:art:修改系统配置表数据结构，添加数据库连接检测

src/main/java/cn/hellohao/TbedApplication.java

@@ -1,24 +1,23 @@
 package cn.hellohao;
 
-import javax.servlet.MultipartConfigElement;
-import javax.servlet.http.HttpServletRequest;
-
-import cn.hellohao.utils.Print;
+import cn.hellohao.dao.KeysMapper;
+import cn.hellohao.utils.FirstRun;
+import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.jdbc.DatabaseDriver;
 import org.springframework.boot.web.servlet.MultipartConfigFactory;
 import org.springframework.boot.web.servlet.ServletComponentScan;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.context.annotation.PropertySource;
+import org.springframework.jdbc.support.DatabaseStartupValidator;
 import org.springframework.scheduling.annotation.EnableScheduling;
 import org.springframework.transaction.annotation.EnableTransactionManagement;
 import org.springframework.util.unit.DataSize;
-import org.springframework.web.context.request.RequestContextHolder;
-import org.springframework.web.context.request.ServletRequestAttributes;
 
-import java.net.InetAddress;
-import java.util.Scanner;
+import javax.servlet.MultipartConfigElement;
+import javax.sql.DataSource;
+import java.util.stream.Stream;
 
 @SpringBootApplication
 @Configuration
@@ -30,6 +29,31 @@ public class TbedApplication {
 public static void main(String[] args) {
     SpringApplication.run(TbedApplication.class, args);
     }
+
+    //延缓Spring Boot启动时间直到数据库启动的方法
+    @Bean
+    public DatabaseStartupValidator databaseStartupValidator(DataSource dataSource) {
+        DatabaseStartupValidator databaseStartupValidator = new DatabaseStartupValidator();
+        databaseStartupValidator.setDataSource(dataSource);
+        databaseStartupValidator.setValidationQuery(DatabaseDriver.POSTGRESQL.getValidationQuery());
+        return databaseStartupValidator;
+    }
+    @Bean
+    public static BeanFactoryPostProcessor dependsOnPostProcessor() {
+        return bf -> {
+            // Let beans that need the database depend on the DatabaseStartupValidator
+            // like the JPA EntityManagerFactory or Flyway
+            String[] flyway = bf.getBeanNamesForType(FirstRun.class);
+            Stream.of(flyway)
+                    .map(bf::getBeanDefinition)
+                    .forEach(it -> it.setDependsOn("databaseStartupValidator"));
+
+            String[] jpa = bf.getBeanNamesForType(KeysMapper.class);
+            Stream.of(jpa)
+                    .map(bf::getBeanDefinition)
+                    .forEach(it -> it.setDependsOn("databaseStartupValidator"));
+        };
+    }
     /**
      * 文件上传配置
      * @return