正则表达式Java拆分逗号分隔的字符串但忽略引号+大括号+递归括号内的逗号

Question

我有一个像这样的字符串行：

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"}

我想用逗号分割

上面的字符串应该拆分为：

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"}

试试看，但它分裂得不好。

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

我怎样才能做到这一点？

Answer 1

您可以使用更简单的方法将 split 与 ",{" 作为分隔符。

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

结果如下：

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号{

Answer 2

而不是拆分尝试使用模式匹配器提取数据。

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]);

结果输出：

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"}