIC:
System.out.print(c.getNumericCellValue()+"\t");
//System.out.println("Case number");
break;
case Cell.CELL_TYPE_BOOLEAN:
System.out.print(c.getBooleanCellValue()+"\t");
System.out.println("Case boolean");
break;
case Cell.CELL_TYPE_FORMULA:
System.out.print(c.getCellFormula()+"\t");
//System.out.println("Case formula");
break;
default:
}
}
System.out.println(" ");//next to display in table format
}
mybook.close();
fIO.close();
}
catch(FileNotFoundException ef){
ef.printStackTrace();
}
catch(IOException ei){
ei.printStackTrace();
}
}
}
答案 0 :(得分：2)
使用Gson给出的事实是每张纸的第一行是列名：
public static JsonObject getExcelDataAsJsonObject(File excelFile) {
JsonObject sheetsJsonObject = new JsonObject();
Workbook workbook = null;
try {
workbook = new XSSFWorkbook(excelFile);
} catch (InvalidFormatException | IOException e) {
TestLogUtils.logErrorMessage(
"ExcelUtils -> getExcelDataAsJsonObject() :: Exception thrown constructing XSSFWorkbook from provided excel file. InvalidFormatException | IOException => "
+ TestLogUtils.convertStackTraceToString(e));
}
for (int i = 0; i < workbook.getNumberOfSheets(); i++) {
JsonArray sheetArray = new JsonArray();
ArrayList<String> columnNames = new ArrayList<String>();
Sheet sheet = workbook.getSheetAt(i);
Iterator<Row> sheetIterator = sheet.iterator();
while (sheetIterator.hasNext()) {
Row currentRow = sheetIterator.next();
JsonObject jsonObject = new JsonObject();
if (currentRow.getRowNum() != 0) {
for (int j = 0; j < columnNames.size(); j++) {
if (currentRow.getCell(j) != null) {
if (currentRow.getCell(j).getCellTypeEnum() == CellType.STRING) {
jsonObject.addProperty(columnNames.get(j), currentRow.getCell(j).getStringCellValue());
} else if (currentRow.getCell(j).getCellTypeEnum() == CellType.NUMERIC) {
jsonObject.addProperty(columnNames.get(j), currentRow.getCell(j).getNumericCellValue());
} else if (currentRow.getCell(j).getCellTypeEnum() == CellType.BOOLEAN) {
jsonObject.addProperty(columnNames.get(j), currentRow.getCell(j).getBooleanCellValue());
} else if (currentRow.getCell(j).getCellTypeEnum() == CellType.BLANK) {
jsonObject.addProperty(columnNames.get(j), "");
}
} else {
jsonObject.addProperty(columnNames.get(j), "");
}
}
sheetArray.add(jsonObject);
} else {
// store column names
for (int k = 0; k < currentRow.getPhysicalNumberOfCells(); k++) {
columnNames.add(currentRow.getCell(k).getStringCellValue());
}
}
}
sheetsJsonObject.add(workbook.getSheetName(i), sheetArray);
}
return sheetsJsonObject;
}
答案 1 :(得分：1)
如果要查找简单的在线转换工具，请使用以下命令： http://www.convertcsv.com/csv-to-json.htm
或者以编程方式执行此操作： https://github.com/nullpunkt/excel-to-json/blob/master/src/main/java/net/nullpunkt/exceljson/convert/ExcelToJsonConverter.java
答案 2 :(得分：0)
package com.core.util;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.sling.commons.json.JSONException;
import org.apache.sling.commons.json.JSONcellValuesect;
import org.json.simple.JSONArray;
import com.PojoClassName;
public class ReadExcelUtil {
//create pojo class based on excel sheet columns
public static List<PojoClassName> readAssetExcel(
final InputStream inputStream) {
List<PojoClassName> cellValues = new ArrayList<PojoClassName>();
XSSFWorkbook workbook;
try {
workbook = new XSSFWorkbook(inputStream);
XSSFSheet sheet = workbook.getSheetAt(0);
cellValues = damcellValues(sheet, cellValues);
return cellValues;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return cellValues;
}
private static List<PojoClassName> damcellValues(XSSFSheet sheet,
List<PojoClassName> cellValues) {
int num = sheet.getPhysicalNumberOfRows();
for (int i = 1; i <= num; i++) {
Row column = sheet.getRow(i);
if (column.getCell(0) == null) {
break;
}
PojoClassName object = new PojoClassName();
String str1 = column.getCell(0).getStringCellValue();
object.setDamPath(str1);
String str2 = column.getCell(1).getStringCellValue();
object.setServerUrl(str2);
String str3 = column.getCell(2).getStringCellValue();
object.setAssetTitle(str3);
String str4 = column.getCell(3).getStringCellValue();
