读取json文件时出错。问题出在哪里？

import json

def read_json_file(file_path):
    try:
        with open(file_path, 'r', encoding='utf-8') as file:
            data = json.load(file)
            return data
    except FileNotFoundError:
        print(f"文件未找到: {file_path}")
    except json.JSONDecodeError:
        print(f"JSON解析错误: {file_path}")
    except PermissionError:
        print(f"权限错误: 无法读取文件 {file_path}")
    except Exception as e:
        print(f"其他错误: {e}")

# 示例调用
file_path = 'example.json'
data = read_json_file(file_path)
if data:
    print(data)