situationExpress/routes/index.js

var express = require("express");
var router = express.Router();
var fs = require("fs");

/* GET home page. */
// router.get('/', function(req, res, next) {
//   res.render('index', { title: 'Express' });
// });
router.get("/", function (req, res, next) {
  function readFileList(path, filesList) {
    var files = fs.readdirSync(path);
    files.forEach(function (itm, index) {
      var stat = fs.statSync(path + itm);
      if (stat.isDirectory()) {
        //递归读取文件
        readFileList(path + itm + "/", filesList);
      } else {
        if (itm.endsWith('.json')) {
          var obj = {}; // 定义一个对象存放文件的路径和名字
          obj.path = path; // 路径
          obj.filename = itm; // 名字
          filesList.push(obj);
        }
      }
    });
  }
  var getFiles = {
    getFileList: function (path) {
      var filesList = [];
      readFileList(path, filesList);
      return filesList;
    },
    getFile: function (path) {
      var fileList = [];
      this.getFileList(path).forEach((item) => {
        fileList.push(item.filename);
      });
      res.send(fileList);
      return fileList;
    },
  };
  getFiles.getFile("D:/situationData/");
});

router.post("/fileContent", function (req, res, next) {
  console.log("111", req.body.fileName);
  const name = req.body.fileName;
  var file = `D:/situationData/${name}`; //也可以用这种方式指定路径
  //读取json文件
  fs.readFile(file, "utf-8", (err, data) => {
    if (err) {
      return res.send({
        code: 500,
        data: null,
        msg: "文件读取失败",
      });
    } else {
      const jsonData = JSON.parse(data);
      // res.json(jsonData);
      return res.send({
        code: 200,
        data: jsonData,
        msg: "成功",
      });
    }
  });
  // return data
});
router.get("/readTxt", function (req, res) {
  fs.readFile(`D:/situationData/example.txt`, "utf-8", (err, data) => {
    if (err) {
      return res.send({
        code: 500,
        data: null,
        msg: "文件读取txt失败",
      });
    } else {
      // const jsonData = JSON.parse(data);
      const fileContent = data;
      // res.json(jsonData);
      return res.send({
        code: 200,
        data: fileContent,
        msg: "成功",
      });
    }
  });
});
module.exports = router;