How to resolve gibberish characters in JMeter response data?

The issue of garbled response data in JMeter may be caused by several possible reasons:

1. The response data is garbled: First, verify if the response data is indeed garbled by checking the encoding type. If it is confirmed to be garbled, try modifying JMeter’s default character encoding settings. Find the jmeter.bat file (Windows) or jmeter file (Linux) in the bin directory of JMeter, open the file, and locate the following line:

set JVM_ARGS="-Dfile.encoding=UTF-8"

Change the character encoding of your response data to a suitable encoding type (such as GBK, UTF-16, etc.) and then save the file and restart JMeter.

1. JMeter is not parsing the response data correctly: JMeter defaults to using UTF-8 encoding to parse response data, but if the encoding of the response data is different from JMeter’s default encoding, it may result in garbled text. You can set the encoding type of the response data in the HTTP request by going to the “Advanced” tab and selecting the correct encoding type for “Response Encoding”.
2. If the server does not properly set the encoding type of response data, then no matter how JMeter’s encoding type is set, the problem of garbled characters cannot be resolved. One option is to try adding the “Accept-Charset” header in the HTTP request, setting the correct encoding type, and ensuring that the server returns properly encoded response data.

If the above methods still cannot solve the garbled code issue, further investigation into server configuration, response data encoding issues, etc. may be necessary.