Question

我有这个字符串：page: 4, response: 5, alt: 99

我想将值提取到数组中：

[4,5,99]

这是我的代码，有没有办法改进它？

pattern = "page: d+?,response: d+?, alt: d+?";

    String first = origianlString.replaceAll(pattern, "$0"); 
    String second = origianlString.replaceAll(pattern, "$1"); 
    String third = origianlString.replaceAll(pattern, "$2");

Answer 1

你可以试试这个：

String regex = "\\D+?(\\d+)\\D+?(\\d+)\\D+?(\\d+)";
String input = "page: 4, response: 5, alt: 99";
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(input);
if (m.find()) {
    String first = m.group(1);
    String second = m.group(2);
    String third = m.group(3);
    System.out.println("[" + first + "," + second + "," + third+ "]");
}

<强>输出：

[4,5,99]

Answer 2

使用RepalceAll

String str = "page: 4, response: 5, alt: 99";      
str = str.replaceAll("[^0-9]+", " ");
System.out.println(Arrays.asList(str.trim().split(" ")));

Answer 3

最好的办法是使用拆分方法，假设值总是用“，”分隔

例如：

String data = "page: 4, response: 5, alt: 99";
String[] split = data.split(","); //Get each individual entry
int[] values = new int[split.length]; //Create array to hold values
for (int i = 0; i < split.length; i++) { //Go through each value
    String str = split[i]; //Get the string
    str = str.trim(); //remove whitespace
    String[] pair = str.split(":"); //Split to get key and value separate
    values[i] = Integer.parseInt(pair[1]); //Put int value into array
}

如何在3个键之间提取数值？

3 个答案: