如何在Go中无需验证即可从JWT token获取声明

import (
    "github.com/dgrijalva/jwt-go"
)

token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
    return []byte("your-secret-key"), nil
})

if token.Valid {
    // token有效
} else {
    // token无效
}

claims, ok := token.Claims.(jwt.MapClaims)
if ok {
    // 获取声明
    username := claims["username"].(string)
    role := claims["role"].(string)
    // ...
}

claims := jwt.MapClaims{
    "username": "john.doe",
    "role":     "admin",
    // ...
}

token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
signedToken, err := token.SignedString([]byte("your-secret-key"))
if err != nil {
    // 处理错误
}