Mysql慢查询日志文件转Excel的方法

@Data
public class SlowQuery {
    private double queryTime;
    private double lockTime;
    private String sqlQuery;
    private String tableName;
    private Date executionDate;
}

public class MySQLSlowQueryLogParser {
    //  正则表达式匹配 慢日志内容格式抓取
    private static final Pattern QUERY_TIME_PATTERN = Pattern.compile("# Query_time: (\\d+\\.\\d+)");
    private static final Pattern LOCK_TIME_PATTERN = Pattern.compile("  Lock_time: (\\d+\\.\\d+)");
    private static final Pattern TIMESTAMP_PATTERN = Pattern.compile("SET timestamp=(\\d+);");
    public static void main(String[] args) {
        MySQLSlowQueryLogParser parser = new MySQLSlowQueryLogParser();
        //  慢查询日志存放路径
        String filePath = "D:\\日常\\2.OA\\OASERVERLANDB-slow.log";
        //  导出Excel路径
        String excelPath = "D:\\日常\\2.OA\\slow_queries.xlsx";
        //  读取慢查询日志
        List<SlowQuery> slowQueries = parser.readSlowQueryLog(filePath);
        //  写入本地Excel中
        parser.writeQueriesToExcel(slowQueries, excelPath);
    }
    /**
     * 读取慢查询日志 返回List对象
     * @param filePath 慢查询日志文件路径
     * @return List<SlowQuery> 解析结果
     * */
    public List<SlowQuery> readSlowQueryLog(String filePath) {
        List<SlowQuery> slowQueries = new ArrayList<>();
        //  转流
        try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
            String line;
            StringBuilder queryBuilder = new StringBuilder();
            //  设定默认值
            double queryTime = 0;
            double lockTime = 0;
            boolean isSlowQuery = false;
            long timestamp = 0; // 用于存储时间戳
            while ((line = br.readLine()) != null) {
                if (line.startsWith("# Query_time")) {
                    // 如果前一个查询存在，添加到列表
                    if (isSlowQuery) {
                        addSlowQuery(slowQueries, queryTime, lockTime, queryBuilder.toString().trim(), timestamp);
                    }
                    // 解析查询时间和锁定时间
                    Matcher queryTimeMatcher = QUERY_TIME_PATTERN.matcher(line);
                    if (queryTimeMatcher.find()) {
                        queryTime = Double.parseDouble(queryTimeMatcher.group(1));
                    }
                    Matcher lockTimeMatcher = LOCK_TIME_PATTERN.matcher(line);
                    if (lockTimeMatcher.find()) {
                        lockTime = Double.parseDouble(lockTimeMatcher.group(1));
                    }
                    // 开始新的慢查询
                    isSlowQuery = true;
                    // 清空缓存
                    queryBuilder.setLength(0);
                } else if (line.startsWith("SET timestamp")) {
                    // 提取时间戳
                    Matcher timestampMatcher = TIMESTAMP_PATTERN.matcher(line);
                    if (timestampMatcher.find()) {
                        timestamp = Long.parseLong(timestampMatcher.group(1)); // 获取时间戳
                    }
                } else if (line.startsWith("#") || line.trim().isEmpty()) {
                    // 忽略注释行和空行
                    continue;
                } else {
                    // 记录当前慢查询的内容
                    if (isSlowQuery) {
                        queryBuilder.append(line).append("\n");
                    }
                }
            }
            // 处理最后一个慢查询
            if (queryBuilder.length() > 0) {
                addSlowQuery(slowQueries, queryTime, lockTime, queryBuilder.toString().trim(), timestamp);
            }
        } catch (IOException e) {
            System.out.printf(e.toString());
        }
        return slowQueries;
    }
    /**
     * 添加慢查询对象
     * @param slowQueries List<SlowQuery> 慢查询对象集合
     * @param queryTime 查询时间
     * @param lockTime 锁定时间
     * @param sqlQuery Sql执行时间
     * @param timestamp 时间戳
     * */
    private void addSlowQuery(List<SlowQuery> slowQueries, double queryTime, double lockTime, String sqlQuery, long timestamp) {
        SlowQuery slowQuery = new SlowQuery();
        slowQuery.setQueryTime(queryTime);
        slowQuery.setLockTime(lockTime);
        slowQuery.setSqlQuery(sqlQuery);
        // 提取表名
        slowQuery.setTableName(extractTableName(sqlQuery));
        // 设置执行日期
        slowQuery.setExecutionDate(new Date(timestamp * 1000));
        slowQueries.add(slowQuery);
    }
    /**
     * 通过Sql语句中 提取出表名
     * @param sqlQuery 执行的Sql语句
     * @return 表名
     * */
    private String extractTableName(String sqlQuery) {
        Pattern pattern = Pattern.compile("FROM\\s+([\\w.]+)", Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(sqlQuery);
        if (matcher.find()) {
            return matcher.group(1);
        }
        return "";
    }
    /**
     * 通过处理后的集合生成到指定路径
     * @param slowQueries 数据集合
     * @param filePath 导出的Excel路径
     * */
    public void writeQueriesToExcel(List<SlowQuery> slowQueries, String filePath) {
        final int MAX_CELL_LENGTH = 32767;
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); // 日期格式化
        try (Workbook workbook = new XSSFWorkbook()) {
            Sheet sheet = workbook.createSheet("Slow Queries");
            // 创建标题行
            Row headerRow = sheet.createRow(0);
            headerRow.createCell(0).setCellValue("Query Time (s)");
            headerRow.createCell(1).setCellValue("Lock Time (s)");
            headerRow.createCell(2).setCellValue("SQL Query");
            headerRow.createCell(3).setCellValue("Table Name");
            headerRow.createCell(4).setCellValue("Execution Date");
            // 填充数据行
            int rowNum = 1;
            for (SlowQuery slowQuery : slowQueries) {
                Row row = sheet.createRow(rowNum++);
                row.createCell(0).setCellValue(slowQuery.getQueryTime());
                row.createCell(1).setCellValue(slowQuery.getLockTime()); // 确保这里写入的是原始 double 值
                String sqlQuery = slowQuery.getSqlQuery();
                if (sqlQuery.length() > MAX_CELL_LENGTH) {
                    sqlQuery = sqlQuery.substring(0, MAX_CELL_LENGTH);
                }
                row.createCell(2).setCellValue(sqlQuery);
                row.createCell(3).setCellValue(slowQuery.getTableName());
                row.createCell(4).setCellValue(dateFormat.format(slowQuery.getExecutionDate()));
            }
            // 写入到文件
            try (FileOutputStream fileOut = new FileOutputStream(filePath)) {
                workbook.write(fileOut);
            }
        } catch (IOException e) {
            System.out.printf(e.toString());
        }
    }