postgresql java数组插入postgres

Question

我试图在postgres中插入java数组，但出现以下错误：

Exception in thread "main" org.postgresql.util.PSQLException: No value specified for parameter 2

代码如下：

public static void main(String[] args) throws SQLException {
    String sku = "1";
    String[] cross = { "0514", "0414", "0314", "0214", "0114", "1213", "1113", 
        "1013", "0913", "0813", "0713", "0613" };
    String sqlString = "Insert into dbo.Inventory_Metrics skus, cross values(?,?)";
    Connection conn = DriverManager.getConnection(getPostgresConnUrl());
    PreparedStatement ps = conn.prepareStatement(sqlString);
    ps.setObject(1, sku);
    ps.setObject(1, cross, java.sql.Types.VARCHAR, cross.length);

    //This next line throws the error
    int status = ps.executeUpdate();
    ps.close();
    System.out.print(status);
}

public static String getPostgresConnUrl() {
    String database = "mycode";
    String userName = "xxxxxxxx";
    String password = "xxxxxxxx";
    return "jdbc:postgresql://xxx.xxx.xxx.xxx:xxxx/" + database + "?user=" + 
        userName + "&password=" + password; 
}