java 讀取excel文件轉換成json格式

需要讀取excel數據轉換成json數據，寫了個測試功能，轉換正常：

引用大神的文章：https://www.cnblogs.com/hhhshct/p/7255915.html

JSON轉換：org.json.jar

  測試類：  importFile.java:

package com.siemens.util;

import java.util.ArrayList;
import java.util.List;
import org.json.JSONException;
import org.json.JSONObject;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;

//import com.siemens.entity.master;
//import com.siemens.service.masterService;
//import com.siemens.serviceImpl.masterServiceImpl;
//import com.siemens.serviceImpl.webServiceImpl;

public class importFile {
	public static void main(String[] args) throws JSONException{
//		master masters = new master();
//		ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
//		masterService ms = (masterService)ac.getBean("masterservice");
		 Workbook wb =null;
	        Sheet sheet = null;
	        Row row = null;
	        String cellData = null;
	        //文件路徑，
	        String filePath = "f:/haoxy/Worktable222.xls";

	        wb =EXCELBean.readExcel(filePath);
	        
	        if(wb != null){
	            //用來存放表中數據
	            List<JSONObject> listMap = new ArrayList<JSONObject>();
	            //獲取第一個sheet
	            sheet = wb.getSheetAt(0);
	            //獲取最大行數
	            int rownum = sheet.getPhysicalNumberOfRows();
	            //獲取第一行
	            row = sheet.getRow(0);
	            //獲取最大列數
	            int colnum = row.getPhysicalNumberOfCells();
	            //這裏創建json對象，實測用map的話，json數據會有問題 
	            JSONObject jsonMap = new JSONObject();
	            //循環行
	            for (int i = 1; i < rownum; i++) {
	                row = sheet.getRow(i);
	                if(row !=null){
	                	//創建list對象接收讀出的excel數據
	                	List<String> list = new ArrayList<String>();
	                	//循環列
	                    for (int j=0;j<colnum;j++){
	                        cellData = (String) EXCELBean.getCellFormatValue(row.getCell(j));
	                        list.add(cellData);
	                    }
	                    //System.out.println(list.get(59));

	                    	//下面具體是本人對數據按需求進行格式處理     ---創建json對象會報異常，捕捉一下。
							JSONObject jsonObject2 = new JSONObject();
								jsonObject2.put("skvDorCode",list.get(0));
								jsonObject2.put("description", list.get(1));
								jsonObject2.put("discipline", list.get(2));
								jsonObject2.put("prefabricatedSkids", list.get(3));
								jsonObject2.put("onRack", list.get(4));
								jsonObject2.put("offRack", list.get(5));
								jsonObject2.put("yard", list.get(6)); 
								jsonObject2.put("hsrg", list.get(7));
							
								JSONObject jsonPptData = new JSONObject();
								jsonPptData.put("SC FF",list.get(8));
								jsonPptData.put("CC SS CT",list.get(9));
								jsonPptData.put("CC SS OCC",list.get(10));
								jsonPptData.put("CC SS ACC",list.get(11));
								jsonPptData.put("CC MS CT",list.get(12));
								jsonPptData.put("CC MS OCC",list.get(13));
								jsonPptData.put("CC MS ACC",list.get(14));
								
								//turnkey
								JSONObject jsonTurnkey = new JSONObject();
								jsonTurnkey.put("plantDesign", list.get(26));
								jsonTurnkey.put("basicDesign", list.get(27));
								jsonTurnkey.put("detailDesign", list.get(28));
								jsonTurnkey.put("supplier", list.get(29));
								jsonTurnkey.put("errection", list.get(30));
								jsonTurnkey.put("commissioning", list.get(31));
								jsonTurnkey.put("blackBox", list.get(32));
								jsonTurnkey.put("optionalScope", list.get(33));
								jsonTurnkey.put("remark", list.get(34));
								jsonTurnkey.put("internalRemark", list.get(35));
								jsonTurnkey.put("revision", list.get(36));
								
