REGEX：解析大字符串

我正在使用以下代码将InputStream读到String。REGEX：解析大字符串

public String convertStreamToString(InputStream is) { 
    try { 
     return new Scanner(is).useDelimiter("\\A").next(); 
    } catch (NoSuchElementException e) { 
     return ""; 
    } 
}

但是，我得到一个非常大的String作为输出。我怎样才能解析它得到Free blocks和Block count作为两个独立字符串的值？

03-01 09:28:25.772: I/System.out(8849): tune2fs 1.41.10 (10-Feb-2009) 
03-01 09:28:25.772: I/System.out(8849): Filesystem volume name: <none> 
03-01 09:28:25.772: I/System.out(8849): Last mounted on:   <not available> 
03-01 09:28:25.772: I/System.out(8849): Filesystem UUID:   c6a5907b-71b3-4686-9ed1-8dd932c6359b 
03-01 09:28:25.772: I/System.out(8849): Filesystem magic number: 0xEF53 
03-01 09:28:25.772: I/System.out(8849): Filesystem revision #: 1 (dynamic) 
03-01 09:28:25.772: I/System.out(8849): Filesystem features:  has_journal ext_attr dir_index filetype sparse_super 
03-01 09:28:25.772: I/System.out(8849): Filesystem flags:   unsigned_directory_hash 
03-01 09:28:25.772: I/System.out(8849): Default mount options: (none) 
03-01 09:28:25.772: I/System.out(8849): Filesystem state:   clean 
03-01 09:28:25.772: I/System.out(8849): Errors behavior:   Continue 
03-01 09:28:25.772: I/System.out(8849): Filesystem OS type:  Linux 
03-01 09:28:25.772: I/System.out(8849): Inode count:    24480 
03-01 09:28:25.772: I/System.out(8849): Block count:    97656 
03-01 09:28:25.772: I/System.out(8849): Reserved block count:  4882 
03-01 09:28:25.772: I/System.out(8849): Free blocks:    90433 
03-01 09:28:25.772: I/System.out(8849): Free inodes:    24469 
03-01 09:28:25.772: I/System.out(8849): First block:    1 
03-01 09:28:25.772: I/System.out(8849): Block size:    1024 
03-01 09:28:25.772: I/System.out(8849): Fragment size:   1024 
03-01 09:28:25.772: I/System.out(8849): Blocks per group:   8192 
03-01 09:28:25.772: I/System.out(8849): Fragments per group:  8192 
03-01 09:28:25.772: I/System.out(8849): Inodes per group:   2040 
03-01 09:28:25.772: I/System.out(8849): Inode blocks per group: 255 
03-01 09:28:25.772: I/System.out(8849): Filesystem created:  Thu Mar 1 04:01:37 2012 
03-01 09:28:25.772: I/System.out(8849): Last mount time:   n/a 
03-01 09:28:25.772: I/System.out(8849): Last write time:   Thu Mar 1 04:01:37 2012 
03-01 09:28:25.772: I/System.out(8849): Mount count:    0 
03-01 09:28:25.772: I/System.out(8849): Maximum mount count:  35 
03-01 09:28:25.772: I/System.out(8849): Last checked:    Thu Mar 1 04:01:37 2012 
03-01 09:28:25.772: I/System.out(8849): Check interval:   15552000 (6 months) 
03-01 09:28:25.772: I/System.out(8849): Next check after:   Tue Aug 28 04:01:37 2012 
03-01 09:28:25.772: I/System.out(8849): Reserved blocks uid:  0 (user root) 
03-01 09:28:25.772: I/System.out(8849): Reserved blocks gid:  0 (group root) 
03-01 09:28:25.772: I/System.out(8849): First inode:    11 
03-01 09:28:25.772: I/System.out(8849): Inode size:   128 
03-01 09:28:25.772: I/System.out(8849): Journal inode:   8 
03-01 09:28:25.772: I/System.out(8849): Default directory hash: half_md4 
03-01 09:28:25.772: I/System.out(8849): Directory Hash Seed:  fb1c85fc-7de0-431e-be07-aa42bee66e7d 
03-01 09:28:25.772: I/System.out(8849): Journal backup:   inode blocks 
03-01 09:28:25.819: I/System.out(8849): length = 1512 
03-01 09:28:25.819: I/System.out(8849): 2

来源

2012-03-01 Binoy Babu

[编辑]很抱歉没有意识到你与你的扫描仪在做什么：

Scanner scanner = new Scanner(is).useDelimiter("\\n"); 
    scanner.findWithinHorizon(Pattern.compile("Block\\scount:\\s*(\\d+)"), 0); 
    String blockCount = scanner.match().group(1); 
    scanner.findWithinHorizon(Pattern.compile("Free\\sblocks:\\s*(\\d+)"), 0); 
    String freeBlocks = scanner.match().group(1);

这将会给你免费块和块计数的只是值。例如，freeBlocks将等于“90433”，并且blockCount将等于“97656”。

来源

2012-03-01 04:29:54 brettw

我得到'03-01 10：07：49.436：W/System.err（9432）：java.lang.IllegalStateException：目前没有成功匹配 '。 :( – 2012-03-01 04:38:56

仍然返回null – 2012-03-01 05:40:33

它现在匹配，但返回整行，问题与顺序。BlockCount应该被放置在第一个。 – 2012-03-01 06:34:03

Scanner sc = new Scanner(is); 
while (sc.hasNextLine()) { 
    String line = sc.nextLine(); 
    // If line contains information 
     // Parse Line 
    // Else 
     // continue 
}

我会留下试图确定该行是否包含您要查找的信息的逻辑。

来源

2012-03-01 04:33:11

REGEX：解析大字符串

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