<dependency>
    <groupId>net.sourceforge.jexcelapi</groupId>
    <artifactId>jxl</artifactId>
    <version>2.6.10</version>
</dependency>

读取日志，将有用信息存入excel

java">public static void main(String[] args){
        String filePath = "C:\\tempJar\\runtime.log";
        String targetFilePath = "C:\\tempJar\\tadiao.xls";
        readTxtFile(filePath, targetFilePath, 1, 1000);
    }

    public static void readTxtFile(String filePath, String targetFilePath, Integer lineBegin, Integer lineMax){
        try {
            File fileA = new File(targetFilePath);
            String encoding="UTF-8";
            File file=new File(filePath);
            if(file.isFile() && file.exists()){ //判断文件是否存在
                InputStreamReader read = new InputStreamReader(
                        new FileInputStream(file),encoding);//考虑到编码格式
                BufferedReader bufferedReader = new BufferedReader(read);
                String lineTxt = null;
                int count = lineBegin;
                Workbook wb = Workbook.getWorkbook(fileA); // 获得原始文档
                WritableWorkbook workbookA = Workbook.createWorkbook(fileA, wb);
                WritableSheet sheetA = workbookA.getSheet(0);
                Label label = null;
                while((lineTxt = bufferedReader.readLine()) != null){
                    if(!lineTxt.contains("sendLog2Kafka info")){
                        continue;
                    }
                    if(!lineTxt.contains("cu1xfw6x4nefwvG1")){
                        continue;
                    }
                    System.out.println(lineTxt);

                    String splitStr = lineTxt.substring(188);
                    System.out.println(splitStr);
                    JSONObject jSONObject = null;
                    try {
                        jSONObject = JSONObject.parseObject(splitStr);
                    }catch(Exception e){
                        continue;
                    }

                    List<String> columnList = new ArrayList<>();
                    columnList.add("data_type");
                    columnList.add("device_key");
                    columnList.add("device_name");
                    columnList.add("device_position");
                    columnList.add("device_project");
                    columnList.add("forward_info");
                    columnList.add("org_id");
                    columnList.add("product_key");
                    columnList.add("request_id");
                    columnList.add("request_time");

                    int index = 0;
                    for(String column:columnList){
                        String dataTypeValue = (String)jSONObject.get(column);
                        label = new Label(index,count,dataTypeValue);
                        sheetA.addCell(label);
                        index ++;
                    }
                    if(count >= lineMax){
                        break;
                    }

                    count ++;
                }
                workbookA.write();    //写入数据
                workbookA.close();
                read.close();
            }else{
                System.out.println("找不到指定的文件");
            }
        } catch (Exception e) {
            System.out.println("读取文件内容出错");
        }
    }