public class SqlBackup {
  public static void main(String[] args) {
    //backup();
    load();
  }

  public static void backup() {
    try {
      Runtime rt = Runtime.getRuntime();

      // 调用 mysql 的 cmd:
      Process child = rt
              .exec("mysqldump  -uroot -hlocalhost -p123456 --set-charset=utf8 -t test");// 设置导出编码为utf8。这里必须是utf8。-t是导出数据不导出结构，-d导出结构不导出数据，没有则既导出数据又导出结构
     
      // 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, "utf8");// 设置输出流编码为utf8。这里必须是utf8，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(
              "e:/test.sql");
      OutputStreamWriter writer = new OutputStreamWriter(fout, "utf8");
      writer.write(outStr);
      // 注：这里如果用缓冲方式写入文件的话，会导致中文乱码，用flush()方法则可以避免
      writer.flush();

      // 别忘记关闭输入输出流
      in.close();
      xx.close();
      br.close();
      writer.close();
      fout.close();

      System.out.println("/* Output OK! */");

    } catch (Exception e) {
        e.printStackTrace();
    }

  }

  public static void load() {
    try {
      String fPath = "e:/test.sql";
      Runtime rt = Runtime.getRuntime();

      // 调用 mysql 的 cmd:
      Process child = rt.exec("mysql -uroot -hlocalhost -p123456 test ");
      OutputStream out = child.getOutputStream();//控制台的输入信息作为输出流
      String inStr;
      StringBuffer sb = new StringBuffer("");
      String outStr;
      BufferedReader br = new BufferedReader(new InputStreamReader(
              new FileInputStream(fPath), "utf8"));
      while ((inStr = br.readLine()) != null) {
          sb.append(inStr + "\r\n");
      }
      outStr = sb.toString();

      OutputStreamWriter writer = new OutputStreamWriter(out, "utf8");
      writer.write(outStr);
      // 注：这里如果用缓冲方式写入文件的话，会导致中文乱码，用flush()方法则可以避免
      writer.flush();
      // 别忘记关闭输入输出流
      out.close();
      br.close();
      writer.close();

      System.out.println("/* Load OK! */");

    } catch (Exception e) {
        e.printStackTrace();
    }

  } 
}

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