实战案例：自动的应用部署
1. 制作应用的war包文件
[root@centos8 ~]#ls /data/testapp2/
test.html test.jsp
[root@centos8 ~]#cat /data/testapp2/test.html
<h1>This is test html </h1>
[root@centos8 ~]#cat /data/testapp2/test.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>jsp例子</title>
</head>
<body>
后面的内容是服务器端动态生成字符串，最后拼接在一起
<%
out.println("hello jsp");
%>
</body>
</html>[root@centos8 ~]#cd /data/testapp2/
#生成war包文件
[root@centos8 testapp2]#jar cvf /data/testapp2.war *
added manifest
adding: test.html(in = 28) (out= 27)(deflated 3%)
adding: test.jsp(in = 329) (out= 275)(deflated 16%)
[root@centos8 testapp]#cd /data/testapp2/
[root@centos8 testapp]#ls
test.html test.jsp
[root@centos8 testapp2]#cd /data/
[root@centos8 data]#ls
testapp testapp.war
[root@centos8 data]#file testapp2.war
testapp.war: Java archive data (JAR)
[root@centos8 data]#chown tomcat.tomcat /data/testapp2.war2、自动应用部署上面的war包
[root@centos8 tomcat]#pwd
/usr/local/tomcat
[root@centos8 tomcat]#ls webapps/
docs examples host-manager manager ROOT
[root@centos8 tomcat]#ls work/Catalina/localhost/
docs examples host-manager manager ROOT
[root@centos8 tomcat]#chown tomcat.tomcat /data/testapp2.war
[root@centos8 tomcat]#cp -p /data/testapp2.war webapps/
#再次查看，tomcat将testapp.war自动解压缩
[root@centos8 tomcat]#ll webapps/
total 8
drwxr-x--- 15 tomcat tomcat 4096 Feb 9 11:02 docs
drwxr-x--- 6 tomcat tomcat 83 Feb 9 11:02 examples
drwxr-x--- 5 tomcat tomcat 87 Feb 9 11:02 host-manager
drwxr-x--- 5 tomcat tomcat 103 Feb 9 11:02 manager
drwxr-x--- 3 tomcat tomcat 300 Feb 9 19:59 ROOT
drwxr-x--- 3 tomcat tomcat 55 Feb 9 20:14 testapp2
-rw-r--r-- 1 tomcat tomcat 862 Feb 9 20:05 testapp2.war
[root@centos8 tomcat]#ll webapps/testapp2
total 8
drwxr-x--- 2 tomcat tomcat 44 Feb 9 20:14 META-INF
-rw-r----- 1 tomcat tomcat 28 Feb 9 20:03 test.html
-rw-r----- 1 tomcat tomcat 329 Aug 30 02:30 test.jsp
#work目录会自动生成对应的testapp的子目录，但目录内无内容
[root@centos8 tomcat]#tree work/Catalina/localhost/testapp/
work/Catalina/localhost/testapp2/
0 directories, 0 files
#访问jsp文件后，tomcat会自动将jsp转换和编译生成work目录下对应的java和class文件
[root@centos8 tomcat]#curl http://127.0.0.1:8080/testapp2/test.jsp
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>jsp例子</title>
</head>
<body>
后面的内容是服务器端动态生成字符串，最后拼接在一起
hello jsp
</body>
</html>[root@centos8 ttree work/Catalina/localhost/testapp2/
work/Catalina/localhost/testapp2/
└── org
└── apache
└── jsp
├── test_jsp.class
└── test_jsp.java
3 directories, 2 files
[root@centos8 tomcat]#curl http://127.0.0.1:8080/testapp2/test.html
<h1>This is test html </h1>
[root@centos8 tomcat]#tree work/Catalina/localhost/testapp/
work/Catalina/localhost/testapp2/
└── org
└── apache
└── jsp
├── test_jsp.class
└── test_jsp.java
3 directories, 2 files
#自动删除（反部署）
#[root@centos8 tomcat]#rm -f webapps/testapp2.war
[root@centos8 tomcat]#ls webapps/
docs examples host-manager manager ROOT testapp2
#过几秒再查看，发现testapp2目录也随之删除
[root@centos8 tomcat]#ls webapps/
docs examples host-manager manager ROOT
[root@centos8 tomcat]#ls webapps/
docs examples host-manager manager ROOT
[root@centos8 tomcat]#ls work/Catalina/localhost/
docs examples host-manager manager ROOT
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