添加MySQL配置，并跑通项目

backend/src/main/java/com/cxyxiaomo/entrance/Application.java

@@ -6,8 +6,8 @@ import org.springframework.boot.autoconfigure.SpringBootApplication;
 @SpringBootApplication
 public class Application {
 
-	public static void main(String[] args) {
-		SpringApplication.run(Application.class, args);
-	}
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
 
 }

backend/src/main/resources/application.properties

@@ -1 +1,5 @@
-
+# MySQL配置
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+spring.datasource.url=jdbc:mysql://127.0.0.1:3306/epp?useUnicode=true&characterEncoding=utf8&useSSL=false
+spring.datasource.username=root
+spring.datasource.password=root

backend/src/test/java/com/cxyxiaomo/entrance/ApplicationTests.java

@@ -6,8 +6,8 @@ import org.springframework.boot.test.context.SpringBootTest;
 @SpringBootTest
 class ApplicationTests {
 
-	@Test
-	void contextLoads() {
-	}
+    @Test
+    void contextLoads() {
+    }
 
 }