How to configure Java environment variables and Tomcat server

Step one: Configure jdk environment variables consistent with the system (32-bit/64-bit)

(1) Download the jdk installation package from the official website:

Official website download address:

Choose the corresponding installation package according to your operating system (be sure to accept the license agreement)

(2) Install jdk:

Install jdk. Select the installation directory. During the installation process, two installation prompts will appear. The first time is to install jdk, and the second time is to install jre. It is recommended to install both in different folders within the same java folder. (They cannot both be installed in the root directory of the java folder. An error will occur if jdk and jre are installed in the same folder)

The installation is completed as shown in the figure below

(3) Configure environment variables

Configure environment variables after installing jdk Computer→Properties→Advanced System Settings→Advanced→Environment Variables

System variables→New java-home variable.

Fill in the installation directory of jdk with the variable value (I am c:\programfiles\java\jdk1.8.0_111)

System variables→Look for path variables→ Edit

Enter %java-home%\bin;

at the end of the variable value (note whether there is a ; sign at the end of the variable value of the original path. If not, enter the ; sign first and then enter the above Code)

System variables→Create new classpath variable

Fill in the variable value .;%java-home%\lib;%java-home%\lib\ tools.jar (note the dot at the front)

System variables are configured.

Second step: Verify whether jdk is configured successfully (32-bit/64-bit)

Verify whether the configuration is successful. Run cmd and enter java -version (between java and -version There are spaces between them)

If the version information is displayed as shown in the figure, the installation and configuration are successful.

64-bit is as shown below, there will be a clear version comment, if not, it will be 32-bit

##Step Three: tomcat9 installation and configuration

(1) Download tomcat9 from the official website

Download the latest version of tomcat

No installation is required after downloading. After decompressing this configuration demonstration, I placed it in the d:\program files\apache-tomcat-9.0.0.m15 directory.

Note that 32 is located in a 64-bit jdk, otherwise a specific error 1 will be reported when starting tomcat

(2) cmd command to configure tomcat

(3) Four ways to start tomcat

1. Double-click startup.bat batch processing in the bin directory to run tomcat (The advantage of this is that you can see the running status, the database appears, and the code reports errors. Recommended)

2. Run cmd as an administrator to run the net starttomcat9 command (9 is the version number)

3. Run through the service in the task manager

4. Double-click tomcat9w.exe in the bin directory to check in and click start to run tomcat. The demonstration picture is as follows:

(4) Successful demonstration

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