如何获取包含在指定字符串中的特定字符串？

Question

我将如何获得两个其他字符串之间的字符串？

例如：我有一个字符串<str>hello this is stuff</str>，我希望得到的是提前

Answer 1

虽然你的问题的标题是非常糟糕的感谢<str>和</str>之间

，我知道你到底是什么谈论，我之前遇到过麻烦。 解决方案使用的是Pattern。

一个简单的方法来获取是<str>和</str>（我猜可能只是东西在HTML不同）之间的字符串，是要做到这一点：第一

第一件事做初始化Pattern这样的：

Pattern pattern = Pattern.compile("<str>(.*?)</str>"); // (.*?) means 'anything' 

然后，你想从它，做得到匹配：

Matcher matcher = pattern.matcher(<str>); //Note: replace <str> with your string variable, which contains the <str> and </str> codes (and the text between them). 

接下来，德等候您是否希望找到本场比赛的最后一次出现，还是第一次，或全部，然后做这些：

First only：

if (matcher.find()) { // This makes sure that the matcher has found an occurrence before getting a string from it (to avoid exceptions) 
    occurrence = matcher.group(1); 
} 

Last only：

while(matcher.find()) { // This is just a simple while loop which will set 'n' to whatever the next occurrence is, eventually just making 'n' equal to the last occurrence . 
    occurrence = matcher.group(1); 
} 

All of them：

while(matcher.find()) { // Loops every time the matcher has an occurrence , then adds that to the occurrence string. 
    occurrence += matcher.group(1) + ", "; //Change the ", " to anything that you want to separate the occurrence by. 
} 

Hopeful这有助于你:)