Use jsbuilder to compress your JavaScript/CSS source code

Jsbuilder2 (extjs.com/products/jsbuilder) is a newly released source code packaging tool for extjs 3. It is written in Java and packaged and compiled into jar format. The execution file is released to the programmer. As a packaging tool for auxiliary developers, it contains several open-source projects, including the rhino Project (famous JavaScript compiler) and Yui compressor (minification and obfuscation for JS/CSS compression ).
JSON encoder (from www.json.org) in the Java environment, which is easy to use in JavaScript and CSS projects. "Obfuscation" mainly relies on Yui compressor, because we know that JavaScript source code obfuscation is a "Top Priority" for the confidentiality of many projects. the Yui compressor algorithm should be very safe and provide a high level of obfuscation, such as the name of the mixed local variable.

Jsbuilder2 has the following features:

• Cross-platform Java applications with simple usage
• JSON-based configuration file structure
• Use Yui compressor for File compression
• Resource files can be easily migrated between the development and deployment phases

Unlike the first version of the GUI, jsbuilder2 is a command line-only tool, so we must understand its parameters. First, you must have java.exe to run the jar package. We usually add this command to the "environment variable", and then add the-jar parameter to run the jsbuilder2.jar file. For the jsbuilder parameter list, see:

• -- Projectfile-P (mandatory) jsb2 file, which defines the specific packaging task. Location of A jsb2 project file
• -- The main directory generated by homedir-D (required) is usually the directory for project deployment.
• -- Verbose-V (optional parameter) Output detailed process in production.
• -- Debugsuffix-s (optional parameter) for convenience of debugging, the subsequent name of the JS debugging file is produced. The default value is "debug" to indicate that this is the JS file used for debugging.
• -- Help-H (optional parameter) displays help.

Usage on Windows:

Java-jar jsbuilder2.jar -- projectfile C:/apps/www/ext3svn/EXT. jsb2 -- homedir C:/apps/www/deploy/

Usage on Linux or OS X:

Java-jar jsbuilder2.jar -- projectfile/home/Aaron/www/trunk/EXT. jsb2 -- homedir/home/Aaron/www/deploy/

As mentioned above, the jsb2 file of jsbuilder is obviously a configuration file serving the second version, which is different from the old version. In the first version, *. JSB used an XML file as the configuration file. At that time, it was a program written by. Net winform. In this Java rewriting version, JSON is used as the configuration file format. We have mentioned that jsbuilder has both the rhino JS engine of moliza and the json.org package. It allows the JS engine to obtain the JSON object using the eval () function, and also allows the Java code to obtain this
JSON objects are convenient methods. Is it inconvenient to use XML? It is not necessarily because we can learn from the open-source information of rhino. The newer version of rhino is upgraded to JavaScript 1.8, which officially supports E4X (ecmascript (aka JavaScript) for XML, e4X. With E4X support, it is easy to convert XML into JavaScript objects. Of course, using XML is another thing.

The following describes the detailed list of JSON formats.

The top-level keys ):

Projectname	String type	Description of the project.
Deploydir	String type	The deployment directory specified by the command line. This directory is created in the homedir directory.
Licensetext	String type	Specify the header content for all JS and CSS, and use/N as a line break.
Pkgs	Array type	Array of package Descriptors
Resources	Array type	Resource descriptor Array

Package Descriptor (file descriptors :):

File	String type	Imported file.
Path	String type	Directory of the imported file.
Isdebug	Bool type	Whether to generate a debug version this configuration is currently not enabled (unused), so there will always be two versions of debugging and compression.
Filedocumdes	Array type	The file descriptor to be introduced in this package.
Pkgdeps	Array type	Package descriptor list. The behavior of this configuration depends on the configuration of includeps.
Includedeps	Bool type	Whether the output file contains dependent files. The default value is false.

Resource Descriptors)

SRC	String type	Source of the migrated Resource
Dest	String type	Destination of the moved Resource
Filters	String type	Create a regular expression that specifies how to filter files copied from SRC to DeST. All SVN and hidden files will be automatically excluded. Note that all/'s must be escaped //.

Resource Descriptor)

SRC	String type	Source of the migrated Resource
Dest	String type	Destination of the moved Resource
Filters	String type	Create a regular expression that specifies how to filter files copied from SRC to DeST. All SVN and hidden files will be automatically excluded. Note that all/'s must be escaped //.

From the list, we can see that the JSON format is still listed as key/value, key/key value. After we define our own configuration, save it as a file *. jsb2 for jsbuilder to read.