null is entered when using prepared statement setcharacterstream h2 database - jdbc

Question

I am trying to add value into clob as give on h2 website using preparedstatement.setcharacterstream(arg,reader) null value is inserted in the database
Connection con=getConnection();
pstmnt=con.prepareStatement(sql);
int paramcounter=1;
for (Object object : param) {
if(paramcounter==1) {
int len=object.toString().length();
Reader rdr=new StringReader(object.toString());
pstmnt.setCharacterStream(1, rdr,len);;
}
else{
pstmnt.setObject(paramcounter, object);
}
paramcounter++;
}
int retvalue=pstmnt.executeUpdate();
closeConnection();

Answer 1

We don't really have enough information to clearly identify why you might be having difficulty, but the following code works for me:
package h2test;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.sql.*;
public class H2testMain {
public static void main(String[] args) {
Connection con = null;
try {
// create an in-memory database ("...mem:...")
con = DriverManager.getConnection("jdbc:h2:mem:");
Statement s = null;
try {
s = con.createStatement();
s.execute("CREATE TABLE Table1 (Column1 CLOB)");
InputStream is = new FileInputStream("C:/__tmp/MIME/stuff.txt");
Reader rdr = new InputStreamReader(is, StandardCharsets.ISO_8859_1);
PreparedStatement ps = con.prepareStatement(
"INSERT INTO Table1 (Column1) VALUES (?)");
ps.setCharacterStream(1, rdr);
ps.executeUpdate();
ResultSet rs = s.executeQuery(
"SELECT Column1 FROM Table1");
int rowNumber = 0;
while (rs.next()) {
String str = rs.getString("Column1");
System.out.println(
String.format(
"Row %d: CLOB is %d character(s) long.",
++rowNumber,
str.length()));
}
rs.close();
} catch (Exception e) {
e.printStackTrace();
} finally {
con.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
It reads the text file
02/15/2014 10:55 358,785 stuff.txt
writes the file contents to a CLOB column in an H2 database, reads the data back from the database, and produces the following console output:
Row 1: CLOB is 358785 character(s) long.