Ant集成Ivy时出现No appropriate method found错误求助

执行build.xml中resolve目标（第29行<ivy:retrieve/>）时出现错误：

...\IdeaProjects\...\build.xml:29: impossible to configure ivy:settings with given file: ...\IdeaProjects\...\ivysettings.xml : java.text.ParseException: failed to load settings from file:.../IdeaProjects/.../ivysettings.xml: no appropriate method found for adding default on class org.apache.ivy.core.settings.IvySettings

相关配置文件 #

1. build.xml片段 #

<project xmlns:ivy="antlib:org.apache.ivy.ant" name="My library" basedir="." default="dist">
...
    <!-- =================================
      target: resolve
     ================================= -->
    <target name="resolve" description="--> retrieve dependencies with Ivy">
        <ivy:retrieve/>   <!-- line 29 -->
    </target>

2. ivysettings.xml内容（错误版本） #

<ivy-settings>
    <settings defaultResolvers="public">
        <resolvers>
            <default name="public" description="Public Maven Repository" class="org.apache.ivy.plugins.resolver.DefaultResolver">
                <root>https://repo.maven.apache.org/maven2/</root>
                <strategy name="default" description="Default Strategy" />
            </default>
        </resolvers>
    </settings>
</ivy-settings>

3. ivy.xml内容 #

<ivy-module version="2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://antlib.oslab.org/ivy/ivy.xsd">
    <info organisation="com.xxx" module="my-common"/>
    <dependencies>
        <dependency org="org.springframework" name="spring-jdbc" rev="6.2.5"/>
        <dependency org="org.springframework" name="spring-tx" rev="6.2.5"/>
        <dependency org="org.springframework" name="spring-orm" rev="6.2.5"/>
    </dependencies>
</ivy-module>

环境说明 #

• IntelliJ中操作
• 使用本地安装的Ant（已配置ANT_HOME）
• Ivy jar已放入$ANT_HOME/lib目录

解决方案 #

错误根源是ivysettings.xml中使用了错误的解析器标签<default>，Ivy无法识别该标签对应的配置方法。要配置Maven中央仓库，应使用专门的<ibiblio>解析器（原生支持Maven仓库格式），修改后的ivysettings.xml如下：

<ivy-settings>
    <settings defaultResolvers="public"/>
    <resolvers>
        <!-- 使用ibiblio解析器配置Maven中央仓库 -->
        <ibiblio name="public" m2compatible="true" root="https://repo.maven.apache.org/maven2/"/>
    </resolvers>
</ivy-settings>

若ivysettings.xml不在项目根目录等默认加载路径，需在build.xml的resolve目标中显式指定配置文件路径：

<target name="resolve" description="--> retrieve dependencies with Ivy">
    <ivy:settings file="path/to/ivysettings.xml"/>
    <ivy:retrieve/>
</target>

内容的提问来源于stack exchange，提问作者Thom