Java构建时间常量配置 [英] Java build time constant configuration

问题描述

我有一个项目要使用多种配置来构建.我有一个需要在不同版本之间有所不同的常量，但我不知道如何根据我的配置更改它.

I have a project I would like to build using multiple configurations. I have a constant that needs to be different between builds but I do not know how to change it based on my config.

例如，我希望能够根据配置文件中的值执行以下操作.

For example I would like to be able to do the following based off a value in a config file.

@WebService(targetNamespace = "http://example.com/")
public class CustomerWebService {

和

@WebService(targetNamespace = "http://demo.example.com/")
public class CustomerWebService {

我们使用蚂蚁来建造.

推荐答案

我建议尝试模拟 Maven 资源过滤和配置文件属性

I would advise attempting to emulate Maven resource filtering and profile properties

..
@WebService(targetNamespace = "@WS_NAMESPACE@")
public class CustomerWebService {
..

build.xml

<target name="filter-sources">
    <copy todir="${build.dir}/src">
       <fileset dir="src/templates" includes="**/*.java"/>
       <filterset>
          <filter token="WS_NAMESPACE" value="${ws.namespace}"/>
       </filterset>
    </copy>
</target>

<target name="compile" depends="filter-sources">
    <javac destdir="${build.dir}/classes">
        <src path="src/java"/>
        <src path="${build.dir}/src"/>
        <classpath>
        ..
        ..
    </javac>
</target>

注意事项:

• ANT 复制任务能够执行模板替换.

每个配置都有不同的属性文件

Each configuration has a different property file

src/properties/dev.properties
src/properties/qa.properties
src/properties/prod.properties
..

build.xml

<property name="profile" value="dev"/>
<property file="src/properties/${profile}.properties"/>

选择替代构建配置文件

ant -Dprofile=qa ..

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