更改此：
StringEntity se = new StringEntity(json); se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));httppost.setEntity(se);
仅此：
httppost.setEntity(new StringEntity(json.toString(), HTTP.UTF_8));
更改此：
StringEntity se = new StringEntity(json); se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));httppost.setEntity(se);
仅此：
httppost.setEntity(new StringEntity(json.toString(), HTTP.UTF_8));
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