java正则表达式用于勉强匹配
需要找到以下问题的表达式：
String given = "{ \"questionID\" :\"4\", \"question\":\"What is your favourite hobby?\",\"answer\" :\"answer 4\"},{ \"questionID\" :\"5\", \"question\" :\"What was the name of the first company you worked at?\",\"answer\" :\"answer 5\"}";
我想要得到什么： "{ \"questionID\" :\"4\", \"question\":\"What is your favorite hobby?\", \"answer\" :\"********\"},{ \"questionID\" :\"5\", \"question\" :\"您工作的第一家公司的名称是什么在？\",\"回答\" :\"*****\"}";
我正在尝试什么：
String regex = "(.*answer\"\\s:\"){1}(.*)(\"[\\s}]?)";
String rep = "$1*****$3";
System.out.println(test.replaceAll(regex, rep));
我得到什么：
"{ \"questionID\" :\"4\", \"question\":\"What is your favourite hobby?\",\"answer\" :\"answer 4\"},{ \"questionID\" :\"5\", \"question\" :\"What was the name of the first company you worked at?\",\"answer\" :\"******\"}";
由于贪婪的行为，第一组捕获了两个“答案”部分，而我希望它停止找到足够的后，进行替换，然后继续进一步查找。
need to find an expression for the following problem:
String given = "{ \"questionID\" :\"4\", \"question\":\"What is your favourite hobby?\",\"answer\" :\"answer 4\"},{ \"questionID\" :\"5\", \"question\" :\"What was the name of the first company you worked at?\",\"answer\" :\"answer 5\"}";
What I want to get: "{ \"questionID\" :\"4\", \"question\":\"What is your favourite hobby?\",\"answer\" :\"*******\"},{ \"questionID\" :\"5\", \"question\" :\"What was the name of the first company you worked at?\",\"answer\" :\"******\"}";
What I am trying:
String regex = "(.*answer\"\\s:\"){1}(.*)(\"[\\s}]?)";
String rep = "$1*****$3";
System.out.println(test.replaceAll(regex, rep));
What I am getting:
"{ \"questionID\" :\"4\", \"question\":\"What is your favourite hobby?\",\"answer\" :\"answer 4\"},{ \"questionID\" :\"5\", \"question\" :\"What was the name of the first company you worked at?\",\"answer\" :\"******\"}";
Because of the greedy behaviour, the first group catches both "answer" parts, whereas I want it to stop after finding enough, perform replacement, and then keep looking further.
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该模式
似乎可以满足您的要求。这是 Java 的转义版本：
这里的关键是使用
(.*?)来匹配答案，而不是(.*)。后者匹配尽可能多的字符，前者会尽快停止。如果答案中有双引号，则上述模式将不起作用。这是一个更复杂的版本，将允许它们：
("answer"\s*:\s*")((.*?)[^\\])?(")您将有在替换模式中使用
$4代替$3。The pattern
Seems to do what you want. Here's the escaped version for Java:
The key here is to use
(.*?)to match the answer and not(.*). The latter matches as many characters as possible, the former will stop as soon as possible.The above pattern won't work if there are double quotes in the answer. Here's a more complex version that will allow them:
("answer"\s*:\s*")((.*?)[^\\])?(")You'll have to use
$4instead of$3in the replacement pattern.以下正则表达式适用于我：
\和"可能会被错误地转义，因为我没有使用 java 进行测试。http://regexr.com?303mm
The following regex works for me :
The
\and"might be incorrectly escaped since I tested without java.http://regexr.com?303mm