Java源码:计算某个目录下的一切文件(夹)的大小,神器

[{"title":"（13个子文件23KB）Java源码:计算某个目录下的所有文件(夹)的大小,神器","children":[{"title":"src","children":[{"title":"main.java <span style='color:#111;'>133B</span>","children":null,"spread":false},{"title":"NaivelyConcurrentTotalFileSize.java <span style='color:#111;'>2.25KB</span>","children":null,"spread":false},{"title":"mainUI.java <span style='color:#111;'>15.94KB</span>","children":null,"spread":false}],"spread":true},{"title":".idea","children":[{"title":"misc.xml <span style='color:#111;'>276B</span>","children":null,"spread":false},{"title":"workspace.xml <span style='color:#111;'>23.22KB</span>","children":null,"spread":false},{"title":"modules.xml <span style='color:#111;'>287B</span>","children":null,"spread":false}],"spread":true},{"title":"FolderSizeCalculator.iml <span style='color:#111;'>433B</span>","children":null,"spread":false},{"title":"out","children":[{"title":"production","children":[{"title":"FolderSizeCalculator","children":[{"title":"mainUI.class <span style='color:#111;'>12.71KB</span>","children":null,"spread":false},{"title":"mainUI$2.class <span style='color:#111;'>1006B</span>","children":null,"spread":false},{"title":"main.class <span style='color:#111;'>428B</span>","children":null,"spread":false},{"title":"NaivelyConcurrentTotalFileSize$1.class <span style='color:#111;'>1.45KB</span>","children":null,"spread":false},{"title":"mainUI$1.class <span style='color:#111;'>909B</span>","children":null,"spread":false},{"title":"NaivelyConcurrentTotalFileSize.class <span style='color:#111;'>3.91KB</span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true}],"spread":true}]