ubuntu打开eclipse提示jdk环境变量缺失报错的解决

Ubuntu在安装完eclipse后打开有时会遇到找不到jdk环境变量的错误：

A Java RunTime Environment (JRE) or Java Development Kit (JDK) must be available in order to run Eclipse. No java virtual machine was found after searching the following locations

解决方案如下：

1. 进入eclipse，打开终端
2. mkdir jre
3. cd jre
4. ln -s /usr/lib/jvm/jdk1.7/bin bin   --(你的JDK目录)