								//PowerCore
								JSONObject jsonPowerCore = new JSONObject();
								jsonPowerCore.put("plantDesign", list.get(37));
								jsonPowerCore.put("basicDesign", list.get(38));
								jsonPowerCore.put("detailDesign", list.get(39));
								jsonPowerCore.put("supplier", list.get(40));
								jsonPowerCore.put("errection", list.get(41));
								jsonPowerCore.put("commissioning", list.get(42));
								jsonPowerCore.put("blackBox", list.get(43));
								jsonPowerCore.put("optionalScope", list.get(44));
								jsonPowerCore.put("remark", list.get(45));
								jsonPowerCore.put("internalRemark", list.get(46));
								jsonPowerCore.put("revision", list.get(47));
								
								//PowerIsland
								JSONObject jsonPowerIsland = new JSONObject();
								jsonPowerIsland.put("plantDesign", list.get(48));
								jsonPowerIsland.put("basicDesign", list.get(49));
								jsonPowerIsland.put("detailDesign", list.get(50));
								jsonPowerIsland.put("supplier", list.get(51));
								jsonPowerIsland.put("errection", list.get(52));
								jsonPowerIsland.put("commissioning", list.get(53));
								jsonPowerIsland.put("blackBox", list.get(54));
								jsonPowerIsland.put("optionalScope", list.get(55));
								jsonPowerIsland.put("remark", list.get(56));
								jsonPowerIsland.put("internalRemark", list.get(57));
								jsonPowerIsland.put("revision", list.get(58));
								
								//創建jsonBmt對象，進一步把以上對象嵌套
								JSONObject jsonBmt = new JSONObject();
								
								jsonBmt.put("Turnkey", jsonTurnkey);
								jsonBmt.put("PowerCore", jsonPowerCore);
								jsonBmt.put("PowerIsland", jsonPowerIsland);
								
								//把以上幾個嵌套入第一層對象中
								jsonObject2.put("powerPlantTypes",jsonPptData);
								jsonObject2.put("businessMixTypes",jsonBmt);
								jsonObject2.put("treeDepth",Integer.parseInt(list.get(59).substring(0,list.get(59).indexOf('.'))));
								if(Integer.parseInt(list.get(59).substring(0,list.get(59).indexOf('.')))<=2){
									List<String> list3 = new ArrayList<String>();
									list3.add("non-empty-placeholder");
									jsonObject2.put("children",list3);
								}
								listMap.add(jsonObject2);                         
	                }else{
	                    break;
	                }             
	            }// end for row
	            		//最外層加個key-gridData
			            jsonMap.put("gridData", listMap);
			            System.out.println(jsonMap);            
	        }	        
	}	
}

讀取excel 工具類，看到網友的讀取方法引用一下：

EXCELBean.java:

package com.siemens.util;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class EXCELBean {
	//讀取excel
    public static Workbook readExcel(String filePath){
        Workbook wb = null;
        if(filePath==null){
            return null;
        }
        String extString = filePath.substring(filePath.lastIndexOf("."));
        InputStream is = null;
        try {
            is = new FileInputStream(filePath);
            if(".xls".equals(extString)){
                return wb = new HSSFWorkbook(is);
            }else if(".xlsx".equals(extString)){
                return wb = new XSSFWorkbook(is);
            }else{
                return wb = null;
            }
            
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return wb;
    }
    public static Object getCellFormatValue(Cell cell){
        Object cellValue = null;
        if(cell!=null){
            //判斷cell類型
            switch(cell.getCellType()){
            case Cell.CELL_TYPE_NUMERIC:{
                cellValue = String.valueOf(cell.getNumericCellValue());
                break;
            }
            case Cell.CELL_TYPE_FORMULA:{
                //判斷cell是否爲日期格式
                if(DateUtil.isCellDateFormatted(cell)){
                    //轉換爲日期格式YYYY-mm-dd
                    cellValue = cell.getDateCellValue();
                }else{
                    //數字
                    cellValue = String.valueOf(cell.getNumericCellValue());
                }
                break;
            }
            case Cell.CELL_TYPE_STRING:{
                cellValue = cell.getRichStringCellValue().getString();
                break;
            }
            default:
                cellValue = "";
            }
        }else{
            cellValue = "";
        }
        return cellValue;
    }

}