嵌套JSON动态数据转换为xls或csv文件
我有一个JSON文件，我需要将其转换为excel或csv文件。
JSON文件：
{
"gstin": "37AAACGJSJOSFF",
"fp": "032018",
"b2b": [
{
"ctin": "33ASADKSDMK",
"cfs": "Y",
"cname": null,
"inv": [
{
"itms": [
{
"num": 500,
"itm_det": {
"csamt": 0,
"rt\n": 5,
"txval": 0,
"iamt": 0
}
}
],
"val": 87004,
"inv_typ": "R",
"pos": "37",
"idt": "31-03-2018",
"rchrg": "Y",
"inum": "S78",
"chksum": "13e230e9ednaskdjslsd23ea83a50cafbf675a111b"
}
]
},
{
"ctin": "37ADJKSKSF';DF",
"cfs": "Y",
"cname": null,
"inv": [
{
"itms": [
{
"num": 1,
"itm_det": {
"csamt": 0,
"samt": 3092.64,
"rt": 18,
"txval": 34362.7,
"camt": 3092.64
}
}
],
"val": 40548,
"inv_typ": "R",
"pos": "37",
"idt": "05-03-2018",
"rchrg": "N",
"inum": "200/AASDS/IKJO/RSJ",
"chksum": "66395159aac02dfe3dfadkjasdlkbbafde86c9e27aa0fb1605ebbe"
},
{
"itms": [
{
"num": 1,
"itm_det": {
"csamt": 0,
"samt": 68429.97,
"rt": 18,
"txval": 760332.99,
"camt": 68429.97
}
}
],
"val": 897193,
"inv_typ": "R",
"pos": "37",
"idt": "03-03-2018",
"rchrg": "N",
"inum": "235/HSLFA/IASDKC/DSKF",
"chksum": "8b60e669ee6156e0ajhaf42e4189aabbb57245127c4e609d8e"
},
{
"itms": [
{
"num": 1,
"itm_det": {
"csamt": 0,
"samt": 84846.74,
"rt": 18,
"txval": 942741.6,
"camt": 84846.74
}
}
],
"val": 1114535,
"inv_typ": "R",
"pos": "37",
"idt": "03-03-2018",
"rchrg": "N",
"inum": "236/HNSsdkfs/IsdkdC/Vsdkj",
"chksum": "eb5110c0047adsdsd63cfedc686e3e84c9a5d9c126cb96d99645"
},
{
"itms": [
{
"num": 1,
"itm_det": {
"csamt": 0,
"samt": 348.13,
"rt": 18,
"txval": 8312.57,
"camt": 648.13
}
}
],
"val": 452609,
"inv_typ": "R",
"pos": "37",
"idt": "03-03-2018",
"rchrg": "N",
"inum": "237/HNSdf/Isdxf/Rdf",
"chksum": "8181aa8d52d4c9d58csdsf915e0f4955e48c59f57f21d799f51e117c6"
},
{
"itms": [
{
"num": 1,
"itm_det": {
"csamt": 0,
"samt": 68429.97,
"rt": 18,
"txval": 760333,
"camt": 68429.97
}
}
],
"val": 897193,
"inv_typ": "R",
"pos": "37",
"idt": "31-03-2018",
"rchrg": "N",
"inum": "269/HNSSA/IsfsfC/Kdf",
"chksum": "2a46181337bdgdg88cbdfec8f3322718f029fd9d8d96e3481"
},
{
"itms": [
{
"num": 1,
"itm_det": {
"csamt": 0,
"samt": 94438.83,
"rt": 18,
"txval": 1049320.3,
"camt": 94438.83
}
}
],
"val": 1238198,
"inv_typ": "R",
"pos": "37",
"idt": "31-03-2018",
"rchrg": "N",
"inum": "271/HNSSA/Isfsf/Vada",
"chksum": "be96bd7d39b4773e599dd5sfsf1b0cad152092777271590a76f8dcb6f"
},
{
"itms": [
{
"num": 1,
"itm_det": {
"csamt": 0,
"samt": 37297.41,
"rt": 18,
"txval": 414415.71,
"camt": 37297.41
}
}
],
"val": 489011,
"inv_typ": "R",
"pos": "37",
"idt": "31-03-2018",
"rchrg": "N",
"inum": "272/HNSSA/Isdfs/RsfJ",
"chksum": "684604977sdfsf304sfdsf12e3d82bee08705b675d5ccacad546"
},
{
"itms": [
{
"num": 1,
"itm_det": {
"csamt": 0,
"samt": 283.99,
"rt": 18,
"txval": 3155.42,
"camt": 283.99
}
}
],
"val": 3723,
"inv_typ": "R",
"pos": "37",
"idt": "03-03-2018",
"rchrg": "N",
"inum": "286/HsfdS/Isfs/Kadd",
"chksum": "ef28779994414cf8sfsf7797bff799b5c9dda1f29a21cdb89112f2a843"
}
]
}
]
}
输出为：
我的方法：
我使用简单的JSON jar解析数据，并尝试通过考虑三种情况JSON对象或JSON数组或一个String来写入值，而我正通过这种方式将其写入csv文件列，我面临的问题是数据是动态的，因此在inv下位于itms_det下int下inv的第一个对象的b2b数据中，只有四行，因此在第二个对象中我有5行，因此在我的输出中，如果您在第一行中观察到b2b__inv__itms__itm_det__samt下没有值，那是因为第一个对象没有没有该字段，所以我面临着生成csv文件头并将其相应放置的问题。是否有其他替代方法可以在java中做到这一点，也没有其他方法也可以，欢迎任何建议或帮助。
我的代码：
package json2csvdynamic;
import com.sun.xml.internal.ws.util.StringUtils;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Iterator;
import org.apache.commons.io.FileUtils;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.json.CDL;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
/**
*
* @author 00511175
*/
public class Json2csvdynamic {
HSSFWorkbook workBook = new HSSFWorkbook();
