这是什么问题

当我尝试从我的 StringBuilder 获取字符串时遇到问题

BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()), 128 * 1024);
StringBuilder dataResponseSB = new StringBuilder();
String line ;
while ((line = reader.readLine()) != null) {
    dataResponseSB.append(line);
    if (DataFactory.DEBUG_MODE) {
        // all data here are complete
        Log.i("===LoadDataActivity","line: "+line);
    }
}
String rawdata = new String(dataResponseSB); // dataResponseSB.toString(); also not work
if (DataFactory.DEBUG_MODE) {
    // data here are lost
    Log.i("===LoadDataActivity","rawdata: "+rawdata);
}

(-) 我从 BufferedReader .readLine() 收到大量数据

(-) 我使用 Log 检查并确保我得到了大约 5 行每行 8000 缓冲区大小并且我非常确定我已正确接收所有数据

(1) 我在此处将每一行附加到 StringBuilder

(-) 在我将所有行附加到 StringBuilder 之后

(2) 我尝试将其转换回字符串

(-) 现在，问题是，当我在这里检查新字符串时，数据只有 8192(它应该至少包含 30,000 或更多)

问题是什么？我不确定它在附加到 StringBuilder(1) 时丢失了，还是在转换回 String (2) 时丢失了

我在下面添加了我尝试过的代码，我已经尝试过 UTF8 和不使用 UTF8

            HttpParams params = new BasicHttpParams();
            HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
            //params.setParameter(CoreProtocolPNames.PROTOCOL_VERSION, );
            params.setParameter(CoreConnectionPNames.SOCKET_BUFFER_SIZE, 128 * 1024);
            HttpClient client = new DefaultHttpClient(params);


        //  HttpClient client = new DefaultHttpClient(new BasicHttpParams());
            HttpPost httppost = new HttpPost(DataFactory.REQUEST_API_URL + "?id=" + DataFactory.USER_ID );
            // Depends on your web service

            HttpConnectionParams.setConnectionTimeout(client.getParams(), 10000); //Timeout Limit
            HttpConnectionParams.setSocketBufferSize(client.getParams(), 128 * 1024);
            HttpResponse response = client.execute(httppost);  
            //response.setParams(client.getParams().setParameter(CoreConnectionPNames.SOCKET_BUFFER_SIZE, 128 * 1024));

            //String rawdata = IOUtils.toString(response.getEntity().getContent(), "UTF-8");
           // String rawdata = EntityUtils.toString(response.getEntity());
            String rawdata = getResponseBody(response.getEntity());

            //Scanner s = new Scanner(response.getEntity().getContent()).useDelimiter("\\A");
            //String rawdata = s.hasNext() ? s.next() : "";


            /*

            //BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
            // ===================

            BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()), 128 * 1024);
            StringBuilder dataResponseSB = new StringBuilder();
            String line ;
            while ((line = reader.readLine()) != null) {
                dataResponseSB.append(line);
                if (DataFactory.DEBUG_MODE) {
                    Log.i("===LoadDataActivity","line: "+line);
                }
            }
            dataResponseSB.trimToSize();
            String rawdata = new String(dataResponseSB);

            /*
            InputStreamReader reader = new InputStreamReader(response.getEntity().getContent());
            StringBuffer sb = new StringBuffer();
            int c;
            while ((c = reader.read()) != -1) {
                sb.append((char)c);
                if (DataFactory.DEBUG_MODE) {
                    //Log.i("===LoadDataActivity","line: "+line);
                }
            }
            */

最佳答案

我很确定这是问题所在:

Log.i("===LoadDataActivity","rawdata: "+rawdata);

您假设日志条目可以包含您的所有数据 - 我相信每个日志条目限制为 8192 个字符。

我建议您记录 rawdata.length()，您会发现它实际上已经获得了所有数据 - 它只是记录了失败的数据。

关于java - StringBuilder 在转换为 String 时丢失数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23842357/