尽管可能不明智,但可以读取基本上重命名为 .zip 文件的存档格式( .ear , .war , .jar 等),使用jar:
URI scheme。
例如,当uri
变量评估为单个顶级归档时,以下代码可以正常工作,例如:当uri
等于jar:file:///Users/justingarrick/Desktop/test/my_war.war!/
private FileSystem createZipFileSystem(Path path) throws IOException {
URI uri = URI.create("jar:" + path.toUri().toString());
FileSystem fs;
try {
fs = FileSystems.getFileSystem(uri);
} catch (FileSystemNotFoundException e) {
fs = FileSystems.newFileSystem(uri, new HashMap<>());
}
return fs;
}
但是,当URI包含嵌套存档时,getFileSystem
和newFileSystem
调用会失败并显示IllegalArgumentException
。当uri
等于jar:jar:file:///Users/justingarrick/Desktop/test/my_war.war!/some_jar.jar!/
( .war 中的 .jar )时。
嵌套存档文件是否有有效的java.net.URI
方案?
答案 0 :(得分:1)
如上面Jonas Berlin的评论所述,答案是否。来自java.net.JarURLConnection source:
/* get the specs for a given url out of the cache, and compute and
* cache them if they're not there.
*/
private void parseSpecs(URL url) throws MalformedURLException {
String spec = url.getFile();
int separator = spec.indexOf("!/");
/*
* REMIND: we don't handle nested JAR URLs
*/
if (separator == -1) {
throw new MalformedURLException("no !/ found in url spec:" + spec);
}
jarFileURL = new URL(spec.substring(0, separator++));
entryName = null;
/* if ! is the last letter of the innerURL, entryName is null */
if (++separator != spec.length()) {
entryName = spec.substring(separator, spec.length());
entryName = ParseUtil.decode (entryName);
}
}