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public class UrlEscapeSample {
  public static void main(String[] args) {
    String filename = "中国 地图/? a.docx";
    String urlEncoding = URLEncoder.encode(filename, StandardCharsets.UTF_8.toString());
    prettyPrint("java.net.URLEncoder", urlEncoding);
    prettyPrint("UrlEscapers.urlFormParameterEscaper", UrlEscapers.urlFormParameterEscaper().escape(filename));
    prettyPrint("java.net.URLEncoder then replace to %20", urlEncoding.replaceAll("\\+", "%20"));
    prettyPrint("UrlEscapers.urlPathSegmentEscaper", UrlEscapers.urlPathSegmentEscaper().escape(filename));
    prettyPrint("UrlEscapers.urlFragmentEscaper", UrlEscapers.urlFragmentEscaper().escape(filename));
  }

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import io.dropwizard.Application;
import io.dropwizard.Configuration;
import io.dropwizard.client.JerseyClientBuilder;
import io.dropwizard.setup.Environment;
import io.dropwizard.testing.junit.DropwizardAppRule;
import org.assertj.core.data.MapEntry;
import org.eclipse.jetty.servlets.CrossOriginFilter;
import org.junit.ClassRule;
import org.junit.Test;

wangyingang

Sublime Text 2 – Useful Shortcuts (Mac OS X)

General

⌘T	go to file
⌘⌃P	go to project
⌘R	go to methods
⌃G	go to line
⌘KB	toggle side bar
⌘⇧P	command prompt

wangyingang

do-release-upgrade fail?

May be you got a warinning message when you execute do-release-upgrade:

Not enough free disk space

The upgrade has aborted. The upgrade needs a total of xxx M free space on disk '/boot'. Please free at least an additional xxx M of disk space on '/boot'. Empty your trash and remove temporary packages of former installations using 'sudo apt-get clean'.

Because your /boot partition is filled with old kernels. You can easily remove the old kernels if you know which packages they came in.

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^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$

// Match

2009-12T12:34
2009
2009-05-19
2009-05-19
20090519
2009123

wangyingang

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

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tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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#CURL参考资料

• http://bbs.et8.net/bbs/showthread.php?t=568472
• http://www.ruanyifeng.com/blog/2011/09/curl.html

###下载单个文件，默认将输出打印到标准输出中(STDOUT)中

curl http://www.centos.org

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#Get Gravatar image using command line(Mac OS X only)

Gravatar image download url

http://www.gravatar.com/avatar/HASH

Get default image

curl -o yourname.png http://www.gravatar.com/avatar/$(md5 -q -s [email protected])

wangyingang

#Force the user to change their password at first login You can just expire that password. After creating a new user foo, just type:

$ sudo chage -d 0 foo

And he will be forced to change it after first logon.