We know that jspStudy comes with jdk, version 1.7. My project needs to use 1.8, so it needs to be replaced. However, when I tried to replace it with the downloaded file in the jdk/jre folder, I found that Tomcat could not start!
Install JDK. Select the installation directory. Installation prompts will appear twice during the installation process. 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)
JDK installation and environment variable configuration
1: Install jdk and choose the directory at will. Just modify the directory before the default installation directory java
2: Install jre → change → java. The previous directory is the same as the directory where jdk is installed
Note: If there is no installation directory requirement, all default settings can be used. There is no need to make any modifications, just click Next twice.
JDK installation and environment variable configuration
JDK installation and environment variable configuration
After installing JDK, configure environment variables Computer→Properties→Advanced System Settings→Advanced→Environment Variables
JDK installation and environment variable configuration
System Variables→New JAVA_HOME variable.
Fill in the jdk installation directory with variable value (I am E:Javajdk1.7.0)
System variables → Find Path variable → Edit
Enter %JAVA_HOME%bin;%JAVA_HOME%jrebin; at the end of the variable value
(Pay attention to whether there is a ; sign at the end of the original Path variable value. If not, enter the ; sign first and then enter the above code)
JDK installation and environment variable configuration
System variables→Create new CLASSPATH variable
Fill in the variable value .;%JAVA_HOME%lib;%JAVA_HOME%libtools.jar (note the dot at the front)
System variables are configured
JDK installation and environment variable configuration
7
Check whether the configuration is successful. Run cmd and enter java -version (there is a space between java and -version)
If the version information is displayed as shown in the figure, the installation and configuration are successful.
replyThere seems to be no specific answer.
Note that I want to replace the JDK of jspStudy.
PS. My jspStudy installation path is D:jspStudy. After installation, it comes with JDK, the path is: D:jspStudyJDK. There is only one folder jre under it, and there are only two folders bin and lib in jre.
The JDK I need to replace is this JDK.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
I hope the official will come forward to solve it, or if it can't be solved, please explain it!
More than a year later, it still remains unresolved. . .
Install JDK. Select the installation directory. Installation prompts will appear twice during the installation process. 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)
JDK installation and environment variable configuration
1: Install jdk and choose the directory at will. Just modify the directory before the default installation directory java
2: Install jre → change → java. The previous directory is the same as the directory where jdk is installed
Note: If there is no installation directory requirement, all default settings can be used. There is no need to make any modifications, just click Next twice.
JDK installation and environment variable configuration
JDK installation and environment variable configuration
After installing JDK, configure environment variables Computer→Properties→Advanced System Settings→Advanced→Environment Variables
JDK installation and environment variable configuration
System Variables→New JAVA_HOME variable.
Fill in the jdk installation directory with variable value (I am E:Javajdk1.7.0)
System variables → Find Path variable → Edit
Enter %JAVA_HOME%bin;%JAVA_HOME%jrebin;
at the end of the variable value
(Pay attention to whether there is a ; sign at the end of the original Path variable value. If not, enter the ; sign first and then enter the above code)
JDK installation and environment variable configuration
System variables→Create new CLASSPATH variable
Fill in the variable value .;%JAVA_HOME%lib;%JAVA_HOME%libtools.jar (note the dot at the front)
System variables are configured
JDK installation and environment variable configuration
7
Check whether the configuration is successful. Run cmd and enter java -version (there is a space between java and -version)
If the version information is displayed as shown in the figure, the installation and configuration are successful.