Nodejs Express升级到4后logger日志用不了的问题

在升级了express 4 后执行express.logger('dev')服务器报错

Error: Most middleware (like logger) is no longer bundled with Express and must be installed separately.

解决方法

1.降级express到 3
"express": "~3.0.0"

2.添加需要的模块
"morgan": "~1.0.0"

var logger = require('morgan');
app.use(logger('dev'));