编译安装hadoop-2.7.5

源码包下载地址：hadoop-2.7.5-src.tar.gz

配置JDK环境
Linux配置JDK环境安装maven
下载地址：maven

mkdir /usr/local/maven
tar zxvf apache-maven-3.0.5-bin.tar.gz -C /usr/local/maven/
vi /etc/profile
##后面添加
export MAVEN_HOME=/usr/local/maven/apache-maven-3.0.5
export MAVEN_OPTS="-Xms4096m -Xmx4096m"
export PATH=:$MAVEN_HOME/bin:$PATH

source /etc/profile
mvn --version