首先：
1.下载flex的sdk，如果你电脑有装flash builder，它自带了一份，位于安装目录的sdks目录下。
备注：（sdk依赖java的jre）
2.配置mxmlc的java运行环境jre，该配置文件位于sdk/bin/jvm.config，更改java.home=jre所在目录。
3.配置mxmlc的环境变量,改环境变量exe，位于sdk/bin/mxmlc.exe，控制台输入：mxmlc，没报错证明配置成功。
注意：如果不配置，并且你之前有配置过java的jre，那么mxmlc会默认为java的jre。
然后：需要一个编译项目的配置文件flex-config .xml，该文件可以在sdk的frameworks目录可以找到。可以参考以下完整的：
<?xml version="1.0"?>
ADOBE SYSTEMS INCORPORATED
Copyright 2005-2007 Adobe Systems Incorporated
All Rights Reserved.
NOTICE: Adobe permits you to use, modify, and distribute this file
in accordance with the terms of the license agreement accompanying it.--><flex-config>
Specifies the minimum player version that will run the compiled SWF. -->
<target-player>11.1target-player>
Specifies the version of the compiled SWF -->
<swf-version>14swf-version>
<compiler>
Turn on generation of accessible SWFs. -->
<accessible>trueaccessible>
Specifies the locales for internationalization. -->
<locale>
<locale-element>en_USlocale-element>
locale>
List of path elements that form the roots of ActionScript class hierarchies. -->
not set -->
string-->
Allow the source-path to have path-elements which contain other path-elements -->
<allow-source-path-overlap>falseallow-source-path-overlap>
Run the AS3 compiler in a mode that detects legal but potentially incorrect -->
code. -->
<show-actionscript-warnings>trueshow-actionscript-warnings>
Turn on generation of debuggable SWFs. False by default for mxmlc, -->
but true by default for compc. -->
true-->
List of SWC files or directories to compile against but to omit from -->
linking. -->
<external-library-path>
<path-element>${flexlib}/libs/player/{targetPlayerMajorVersion}.{targetPlayerMinorVersion}/playerglobal.swcpath-element>
external-library-path>
not set -->
src/res/comlib.swc-->
List of SWC files or directories that contain SWC files. -->
<library-path>
<path-element>${flexlib}/libspath-element>
<path-element>${flexlib}/libs/mxpath-element>
<path-element>${flexlib}/locale/{locale}path-element>
The following entry is because LCDS copies playerfds.swc in the player folder -->
<path-element>${flexlib}/libs/playerpath-element>
<path-element>${flexlib}/src/respath-element>
library-path>
<namespaces>
Specify a URI to associate with a manifest of components for use as MXML -->
elements. -->
<namespace>
<uri>http://ns.adobe.com/mxml/2009uri>
<manifest>${flexlib}/mxml-2009-manifest.xmlmanifest>
namespace>
<namespace>
<uri>library://ns.adobe.com/flex/sparkuri>
<manifest>${flexlib}/spark-manifest.xmlmanifest>
namespace>
<namespace>
<uri>library://ns.adobe.com/flex/mxuri>
<manifest>${flexlib}/mx-manifest.xmlmanifest>
namespace>
<namespace>
<uri>http://www.adobe.com/2006/mxmluri>
<manifest>${flexlib}/mxml-manifest.xmlmanifest>
namespace>
namespaces>
Enable post-link SWF optimization. -->
<optimize>trueoptimize>
Enable trace statement omission. -->
<omit-trace-statements>trueomit-trace-statements>
Keep the following AS3 metadata in the bytecodes. -->
Warning: For the data binding feature in the Flex framework to work properly, -->
the following metadata must be kept: -->
1. Bindable -->
2. Managed -->
3. ChangeEvent -->
4. NonCommittingChangeEvent -->
5. Transient -->
BindableManagedChangeEventNonCommittingChangeEventTransient-->
Turn on reporting of data binding warnings. For example: Warning: Data binding -->
will not be able to detect assignments to "foo". -->
<show-binding-warnings>trueshow-binding-warnings>
toggle whether warnings generated from unused type selectors are displayed -->
<show-unused-type-selector-warnings>trueshow-unused-type-selector-warnings>
Run the AS3 compiler in strict error checking mode. -->
<strict>truestrict>
Use the ActionScript 3 class based object model for greater performance and better error reporting. -->
In the class based object model most built-in functions are implemented as fixed methods of classes -->
(-strict is recommended, but not required, for earlier errors) -->
<as3>trueas3>
Use the ECMAScript edition 3 prototype based object model to allow dynamic overriding of prototype -->
