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+" ");

        }

        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 FilesMySQLMySQL Server 5.5sharecharsetsIndex.xml' file ERROR 2019 (HY000): Can't

        // initialize character set utf-8 (path: C:Program FilesMySQLMySQL Server 5.5sharecharsets)，

        //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+" ");

        }

        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();

    }

}