springboot增量备份数据库全部代码

以下是使用Spring Boot实现MySQL增量备份的示例代码：

@Component
public class IncrementalBackupTask {
    
    @Value("${database.backup.path}")
    private String backupPath;
    
    @Autowired
    private DataSource dataSource;
    
    private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
    
    @Scheduled(cron = "${database.backup.cron}")
    public void backupDatabase() {
        try {
            File backupFolder = new File(backupPath);
            if (!backupFolder.exists() || !backupFolder.isDirectory()) {
                backupFolder.mkdirs();
            }
            
            String backupFileName = "incremental-backup-" + DATE_FORMAT.format(new Date()) + ".sql";
            File backupFile = new File(backupFolder, backupFileName);
            
            String lastBackupFileName = getLastBackupFileName();
            if (lastBackupFileName == null) {
                fullBackup(backupFile);
            } else {
                incrementalBackup(lastBackupFileName, backupFile);
            }
            
            jdbcTemplate.update("INSERT INTO backup_history (file_name, backup_time) VALUES (?, ?)", backupFileName, new Date());
            
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    private void fullBackup(File backupFile) throws Exception {
        ProcessBuilder processBuilder = new ProcessBuilder(
                "mysqldump",
                "--skip-comments",
                "--skip-triggers",
                "-u" + getUserName(),
                "-p" + getPassword(),
                "--databases",
                getDatabaseName(),
                "--result-file=" + backupFile.getAbsolutePath());
        
        processBuilder.environment().put("MYSQL_PWD", getPassword());
        
        Process process = processBuilder.start();
        
        int exitCode = process.waitFor();
        
        if (exitCode != 0) {
            throw new RuntimeException("Failed to backup database");
        }
    }
    
    private void incrementalBackup(String lastBackupFileName, File backupFile) throws Exception {
        String binLogFileName = getBinLogFileName(lastBackupFileName);
        
        ProcessBuilder processBuilder = new ProcessBuilder(
                "mysqlbinlog",
                "--start-position=4",
                "--base64-output=DECODE-ROWS",
                "-u" + getUserName(),
                "-p" + getPassword(),
                getBinLogFile(lastBackupFileName),
                "|",
                "mysql",
                "-u" + getUserName(),
                "-p" + getPassword(),
                "--database=" + getDatabaseName());
        
        processBuilder.environment().put("MYSQL_PWD", getPassword());
        
        Process process = processBuilder.start();
        
        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        
        String line;
        while ((line = reader.readLine()) != null) {
            Files.write(backupFile.toPath(), (line + "\n").getBytes(), StandardOpenOption.CREATE, StandardOpenOption.APPEND);
        }
        
        int exitCode = process.waitFor();
        
        if (exitCode != 0) {
            throw new RuntimeException("Failed to backup database incrementally");
        }
    }
    
    private String getLastBackupFileName() {
        String sql = "SELECT file_name FROM backup_history ORDER BY backup_time DESC LIMIT 1";
        List<String> fileNames = jdbcTemplate.queryForList(sql, String.class);
        return fileNames.isEmpty() ? null : fileNames.get(0);
    }
    
    private String getBinLogFileName(String lastBackupFileName) throws Exception {
        String sql = "SHOW MASTER STATUS";
        List<Map<String, Object>> rows = jdbcTemplate.queryForList(sql);
        if (!rows.isEmpty()) {
            Map<String, Object> row = rows.get(0);
            String binLogFileName = (String) row.get("File");
            if (binLogFileName != null) {
                String position = (String) row.get("Position");
                if (position != null) {
                    return binLogFileName;
                }
            }
        }
        throw new RuntimeException("Failed to get bin log file name");
    }
    
    private String getBinLogFile(String lastBackupFileName) {
        return backupPath + "/mysql-bin." + getBinLogNumber(lastBackupFileName);
    }
    
    private int getBinLogNumber(String lastBackupFileName) {
        String[] parts = lastBackupFileName.split("\\.");
        return Integer.parseInt(parts[2]);
    }
    
    private String getUserName() {
        return dataSource.getUsername();
    }
    
    private String getPassword() {
        return dataSource.getPassword();
    }
    
    private String getDatabaseName() {
        return dataSource.getConnection().getCatalog();
    }
}

在上面的代码中，我们使用了Spring Boot的定时任务注解`@Scheduled`来定期执行备份任务。在备份任务中，我们首先检查上一个备份文件是否存在，如果不存在，则执行完整备份。否则，我们通过解析上一个备份文件的名称来获取上一个备份文件的binlog文件名称和位置。然后，我们使用`mysqlbinlog`命令来获取从上一个备份文件后发生的所有更改，并将它们追加到新的备份文件中。最后，我们使用JdbcTemplate将备份历史记录保存在数据库中。请注意，这里我们使用了MySQL，如果您使用其他数据库，需要相应地更改备份命令。