为什么用Android Volley时返回的中文是乱码，而postman却显示正常

StringRequest.java

protected Response<String> parseNetworkResponse(NetworkResponse response) {
String parsed;
try {
parsed = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
Log.e("-----JSON----", parsed);
if(this.needCache && !parsed.equals(DataCache.getDataCache().queryCache(this.url))) {
DataCache.getDataCache().saveToCache(this.url, parsed);
}
} catch (UnsupportedEncodingException var4) {
parsed = new String(response.data);
}

return Response.success(parsed, HttpHeaderParser.parseCacheHeaders(response));
}

HttpHeaderParser.java

public static String parseCharset(Map<String, String> headers) {
String contentType = (String)headers.get("Content-Type");
if(contentType != null) {
String[] params = contentType.split(";");

for(int i = 1; i < params.length; ++i) {
String[] pair = params[i].trim().split("=");
if(pair.length == 2 && pair[0].equals("charset")) {
return pair[1];
}
}
}

return "ISO-8859-1";
}