完善章节4单元测试

chapter-4-spring-boot-validating-form-input/src/main/resources/application.properties

@@ -1,2 +1,15 @@
+## 开启 H2 数据库
+spring.h2.console.enabled=true
+
+## 配置 H2 数据库连接信息
+spring.datasource.url=jdbc:h2:mem:testdb  
+spring.datasource.driverClassName=org.h2.Driver  
+spring.datasource.username=sa  
+spring.datasource.password=
+
+
+
 ## 是否显示 SQL 语句
-spring.jpa.show-sql=true
+spring.jpa.show-sql=true
+hibernate.dialect=org.hibernate.dialect.H2Dialect
+hibernate.hbm2ddl.auto=create