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();
	}
}