jdbc bath

conn = getConnection();
conn.setAutoCommit(false);
conn.setAutoCommit(false);
PreparedStatement ps = conn.prepareStatement("INSERT INTO user(id,name) VALUES(?, ?)");     
for (int i = 0; i < 10000; i++) {
    ps.setInt(1,i);
    ps.setString(2,"name_"+String.valueOf(i));
    ps.addBatch();
    //ps.clearParameters(); 这句话报空指针异常，不知为什么
}
ps.executeBatch();
conn.commit();