properties. In the prototype based object model built-in functions are implemented as dynamic -->
properties of prototype objects (-strict is allowed, but may result in compiler errors for -->
references to dynamic properties) -->
<es>falsees>
List of CSS or SWC files to apply as a theme. -->
<theme>
The Flex 4 default theme is Spark. -->
<filename>${flexlib}/themes/Halo/halo.swcfilename>
theme>
Turns on the display of stack traces for uncaught runtime errors. -->
<verbose-stacktraces>falseverbose-stacktraces>
Defines the AS3 file encoding. -->
not set -->
-->
<fonts>
Enables advanced anti-aliasing for embedded fonts, which provides greater clarity for small -->
fonts. This setting can be overriden in CSS for specific fonts. -->
NOTE: flash-type has been deprecated. Please use advanced-anti-aliasingtrue-->
<advanced-anti-aliasing>trueadvanced-anti-aliasing>
The number of embedded font faces that are cached. -->
<max-cached-fonts>20max-cached-fonts>
The number of character glyph outlines to cache for each font face. -->
<max-glyphs-per-face>1000max-glyphs-per-face>
Defines ranges that can be used across multiple font-face declarations. -->
See flash-unicode-table.xml for more examples. -->
not set -->
englishRangeU+0020-007E-->
Compiler font manager classes, in policy resolution order-->
<managers>
<manager-class>flash.fonts.JREFontManagermanager-class>
<manager-class>flash.fonts.BatikFontManagermanager-class>
<manager-class>flash.fonts.AFEFontManagermanager-class>
<manager-class>flash.fonts.CFFFontManagermanager-class>
managers>
File containing cached system font licensing information produced via
java -cp mxmlc.jar flex2.tools.FontSnapshot (fontpath)
Will default to winFonts.ser on Windows XP and
macFonts.ser on Mac OS X, so is commented out by default. -->
<local-fonts-snapshot>${flexlib}/localFonts.serlocal-fonts-snapshot>
fonts>
Array.toString() format has changed. -->
<warn-array-tostring-changes>falsewarn-array-tostring-changes>
Assignment within conditional. -->
<warn-assignment-within-conditional>truewarn-assignment-within-conditional>
Possibly invalid Array cast operation. -->
<warn-bad-array-cast>truewarn-bad-array-cast>
Non-Boolean value used where a Boolean value was expected. -->
<warn-bad-bool-assignment>truewarn-bad-bool-assignment>
Invalid Date cast operation. -->
<warn-bad-date-cast>truewarn-bad-date-cast>
Unknown method. -->
<warn-bad-es3-type-method>truewarn-bad-es3-type-method>
Unknown property. -->
<warn-bad-es3-type-prop>truewarn-bad-es3-type-prop>
Illogical comparison with NaN. Any comparison operation involving NaN will evaluate to false because NaN != NaN. -->
<warn-bad-nan-comparison>truewarn-bad-nan-comparison>
Impossible assignment to null. -->
<warn-bad-null-assignment>truewarn-bad-null-assignment>
Illogical comparison with null. -->
<warn-bad-null-comparison>truewarn-bad-null-comparison>
Illogical comparison with undefined. Only untyped variables (or variables of type *) can be undefined. -->
<warn-bad-undefined-comparison>truewarn-bad-undefined-comparison>
Boolean() with no arguments returns false in ActionScript 3.0. Boolean() returned undefined in ActionScript 2.0. -->
<warn-boolean-constructor-with-no-args>falsewarn-boolean-constructor-with-no-args>
__resolve is no longer supported. -->
<warn-changes-in-resolve>falsewarn-changes-in-resolve>
Class is sealed. It cannot have members added to it dynamically. -->
<warn-class-is-sealed>truewarn-class-is-sealed>
Constant not initialized. -->
<warn-const-not-initialized>truewarn-const-not-initialized>
Function used in new expression returns a value. Result will be what the -->
function returns, rather than a new instance of that function. -->
<warn-constructor-returns-value>falsewarn-constructor-returns-value>
EventHandler was not added as a listener. -->
<warn-deprecated-event-handler-error>falsewarn-deprecated-event-handler-error>
Unsupported ActionScript 2.0 function. -->
<warn-deprecated-function-error>truewarn-deprecated-function-error>
Unsupported ActionScript 2.0 property. -->
