假设我有四个字符串：

s1 = ghgJirafa/com/Activity.java 
s2 = /santel/data/jira/JiraSDK.java   <- match "jira" in "jira" or "JiraSDK"
s3 = /priv/data/configJira.java       <- match "Jira" in "configJira"
s4 = /data/privJiracom/config.java
s5 = /a/data/conJiraig.java

我想写 * regex * 来匹配字符串s2和s3中的jira，而不是s1和s4中的jira，因为在**s1，s4和s5中，'jira'**在单词 * 的中间，我想避免它。我也使用了 * 大小写不敏感 * 来匹配s3。
这是我的正则表达式：((?i)jira).*\.java
注意，

ghgJirafa   <- doesn't match, Jira in the middle of the ghgJirafa word
jira        <- match, jira is a whole word
JiraSDK     <- match, jira is in the beginning of the word JiraSDK
configJira  <- match, Jira is in the end of the word configJira
privJiracom <- doesn't match, Jira is in the middle of privJiracom
conJiraig   <- doesn't match, Jira is in the middle of conJiraig

我在StackOverFlow和Google上搜索过，但没有找到这样的答案。我也在不同的不和谐频道上问过，但没有得到任何回应。