修改maven一更新jre就变成1.5版本

<build>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

                <version>2.1</version>

                <configuration>

                    <source>1.7</source>

                    <target>1.7</target>

                </configuration>

            </plugin>

        </plugins>

    </build>

除此之外还消除了failOnMissingWebXml错误

附阿里的settings.xml

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

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="         http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">

  <!--本地仓库。该值表示构建系统本地仓库的路径。其默认值为~/.m2/repository。 -->

  <localRepository>E:\softs\maven\repository</localRepository>

  <!--Maven是否需要和用户交互以获得输入。如果Maven需要和用户交互以获得输入，则设置成true，反之则应为false。默认为true。

 <interactiveMode>true</interactiveMode>

 -->

<mirrors>

    <mirror>

      <id>alimaven</id>

      <name>aliyun maven</name>

      <url>http://maven.aliyun.com/nexus/content/groups/public/</url>

      <mirrorOf>central</mirrorOf>

    </mirror>

  </mirrors>

  <profiles>

  <profile>

                <id>jdk-1.6</id>

                <activation>

                    <jdk>1.6</jdk>

                </activation>

                <repositories>

                    <repository>

                        <id>nexus</id>

                        <name>local private nexus</name>

                        <url>http://maven.oschina.net/content/groups/public/</url>

                        <releases>

                            <enabled>true</enabled>

                        </releases>

                        <snapshots>

                            <enabled>false</enabled>

                        </snapshots>

                    </repository>

                </repositories>

                <pluginRepositories>

                    <pluginRepository>

                        <id>nexus</id>

                        <name>local private nexus</name>

                        <url>http://maven.oschina.net/content/groups/public/</url>

                        <releases>

                            <enabled>true</enabled>

                        </releases>

                        <snapshots>

                            <enabled>false</enabled>

                        </snapshots>

                    </pluginRepository>

                </pluginRepositories>

            </profile>

  </profiles>

  <!-- -->

  <activeProfiles>

    <activeProfile>nexus</activeProfile>

  </activeProfiles>

</settings>

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

<lifecycleMappingMetadata>

  <lifecycleMappings>

    <lifecycleMapping>

      <packagingType>war</packagingType>

      <lifecycleMappingId>org.eclipse.m2e.jdt.JarLifecycleMapping</lifecycleMappingId>

    </lifecycleMapping>

  </lifecycleMappings>

  <pluginExecutions>

    <!--  standard maven plugins -->

    <pluginExecution>

      <pluginExecutionFilter>

        <groupId>org.apache.maven.plugins</groupId>

        <artifactId>maven-resources-plugin</artifactId>

        <goals>

          <goal>testCompile</goal>

          <goal>compile</goal>

        </goals>

        <versionRange>[3.1,)</versionRange>

      </pluginExecutionFilter>

      <action>

         <ignore/>

      </action>

    </pluginExecution>

  </pluginExecutions>

  <profiles>

    <profile>

        <id>downloadSources</id>

        <properties>

            <downloadSources>true</downloadSources>

            <downloadJavadocs>true</downloadJavadocs>

        </properties>

    </profile>

  </profiles>  

    <activeProfiles>

      <activeProfile>downloadSources</activeProfile>

    </activeProfiles>

  <mirrors>

    <mirror>

      <id>alimaven</id>

      <name>aliyun maven</name>

      <url>http://maven.aliyun.com/nexus/content/groups/public/</url>

      <mirrorOf>central</mirrorOf>

    </mirror>

  </mirrors>

</lifecycleMappingMetadata>