系统版本：16.04.4

 sudo apt-get install tomcat7 直接tomcat启动提示JAVA_HOME环境没有配置 sudo apt-get install oracle-java8-installer 通过这个命令可以看到java安装路径：sudo update-alternatives --config java 直接设置/etc/enviroment没有作用 sudo vi /etc/default/tomcat7打开JAVA_HOME=.....的注释，并正确配置JAVA_HOMEJAVA_HOME=/usr/lib/jvm/java-8-oracle 启动后边提示fail记得查看日志,看看端口是否冲突 日志中有下面的警告信息WARNING: Problem with directory [/usr/share/tomcat7/common/classes], exists: [false], isDirectory: [false], canRead: [false]WARNING: Problem with directory [/usr/share/tomcat7/common], exists: [false], isDirectory: [false], canRead: [false]WARNING: Problem with directory [/usr/share/tomcat7/server/classes], exists: [false], isDirectory: [false], canRead: [false]WARNING: Problem with directory [/usr/share/tomcat7/server], exists: [false], isDirectory: [false], canRead: [false]WARNING: Problem with directory [/usr/share/tomcat7/shared/classes], exists: [false], isDirectory: [false], canRead: [false]WARNING: Problem with directory [/usr/share/tomcat7/shared], exists: [false], isDirectory: [false], canRead: [false]  解决：cd /usr/share/tomcat7sudo ln -s /var/lib/tomcat7/common commonsudo ln -s /var/lib/tomcat7/server serversudo ln -s /var/lib/tomcat7/shared shared 最后出现的警告信息：WARNING: A context path must either be an empty string or start with a '/' and do not end with a '/'. The path [/] does not meet these criteria and has been changed to []尚未解决