java中的模式匹配：从字符串文字中提取数字

Question

我想从字符串中提取2个数字。 我的示例代码：

import java.util.regex.Matcher; 
import java.util.regex.Pattern; 

public class Test { 

    public static int returnInt(String pattern, String inputString) { 
     Pattern intPattern = Pattern.compile(pattern); 
     Matcher matcher = intPattern.matcher(inputString); 
     matcher.find(); 
     String input = matcher.group(0); 
     return Integer.parseInt(input); 
    } 

    public static void main(String[] args) { 
     System.out 
       .println(returnInt(
         "\\d+", 
         "The following DTE jobs have been submitted to ServerFarm for execution. (farm showjobs -d -j 12774076) can be used to monitor job status. The output format is JobID : TopoName : TopoAlias : JobStatus. (The initial job status is listed in brackets. If job status is FAILED, then the job can not be run at all! Otherwise please check job status periodically.) :21554030 : IDM_INSTALLER_1H1N_REL11 : IDM_INSTALLER_1H1N_REL11 : WAITING (Being queueed on server farm)")); 
    } 
} 

我想要的输出来为：12774076和21554030，但产量只有12774076 请帮助！

Answer 1

在matcher.find()上循环并返回List<Integer>，因为对于例如，可能有多于1个匹配 。

import java.util.ArrayList; 
import java.util.List; 
import java.util.regex.Matcher; 
import java.util.regex.Pattern; 

public class Test { 

    public static List<Integer> returnInt(String pattern, String inputString) { 
     Pattern intPattern = Pattern.compile(pattern); 
     Matcher matcher = intPattern.matcher(inputString); 
     List<Integer> output = new ArrayList<>(); 
     while (matcher.find()) { 
      output.add(Integer.parseInt(matcher.group(0))); 
     } 

     return output; 
    } 

    public static void main(String[] args) { 
     System.out 
       .println(returnInt(
         "\\d{5,}", 
         "The following DTE jobs have been submitted to ServerFarm for execution. (farm showjobs -d -j 12774076) can be used to monitor job status. The output format is JobID : TopoName : TopoAlias : JobStatus. (The initial job status is listed in brackets. If job status is FAILED, then the job can not be run at all! Otherwise please check job status periodically.) :21554030 : IDM_INSTALLER_1H1N_REL11 : IDM_INSTALLER_1H1N_REL11 : WAITING (Being queueed on server farm)")); 
    } 
} 

输出

[12774076, 21554030]