java备份和恢复数据代码例子

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.io.OutputStreamWriter;

 

 

 

public class Test {

     public static void main(String[] args) throws IOException{

         backup( "d:\\d.sql" );

         recover( "d:\\d.sql" );

     }

     public static void backup(String path) throws IOException{

         Runtime runtime = Runtime.getRuntime();

         //-u后面是用户名，-p是密码-p后面最好不要有空格，-family是数据库的名字

         Process process = runtime.exec( "mysqldump -u root -p123456 family" );

         InputStream inputStream = process.getInputStream(); //得到输入流，写成.sql文件

         InputStreamReader reader = new InputStreamReader(inputStream);

         BufferedReader br = new BufferedReader(reader);

         String s = null ;

         StringBuffer sb = new StringBuffer();

         while ((s = br.readLine()) != null ){

             sb.append(s+ "\r\n" );

         }

         s = sb.toString();

         System.out.println(s);

         File file = new File(path);

         file.getParentFile().mkdirs();

         FileOutputStream fileOutputStream = new FileOutputStream(file);

         fileOutputStream.write(s.getBytes());

         fileOutputStream.close();

         br.close();

         reader.close();

         inputStream.close();

     }

     public static void recover(String path) throws IOException{

         Runtime runtime = Runtime.getRuntime();

         //-u后面是用户名，-p是密码-p后面最好不要有空格，-family是数据库的名字，--default-character-set=utf8，这句话一定的加

         //我就是因为这句话没加导致程序运行成功，但是数据库里面的内容还是以前的内容，最好写上完成的sql放到cmd中一运行才知道报错了

         //错误信息：

         //mysql: Character set 'utf-8' is not a compiled character set and is not specified in the '

         //C:\Program Files\MySQL\MySQL Server 5.5\share\charsets\Index.xml' file ERROR 2019 (HY000): Can't

         // initialize character set utf-8 (path: C:\Program Files\MySQL\MySQL Server 5.5\share\charsets\)，

         //又是讨人厌的编码问题，在恢复的时候设置一下默认的编码就可以了。

         Process process = runtime.exec( "mysql -u root -p123456 --default-character-set=utf8 family" );

         OutputStream outputStream = process.getOutputStream();

         BufferedReader br = new BufferedReader( new InputStreamReader( new FileInputStream(path)));

         String str = null ;

         StringBuffer sb = new StringBuffer();

         while ((str = br.readLine()) != null ){

             sb.append(str+ "\r\n" );

         }

         str = sb.toString();

         System.out.println(str);

         OutputStreamWriter writer = new OutputStreamWriter(outputStream, "utf-8" );

         writer.write(str);

         writer.flush();

         outputStream.close();

         br.close();

         writer.close();

     }

}