public class Main {    public static void main(String[] args) {        String[] fields = { "name", "position", "salary" };        String table = "employee";        String insert = buildInsertSql(table, fields);        System.out.println(insert);        String s = "INSERT INTO employee (name, position, salary) VALUES (?, ?, ?)";        System.out.println(s.equals(insert) ? "测试成功" : "测试失败");    }    static String buildInsertSql(String table, String[] fields) {        // TODO:        StringBuilder sb = new StringBuilder(new String("INSERT INTO " + table + " ("));        for (String f : fields) {            sb.append(f);            sb.append(", ");        }        int index = sb.lastIndexOf(", ");        sb.delete(index, index+2);        sb.append(") VALUES (");        for (String f : fields) {            sb.append('?');            sb.append(", ");        }        index = sb.lastIndexOf(", ");        sb.delete(index, index+2);        sb.append(')');        return sb.toString();    }}