正則表達式Java拆分逗號分隔的字符串但忽略引號+大括號+遞歸括號內的逗號

Question

我有一個像這樣的字符串行：

valueA,{"property1":"value1","property2":"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]","property3":"value3",.....,"propertyn":"valueN"},valueB,{"property1":"value1","property2":"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]","property3":"value3",.....,"propertyn":"valueN"},valueC,{"property1":"value1","property2":"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]","property3":"value3",.....,"propertyn":"valueN"}

我想用逗號分割

上面的字符串應該拆分為：

valueA
{"property1":"value1","property2":"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]","property3":"value3",.....,"propertyn":"valueN"}
valueB
{"property1":"value1","property2":"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]","property3":"value3",.....,"propertyn":"valueN"}
valueC
{"property1":"value1","property2":"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]","property3":"value3",.....,"propertyn":"valueN"}

試試看，但它分裂得不好。

String[] tokens = line.split(",(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)", -1);

我怎樣才能做到這一點？

Answer 1

您可以使用更簡單的方法將 split 與 ",{" 作為分隔符。

String[] tokens = line.split(",{");

結果如下：

tokens[0] = "valueA"
tokens[1] = "property1":"value1","property2":"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]","property3":"value3",.....,"propertyn":"valueN"}

所以剩下的唯一工作就是添加起始括號{

Answer 2

而不是拆分嘗試使用模式匹配器提取數據。

String line = "valueA,{\"property1\":\"value1\",\"property2\":\"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]\",\"property3\":\"value3\"},valueB,{\"property1\":\"value1\",\"property2\":\"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]\",\"property3\":\"value3\"},valueC,{\"property1\":\"value1\",\"property2\":\"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]\",\"property3\":\"value3\"}";
Pattern pattern = Pattern.compile("([,]*(value[A-Z])),(\\{\"[\\w\":,\\[\\].]+\"\\})");
Matcher matcher = pattern.matcher(line);
List<String> data = new ArrayList<>();

while (matcher.find()) {
    String key = matcher.group(2);
    String value = matcher.group(3);

    data.add(key);
    data.add(value);

    System.out.println(key);
    System.out.println(value);
}
String[] array = data.toArray(new String[0]);

結果輸出：

valueA
{"property1":"value1","property2":"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]","property3":"value3"}
valueB
{"property1":"value1","property2":"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]","property3":"value3"}
valueC
{"property1":"value1","property2":"[[[1.5,1.7],[1.9,0.7],.....,[0.5,0.9]]]","property3":"value3"}