Detailed graphic explanation of the steps and methods for installing jdk environment variables in TP5.1

thinkphp The framework tutorial column will introduce you to the installation of jdk environment variables in thinkphp5.1 and the learning summary of thinkphp5.1. I hope it will be helpful to friends in need!

First configuration changes and library class changes

Open debugging mode
5.1 configuration file is in the app/config folder // Application debugging mode in app.php under 'app_debug'=> false, change it to true.
Changes in library class calling
Original: use:think\Request; Now use:think\facade\Request;

You can use version 5.0 Method
$id = Request::instance()->param('id/d');

Verification issues in version 5.1

It keeps reporting that app/index/course->Validate;

The solution is to rewrite in model/Course.php:

Create database time zone problem

##java.sql.SQLException: The server time zone value 'Ãà ¹ú±êüñ¼ä' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.

---

Cause of time zone problemCause: When using mysql’s jdbc driver (6.0), problems caused by the time zone difference between the database and the system are encountered .

SolutionAdd
?serverTimezone=UTC

jdbcUrl=jdbc:mysql://localhost:3306/course?serverTimezone=UTC

If there is a Chinese garbled problem Solution

jdbcUrl=jdbc:mysql://localhost:3306/course?serverTimezone=Asia/Shanghai&characterEncoding=utf8

Environment variable installation

##JAVA_HOME: JDK installation directory

Function: Other related environment variable configurations can be referenced, which is more convenient and concise.
Path:%JAVA_HOME%bin;%JAVA_HOME%jrebin;
Function: Allow the system to find and call java.exe and javac.exe.
classpath:.;%JAVA_HOME%libdt.jar;%JAVA_HOME%libtools.jar
Function: The role of the classpath environment variable--tell the java virtual machine that all executable files.class Where

Let us make sure the installation is successful

Press the shortcut key Win R, enter cmd, and press Enter.
Check whether the Java environment is configured successfully

Enter

java

Then we enter

javac

Finally, enter

java -version

You can see the above three pictures, and the environment variables are configured. .

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