Notepad++中JSON文件Unicode转义序列解码部分字符失败求助

Hey there, let's break down exactly why your long dashes, Ç, and other characters aren't fixing, and walk through step-by-step solutions to get your JSON clean and ready for your program.

Why Some Characters Are Still Broken #

First off, what you're dealing with isn't just "Unicode escape sequences"—it's mojibake (double encoding). Here's the simple breakdown:

• Characters like é are stored as UTF-8 bytes (C3 A9), but if someone (or a tool) incorrectly decoded those bytes using ISO-8859-1 (ANSI), you get é.
• A long dash (—) has UTF-8 bytes E2 80 94; decoding that as ANSI gives —.
• Ç becomes Ç for the same reason: UTF-8 bytes C3 87 → ANSI-decoded to Ç.

Your earlier steps (Decode JS → ANSI → UTF-8) fixed some cases, but missed others because:

1. The "Decode JS" feature targets \uXXXX style escapes, not this byte-level encoding mess.
2. Some characters might have gone through multiple rounds of accidental encoding, making the single ANSI→UTF-8 flip insufficient.

Step-by-Step Fixes for Notepad++ #

Fix 1: Use Built-in Encoding Conversions (No Plugins Needed) #

This is the fastest fix for most double-encoding cases:

1. Open your messed-up JSON file in Notepad++.
2. Go to the top menu: Encoding → Convert to ANSI. This takes the current "garbage" characters and saves them as the original UTF-8 bytes (since ANSI maps 1:1 to single-byte values).
3. Immediately go back to Encoding → Convert to UTF-8. Now Notepad++ will decode those bytes correctly using UTF-8, and your é, —, and Ç should pop into place.
   • If this doesn't work on the first try, close the file without saving, reopen it with Encoding → ANSI selected in the open dialog, then repeat steps 2-3.

Fix 2: Use Python Script for Stubborn Cases #

If some characters still refuse to cooperate (maybe they were encoded three times?), use Notepad++'s Python Script plugin to automate the fix:

1. Install the Python Script plugin via Plugins → Plugins Admin, search for it, and install.
2. Go to Plugins → Python Script → New Script, name it FixMojibake.py, and paste this code:

# Get the entire file content
raw_text = editor.getText()
# Reverse the double encoding: treat text as ISO-8859-1 bytes, decode to UTF-8
fixed_text = raw_text.encode('iso-8859-1').decode('utf-8')
# Replace the file content with the fixed version
editor.setText(fixed_text)

3. Run the script via Plugins → Python Script → Scripts → FixMojibake. This will fix every case of UTF-8→ANSI mojibake in one go.

Fix 3: Target Specific Characters (Quick Manual Patch) #

If you only have a few stubborn characters left, you can do a direct find-and-replace:

1. Open the Replace dialog (Ctrl+H).
2. In the "Find what" field, paste the messed-up character (e.g., — or Ç).
3. In the "Replace with" field, paste the correct character (e.g., — or Ç).
4. Click "Replace All" to clean up those last stragglers.

Final Check #

After fixing, save the file as UTF-8 (Encoding → UTF-8) and verify that your program reads it correctly. This should eliminate all the encoding-related garbage from your JSON.

内容的提问来源于stack exchange，提问作者Don