object.setAssetDescription(str4);
String str5 = column.getCell(4).getStringCellValue();
object.setSourceId(str5);
cellValues.add(object);
}
return cellValues;
}
//you can use below method to convert the List into Json
public static String getJsonFromMyFormObject(List<DamAssetDetails> obj) throws JSONException{
JSONArray jsonArray = new JSONArray();
for (int i = 0; i < obj.size(); i++)`enter code here`
{
JSONObject formDetailsJson = new JSONObject();
formDetailsJson.put("key1", obj.get(i).getDamPath());
formDetailsJson.put("key2", obj.get(i).getServerUrl());
formDetailsJson.put("key3", obj.get(i).getAssetTitle());
formDetailsJson.put("key4", obj.get(i).getAssetDescription());
formDetailsJson.put("key5", obj.get(i).getSourceId());
jsonArray.add(formDetailsJson);
}
//responseDetailsJson.put("obj", jsonArray);
return jsonArray.toJSONString();
}
}
答案 3 :(得分：0)
public static String ExcelReader(String filePath, int index) throws IOException {
List<String> list = new ArrayList<String>();
try {
FileInputStream excelFile = new FileInputStream(filePath);
Workbook workbook = new XSSFWorkbook(excelFile);
Sheet datatypeSheet = workbook.getSheetAt(index);
XSSFRow row = (XSSFRow) datatypeSheet.getRow(0);
String TC_ID = String.valueOf(row.getCell(0));
String TS_ID = String.valueOf(row.getCell(1));
String Test_Steps = String.valueOf(row.getCell(2));
String Execution_Flag = String.valueOf(row.getCell(3));
String IdentifierType = String.valueOf(row.getCell(4));
String IdentifierValue = String.valueOf(row.getCell(5));
String Action_Keyword = String.valueOf(row.getCell(6));
String Dataset = String.valueOf(row.getCell(7));
for (int rowNumber = 1; rowNumber <= datatypeSheet.getLastRowNum(); rowNumber++) {
list.add(jsonObject.toString());
XSSFRow row1 = (XSSFRow) datatypeSheet.getRow(rowNumber);
for (int columnNumber = 0; columnNumber < row.getLastCellNum(); columnNumber++) {
String cell = String.valueOf(row1.getCell(columnNumber));
if (cell != null) {
switch (columnNumber) {
case 0:
jsonObject.addProperty(*** cell);
break;
case 1:
jsonObject.addProperty(**, cell);
break;
case 2:
jsonObject.addProperty(**, cell);
break;
}
}
Gson gson = new GsonBuilder().setPrettyPrinting().create();
json = gson.toJson(jsonObject);
System.out.print(json);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return jsonObject.toString();
}
}
答案 4 :(得分：-1)
请参考以下代码，将Excel转换为Json- 还处理了多张工作表，并逐行读取excel工作表值（第一行被视为键，其余行是json格式的值）示例输入和输出在此处inputFile-Sheet1附加 inputFile-Sheet2 output jsonobject。
公共类ExcelToJsonConvertor {
private JSONObject readExcelFileAsJsonObject_RowWise(String filePath) {
DataFormatter dataFormatter = new DataFormatter();
JSONObject workbookJson = new JSONObject();
JSONArray sheetJson = new JSONArray();
JSONObject rowJson = new JSONObject();
try {
FileInputStream excelFile = new FileInputStream(new File(filePath));
Workbook workbook = new XSSFWorkbook(excelFile);
FormulaEvaluator formulaEvaluator = new XSSFFormulaEvaluator((XSSFWorkbook) workbook);
for (Sheet sheet : workbook) {
sheetJson = new JSONArray();
int lastRowNum = sheet.getLastRowNum();
int lastColumnNum = sheet.getRow(0).getLastCellNum();
Row firstRowAsKeys = sheet.getRow(0); // first row as a json keys
for (int i = 1; i <= lastRowNum; i++) {
rowJson = new JSONObject();
Row row = sheet.getRow(i);
if (row != null) {
for (int j = 0; j < lastColumnNum; j++) {
formulaEvaluator.evaluate(row.getCell(j));
rowJson.put(firstRowAsKeys.getCell(j).getStringCellValue(),
dataFormatter.formatCellValue(row.getCell(j), formulaEvaluator));
}
sheetJson.add(rowJson);
}
}
workbookJson.put(sheet.getSheetName(), sheetJson);
}
} catch (Exception e) {
e.printStackTrace();
}
return workbookJson;
}
public static void main(String arg[]) {
ExcelToJsonConvertor excelConvertor = new ExcelToJsonConvertor();
String filePath = "C:\\Users\\username\\Documents\\WorkInputFiles\\InputSheet.xlsx";
JSONObject data = excelConvertor.readExcelFileAsJsonObject_RowWise(filePath);
System.out.println(data);
}
}
需要Maven依赖项- json-simple，apache.poi，poi-ooxml