Question

如何用Java实现MySQL数据库的备份和恢复

Answer 1

直接黏贴在IDEA上按格式查看

package com.liuzy.javaopen.servlet;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 -pmysql goldenwing"); 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 -pmysql --default-character-set=utf8 goldenwing"); 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(); }}