进入mysql命令行
如果出现不允许外部文件的导入可以
在mysql客户端输入:

set global local_infile=1;

准备好实验数据

 public static void main(String[] args) throws IOException {
        BuffwTest buffwTest=new BuffwTest();
        for (int i = 0; i < 10; i++) {
            buffwTest.writeFile();
        }
    }

    public void writeFile() throws IOException {
        File file = new File("D:/database.txt");
        FileWriter fileWriter=new FileWriter(file,true);
        BufferedWriter bufferedWriter1=new BufferedWriter(fileWriter);
        for (int i = 0; i < 50000; i++) {
            bufferedWriter1.write("\n2022-09-19 10:04:14||0||1||699||0||2022-09-19 10:34:14||2022-09-19 10:04:14");
        }
        fileWriter.close();

    }

执行完成 文件大小约36MB
大约50万条数据

执行sql 下面的部分语句的意思是：
文件位置
需要插入的表
字符编码
字段分隔符
文本限定符
转义符
记录分隔符
每一行文本按顺序对应的表字段

load data local infile 'D:/database.txt' 
into table `order` 
CHARACTER SET utf8mb4
 FIELDS TERMINATED BY '||' 
 OPTIONALLY ENCLOSED BY '' 
 ESCAPED BY '\\' 
 LINES TERMINATED BY '\n'
(date,user_id,state,actualPayment,busId,endTime,createTime)

影响行数

插入成功