修改项目.project文件，确保有maven2Builder和maven2Nature2个标签：
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>projectName</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.m2e.core.maven2Builder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
<nature>org.eclipse.m2e.core.maven2Nature</nature>
</natures>
</projectDescription>
.classpath 文件 :
<classpath>
<classpathentry kind="src" path="src/test/java"
output="target/test-classes" including="**/*.java"/>
<classpathentry kind="src" path="src/main/java" including="**/*.java"/>
<classpathentry kind="output" path="target/classes"/>
<classpathentry kind="var" path="M2_REPO/junit/junit/3.8.1/junit-3.8.1.jar"
sourcepath="M2_REPO/junit/junit/3.8.1/junit-3.8.1-sources.jar"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
</classpath>
eclipse 中maven项目右键没有maven菜单问题
原文：http://www.cnblogs.com/wxwBlog/p/5737930.html