HSSFSheet sheet = workBook.createSheet();
HSSFRow row;
int i;
public int col;
public HSSFRow getRow() {
return row;
}
public void setRow(HSSFRow row) {
this.row = row;
}
public int getI() {
return i;
}
public void setI(int i) {
this.i = i;
}
/**
* @param args the command line arguments
*/
public void excelproccessing(ArrayList arr, HSSFSheet sheet, String prev_key) {
if (col < 20) {
int j = 0;
for (i = 0; i < arr.size(); i++) {
// if (col != 0) {
// jsexcel.row = jsexcel.sheet.getRow(0);
// jsexcel.row = jsexcel.sheet.getRow(1);
// }
row = sheet.getRow(j);
if (row == null) {
sheet.createRow(j);
row = sheet.getRow(j);
}
if (i == 0) {
if (prev_key.equalsIgnoreCase("") || prev_key.equals(null)) {
row.createCell(col).setCellValue((String) arr.get(i));
} else {
row.createCell(col).setCellValue(prev_key);
}
} else {
row.createCell(col).setCellValue((String) arr.get(i));
}
j++;
}
col = col + 1;
// System.out.println("a::" + a);
}
}
public void arrayexcelprocessing(org.json.simple.JSONArray jsonarr, HSSFSheet sheet, String prev_key) {
int j = 0;
for (i = 0; i < jsonarr.size(); i++) {
// row = sheet.getRow(j);
// if (row == null) {
// sheet.createRow(j);
// row = sheet.getRow(j);
// }
//// row.createCell(col).setCellValue(jsonarr.get(i).toString());
// j++;
org.json.simple.JSONObject jsonObject = (org.json.simple.JSONObject) jsonarr.get(i);
for (Iterator iterator = jsonObject.keySet().iterator();
iterator.hasNext();) {
String key = (String) iterator.next();
System.out.println("the level2 keys" + key);
Object obj = jsonObject.get(key);
if (obj instanceof JSONArray) {
org.json.simple.JSONArray jsonarr1 = (org.json.simple.JSONArray) obj;
arrayexcelprocessing(jsonarr1, sheet, prev_key.concat("/").concat(key));
} else if (obj instanceof JSONObject) {
for (iterator = ((org.json.simple.JSONObject) obj).keySet().iterator();
iterator.hasNext();) {
String key1 = (String) iterator.next();
Object obj1 = ((org.json.simple.JSONObject) obj).get(key1);
ArrayList<String> arr = new ArrayList<String>();
// String FileName = "json.csv";
arr.add(key1);
arr.add(String.valueOf(obj1));
if (col < 20) {
excelproccessing(arr, sheet, prev_key.concat("/").concat(key1));
}
}
System.out.println("obj" + obj.toString());
} else {
ArrayList<String> arr = new ArrayList<String>();
// String FileName = "json.csv";
arr.add(key);
arr.add(String.valueOf(obj));
if (col < 20) {
excelproccessing(arr, sheet, prev_key.concat("/").concat(key));
}
}
}
}
}
public static void main(String[] args) throws IOException, ParseException {
Json2csvdynamic jsexcel = new Json2csvdynamic();
JSONParser parser = new JSONParser();
org.json.simple.JSONObject jsonObject = (org.json.simple.JSONObject) parser.parse(new FileReader("C:\\Users\\workspace\\json2csv\\test.json"));
for (Iterator iterator = jsonObject.keySet().iterator();
iterator.hasNext();) {
String key = (String) iterator.next();
System.out.println("the level1 keys" + key);
Object obj = jsonObject.get(key);
if (obj instanceof JSONArray) {
org.json.simple.JSONArray jsonarr = (org.json.simple.JSONArray) obj;
jsexcel.arrayexcelprocessing(jsonarr, jsexcel.sheet, key);
} else if (obj instanceof JSONObject) {
org.json.simple.JSONObject jo = (org.json.simple.JSONObject) obj;
} else {
ArrayList<String> arr = new ArrayList<String>();
// String FileName = "json.csv";
arr.add(key);
arr.add((String) obj);
jsexcel.excelproccessing(arr, jsexcel.sheet, "");
}
}
FileOutputStream out
= new FileOutputStream(new File("C:\\Users\\workspace\\json2csv\\test.xls"));
jsexcel.workBook.write(out);
out.close();
}
}
0 个答案:
没有答案
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