node.js 如何在express js中获取json文件并在view中显示
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How to get a json file in express js and display in view
提问by PCA
I have a problem in getting a .jsonfile in express and displaying in a view. Kindly share your examples.
我.json在快速获取文件并在视图中显示时遇到问题。请分享你的例子。
回答by Brankodd
var fs = require("fs"),
json;
function readJsonFileSync(filepath, encoding){
if (typeof (encoding) == 'undefined'){
encoding = 'utf8';
}
var file = fs.readFileSync(filepath, encoding);
return JSON.parse(file);
}
function getConfig(file){
var filepath = __dirname + '/' + file;
return readJsonFileSync(filepath);
}
//assume that config.json is in application root
json = getConfig('config.json');
回答by CENT1PEDE
Do something like this in your controller.
在你的控制器中做这样的事情。
To getthe jsonfile's content :
为了获得该JSON文件的内容：
ES5var foo = require('./path/to/your/file.json');
ES5var foo = require('./path/to/your/file.json');
ES6import foo from './path/to/your/file.json';
ES6import foo from './path/to/your/file.json';
To sendthe jsonto your view:
要发送的JSON到您的视图：
function getJson(req, res, next){
res.send(foo);
}
This should send the jsoncontent to your view via a request.
这应该通过请求将json内容发送到您的视图。
NOTE
笔记
According to BTMPL
根据BTMPL
While this will work, do take note that require calls are cached and will return the same object on each subsequent call. Any change you make to the .json file when the server is running will not be reflected in subsequent responses from the server.
虽然这会起作用，但请注意 require 调用会被缓存，并且会在每次后续调用中返回相同的对象。您在服务器运行时对 .json 文件所做的任何更改都不会反映在服务器的后续响应中。
回答by Arbie Samong
This one worked for me. Using fs module:
这个对我有用。使用 fs 模块：
var fs = require('fs');
function readJSONFile(filename, callback) {
fs.readFile(filename, function (err, data) {
if(err) {
callback(err);
return;
}
try {
callback(null, JSON.parse(data));
} catch(exception) {
callback(exception);
}
});
}
Usage:
用法：
readJSONFile('../../data.json', function (err, json) {
if(err) { throw err; }
console.log(json);
});
