How does navicat process data in batches?
一、使用excel表格
1.打开数据表,按照表的字段在excel中添加数据。注意:表中字段名必须和excel中的名称一致。
2.打开navicat,在表结构处右键选择“导入向导”,选择excel文件,找到excel文件所在的位置。注意:一个excel表格里可以有多个sheet,所以如果全选中的话,可以一次性分别导入多个数据表,但是一定要保证字段名不要错,否则导入的时候会显示错误。
相关推荐:《Navicat for mysql使用图文教程》
3.选择下一步,到设置附加选项时,“栏位名称”是excel中字段的那一行,“第一个数据行”是数据开始的那一行。
4.下一步,选择“开始”,执行之后,选择“关闭”。
5.在数据表中刷新,发现数据就都导进来了。
二、使用insert语句(FileWriter批量写入)
定义一个写语句到文件的方法,在for循环里面定义自己需要的格式。在这里笔者想让时间变化,于是写了一个让时间减一的方法,其实在这张表里时间无所谓,但是在文章开头笔者有提到,当需要添加一年的数据时,或者某一段时间的每一天都要添加时,就有必要定义这个方法了。
import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.sql.Date; import java.text.SimpleDateFormat; import java.util.Calendar; public class UserTest { public static void main(String[] args) { try { writeToFile(); //readFromFile(); } catch (IOException e) { e.printStackTrace(); } } /** * DOC 往文件里写入数据. * * @throws IOException */ private static void writeToFile() throws IOException { String writerContent = "";// 要写入的文本 File file = new File("F:\\user.txt");// 要写入的文本文件 if (!file.exists()) {// 如果文件不存在,则创建该文件 file.createNewFile(); } FileWriter writer = new FileWriter(file);// 获取该文件的输出流 for (int i = 0 ;i < 10; i ++ ) { writerContent = "insert into `user` VALUES ("+"'"+(i + 1)+"'," +"yystrong"+i+"',"+"'111'," +"'"+calcTime("", -(i+1))+"'"+"'0',"+"'0',"+"'"+calcTime("", -(i+1))+"'" + "\r\n"; writer.write(writerContent);// 写内容 } writer.flush();// 清空缓冲区,立即将输出流里的内容写到文件里 writer.close();// 关闭输出流,施放资源 } /** * * @param type 往前计算的类型(week、month、year,“”表示day * @param count 往前计算的数量 * @return */ private static String calcTime(String type ,int count){ SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Calendar calendar = Calendar.getInstance(); if (type .equals("week")) { //周 calendar.add(Calendar.WEEK_OF_YEAR, count); }else if (type .equals("month")) { //月 calendar.add(Calendar.MONTH, count); }else if (type .equals("year")) { //12个月 calendar.add(Calendar.MONTH, count); }else { //日 calendar.add(Calendar.DATE, count); } java.util.Date date = calendar.getTime(); return sdf.format(date); } }
执行之后,在f盘的根目录下就会创建一个user.txt的文件夹,里面有insert语句,然后在navicat里面选择ctrl+q打开执行框,复制进去之后选择运行,同样可以导入数据。
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