如何在 m2e 中配置工具链插件/在 Eclipse 中安装 maven
How to configure toolchains plugin in m2e / Installed maven in Eclipse
目前我正在使用 maven(Apache Maven 3.3.9) & Java(Java 版本: 1.8.0_91) 安装在我的 windows 机器上。我有一个 java 应用程序，它是使用 Java 版本 1.6.0_31 开发的。
由于 Apache maven(3.3.9) 不直接兼容以前版本的 Java（1.8 之前）我已经包括 toolchains plugin 使用 Java 1.6 编译和 运行 项目。我可以使用命令提示符成功构建。
但是当我尝试使用带有 eclipse m2e 插件 的 eclipse 或通过添加 external maven(3.3.9)[=37= 来构建同一个项目时] 使用 eclipse->Windows->Preferences->Maven->Installations，出现以下错误。
[WARNING]
[WARNING] Some problems were encountered while building the effective settings
[WARNING] Expected root element 'settings' but found 'toolchains' (position: START_TAG seen ...OOLCHAINS/1.1.0 http://maven.apache.org/xsd/toolchains-1.1.0.xsd">... @45:114) @ U:\POC\Repo\.m2\toolchains.xml, line 45, column 114
[WARNING]
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Replenishment Maven Webapp 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ Replenishment ---
[INFO] Deleting C:\Users\xagh9\workspace\Replenishment\target
[INFO]
[INFO] --- maven-toolchains-plugin:1.1:toolchain (default) @ Replenishment ---
[INFO] Required toolchain: jdk [ vendor='sun' version='1.6' ]
[ERROR] No toolchain found for type jdk
[ERROR] Cannot find matching toolchain definitions for the following toolchain types:
jdk [ vendor='sun' version='1.6' ]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.105 s
[INFO] Finished at: 2017-01-04T12:02:08+11:00
[INFO] Final Memory: 8M/116M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-toolchains-plugin:1.1:toolchain (default) on project Replenishment: Cannot find matching toolchain definitions for the following toolchain types:
[ERROR] jdk [ vendor='sun' version='1.6' ]
[ERROR] Please make sure you define the required toolchains in your ~/.m2/toolchains.xml file.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
注意： 使用Java_1.8 我可以在没有工具链插件的情况下成功构建项目。但是配置了工具链插件后，我面临着这个问题。谁能帮我解决这个问题。
maven 配置文件夹和存储库的 .m2 文件夹中都存在所需的 toolchains.xml
更新：
Maven编译器插件配置：
在 eclipse 运行 配置中更改目标后解决如下。
问题是 eclipse 没有自动读取 toolchains.xml。我们必须在目标中手动指定。我通过参考 this Link
解决了这个问题
目前我正在使用 maven(Apache Maven 3.3.9) & Java(Java 版本: 1.8.0_91) 安装在我的 windows 机器上。我有一个 java 应用程序，它是使用 Java 版本 1.6.0_31 开发的。
由于 Apache maven(3.3.9) 不直接兼容以前版本的 Java（1.8 之前）我已经包括 toolchains plugin 使用 Java 1.6 编译和 运行 项目。我可以使用命令提示符成功构建。
但是当我尝试使用带有 eclipse m2e 插件 的 eclipse 或通过添加 external maven(3.3.9)[=37= 来构建同一个项目时] 使用 eclipse->Windows->Preferences->Maven->Installations，出现以下错误。
[WARNING]
[WARNING] Some problems were encountered while building the effective settings
[WARNING] Expected root element 'settings' but found 'toolchains' (position: START_TAG seen ...OOLCHAINS/1.1.0 http://maven.apache.org/xsd/toolchains-1.1.0.xsd">... @45:114) @ U:\POC\Repo\.m2\toolchains.xml, line 45, column 114
[WARNING]
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Replenishment Maven Webapp 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ Replenishment ---
[INFO] Deleting C:\Users\xagh9\workspace\Replenishment\target
[INFO]
[INFO] --- maven-toolchains-plugin:1.1:toolchain (default) @ Replenishment ---
[INFO] Required toolchain: jdk [ vendor='sun' version='1.6' ]
[ERROR] No toolchain found for type jdk
[ERROR] Cannot find matching toolchain definitions for the following toolchain types:
jdk [ vendor='sun' version='1.6' ]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.105 s
[INFO] Finished at: 2017-01-04T12:02:08+11:00
[INFO] Final Memory: 8M/116M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-toolchains-plugin:1.1:toolchain (default) on project Replenishment: Cannot find matching toolchain definitions for the following toolchain types:
[ERROR] jdk [ vendor='sun' version='1.6' ]
[ERROR] Please make sure you define the required toolchains in your ~/.m2/toolchains.xml file.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
注意： 使用Java_1.8 我可以在没有工具链插件的情况下成功构建项目。但是配置了工具链插件后，我面临着这个问题。谁能帮我解决这个问题。
maven 配置文件夹和存储库的 .m2 文件夹中都存在所需的 toolchains.xml
更新：
Maven编译器插件配置：
在 eclipse 运行 配置中更改目标后解决如下。
问题是 eclipse 没有自动读取 toolchains.xml。我们必须在目标中手动指定。我通过参考 this Link
解决了这个问题