读取文件的内容并使用 javascript 将其打印到控制台
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Read contents of a file and print it to console using javascript
提问by Omiye Jay Jay
I am new to javascript and I would like to specify a javascript program to read from a file and print the contents of the file to a console?.This is the code I have written below and am getting an error,please what's wrong with it?
我是 javascript 新手，我想指定一个 javascript 程序来读取文件并将文件的内容打印到控制台？。这是我在下面编写的代码，但出现错误，请问有什么问题?
var express = require('express');
var app = express.createServer(express.logger());
app.get('/',function(request,response){
var fs = require('fs');
var buffer = new Buffer(fs.readFileSync('index.html','utf8'));
response.send(Buffer.toString());
});
var port = process.env.PORT || 5000;
app.listen(port,function()
{
fs.readFileSync();
console.log("Listening on"+ port);
}
);
回答by Paul Sweatte
Use the readFilemethod of the fsobject to read the file, then use console.logto print it:
使用对象的readFile方法fs读取文件，然后使用console.log打印：
/* File System Object */
var fs = require('fs');
/* Read File */
fs.readFile('foo.json', bar)
function bar (err, data)
{
/* If an error exists, show it, otherwise show the file */
err ? Function("error","throw error")(err) : console.log(JSON.stringify(data) );
};
For instance, if it is named loadfiles.js, run it as such:
例如，如果它是 named loadfiles.js，那么运行它：
node loadfiles.js
