Java Regex查找特定文件

Question

In one of my test case I want to copy particular jar of a component from one location to another location. eg when target directory has only following jars

org.test.custom.search-4.2.2-SNAPSHOT-.jar
org.test.custom.search-4.2.2- tests -SNAPSHOT.jar

I want to copy the org.test.custom.search-4.2.2-SNAPSHOT-.jar . Where version of this jar can be changed at any time . So I can use the regex for that purpose as mentioned here[1]. But I want to know how to omit the other jar in regex. ie want to omit the jar which has string " tests " in its name.

1. Regex for files in a directory

Answer 1

You can use indexOf instead of regex to check if the file name containing the word "tests" like this:

if(fileName.indexOf("tests") >= 0) {
    // do what you want
}

Update: indexOf() will be much quicker than a regex , and is probably also easier to understand.

Answer 2

The regex based solution would be:

if (fileName.matches(".*tests.*")) {
    //do something
} else {
    //do something else
}

Answer 3

将SNAPSHOT与任何给定的版本号完全匹配，而忽略所有其他版本号（包括tests-SNAPSHOT）：

org\.test\.custom\.search-\d+\.\d+\.\d+-SNAPSHOT-\.jar

Answer 4

One regex to match the main jar but not the test jar could be:

\w+-[\d.]+-(?!tests-).*\.jar

It has a negative matcher for the string "tests-". Note that you'll have to escape the backslashes when you put this regex into a string.