String sql = "insert into table values (?, ?, ?, ?, ?, ?, ?)";
PreparedStatement ps = prepareStatement(sql);

while(readline) {
    String line = "1, 2, 3, 4, 5, 6, 7";
    String[] s = line.split(", ");

    for(int i = 0; i < s.length; i++) {
        ps.setString(i + 1, s[i]);
    }

    ps.addBatch();
}

ps.execute();

------解决方案--------------------
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Java code

String sql = "insert into table values (?, ?, ?, ?, ?, ?, ?)";
PreparedStatement ps = prepareStatement(sql);

while(readline) {
    String line = "1, 2, 3, 4, 5, 6, 7";
    String[] ……