app.get('/userinfo',function(req, res, next){ var connection = mysql.createConnection({ host: 'localhost', user: 'root', password: 'hello', database: 'test', connectionLimit: 10 }); connection.connect(); var obj; connection.query("select * from user_info",function(err, rows, fields){ obj = JSON.parse(rows); }); res.send(typeof obj);// 这里的obj是undefined 不科学啊! 臣妾想不明白啊!});
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