public class Xqj {
    private String ip;
    private String port;
    private String user;
    private String pass;

    public Xqj(String ip, String port, String user, String pass){
        this.ip = ip;
        this.port = port;
        this.user = user;
        this.pass = pass;
    }

    private XQExpression startBd(){
        XQDataSource xqs;
        XQConnection conn;
        XQExpression xqe = null;
        try {
            xqs = new net.xqj.exist.ExistXQDataSource();
            xqs.setProperty("serverName", ip);
            xqs.setProperty("port", port);
            xqs.setProperty("user", user);
            xqs.setProperty("password", pass);
            conn = xqs.getConnection();
            xqe = conn.createExpression();
        } catch (XQException e) {
            e.printStackTrace();
        }
        return xqe;
    }

    public String doQuery(String query){
      StringBuilder res = null;
      XQExpression xq = startBd();
        try{
            XQResultSequence xr = xq.executeQuery(query);
            res = new StringBuilder();
            while (xr.next()){
                res.append(xr.getItemAsString(null)+"\n");
            }
        } catch (XQException e){e.printStackTrace();}
        finally {
            try {xq.close();}
            catch (XQException e){e.printStackTrace();}
        }
      return  res.toString();
    }
  }