So implementieren Sie Java, um unter springBoot automatisch Datenbanktabellen zu erstellen

# datasource
folivora.datasource.url=jdbc:mysql://localhost:3306/nfsj?useUnicode=true&characterEncoding=utf-8
folivora.datasource.username=root
folivora.datasource.password=123456
folivora.datasource.driver-class-name=com.mysql.jdbc.Driver

package cn.idatatech.folivora.modules.sys.common;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.annotation.PostConstruct;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Repository;

//SpringBoot单元测试启动类注解
//@RunWith(SpringRunner.class)
//@SpringBootTest
//@Component
@Repository  //继承自@Component,作用于持久层
/**
 * 如果配置文件没有在默认目录下，使用注解@PropertySource获取，下面演示的是在多配置文件中获取相同属性名的值，以后置为准
 * 单配置文件只要一个路径参数就可以
 */
//@PropertySource({"classpath:application.properties","classpath:config/config.properties"})  
public class InitSysAdminDivisions {

	@Value(value = "${folivora.datasource.driver-class-name}")
	private String driver;   
	
	@Value(value = "${folivora.datasource.url}")
	private String url;   
	
	@Value(value = "${folivora.datasource.username}")
	private String userName;
	
	@Value(value = "${folivora.datasource.password}")
	private String password;
	
	@PostConstruct
	public void init() throws SQLException, ClassNotFoundException{
		//连接数据库
		Class.forName(driver);
		//测试url中是否包含useSSL字段，没有则添加设该字段且禁用
		if( url.indexOf("?") == -1 ){
			url = url + "?useSSL=false" ;
		}
		else if( url.indexOf("useSSL=false") == -1 || url.indexOf("useSSL=true") == -1 )
		{
			url = url + "&useSSL=false";
		}
		Connection conn = DriverManager.getConnection(url, userName, password);
		Statement stat = conn.createStatement();
		//获取数据库表名
		ResultSet rs = conn.getMetaData().getTables(null, null, "sys_admin_divisions", null);
		
		// 判断表是否存在，如果存在则什么都不做，否则创建表
		if( rs.next() ){
			return;
		}
		else{
			// 先判断是否纯在表名，有则先删除表在创建表
//			stat.executeUpdate("DROP TABLE IF EXISTS sys_admin_divisions;CREATE TABLE sys_admin_divisions("
			//创建行政区划表
			stat.executeUpdate("CREATE TABLE sys_admin_divisions("
					+ "ID varchar(32) NOT NULL COMMENT "行政区划ID(行政区划代码)这里不使用32位的UUID,使用全数字的行政区域代码作为ID(如:440000)","
					+ "TYPE varchar(50) DEFAULT NULL COMMENT "类型（1省级 2市级 3区县）","
					+ "CODE varchar(50) DEFAULT NULL COMMENT "字母代码","
					+ "NAME varchar(100) DEFAULT NULL COMMENT "名称","
					+ "PINYIN varchar(100) DEFAULT NULL COMMENT "拼音","
					+ "PARENT_ID varchar(32) DEFAULT NULL COMMENT "上级行政区划数字代码","
					+ "IS_DISPLAY int(1) DEFAULT NULL COMMENT "是否显示( 0:否 1:是 )","
					+ "SORT bigint(20) DEFAULT NULL COMMENT "排序标识","
					+ "DEL_FLAG int(1) DEFAULT NULL COMMENT "删除标识(0:正常 1:已删除)","
					+ "PRIMARY KEY (ID)"
					+ ") ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT="行政区划 (省市区)";"
					);
		}
		// 释放资源
		stat.close();
        conn.close();
	}
}