java 使用 JSONTokener 将字符串解析为 JSONObject 或 JSONArray
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Parsing String with JSONTokener to JSONObject OR JSONArray
提问by Tobias
I'm using the following code to handle REST responses from my server:
我正在使用以下代码来处理来自我的服务器的 REST 响应：
if (response.getEntity() != null) {
BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8"));
StringBuilder builder = new StringBuilder();
for (String line = null; (line = reader.readLine()) != null;) {
builder.append(line).append("\n");
}
JSONTokener tokener = new JSONTokener(builder.toString());
try {
rr.jsonObject = new JSONObject(tokener);
} catch (JSONException e) {
e.printStackTrace();
Log.d("parsing", "creating json array");
try {
rr.jsonArray = new JSONArray(tokener);
} catch (JSONException e1) {
e1.printStackTrace();
}
}
}
If the response is an JSONObject, it works perfectly but if the server returns a JSONArray, the second try block also throws although it's correct json.
如果响应是一个 JSONObject，它可以完美运行，但如果服务器返回一个 JSONArray，第二个 try 块也会抛出，尽管它是正确的 json。
03-30 14:09:15.069: W/System.err(6713): org.json.JSONException: End of input at character 314 of [{"__className":"stdClass","char3code":"DEU","fips_name":"Germany","alternate_names":"Germany, Deutschland, Allemagne, Alemania"},{"__className":"stdClass","char3code":"USA","fips_name":"United States","alternate_names":"United States of America, Vereinigte Staaten von Amerika, \u00c9tats-Unis, Estados Unidos"}]
回答by Stephen C
I expect the reason that this is failing is that when you call new JSONArray(tokener)the tokeneris no longer positioned at the start of the token stream. Try creating a new JSONTokenerinstance for the 2nd attempt at parsing..
我期望，这是失败的原因是，当你调用new JSONArray(tokener)的tokener不再位于令牌流的开始。尝试JSONTokener为第二次解析尝试创建一个新实例..
