java - 无法按照我想要的方式拆分字符串

Question

在我的 Java 应用程序中，我有一个很长的 JSON 字符串，其中包含我要提取的数据。

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我想提取的是这种形式下字符串的对象部分(括号之间) "56":["81",3,"0","","","", "","0","","4754","M",1] 并从中获取所有这些数据:"81",3,"0","","""","","0","","4754","M",1 并能够访问他们的号码。

为此我试过这个:

for(int i = 1; i > 0; i++) {
    String d;
    try {
        d = data.split("\"" + i + "\"\\:\\[")[1];
        d = d.split("\\]")[0];
    } catch(Exception e) {
        e.printStackTrace();
        System.out.println("quit");
        break;
    }
}

问题是我得到一个数组越界异常，并从此 data.split("\""+ i + "\"\\:\\[")[")[1] 。我的猜测是我搞砸了正则表达式，但我真的看不出在哪里。感谢您的帮助。

Answer 1

最好使用 JSON Java 库。它真的会为你简化解析。下面是一个示例，说明如何提取所需的最后一个数组并将其所有值打印到控制台。

final JSONArray root = new JSONArray(YOUR_JSON_STRING);

final JSONObject numData = root.getJSONObject(1);
final JSONArray numArray = numData.getJSONArray("56");

for (int i = 0; i < numArray.length(); ++i) {
  if (i == 1 || i == 11)
      System.out.print(numArray.getInt(i)+",");
  else
      System.out.print(numArray.getString(i)+",");
}
// prints: "81",3,"0","","","","","0","","4754","M",1,

引用:
JSON Java API docs