mysql备份数据库

package com.pdsu.mysql.backup;
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 BackupTest {

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

//backup("G:\\backup\\d.sql");

recover("G:\\backup\\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 -proot tt");

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 -proot --default-character-set=utf8 tt");

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();

}

}