Testing the Application

Use the modified startup script to launch the application service and monitor the logs. If no error messages are logged, it indicates that the encryption plugin has been loaded successfully; this is shown in Figure 1.

Figure 1 Program runtime log

By using tools such as Postman to invoke the application's APIs, it can be observed that the encrypted data originally retrieved from the database has been returned in plaintext, as shown in Figure 2.

Figure 2 The result is displayed in plain text.