Javascript node.js post方法req.body未定义，即使使用body解析器

大家好，我正在使用node js使用dialogflow聊天机器人

我正在尝试从http请求post方法获取参数

我使用了postman，是的，我在标题中将内容类型设置为json，我的请求正文有以下代码：

{
"text":"hello"
}

以及以下链接 http://localhost:5000/api/df_text_query

我有以下index.js文件：

const express = require('express');
const bodyParser = require('body-parser');


const app = express();

require('./routes/dialogFlowRoutes')(app);


app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }))

app.get('/',(req , res)=>{

res.send({'hello':'Johnny'});

});


const PORT = process.env.port || 5000;

app.listen(PORT);

const dialogflow = require('dialogflow');
 const config = require('../config/keys');
 const sessionClient = new dialogflow.SessionsClient();
 const sessionPath = sessionClient.sessionPath(config.googleProjectID, config.dialogFlowSessionID);
    module.exports = app => {
    app.get('/', (req, res) => {
        res.send({ 'hello': 'world!' })
        
    });
    app.post('/api/df_text_query', async (req, res) => {
        console.log(req.body)
        const request = {
            session: sessionPath,
            queryInput: {
                text: {
                    text: req.body.text,
                    languageCode: config.dialogFlowSessionLanguageCode
                }
            }
        };

    let responses = await sessionClient
        .detectIntent(request);

    res.send(responses[0].queryResult)
    });

app.post('/api/df_event_query', (req, res) => {
    res.send({ 'do': 'event query' })
});
}

这是my dialogflowRoutes.js文件：

const express = require('express');
const bodyParser = require('body-parser');


const app = express();

require('./routes/dialogFlowRoutes')(app);


app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }))

app.get('/',(req , res)=>{

res.send({'hello':'Johnny'});

});


const PORT = process.env.port || 5000;

app.listen(PORT);

const dialogflow = require('dialogflow');
 const config = require('../config/keys');
 const sessionClient = new dialogflow.SessionsClient();
 const sessionPath = sessionClient.sessionPath(config.googleProjectID, config.dialogFlowSessionID);
    module.exports = app => {
    app.get('/', (req, res) => {
        res.send({ 'hello': 'world!' })
        
    });
    app.post('/api/df_text_query', async (req, res) => {
        console.log(req.body)
        const request = {
            session: sessionPath,
            queryInput: {
                text: {
                    text: req.body.text,
                    languageCode: config.dialogFlowSessionLanguageCode
                }
            }
        };

    let responses = await sessionClient
        .detectIntent(request);

    res.send(responses[0].queryResult)
    });

app.post('/api/df_event_query', (req, res) => {
    res.send({ 'do': 'event query' })
});
}

这是我发送以下请求时遇到的错误

dialogFlowRoutes.js:17
                    text: req.body.text,
                                   ^

TypeError: Cannot read property 'text' of undefined

---

初始化中间件的顺序很重要

在对主体执行操作之前，必须对其进行分析。初始化bodyParser后移动路由中间件，如下所示：

app.use（bodyParser.json（））；
use（bodyParser.urlencoded（{extended:true}））
要求（“./路线/对话框流程”）（应用程序）；