2018年6月29日14:00:48
今天整了整整一整天,终于使用Java在线备份和还原MySQL数据库了,哎,备份倒是很快,就是在还原的时候遇到了一个问题,也不报错,结果将sql语句放到cmd中一运行才知道是编码的问题,下面代码。
首先将将Mysql的环境变量配上:你的mysql安装目录\bin;,放到系统变量中path变量中,最好是开始Mysql的远程连接的功能,将mysql数据库中的user表中的你连接mysql的用户的host字段设置为%号。
- package com.hancai.base.admin.action;
-
- 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();
- }
- }
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