如何将Java数组字符串写入Json文件

huangapple
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英文:

How to write Java Array string to Json File

问题

以下是您的代码翻译结果：

  1. String Stringtojson = Concstring;
  3. JSONParser parser = new JSONParser();
  4. try {
  5.     Object object = parser.parse(Stringtojson);
  6.     
  7.     // 将 Object 转换为 JSONObject
  8.     JSONObject jsonObject3 = (JSONObject) object;
  9.     try {
  10.         FileWriter file = new FileWriter("F:\\myjson.json");
  11.         file.write(jsonObject3.toJSONString());
  12.         file.close();
  13.     } catch (IOException e) {
  14.         e.printStackTrace();
  15.     }
  17. } catch (Exception e) {
  18.     e.printStackTrace();
  19. }

请注意，由于您要求只返回翻译好的部分，我已将翻译结果放在代码块中，原始文本中的 HTML 实体引用（如 "）已被正常翻译成双引号。

英文:

I have Java string and would like to parse it to JSON file. I first try to parse the string to an Object then to Json Object. The java string contains array/list of 2 elements. I would want to maintain that structure since its submitted to an API in that form.

Content of my String looks as below:

  1. [
  2.       { "foedselsdato" : "2012-04-29",
  3.         "individId" : "052804211084",
  4.         "undergruppe" : "KU",
  5.         "varslinger" :
  6.         { "medisinering" :
  7.           [
  8.             { "merknad" : "",
  9.               "preparat" : "11 Mastipen vet Intramammarie 300 mg\/sprøyte",
  10.               "tilbakeholdelsesdato" : "2020-08-25" },
  12.             { "merknad" : "",
  13.               "preparat" : "11 Penovet vet Inj væske, susp 300 mg\/ml",
  14.               "tilbakeholdelsesdato" : "2020-08-25" } ] } },
  16.       { "foedselsdato" : "2017-05-19",
  17.         "individId" : "052820651335",
  18.         "undergruppe" : "KU",
  19.         "varslinger" :
  20.         { "helsetilstand" :
  21.           [
  22.             { "merknad" : "Ole test",
  23.               "tilstand" : "SVAK_HALTHET",
  24.               "tiltak" : "EKSTRA_STROE" } ] } } ]

Below is my code:

  1. String Stringtojson =  Concstring;
  3. JSONParser parser = new JSONParser();
  4. try
  5. {
  6.     Object object = parser.parse(Stringtojson);
  7.     
  8.     //convert Object to JSONObject
  9.     JSONObject jsonObject3 = (JSONObject)object;
  10.     try {
  11.         FileWriter file = new FileWriter("F:\myjson.json");
  12.         file.write(jsonObject3.toJSONString());
  13.         file.close();
  14.         } catch (IOException e) {                                        
  15.         e.printStackTrace();
  16.         }
  17.     
  19. }
  20. catch(Exception e)
  21. {
  22.     e.printStackTrace();
  23. }

答案1

得分: 1

  1. `Object object = parser.parse(Stringtojson);` 这行代码实际上将您的字符串转换为一个 `JSONArray`。原因是外部的数组括号（即"["和"]"）。将 `JSONArray` 强制转换为 `JSONObject` 导致崩溃（`JSONObject jsonObject3 = (JSONObject)object;`）
  3. 您基本上有两个选项：
  4. 1) 将 `JSONObject jsonObject3 = (JSONObject)object;` 这行替换为 `JSONArray jsonObject3 = (JSONArray)object;`。然后文件的内容将完全是您的字符串（并且它将是一个有效的 JSON 文件）。
  6. 2) 将外部的 `[` 替换为 `{ "root": [`，将 `]` 替换为 `] }`。这将把您的 JSONArray 转换为 JSONObject。
  8. 总的来说，这涉及到 JSONObject 和 "[]" 定义的差异（因为它本质上是元素列表），以及 JSONArray 和 "{}" 定义的差异，它类似于字典（即您有键和值）。
英文:

The line Object object = parser.parse(Stringtojson); actually converts your string into an JSONArray. The reason are the outer array brackets (i.e. "[" and "]"). Casting a JSONArray to a JSONObject causes the crash (JSONObject jsonObject3 = (JSONObject)object;)

You have essentially two options:

  1. Replace the line JSONObject jsonObject3 = (JSONObject)object; with JSONArray jsonObject3 = (JSONArray)object;. Then the content of the file would be exactly your string (and it would be a valid JSON file).

  2. Replace the outter [ with { "root": [ and ] with ] }. This would turn your JSONArray into a JSONObject.

In general, this is all about the difference between a JSONObject which is defined by "[]" (as it is essentially a list of elements) and a JSONArray which is defined by "{}" and is comparable to a dictionary (i.e. you have keys and values).

答案2

得分: 0

  1. String Stringtojson =  Concstring;
  3. JSONParser parser = new JSONParser();
  4. try
  5. {
  6.     Object object = parser.parse(Stringtojson);
  8.     //convert Object to JSONObject
  9.     JSONArray jsonObject3 = (JSONArray)object;
  10.     try {
  11.         FileWriter file = new FileWriter(resultDir);
  12.         file.write(jsonObject3.toString());
  13.         file.close();
  14.      } catch (IOException e) {                                        
  15.         e.printStackTrace();
  16.      }
  19. }
  20. catch(Exception e)
  21. {
  22.     e.printStackTrace();
  23. }
英文: 
  1. String Stringtojson =  Concstring;
  3. JSONParser parser = new JSONParser();
  4. try
  5. {
  6.     Object object = parser.parse(Stringtojson);
  7.     
  8.     //convert Object to JSONObject
  9.     JSONArray jsonObject3 = (JSONArray)object;
  10.     try {
  11.         FileWriter file = new FileWriter(resultDir);
  12.         file.write(jsonObject3.toString());
  13.         file.close();
  14.      } catch (IOException e) {                                        
  15.         e.printStackTrace();
  16.      }
  17.     
  19. }
  20. catch(Exception e)
  21. {
  22.     e.printStackTrace();
  23. }

huangapple
  • 本文由 发表于 2020年10月23日 14:38:53
  • 转载请务必保留本文链接：https://go.coder-hub.com/64495073.html
  • java
  • json
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