Polish拥有着强大的预编译命令，用它可以很方便的去打包资源和分离代码。

1.配置：
第一步解压缩最好放到根目录下，无需安装。
第二步将xml的解析文件copy到工程目录下。
第三步在xml上单击右键选择-打开方式-ant构建。
就是这么简单。

2.介绍xml
下面是一个例子，在这个xml下填写jad,和资源的目录。很简单，相信大家都能看懂。
<!-- This file controls the build process.                    -->
<!-- The most important target is the j2mepolish-target,      -->
<!-- which controls for what devices the application should   -->
<!-- be created and so on.                                    -->
<!--                                                          -->
<!-- Important: when you have no Wireless Toolkit installed   -->
<!-- you need to define the "preverify"-attribute             -->
<!-- of the <build>-element of the J2ME Polish task.          -->
<!--                                                          -->
<!-- When you call Ant from the command-line, you can         -->
<!-- call "ant test j2mepolish" to skip the obfuscation       -->
<!-- and to build the example for fewer handsets.             -->
<!-- The default target builds and obfuscates the example.    -->
<!--                                                          -->
<!-- The full documentation can be found at                   -->
<!-- http://www.j2mepolish.org                                -->
<!--                                                          -->
<!-- Have fun!                                                -->
<project
    name="SC"
    default="j2mepolish">

<!-- The wtk.home property should point to the directory      -->
<!-- containing the Wireless Toolkit.                         -->
<propertyname="wtk.home"value="C:\\WTK22"/>
<!-- The polish.home property should point to the directory   -->
<!-- containing the J2ME Polish installation.                 -->
<propertyname="polish.home"value="C:\\J2ME-Polish"/>

<!-- The siemens.home, nokia.home and motorola.home-          -->
<!-- properties can be necessary when their emulators         -->
<!-- should be started.                                       -->
<!-- The directory which contains the Siemens-SMTK
    <property name="siemens.home" value="C:\\siemens" />
-->
<!-- The directory which contains the Nokia-emulators
    <property name="nokia.home" value="C:\\Nokia" />
-->
<!-- The path to the Sony-Ericsson SDK
    <property name="sony-ericsson.home" value="C:\\SonyEricsson\\J2ME_SDK" />
-->
<!-- The directory which contains the Motorola-emulators
    <property name="motorola.home" value="C:\\Program Files\\Motorola\\SDK v4.3 for J2ME" />
-->

<!-- Definition of the J2ME Polish task:                      -->
<taskdefname="j2mepolish"
    classname="de.enough.polish.ant.PolishTask"
    classpath="${polish.home}/import/enough-j2mepolish-build.jar:${polish.home}/import/jdom.jar:${polish.home}/import/proguard.jar:${polish.home}/yguard-lib.jar:${wtk.home}/wtklib/kenv.zip"/>

<targetname="init">
  <propertyname="test"value="false"/>
    <propertyname="dir.work"value="build"/>
</target>

<targetname="clean"
       description="allows a clean build. You should call [ant clean] whenever you made changes to devices.xml, vendors.xml or groups.xml">
    <deletedir="build"/>
    <deletedir="dist"/>
</target>

<!-- In this target the J2ME Polish task is used.             -->
<!-- It has 3 sections:                                       -->
<!--    1. The info-section defines some general information -->
<!--    2. The deviceRequirements-section chooses the devices -->
<!--       for which the application is optimized.            -->
<!--    3. The build-section controls the actual build        -->
<!--       process.                                           -->
<targetname="j2mepolish"
        depends="init"
        description="This is the controller for the J2ME build process."
        >
    <j2mepolish>
        <!-- general settings, these settings basically form the JAD-attributes. -->
        <!-- Have a look at the <jad>-section for setting specialised attributes.
             You can also define localized attributes in the resources/messages.txt files -->
        <info
            license="GPL"
            name="驱魔Q传"
            version="1.0"
            description="单机版;Nokia_N${polish.name};动作类"
            vendorName="创艺和弦"
            icon="/icon.png"
            jarName="ExorcismSword_NOK_N${polish.name}.jar"
        />
        <deviceRequirementsunless="test">
            <or>
            <requirementname="Identifier"value="Nokia/7610"/>
            </or>
        </deviceRequirements>
        <build
            symbols=""
            fullscreen="yes"
            usePolishGui="false"
            workDir="${dir.work}">

            <midletclass="GhostMidlet"name="驱魔Q传"/>
            <variablesincludeAntProperties="true">
                <variablename="update-url"value="http://www.enough.de/update"/>
               <variablename="title"value="cc"/>
            </variables>

            <resourcesdir="res"excludes="">
                <filesetdir="res/"if="polish.identifier == Nokia/7610"/>
            </resources>

            <obfuscatorname="ProGuard"useDefaultPackage="true"unless="test">
            </obfuscator>
                 <jad>
                           <attributename="MicroEdition-Configuration"value="CLDC-1.0"/>
                           <attributename="MicroEdition-Profile"value="MIDP-1.0"/>
                          <attributename="Media-Price"value="单次下载8元"/>
                 </jad>
        </build>
    </j2mepolish>
</target>

</project>

3.Polish语法简介：
几个例子，
关于不同屏幕大小设置变量坐标。
    //#if (polish.ScreenWidth == 240)
    byteoffextX=20;
    inttitleNameX=25+offextX;
    inttitleNameY=43+20;
    intnameOffestX=33+4;
    intnameOffestY=33;
    intnumOffestX=23;
    intnumOffestY=42+4;
    intnumAllY=-5;

    bytenameTranY=1;

    intmidleMuX=-20+offextX;
    intmidleMuY=-40+30+10;

    intyoungManX=-70+offextX;
    intyoungManY=-40+90+10;

    integgX=-20;
    integgY=-37+90+10;

    intbigEggX;
    intbigEggY=13-12;

    //#else (polish.ScreenHeight == 220)
    //# int titleNameX=25;
    //#     int titleNameY=43;
    //#     byte nameOffestX=33;
    //#     byte nameOffestY=33;
    //#     byte numOffestX=23;
    //#     byte numOffestY=42;
    //#     byte numAllY=-5;

    //#     byte nameTranY=1;

    //#     int midleMuX=-20;
    //#     int midleMuY=-40;

    //#     int youngManX=-70;
    //#     int youngManY=-40;

    //#     int eggX=-20;
    //#     int eggY=-37;

    //# int bigEggX;
    //# int bigEggY=13;
    //#endif

不同按键。
    //#if (polish.Vendor == Sony-Ericsson) || (polish.Vendor == Samsung) || (polish.Vendor == Nokia)

     finalstaticpublicintisLeftKey=-6;
    finalstaticpublicintisRightKey=-7;

    //#elif (polish.Vendor == Motorola)
    //# final static public int isLeftKey=-21;
    //# final static public int isRightKey=-22;
    //#endif

4. build失败的可能原因：
Jdk的版本1.42的可以，高版本的会出错。（可能和polish的版本有关）
Xml的修改的参数有误，如midlet的名字，是否存在的资源文件夹，wtk,polish的路径。
Polish语法有错，这个一般会在build失败的控制台下有标记。
另外混淆包的路径也要设置正确