1

我有一个这样的字符串 -

"fruit=apple man=human abc=123"

我希望将值打印为 -

fruit=
apple
man=
human
abc=
123

即我还想查看分隔符值。目前我正在尝试-

String status2="fruit=apple man=human abc=123";
Scanner scn = new Scanner(status2).useDelimiter("[a-z]*=+");
while(scn.hasNext())
{
    System.out.println(scn.next());
    System.out.println(scn.delimiter());
}

但我看不到分隔符值

apple 
[a-z]*=+
human 
[a-z]*=+
123
[a-z]*=+

更新字符串 -

"cobdate=01/28/2013 fundsnotextracted= elapsedtime=00:06:02 user=dataprod starttime=Wed, 30 Jan 2013 11:50:30 periods=DAILY, MTD, YTD knowledgedate=01/30/2013:11:50:10 progress=67 statusstep=Generating Reports ....."

预期产出 -

cobdate=01/28/2013 
fundsnotextracted= 
elapsedtime=00:06:02 
user=dataprod 
starttime=Wed, 30 Jan 2013 11:50:30 
periods=DAILY, MTD, YTD 
knowledgedate=01/30/2013:11:50:10 
progress=67 
statusstep=Generating Reports .....
4

1 回答 1

1

您的分隔符不正确。您应该在每个=符号之后设置分隔符,也应该在每个whitespace. 你可以使用这个 insead: -

Scanner scn = new Scanner(status2).useDelimiter("(?<==)|[ ]");

这里的分隔符是: - 后面的空字符串=由 表示(?<==)或由 表示的空格[ ]


但是,给定您的输入字符串和所需的输出,我希望split字符串与pattern我在 中使用的相同delimiter,这将为您提供一个数组,您以后也可以在其他地方使用它:-

String status2="fruit=apple man=human abc=123";
String[] arr = status2.split("(?<==)|[ ]");
System.out.println(Arrays.toString(arr));

更新: -

对于您更新的输入,您将不得不做更多的工作。首先,你在split这里严格需要一个。另外,您必须进行两次拆分 - 一次在空格上,另一次在=.

现在,您的空格后面必须跟一系列以 结尾的字母=,这样您就不会错误地拆分值中包含的空格。因此,您的代码应如下所示: -

String str = "cobdate=01/28/2013 fundsnotextracted= elapsedtime=00:06:02 user=dataprod starttime=Wed, 30 Jan 2013 11:50:30 periods=DAILY, MTD, YTD knowledgedate=01/30/2013:11:50:10 progress=67 statusstep=Generating Reports .....";

// Split on a whitespace, followed by a sequence of letters ending with =.
// This ensures that you don't split on whitespace, optionally present in some values
String[] arr = str.split("[ ](?=[a-zA-Z]+=)");

for (String eachString : arr) {
    // Split on empty string following the = sign
    String[] tempArr = eachString.split("(?<==)");

    System.out.print(tempArr[0] + " ");

    // To ensure that you don't print a non-existence value.
    if (tempArr.length == 2) {
        System.out.println(tempArr[1]);
    } else {
        System.out.println();
    }
 }

输出: -

cobdate= 01/28/2013
fundsnotextracted= 
elapsedtime= 00:06:02
user= dataprod
starttime= Wed, 30 Jan 2013 11:50:30
periods= DAILY, MTD, YTD
knowledgedate= 01/30/2013:11:50:10
progress= 67
statusstep= Generating Reports ....
于 2013-01-30T21:37:29.383 回答