前言：

        fs读取本地的txt文件。

实现效果：

 实现步骤：

安装fs模块

npm i  fs --save

utf-8 的txt文件读取

1、router.local.js

module.exports = app => {
    const { router, controller, middleware } = app;


    router.get("/getTxtXiaoshuo", controller.testApi.fsxiaoshuo.getTxtXiaoshuo);
}

2、controller/testApi/fsxiaoshuo.js

fs.readFile(地址，格式，回调函数)

fs.readFileSync('hello.txt',{flag:'r',encoding:'utf-8'})   //utf-8  格式

const Controller = require('egg').Controller;
class FsXiaoShuoController extends Controller {

    async getTxtXiaoshuo(ctx) {
      const requestPromise = new Promise((resolve, reject) => {
        //fs.readFile(地址，格式，回调函数)
        fs.readFile('D:\\1.txt',function (err,data) {
            console.log('拿到数据了：')
            if(err){
              return resolve({
                code:400,
                data:err
              })
            }else{
              return resolve({
                code:200,
                data:data
              })
            }

          })
        })

     })
    const result = await requestPromise;
    ctx.body = result

  }
}
module.exports = FsXiaoShuoController;

gb2312 格式的txt文件读取

 1、router.local.js

module.exports = app => {
    const { router, controller, middleware } = app;


    router.get("/getTxtXiaoshuo", controller.testApi.fsxiaoshuo.getTxtXiaoshuo);
}

2、安装插件（gb2312 必须有的）

npm install iconv-lite

3、controller/testApi/fsxiaoshuo.js

fs.readFile(地址，格式，回调函数)

const Controller = require('egg').Controller;
class FsXiaoShuoController extends Controller {

    async getTxtXiaoshuo(ctx) {
      const requestPromise = new Promise((resolve, reject) => {
        //fs.readFile(地址，格式，回调函数)
        fs.readFile('D:\\1.txt',function (err,data) {
            console.log('拿到数据了：')
            if(err){
              return resolve({
                code:400,
                data:err
              })
            }else{
                let content = iconv.decode(data, 'GB2312').toString();
              return resolve({
                code:200,
                content 
              })
            }

          })
        })

     })
    const result = await requestPromise;
    ctx.body = result

  }
}
module.exports = FsXiaoShuoController;