Alibaba Cloud server deploys JavaWeb project

This article contains detailed steps to build the java environment of linux cloud server (jdk1.8, tomcat8, mysql) and deploy the javaweb project to the cloud server

1. Purchase Alibaba Cloud Server

Aliyun official website: https://www.aliyun.com/?utm_content=se_1007692031

2. Preparation

Download remote control tool Xshell and file transfer tool Xftp

Xshell official website download address https://www.netsarang.com/zh/all-downloads/

Xftp official website download address: https://www.netsarang.com/zh/xftp/
Download the linux version installation package of jdk and tomcat

Link: https://pan.baidu.com/s/1EnOerP_uT_mm3JpnlAwU5g
Extraction code: zbfr
Configure the security group of the cloud server

Enter the Alibaba Cloud console , find the security group configuration of this server, and open port 8080 and port 3306
Modify the jdbc database connection part of the java project

Change the connected local database to the Mysql database under port 3306 of the cloud server, for example:

Three, install JDK and Tomcat

3.1 download jdk1.8 and tomcat8

Pay attention to select the file with the suffix .tar.gz
3.2 Create a java directory and a tomcat directory under the /usr directory
```
cd /usr
mkdir java
mkdir tomcat
```
3.3 Use Xftp to upload jdk to java directory, and upload Tomcat to tomcat directory.
3.4 Unzip the jdk (note that the names of the following jdk can be different, you can use ls to view your own jdk)
```
tar -zvxf jdk-8u212-linux-x64.tar.gz
```
3.5 configure java environment variables
```
vim /etc/profile
```

Insert the following content into /etc/profile (note: the path and version number of the JDK depends on your version)

#set java environment
export JAVA_HOME=/usr/java/jdk1.8.0_212
export JRE_HOME=/usr/java/jdk1.8.0_212/jre 
export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH 
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$JAVA_HOME:$PATH

Make the configuration file effective

source /etc/profile

Check whether the configuration of the java environment has been changed to zero:

java -version

3.6 install tomcat

Unzip tomcat
```
tar -zvxf apache-tomcat-8.5.61.tar.gz
```
Enter the bin folder of the unzipped file
```
cd apache-tomcat-8.5.61/bin
```
Modify the setclasspath.sh file
```
vim setclasspath.sh
```
Insert the following into the file
```
#set java env
export JAVA_HOME=/usr/java/jdk1.8.0_212
export JRE_HOME=/usr/java/jdk1.8.0_212/jre
```
Start the tomcat server (under the bin folder of the Tomcat installation):
```
./startup.sh
```
3.7 Internet access

Now you can access your own Alibaba Cloud server through http://public IP address:8080 on the external network

If the following page is displayed, the configuration is successful:

If it cannot be displayed, it may be that port 8080 of the server is not open. Log in to the Alibaba Cloud console and modify the security group rules (see appendix).

Fourth, install Mysql database

4.1 Create msyql file under /usr
```
cd /usr
mkdir mysql
cd mysql
```

4.2 Download the RPM installation source

wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

4.3 Install MySQL source files

 yum localinstall -y mysql57-community-release-el7-11.noarch.rpm

4.4 Check whether the MySQL source is installed successfully
```
yum repolist enabled | grep "mysql.*-community.*"
```
The following is a successful installation:
4.5 Install Mysql service
```
 yum install -y mysql-community-server
```
4.6 Check whether the MySQL service is successfully installed
```
systemctl status mysqld
```
4.7 Start MySQL
```
systemctl start mysqld
```
4.8 Get root password

Due to the upgrade of Mysql security policy, the system will automatically set a random password after the installation is complete. Here we need to get this password first. Since the random password is more complicated, we will change the root password after we get the password and log in.
```
grep 'temporary password' /var/log/mysqld.log
```
4.9 Log in to MySQL
```
mysql -u root -p
```

4.10 Change password

alter user 'root'@'localhost' identified by 'Root@2020';

4.11 Turn off the MySQL password verification rules, so that you can set a simpler password

Since Mysql requires high password complexity by default (it must contain uppercase and lowercase letters, numbers, and symbols), you can turn off the Mysql password verification rules to allow you to set a simpler password, which is not explained here. Refer to 4.11 in the blog .

4.12 Configure remote user login

grant all privileges on *.* to 'root'@'%' identified by 'Root@2020' with grant option;

4.13 Set to automatically start MySQL when booting (here you need to exit MySQL)
```
 systemctl enable mysqld
 systemctl daemon-reload
```
4.14 Open the 3306 port of MySQL in the security group of Alibaba Cloud
4.15 Modify MySQL default character set encoding

View the current character set encoding of mysql:
4.16 Add the following content under [mysqld] in the /etc/my.cnf file
```
character_set_server=utf8
init_connect=’SET NAMES utf8’
```
4.17 Restart MySQL for the configuration to take effect
```
systemctl restart mysqld
```
4.18 View the revised results:
```
show variables like '%character%';
```

At this point, mysql has been installed and configured, and users can write data to MySQL

Five, upload war package and database file

I need to package the local Java Web project into a war, and export the local database to a sql file and upload it to the server.

5.1 Upload the war package to the linux server

Put the war package of the javaweb project into the /usr/tomcat/webapps directory. After tomcat runs, it will be automatically decompressed, and then you can use the path to access it.

Start tomcat (the startup file startup.sh is under tomcat/apache-tomcat-8.5.61/bin)
```
./bin/startup.sh
```
5.2 Upload the database script to the cloud server

Convert the local database to a sql file and upload it to the server via XFTP
5.3 execute sql

Enter mysql to execute the sql file through the following statement
```
source /root/shopping.sql
```
View current data sheet
```
show databases;
```
The database is already in the server database

At this point, the deployment of the entire project is complete

http://ip地址:8080/war包名Access through the address bar