public static void deleteAllFile(final String filePath) {
		Thread t = new Thread(new Runnable() {
			@Override
			public void run() {
				try {
					File display = new File(filePath);
					if (!display.exists()) {
						return;
					}
					File[] items = display.listFiles();
					int i = display.listFiles().length;
					for (int j = 0; j < i; j++) {
						if (items[j].isFile()) {
							items[j].delete();// 删除文件
						} else {
							// 迭代删除
							deleteAllFile(items[j].getAbsolutePath());
							// 删除目录
							items[j].delete();
						}
					}
				} catch (Exception ex) {
					ex.printStackTrace();
				}

			}
		});
		t.start();
	}