对于Python不熟悉的同学，建议从本专栏第一篇开始观看
https://blog.csdn.net/qq_20330595/category_12844705.html

先上效果图

代码

import threading
import tkinter as tk
import json
from tkinter import scrolledtext
import tkinter.filedialog as filedialog

class JsonParserGUI:
    def __init__(self):
        self.root = tk.Tk()
        self.root.title("字符串转JSON")
        self.text_area = scrolledtext.ScrolledText(self.root, width=80, height=20)
        self.text_area.pack(fill=tk.BOTH, expand=1)
        # self.text_area = tk.Text(self.root)
        # self.text_area.pack(fill=tk.BOTH, expand=1)
        self.button_frame = tk.Frame(self.root)
        self.button_frame.pack(fill=tk.X)
        self.parse_button = tk.Button(self.button_frame, text="Parse JSON", command=self.parse_json)
        self.parse_button.pack(side=tk.LEFT)
        self.open_button = tk.Button(self.button_frame, text="Open File", command=self.open_file_thread)
        self.open_button.pack(side=tk.LEFT)

    def parse_json(self):
        try:
            json_data = json.loads(self.text_area.get(1.0, tk.END))
            self.text_area.delete(1.0, tk.END)
            self.text_area.insert(tk.END, json.dumps(json_data, indent=4))
        except json.JSONDecodeError as e:
            self.text_area.delete(1.0, tk.END)
            self.text_area.insert(tk.END, f"Error: {e}")
            
    def open_file_thread(self):
        thread = threading.Thread(target=self.open_file)
        thread.start()
        
    def open_file(self):
        file_path = tk.filedialog.askopenfilename()
        if file_path:
            with open(file_path, 'r') as file:
                file_content = file.read()
                self.update_text_area_thread(file_content)
                
    def update_text_area_thread(self, file_content):
        thread = threading.Thread(target=self.update_text_area, args=(file_content,))
        thread.start()
                        
    def update_text_area(self, json_data):
        self.text_area.delete(1.0, tk.END)
        self.text_area.insert(tk.END, json_data)

    def run(self):
        self.root.mainloop()


if __name__ == "__main__":
    gui = JsonParserGUI()
    gui.run()
    
    
def save_string_to_file(string, filename):
    with open(filename, 'w') as file:
        file.write(string)