opencsv

问题 I've been pondering this for a fair amount of time now. I'm trying to download the data from Yahoo!'s Stock API. When you use the API, it gives you a .csv file. I've been looking at opencsv, which seems perfect, except I want to avoid downloading and saving the file, if at all possible . OpenCSV, according to the examples, can only read from a FileReader . According to Oracle's docs on FileReader, the file needs to be local. Is it possible to read from a remote file using OpenCSV without

问题 I have Accelerometer and Gyro sensor streaming data which is saved in Download folder. I want to read all the data or line by line as the data stream in real time,but i am not able to go beyond first line. try { CSVReader reader = newCSVReader(newFileReader(path.getAbsoluteFile())); { List<String[]>allRows = reader.readAll(); for (String[]row :allRows) Log.i(TAG1,Arrays.toString(row)); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }

问题 We are using OpenCSV. The csv is as id,fname,lname,address.line1,address.line2 The beans are Person{ String id; String lname; String fname; Address address; } Address{ String line1; String line2; } Is it possible to fill the nested Address object with opencsv ! The opencsv.bean and opencsv.bean.customconverter have some classes which seems can do what I want but I could not find any samples. I have seen the Parse CSV to multiple/nested bean types with OpenCSV? but the answer focus on SuperCSV

问题 I am trying to create a table using the OpenCSVSerde and some integer and date columns. But the columns get converted to String. Is this an expected outcome? As a workaround, I do an explicit type-cast after this step (which makes the complete run slower) hive> create external table if not exists response(response_id int,lead_id int,creat_date date ) ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.OpenCSVSerde' WITH SERDEPROPERTIES ('quoteChar' = '"', 'separatorChar' = '\,', 'serialization

问题 I am trying to parse a CSV file using OpenCSV. One of the columns stores the data in YAML serialized format and is quoted because it can have comma inside it. It also has quotes inside it, so it is escaped by putting two quotes. I am able to parse this file easily in Ruby, but with OpenCSV I am not able to parse it fully. It is a UTF-8 encoded file. Here is my Java snippet which is trying to read the file CSVReader reader = new CSVReader(new InputStreamReader(new FileInputStream(csvFilePath),

问题 I am trying to parse a CSV file using OpenCSV. One of the columns stores the data in YAML serialized format and is quoted because it can have comma inside it. It also has quotes inside it, so it is escaped by putting two quotes. I am able to parse this file easily in Ruby, but with OpenCSV I am not able to parse it fully. It is a UTF-8 encoded file. Here is my Java snippet which is trying to read the file CSVReader reader = new CSVReader(new InputStreamReader(new FileInputStream(csvFilePath),

问题 When I use this function to write to a csv file all the data is embedded in double quotes. Is there a way to write to csv file without the double quotes? CSVWriter writer = new CSVWriter(new FileWriter(table+".csv"), '\t'); writer.writeAll(rset, true); writer.close(); the file contains data in the form "EMPNO" "ENAME" "JOB" "MGR" "HIREDATE" "SAL" "COMM" "DEPTNO" "TAG" "LOOKUP" "7369" "SMITH" "CLERK" "7902" "17-Dec-1980" "800" "2" "20" "E" "1" "7499" "ALLEN" "SALESMAN" "7698" "20-Feb-1981"

问题 When I use this function to write to a csv file all the data is embedded in double quotes. Is there a way to write to csv file without the double quotes? CSVWriter writer = new CSVWriter(new FileWriter(table+".csv"), '\t'); writer.writeAll(rset, true); writer.close(); the file contains data in the form "EMPNO" "ENAME" "JOB" "MGR" "HIREDATE" "SAL" "COMM" "DEPTNO" "TAG" "LOOKUP" "7369" "SMITH" "CLERK" "7902" "17-Dec-1980" "800" "2" "20" "E" "1" "7499" "ALLEN" "SALESMAN" "7698" "20-Feb-1981"

问题 I'm using opencsv 3.6 in order to create a csv file starting from a java bean. First of all, I tried this code: import com.opencsv.CSVReader; import com.opencsv.CSVWriter; import com.opencsv.bean.BeanToCsv; import com.opencsv.bean.HeaderColumnNameTranslateMappingStrategy; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.util.ArrayList; import java.util.HashMap; import java.util.Map; public class CustomBean { private String name; private String

问题 I'm using opencsv 3.6 in order to create a csv file starting from a java bean. First of all, I tried this code: import com.opencsv.CSVReader; import com.opencsv.CSVWriter; import com.opencsv.bean.BeanToCsv; import com.opencsv.bean.HeaderColumnNameTranslateMappingStrategy; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.util.ArrayList; import java.util.HashMap; import java.util.Map; public class CustomBean { private String name; private String