使用csvwriter创建时出现严重问题

Question

public void getPersons() 
{
Session s  = sessionFactory.openSession();
Criteria c = s.createCriteria(Person.class);
c.add(Restrictions.isNotNull("id"));
List<Person> al = c.list();
StringWriter writer = new StringWriter();   
CSVWriter csvWriter = new CSVWriter(writer, ',', '\'');
for (Person person : al) {
System.out.println(person.getName()+"------------------"+al);    
csvWriter.writeAll(person);            // this also not work
}

method to read data and in csv .what should i use here?by using csvWriter.writeAll() want to create ',' seprated file The method writeAll(List) in the type CSVWriter is not applicable for the arguments (Person)

Answer 1

Unless Person is a list of string arrays, this won't work.

You need a source for the CSVWriter (a List or Iterable of String[]s), which you can create from your list of Persons:

List<String[]> employees = new ArrayList<String[]>();
for (Person person : al) {
    employees.add(new String[] {person.getEmployeeId(), person.getName(), person.getEtc.()})
}

However you produce it, you can pass this to writeAll:

csvWriter.writeAll(employees);

...and close the writer:

csvWriter.close();