转载自  部署shiro官方源码时，执行maven命令出错

部署shiro官方源码时，执行maven命令会报下面错误：

[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-toolchains-plugin:1.1:toolchain (default) on project shiro-root: 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

解决办法：

打开maven的安装目录或者免安装的conf文件夹，修改里边的toolchains.xml文件，

下面是maventoolchains.xml文件代码，最后一部分是添加进来的，注意修改自己jdk的安装目录。

<?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 athttp://www.apache.org/licenses/LICENSE-2.0Unless 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 toolchains file for Maven. It can be specified at two levels:||  1. User Level. This toolchains.xml file provides configuration for a single user,|                 and is normally provided in ${user.home}/.m2/toolchains.xml.||                 NOTE: This location can be overridden with the CLI option:||                 -t /path/to/user/toolchains.xml||  2. Global Level. This toolchains.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.home}/conf/toolchains.xml.||                 NOTE: This location can be overridden with the CLI option:||                 -gt /path/to/global/toolchains.xml|| The sections in this sample file are intended to give you a running start at| getting the most out of your Maven installation.|-->
<toolchains xmlns="http://maven.apache.org/TOOLCHAINS/1.1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/TOOLCHAINS/1.1.0 http://maven.apache.org/xsd/toolchains-1.1.0.xsd"><!-- | With toolchains you can refer to installations on your system. This | way you don't have to hardcode paths in your pom.xml. | | Every toolchain consist of 3 elements: | * type: the type of tool. An often used value is 'jdk'. Toolchains-aware |   plugins should document which type you must use. | | * provides: A list of key/value-pairs. |   Based on the toolchain-configuration in the pom.xml Maven will search for |   matching <provides/> configuration. You can decide for yourself which key-value |   pairs to use. Often used keys are 'version', 'vendor' and 'arch'. By default |   the version has a special meaning. If you configured in the pom.xml '1.5' |   Maven will search for 1.5 and above.|   | * configuration: Additional configuration for this tool.|   Look for documentation of the toolchains-aware plugin which configuration elements|   can be used.   || See also http://maven.apache.org/guides/mini/guide-using-toolchains.html|| General example<toolchain><type/><provides> <version>1.0</version> </provides> <configuration/></toolchain>| JDK examples<toolchain><type>jdk</type><provides><version>1.5</version><vendor>sun</vendor></provides><configuration><jdkHome>/path/to/jdk/1.5</jdkHome></configuration></toolchain><toolchain><type>jdk</type><provides><version>1.6</version><vendor>sun</vendor></provides><configuration><jdkHome>/path/to/jdk/1.6</jdkHome></configuration></toolchain> -->
<!--插入下面代码--><toolchain><type>jdk</type><provides><version>1.6</version><vendor>sun</vendor></provides><configuration><!--这里是你安装jdk的文件目录--><jdkHome>C:\java\jdk1.6.0_10</jdkHome></configuration></toolchain>
</toolchains>