1. 安装依赖

npm install next-auth prisma @prisma/client

2. 配置 Prisma 模型

在 prisma/schema.prisma 文件中定义 User 和 Account 模型（next-auth v5 推荐使用自定义模型）。

javascript">model User {id            String    @id @default(uuid())email         String    @uniquename          String?image         String?hashedPassword String?accounts      Account[]createdAt     DateTime  @default(now())updatedAt     DateTime  @updatedAt
}model Account {id               String  @id @default(uuid())userId           Stringprovider         StringproviderAccountId Stringuser             User    @relation(fields: [userId], references: [id], onDelete: Cascade)createdAt        DateTime @default(now())updatedAt        DateTime @updatedAt
}

运行 prisma migrate 同步数据库：

npx prisma migrate dev --name init

3. 创建 next-auth 配置

在 pages/api/auth/[...nextauth].ts 文件中添加 next-auth 配置：

javascript">import NextAuth, { AuthOptions } from "next-auth";
import CredentialsProvider from "next-auth/providers/credentials";
import { PrismaClient } from "@prisma/client";
import { compare } from "bcryptjs"; // 假设密码是加密存储的const prisma = new PrismaClient();export const authOptions: AuthOptions = {providers: [CredentialsProvider({name: "Credentials",credentials: {email: { label: "Email", type: "email" },password: { label: "Password", type: "password" },},async authorize(credentials) {if (!credentials?.email || !credentials.password) {throw new Error("Missing email or password");}// 查找用户const user = await prisma.user.findUnique({where: { email: credentials.email },});if (!user) {throw new Error("No user found");}// 验证密码const isValidPassword = await compare(credentials.password,user.hashedPassword);if (!isValidPassword) {throw new Error("Invalid credentials");}return { id: user.id, email: user.email, name: user.name };},}),],session: {strategy: "jwt",},callbacks: {async jwt({ token, user }) {if (user) {token.id = user.id;}return token;},async session({ session, token }) {if (token) {session.user.id = token.id;}return session;},},
};export default NextAuth(authOptions);`

4. 创建登录页面

示例的登录页面：

javascript">import { signIn } from "next-auth/react";
import { useState } from "react";export default function LoginPage() {const [email, setEmail] = useState("");const [password, setPassword] = useState("");const [error, setError] = useState("");const handleSubmit = async (e: React.FormEvent) => {e.preventDefault();const result = await signIn("credentials", {email,password,redirect: false,});if (result?.error) {setError(result.error);} else {// 登录成功，跳转window.location.href = "/";}};return (<form onSubmit={handleSubmit}><div><label>Email</label><inputtype="email"value={email}onChange={(e) => setEmail(e.target.value)}required/></div><div><label>Password</label><inputtype="password"value={password}onChange={(e) => setPassword(e.target.value)}required/></div>{error && <p style={{ color: "red" }}>{error}</p>}<button type="submit">Login</button></form>);
}

5. 使用会话信息

在需要使用用户会话的页面中：

javascript">import { useSession, signOut } from "next-auth/react";export default function Dashboard() {const { data: session, status } = useSession();if (status === "loading") {return <p>Loading...</p>;}if (!session) {return <p>You are not logged in</p>;}return (<div><h1>Welcome, {session.user.name}</h1><button onClick={() => signOut()}>Sign out</button></div>);
}

6. 运行应用

npm run dev

关键点说明

密码存储：建议在用户注册时使用 bcrypt 对密码进行加密存储。
Session 策略：此示例使用 JWT 策略，如果需要使用数据库会话，可以将 session.strategy 设置为 “database” 并配置 Prisma 的 Session 模型。
错误处理：authorize 方法中抛出的错误会显示在客户端，可以根据需求自定义错误提示。