Question

如果我有字符串

thisIsSomthing=4891\r\n
thisIsSomthingElse=27398472\r\n
thisIsNumber1=1\r\n

我怎么找到

thisIsNumber1

然后使用正则表达式返回1

Answer 1

这假设您确实将所发布的内容放在字符串中，而不是放在文件中。当您处理属性时，您应该使用Properties而不是正则表达式：

    String yourString = ...
    Properties prop = new Properties();
    try {
        prop.load(new StringReader(yourString));
        String result = prop.getProperty("thisIsNumber1");
        System.out.println(result);
    } catch (IOException e) {
        System.out.println("Error loading properties:");
        e.printStackTrace();
    }

Answer 2

/ thisIsNumber1 =（\ d +）。* /

它将在捕获组1中。

Answer 3

 String line="thisIsNumber1=1\r\n";
 String temp=line.split("\\r?\\n")[0].split("=")[1];
 System.out.println("Value="+temp+"*"); // 1* "*" shows nothing is concatenated after 
 the character in the output

从字符串中获取数字值

3 个答案: