Node.js使用Express框架遇到中文乱码问题的解决方案

const express = require('express');
const app = express();

// 对于POST请求，解析application/json和application/x-www-form-urlencoded
app.use(express.json({ limit: '50mb', type: 'application/json' }));
app.use(express.urlencoded({ limit: '50mb', extended: true, parameterLimit: 5000 }));

// 设置响应头，确保内容类型和字符编码正确
app.use((req, res, next) => {
    res.setHeader('Content-Type', 'text/html; charset=utf-8');
    next();
});

app.get('/some-route', (req, res) => {
    res.json({ message: '你好，世界！' }); // JSON响应自动处理UTF-8编码
});

fetch('/some-route', {
    method: 'POST',
    headers: {
        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
    },
    body: 'param1=你好&param2=世界'
});

const cors = require('cors');
app.use(cors({
    optionSuccessStatus: 200, // 某些客户端要求状态码204，这里设置为200以满足这些客户端需求
    credentials: true,        // 允许发送Cookie等凭证信息
}));

const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/mydatabase', { useNewUrlParser: true, useUnifiedTopology: true });
mongoose.set('useCreateIndex', true); // 使用createIndex代替ensureIndex以避免弃用警告
mongoose.connection.on('connected', () => {
    console.log('Mongoose connected to mongodb');
});