java实现mysql数据库的备份及还原,已测试通过

package com.baidu.entry;

import java.io.BufferedReader;

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 Demo2 {

public static void backup() {

        try {

            Runtime rt = Runtime.getRuntime();
            Process child = rt.exec(" mysqldump -h localhost -P3308 -uroot -p123 test sys_logs");

test是数据库名称，sys_logs是表名

            // 设置导出编码为utf-8。这里必须是utf-8

            // 把进程执行中的控制台输出信息写入.sql文件，即生成了备份文件。注：如果不对控制台信息进行读出，则会导致进程堵塞无法运行

            InputStream in = child.getInputStream();// 控制台的输出信息作为输入流

            InputStreamReader xx = new InputStreamReader(in, "utf-8");

            // 设置输出流编码为utf-8。这里必须是utf-8，否则从流中读入的是乱码

            String inStr;

            StringBuffer sb = new StringBuffer("");

            String outStr;

            // 组合控制台输出信息字符串

            BufferedReader br = new BufferedReader(xx);

            while ((inStr = br.readLine()) != null) {

                sb.append(inStr + "\r\n");

            }

            outStr = sb.toString();

            // 要用来做导入用的sql目标文件：

            FileOutputStream fout = new FileOutputStream("D:\\testzl222.sql");

            OutputStreamWriter writer = new OutputStreamWriter(fout, "utf-8");

            writer.write(outStr);

            writer.flush();

            in.close();

            xx.close();

            br.close();

            writer.close();

            fout.close();

            System.out.println("数据库备份成功");

 

        } catch (Exception e) {

            e.printStackTrace();

            System.out.println("数据库备份失败");

        }

 

    }

public static void restore(String path) {
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;
try {
process = runtime.exec("mysql -h192.168.19.49 -P3308 -uroot -p123 tsoc");
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();
System.out.println("数据库恢复成功");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("数据库恢复失败");
}

    }

public static void main(String[] args) {

//backup();
restore("D:\\testzl222.sql");

}

}