<warn-deprecated-property-error>truewarn-deprecated-property-error>
More than one argument by the same name. -->
<warn-duplicate-argument-names>truewarn-duplicate-argument-names>
Duplicate variable definition -->
<warn-duplicate-variable-def>truewarn-duplicate-variable-def>
ActionScript 3.0 iterates over an object's properties within a "for x in target" statement in random order. -->
<warn-for-var-in-changes>falsewarn-for-var-in-changes>
Importing a package by the same name as the current class will hide that class identifier in this scope. -->
<warn-import-hides-class>truewarn-import-hides-class>
Use of the instanceof operator. -->
<warn-instance-of-changes>truewarn-instance-of-changes>
Internal error in compiler. -->
<warn-internal-error>truewarn-internal-error>
_level is no longer supported. For more information, see the flash.display package. -->
<warn-level-not-supported>truewarn-level-not-supported>
Missing namespace declaration (e.g. variable is not defined to be public, private, etc.). -->
<warn-missing-namespace-decl>truewarn-missing-namespace-decl>
Negative value will become a large positive value when assigned to a uint data type. -->
<warn-negative-uint-literal>truewarn-negative-uint-literal>
Missing constructor. -->
<warn-no-constructor>falsewarn-no-constructor>
The super() statement was not called within the constructor. -->
<warn-no-explicit-super-call-in-constructor>falsewarn-no-explicit-super-call-in-constructor>
Missing type declaration. -->
<warn-no-type-decl>truewarn-no-type-decl>
In ActionScript 3.0, white space is ignored and '' returns 0. Number() returns -->
NaN in ActionScript 2.0 when the parameter is '' or contains white space. -->
<warn-number-from-string-changes>falsewarn-number-from-string-changes>
Change in scoping for the this keyword. Class methods extracted from an -->
instance of a class will always resolve this back to that instance. In -->
ActionScript 2.0 this is looked up dynamically based on where the method -->
is invoked from. -->
<warn-scoping-change-in-this>falsewarn-scoping-change-in-this>
Inefficient use of += on a TextField.-->
<warn-slow-text-field-addition>truewarn-slow-text-field-addition>
Possible missing parentheses. -->
<warn-unlikely-function-value>truewarn-unlikely-function-value>
Possible usage of the ActionScript 2.0 XML class. -->
<warn-xml-class-has-changed>falsewarn-xml-class-has-changed>
compiler>
compute-digest: writes a digest to the catalog.xml of a library. Use this when the library will be used as a
cross-domain rsl.-->
compute-digest usage:boolean-->
remove-unused-rsls: remove RSLs that are not being used by the application-->
<remove-unused-rsls>trueremove-unused-rsls>
A list of runtime shared library URLs to be loaded before applications start. -->
not set -->
stringstring-->
runtime-shared-library-path: specifies a SWC or directory to link against and an RSL URL to load with optional failover URLs -->
Framework SWC -->
<runtime-shared-library-path>
<path-element>${flexlib}/libs/framework.swcpath-element>
<rsl-url>http://fpdownload.adobe.com/pub/swz/flex/4.6.0.23201/framework_4.6.0.23201.swzrsl-url>
<policy-file-url>http://fpdownload.adobe.com/pub/swz/crossdomain.xmlpolicy-file-url>
<rsl-url>framework_4.6.0.23201.swzrsl-url>
<policy-file-url>policy-file-url>
runtime-shared-library-path>
TextLayout SWC -->
<runtime-shared-library-path>
<path-element>${flexlib}/libs/textLayout.swcpath-element>
<rsl-url>http://fpdownload.adobe.com/pub/swz/tlf/2.0.0.232/textLayout_2.0.0.232.swzrsl-url>
<policy-file-url>http://fpdownload.adobe.com/pub/swz/crossdomain.xmlpolicy-file-url>
<rsl-url>textLayout_2.0.0.232.swzrsl-url>
<policy-file-url>policy-file-url>
runtime-shared-library-path>
Spark SWC-->
<runtime-shared-library-path>
<path-element>${flexlib}/libs/spark.swcpath-element>
<rsl-url>http://fpdownload.adobe.com/pub/swz/flex/4.6.0.23201/spark_4.6.0.23201.swzrsl-url>
<policy-file-url>http://fpdownload.adobe.com/pub/swz/crossdomain.xmlpolicy-file-url>
<rsl-url>spark_4.6.0.23201.swzrsl-url>
<policy-file-url>policy-file-url>
