centos 7中设置tomcat 7为系统服务的方法详解

vi /etc/profile 
追加以下内容 
export JAVA_HOME=/usr/jdk1.7.0_72 
export PATH=$JAVA_HOME/bin:$PATH 
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar 

[Unit] 
Description=Tomcat7 
After=syslog.target network.target remote-fs.target nss-lookup.target 
  
[Service] 
Type=forking 
Environment='JAVA_HOME=/usr/jdk1.7.0_72' 
Environment='CATALINA_PID=/usr/apache-tomcat-7.0.70/bin/tomcat.pid' 
Environment='CATALINA_HOME=/usr/apache-tomcat-7.0.70/' 
Environment='CATALINA_BASE=/usr/apache-tomcat-7.0.70/' 
Environment='CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC' 
 
WorkingDirectory=/usr/apache-tomcat-7.0.70/ 
 
ExecStart=/usr/apache-tomcat-7.0.70/bin/startup.sh 
ExecReload=/bin/kill -s HUP $MAINPID 
ExecStop=/bin/kill -s QUIT $MAINPID 
PrivateTmp=true 
  
[Install] 
WantedBy=multi-user.target 

[root@localhost merrick]# systemctl status tomcat7 
● tomcat7.service - Tomcat7 
 Loaded: loaded (/usr/lib/systemd/system/tomcat7.service; disabled; vendor preset: disabled) 
 Active: active (running) since 四 2016-09-08 11:34:16 CST; 17min ago 
 Process: 3231 ExecStop=/bin/kill -s QUIT $MAINPID (code=exited, status=0/SUCCESS) 
 Process: 3239 ExecStart=/usr/apache-tomcat-7.0.70/bin/startup.sh (code=exited, status=0/SUCCESS) 
 Main PID: 3249 (java) 
 CGroup: /system.slice/tomcat7.service 
   └─3249 /usr/jdk1.7.0_72/bin/java -Djava.util.logging.config.file=/usr/apache-tomcat-7.0.70//conf/logging.properties -D... 
 
9月 08 11:34:16 localhost.localdomain startup.sh[3239]: Using CATALINA_BASE: /usr/apache-tomcat-7.0.70/ 
9月 08 11:34:16 localhost.localdomain startup.sh[3239]: Using CATALINA_HOME: /usr/apache-tomcat-7.0.70/ 
9月 08 11:34:16 localhost.localdomain startup.sh[3239]: Using CATALINA_TMPDIR: /usr/apache-tomcat-7.0.70//temp 
9月 08 11:34:16 localhost.localdomain startup.sh[3239]: Using JRE_HOME:  /usr/jdk1.7.0_72 
9月 08 11:34:16 localhost.localdomain startup.sh[3239]: Using CLASSPATH:  /usr/apache-tomcat-7.0.70//bin/bootstrap.jar...i.jar 
9月 08 11:34:16 localhost.localdomain startup.sh[3239]: Using CATALINA_PID: /usr/apache-tomcat-7.0.70/bin/tomcat.pid 
9月 08 11:34:16 localhost.localdomain startup.sh[3239]: Existing PID file found during start. 
9月 08 11:34:16 localhost.localdomain startup.sh[3239]: Removing/clearing stale PID file. 
9月 08 11:34:16 localhost.localdomain startup.sh[3239]: Tomcat started. 
9月 08 11:34:16 localhost.localdomain systemd[1]: Started Tomcat7. 
Hint: Some lines were ellipsized, use -l to show in full. 

[root@localhost merrick]# wget http://localhost:8080/ 
--2016-09-08 11:54:47-- http://localhost:8080/ 
正在解析主机 localhost (localhost)... ::1, 127.0.0.1 
正在连接 localhost (localhost)|::1|:8080... 已连接。 
已发出 HTTP 请求，正在等待回应... 200 OK 
长度：未指定 [text/html] 
正在保存至: “index.html” 
 
 [ <=>                      ] 11,197  --.-K/s 用时 0s  
 
2016-09-08 11:54:47 (245 MB/s) - “index.html” 已保存 [11197]