下载软件
Openjdk下载：https://github.com/happycuiqq/openJdk8
由于编译Openjdk是需要引导JDK（比OpenJdk的版本低）, 我们需要下载一个引导JDK : https://www.oracle.com/java/technologies/javase/javase7-archive-downloads.html
配置环境变量
如图引导jdk环境变量配置:
安装编译环境
yum -y install zlib zlib-devel yum -y install bzip2 bzip2-devel yum -y install ncurses ncurses-devel yum -y install readline readline-devel yum -y install openssl openssl-devel yum -y install openssl-static yum -y install xz lzma xz-devel yum -y install sqlite sqlite-devel yum -y install gdbm gdbm-devel yum -y install bzip2 bzip2-devel yum -y install ncurses ncurses-devel yum -y install readline readline-devel yum -y install openssl openssl-devel yum -y install openssl-static yum -y install xz lzma xz-devel yum -y install sqlite sqlite-devel yum -y install gdbm gdbm-devel yum -y install tk tk-devel yum -y install libffi-devel yum groupinstall "Development Tools" yum install libXtst-devel libXt-devel libXrender-devel yum install cups-devel yum install alsa-lib-devel cups-devel libX* gcc gcc-c++ freetype-devel libstdc++-static ant make
编译
openjdk下的文件configure赋予执行权限
chmod +x configure bash ./configure --with-target-bits=64 --with-boot-jdk=/usr/java/jdk1.7.0_80/ --with-debug-level=slowdebug --enable-debug-symbols ZIP_DEBUGINFO_FILES=0
参数说明：
–with-target-bits=64 ：指定生成64位jdk；
–with-boot-jdk=/usr/java/jdk1.7.0_80 ：引导jdk的路径；
–with-debug-level=slowdebug：编译时的级别
–enable-debug-symbols ZIP_DEBUGINFO_FILES=0：生成调试的符号信息，并且不压缩
进行编译：
次阶段需要等待
make clean make all ZIP_DEBUGINFO_FILES=0
最终出现如图，编译成功
进入openjdk执行命令，可以看到相对应的版本信息