runtime-shared-library-path>
Sparkskins SWC-->
<runtime-shared-library-path>
<path-element>${flexlib}/libs/sparkskins.swcpath-element>
<rsl-url>http://fpdownload.adobe.com/pub/swz/flex/4.6.0.23201/sparkskins_4.6.0.23201.swzrsl-url>
<policy-file-url>http://fpdownload.adobe.com/pub/swz/crossdomain.xmlpolicy-file-url>
<rsl-url>sparkskins_4.6.0.23201.swzrsl-url>
<policy-file-url>policy-file-url>
runtime-shared-library-path>
RPC SWC -->
<runtime-shared-library-path>
<path-element>${flexlib}/libs/rpc.swcpath-element>
<rsl-url>http://fpdownload.adobe.com/pub/swz/flex/4.6.0.23201/rpc_4.6.0.23201.swzrsl-url>
<policy-file-url>http://fpdownload.adobe.com/pub/swz/crossdomain.xmlpolicy-file-url>
<rsl-url>rpc_4.6.0.23201.swzrsl-url>
<policy-file-url>policy-file-url>
runtime-shared-library-path>
Charts SWC -->
<runtime-shared-library-path>
<path-element>${flexlib}/libs/charts.swcpath-element>
<rsl-url>http://fpdownload.adobe.com/pub/swz/flex/4.6.0.23201/charts_4.6.0.23201.swzrsl-url>
<policy-file-url>http://fpdownload.adobe.com/pub/swz/crossdomain.xmlpolicy-file-url>
<rsl-url>charts_4.6.0.23201.swzrsl-url>
<policy-file-url>policy-file-url>
runtime-shared-library-path>
Spark_dmv SWC -->
<runtime-shared-library-path>
<path-element>${flexlib}/libs/spark_dmv.swcpath-element>
<rsl-url>http://fpdownload.adobe.com/pub/swz/flex/4.6.0.23201/spark_dmv_4.6.0.23201.swzrsl-url>
<policy-file-url>http://fpdownload.adobe.com/pub/swz/crossdomain.xmlpolicy-file-url>
<rsl-url>spark_dmv_4.6.0.23201.swzrsl-url>
<policy-file-url>policy-file-url>
runtime-shared-library-path>
OSMF SWC -->
<runtime-shared-library-path>
<path-element>${flexlib}/libs/osmf.swcpath-element>
<rsl-url>http://fpdownload.adobe.com/pub/swz/flex/4.6.0.23201/osmf_1.0.0.16316.swzrsl-url>
<policy-file-url>http://fpdownload.adobe.com/pub/swz/crossdomain.xmlpolicy-file-url>
<rsl-url>osmf_1.0.0.16316.swzrsl-url>
<policy-file-url>policy-file-url>
runtime-shared-library-path>
MX SWC -->
<runtime-shared-library-path>
<path-element>${flexlib}/libs/mx/mx.swcpath-element>
<rsl-url>http://fpdownload.adobe.com/pub/swz/flex/4.6.0.23201/mx_4.6.0.23201.swzrsl-url>
<policy-file-url>http://fpdownload.adobe.com/pub/swz/crossdomain.xmlpolicy-file-url>
<rsl-url>mx_4.6.0.23201.swzrsl-url>
<policy-file-url>policy-file-url>
runtime-shared-library-path>
Advancedgrids SWC -->
<runtime-shared-library-path>
<path-element>${flexlib}/libs/advancedgrids.swcpath-element>
<rsl-url>http://fpdownload.adobe.com/pub/swz/flex/4.6.0.23201/advancedgrids_4.6.0.23201.swzrsl-url>
<policy-file-url>http://fpdownload.adobe.com/pub/swz/crossdomain.xmlpolicy-file-url>
<rsl-url>advancedgrids_4.6.0.23201.swzrsl-url>
<policy-file-url>policy-file-url>
runtime-shared-library-path>
static-link-runtime-shared-libraries: statically link the libraries specified by the -runtime-shared-libraries-path option.-->
<static-link-runtime-shared-libraries>falsestatic-link-runtime-shared-libraries>
target-player: specifies the version of the player the application is targeting.
Features requiring a later version will not be compiled into the application.
The minimum value supported is "9.0.0".-->
target-player usage:version-->
Enables SWFs to access the network. -->
<use-network>trueuse-network>
Metadata added to SWFs via the SWF Metadata tag. -->
<metadata>
<title>Adobe Flex 4 Applicationtitle>
<description>http://www.adobe.com/products/flexdescription>
<publisher>unknownpublisher>
<creator>unknowncreator>
<language>ENlanguage>
metadata>
licenses: specifies a list of product and serial number pairs. -->
not set -->
stringnumber-->flex-config>备注：
1.其中${flexlib} 代表sdk的frameworks目录。
2.由于我的项目是Halo主题，所以设置<filename>${flexlib}/themes/Halo/halo.swcfilename>指定主题，
如果是spark主题，则:<filename>${flexlib}/themes/Spark/spark.cssfilename>。
最后：编写编译批处理
假定工程的application文件位于D:/project/src/test.mxml，依赖swc文件位于D:/project/src/lib目录，输出目录为D:/output
那么：建立批处理文件bulid.bat
@echo off cls set appPath=D:/project/
set outPath=D:/output
mxmlc -load-config flex-config.xml %appPath%/test.mxml -library-path+=%appPath%/lib -output %outPath%/test.swf
