使用node js express打开html页面

Question

我是节点js express的新手。我想在位置D：\ d3 project \ index12.htm打开一个html页面。 app.js位于D：\ d3 project \ project_part1 \ project_part1 \ app.js

app.use(express.static('D:\d3 project')); 
app.get('/', function (req, res) {
res.sendFile('D:/d3 project' + '/'+'index12.html'); 
});
var server = app.listen(3001, '0.0.0.0', function () {
console.log('Listening on port %d', server.address().port);
});

我收到此错误

TypeError: path must be absolute or specify root to res.sendFile
at ServerResponse.sendFile (D:\d3 project\project_part1\project_part1\node_modules\express\lib\response.js:403:11)
at D:\d3 project\project_part1\project_part1\app.js:10:9
at Layer.handle [as handle_request] (D:\d3 project\project_part1\project_part1\node_modules\express\lib\router\layer.js:95:5)
at next (D:\d3 project\project_part1\project_part1\node_modules\express\lib\router\route.js:131:13)
at Route.dispatch (D:\d3 project\project_part1\project_part1\node_modules\express\lib\router\route.js:112:3)
at Layer.handle [as handle_request] (D:\d3 project\project_part1\project_part1\node_modules\express\lib\router\layer.js:95:5)
at D:\d3 project\project_part1\project_part1\node_modules\express\lib\router\index.js:277:22
at Function.process_params (D:\d3 project\project_part1\project_part1\node_modules\express\lib\router\index.js:330:12)
at next (D:\d3 project\project_part1\project_part1\node_modules\express\lib\router\index.js:271:10)
at SendStream.error (D:\d3 project\project_part1\project_part1\node_modules\express\node_modules\serve-static\index.js:120:7)

我想我给的是绝对路径，而不是相对路径。

解决方案： 刚刚将代码更改为

 res.sendFile(path.join(__dirname + '/../../index12.html'));

并添加

var path = require('path');