2018年6月29日14:00:48
阅读数:1534
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。
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package com.hancai.base.admin.action;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.io.OutputStreamWriter;
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public class Test {
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public static void main(String[] args) throws IOException{
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backup("d:\\d.sql");
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recover("d:\\d.sql");
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}
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public static void backup(String path) throws IOException{
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Runtime runtime = Runtime.getRuntime();
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//-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
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Process process = runtime.exec("mysqldump -u root -p123456 family");
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InputStream inputStream = process.getInputStream();//得到输入流,写成.sql文件
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InputStreamReader reader = new InputStreamReader(inputStream);
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BufferedReader br = new BufferedReader(reader);
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String s = null;
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StringBuffer sb = new StringBuffer();
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while((s = br.readLine()) != null){
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sb.append(s+"\r\n");
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}
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s = sb.toString();
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System.out.println(s);
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File file = new File(path);
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file.getParentFile().mkdirs();
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FileOutputStream fileOutputStream = new FileOutputStream(file);
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fileOutputStream.write(s.getBytes());
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fileOutputStream.close();
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br.close();
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reader.close();
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inputStream.close();
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}
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public static void recover(String path) throws IOException{
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Runtime runtime = Runtime.getRuntime();
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//-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
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//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
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//错误信息:
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//mysql: Character set 'utf-8' is not a compiled character set and is not specified in the '
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//C:\Program Files\MySQL\MySQL Server 5.5\share\charsets\Index.xml' file ERROR 2019 (HY000): Can't
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// initialize character set utf-8 (path: C:\Program Files\MySQL\MySQL Server 5.5\share\charsets\),
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//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。
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Process process = runtime.exec("mysql -u root -p123456 --default-character-set=utf8 family");
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OutputStream outputStream = process.getOutputStream();
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BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(path)));
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String str = null;
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StringBuffer sb = new StringBuffer();
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while((str = br.readLine()) != null){
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sb.append(str+"\r\n");
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}
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str = sb.toString();
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System.out.println(str);
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OutputStreamWriter writer = new OutputStreamWriter(outputStream,"utf-8");
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writer.write(str);
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writer.flush();
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outputStream.close();
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br.close();
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writer.close();
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}
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}
下载地址:Java在线备份和还原MySQL数据库
转载请注明出处,谢谢!