解决Maven项目Update Project自动恢复为JRE1.5的问题_eclipse 修改了项目的jre,update project之后jre又自动改回去了-优快云博客

在Eclipse中创建Maven工程并更改JDK版本到1.8后，通过Maven Update Project操作会发现版本被恢复为1.5。解决方法包括：1) 在用户目录下创建settings.xml文件并配置；2) 使用自定义Maven安装，修改settings.xml中的 profiles 部分，并在Eclipse中设置指向该配置。更新设置并重启Eclipse后，问题可得到解决。

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在Eclipse中新建了一个Maven工程, 然后更改JDK版本为1.8, 结果每次使用Maven > Update project的时候JDK版本都恢复成1.5。

开始我查了很多资料，终于找到了彻底解决的方法。

方式一：

eclipse 自带的maven，它的默认目录是C:\Users\Administrator\.m2\repository

但是这个目录上面没有settings.xml

在C:\Users\Administrator\.m2下自己创建一个settings.xml

内容如下：

<?xml version="1.0" encoding="UTF-8"?>

<!--
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
-->

<!--
 | This is the configuration file for Maven. It can be specified at two levels:
 |
 |  1. User Level. This settings.xml file provides configuration for a single user,
 |                 and is normally provided in ${user.home}/.m2/settings.xml.
 |
 |                 NOTE: This location can be overridden with the CLI option:
 |
 |                 -s /path/to/user/settings.xml
 |
 |  2. Global Level. This settings.xml file provides configuration for all Maven
 |                 users on a machine (assuming they're all using the same Maven
 |                 installation). It's normally provided in
 |                 ${maven.conf}/settings.xml.
 |
 |                 NOTE: This location can be overridden with the CLI option:
 |
 |                 -gs /path/to/global/settings.xml
 |
 | The sections in this sample file are intended to give you a running start at
 | getting the most out of your Maven installation. Where appropriate, the default
 | values (values used when the setting is not specified) are provided.
 |
 |-->
<settings xmlns="http://maven.apache.org/SETTINGS/1.2.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.2.0 http://maven.apache.org/xsd/settings-1.2.0.xsd">
  <!-- localRepository
   | The path to the local repository maven will use to store artifacts.
   |
   | Default: ${user.home}/.m2/repository
  
  -->
<localRepository>D:\java\apache-maven-3.8.1\maven-repository</localRepository>
  <!-- interactiveMode
   | This