java实现mysql数据库的备份及还原

最新推荐文章于 2025-09-22 15:11:49 发布

原创最新推荐文章于 2025-09-22 15:11:49 发布 · 1.3k 阅读

1 ·

CC 4.0 BY-SA版权

文章标签：

#mysql

备份数据专栏收录该内容

4 篇文章

订阅专栏

本文详细介绍了一种使用Java代码实现MySQL数据库备份和还原的方法。通过调用MySQL的mysqldump工具，将数据库导出为.sql文件进行备份，并利用mysql.exe工具将备份文件导入到数据库，实现了数据库的完整备份和恢复过程。

备份：

public static void backup() {
        try {
            Runtime rt = Runtime.getRuntime();
 
            // 调用 调用mysql的安装目录的命令
            Process child = rt
                    .exec("e:\\MySQL\\bin\\mysqldump -h localhost -uroot -p123 db_name");
            // 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("c:\\test.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("");
 
        } catch (Exception e) {
            e.printStackTrace();
        }
 
    }

还原:

public static void restore(String databaseName) {
        try {
            Runtime runtime = Runtime.getRuntime();
            Process process = runtime
                    .exec("e:\\MySQL\\bin\\mysql.exe -hlocalhost -uroot -p123 --default-character-set=utf8 "
                            + databaseName);
            OutputStream outputStream = process.getOutputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    new FileInputStream("C:\\test.sql"), "utf-8"));
            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();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }