Question

我有一个已被读取并分成3个不同的csv的csv。 CSV是通过管道分隔的，并且split变量保存在字符串变量中。我想将新字符串拆分为逗号分隔的字符串，但是一旦这样做，它就会出现异常。

try(BufferedReader br1 = new BufferedReader(new FileReader(newcsvCategory))){
    String line;
    while ((line = br1.readLine()) != null) {
        String[] value1 = line.split("\\|,",-1);
        String Id = value1[0];
        String CatId=value1[1];

["Active Catalog Detail (Network Id "|" Category Ids "]
["209"|"4900,10368,11093,11581,10082,10206,10431,10119,11622,10358,11094,2,10342,5193,10738,11744,10039,10840,5132,10011,11132,5233,10792"]
["174"|"4900,10082,10119,10358,10039,5132,10011"]
["200"|"4900,10368,11093,11581,10082,10206,10431,10119,11622,10358,11094,2,5193,10738,11623,10039,10840,5132,10011,11132,5233,10792"]
["181"|"4900,10358,10011"]
["240"|"4900,10368,11093,11581,10082,10206,10431,10119,11622,10358,11094,2,10342,5193,10738,11744,10039,10840,5132,10011,11132,5233,10792"]
["206"|"4900,10368,11093,11581,10082,10206,10431,10119,11622,10358,11094,2,5193,10738,11623,10039,10840,5132,10011,11132,5233,10792"]
["255"|"4900,10368,11093,11581,10082,10206,11621,10431,10119,11622,10358,11094,2,10342,5193,10738,11744,10039,10840,5132,10011,11132,5233,10792"]
["251"|"4900,10368,11093,11581,10082,10206,11621,10431,10119,11622,10358,11094,2,10342,5193,10738,11744,10039,10840,5132,10011,11132,5233,10792"]
["231"|"4900,10368,11093,11581,10082,10206,10431,10119,11622,10358,11094,2,10342,5193,10738,11744,10039,10840,5132,10011,11132,5233,10792"]
["179"|"4900,10368,11618,11093,11581,10082,10206,10431,10119,11622,10358,11094,2,5193,10738,11623,10039,10840,5132,10011,11132,5233,10792"]
["184"|"4900,10368,11093,11581,10082,10206,10431,10119,11622,10358,11094,2,5193,10738,11623,10039,10840,5132,10011,11132,5233,10792"]
["187"|"4900,10368,11093,11581,10082,10206,10431,10119,11622,10358,11094,2,5193,10738,11623,10039,10840,5132,10011,11132,5233,10792"]
["247"|"4900,10368,11093,11581,10082,10206,11621,10431,10119,11622,10358,11094,2,10342,5193,10738,11744,10039,10840,5132,10011,11132,5233,10792"]
["215"|"10358"]
["216"|"4900,10368,11093,11581,10082,10206,10431,10119,11622,10358,11094,2,10342,5193,10738,11744,10039,10840,5132,10011,11132,5233,10792"]
["238"|"4900,10368,11093,11581,10082,10206,10431,10119,11622,10358,11094,2,10342,5193,10738,11744,10039,10840,5132,10011,11132,5233,10792"]
["224"|"4900,10368,11093,11581,10082,10206,10431,10119,11622,10358,11094,2,10342,5193,10738,11744,10039,10840,5132,10011,11132,5233,10792"]

我想将第一列和第二列拆分为管道分隔，然后将第二列进一步分隔为逗号分隔。

我是新手，不胜感激。

添加了拆分CatId的代码：

String[] temp = CatId.split(",",-1);
System.out.println(temp[1]);

Answer 1

真的，无法理解问题，但要给一些笔记。

// this source string: serveral columsn with different separators
String str = "209|4900,10368,11093,11581";

根据您的代码，您尝试通过两个步骤将所有单独的数字放入字符串数组：

String[] arr = str.split("\\|");    // not line.split("\\|,",-1)
// arr[0] = 209
// arr[1] = [4900,10368,11093,11581]
String[] tmp = arr[1].split(",")
// tmp[0] = 4900
// tmp[1] = 10368
// tmp[2] = 11093
// tmp[3] = 11581

如果是这样，您可以执行一个步骤：

String[] arr = str.split("[\\|,]");
// arr[0] = 209
// arr[1] = 4900
// arr[2] = 10368
// arr[3] = 11093
// arr[4] = 11581

Answer 2

您要将.split（..）的限制设置为2。

 while ((line = br1.readLine()) != null) {
    String[] value1 = line.split("\\|",2);
    String Id = value1[0];
    String CatId=value1[1]
};

要进一步划分“ CatId”的概念，请使用：

// if you need to replace unwanted chars first, you could just use the simple .replace:
CatId = CatId.replace("\"", "").replace("[", "").replace("]", "");
// Then, split the array just by ,
String[] catIdArray = CatId.split("\\,");

在Java中拆分一个已经拆分的数组字符串

2 个答案: