合同开始日期：2023-01-01，结束日期：2026-01-01，免租起始期：2023-01-01，免租终止日期：023-01-31，收款方式为按3个月收一次，提前收款期为3个月，基本租期1年，月租单价500，超过基本租期后按2年一个周期递增，递增率为6%,按java7产生合同期内含收款日期、租期、租金的计划列表，配上代码说明

好的，根据您的要求，我来为您生成合同期内含收款日期、租期、租金的计划列表，并配上代码说明。以下是代码实现：

import java.time.LocalDate;
import java.time.Period;
import java.time.temporal.ChronoUnit;
import java.util.ArrayList;
import java.util.List;

public class Contract {
    private LocalDate startDate; // 合同开始日期
    private LocalDate endDate; // 合同结束日期
    private LocalDate rentFreeStartDate; // 免租起始期
    private LocalDate rentFreeEndDate; // 免租终止日期
    private int rentPaymentPeriod; // 收款周期，单位为月
    private int advancePaymentPeriod; // 提前收款期，单位为月
    private int baseLeasePeriod; // 基本租期，单位为年
    private double baseMonthlyRent; // 基本月租金
    private double incrementRate; // 递增率

    public Contract(LocalDate startDate, LocalDate endDate, LocalDate rentFreeStartDate, LocalDate rentFreeEndDate,
                    int rentPaymentPeriod, int advancePaymentPeriod, int baseLeasePeriod, double baseMonthlyRent,
                    double incrementRate) {
        this.startDate = startDate;
        this.endDate = endDate;
        this.rentFreeStartDate = rentFreeStartDate;
        this.rentFreeEndDate = rentFreeEndDate;
        this.rentPaymentPeriod = rentPaymentPeriod;
        this.advancePaymentPeriod = advancePaymentPeriod;
        this.baseLeasePeriod = baseLeasePeriod;
        this.baseMonthlyRent = baseMonthlyRent;
        this.incrementRate = incrementRate;
    }

    public List<PaymentPlan> generatePaymentPlan() {
        List<PaymentPlan> paymentPlanList = new ArrayList<>();
        LocalDate paymentDate = startDate;

        // 计算基本租期内的租金
        for (int i = 0; i < baseLeasePeriod * 12; i += rentPaymentPeriod) {
            // 判断是否在免租期内
            if (paymentDate.isBefore(rentFreeStartDate) || paymentDate.isAfter(rentFreeEndDate)) {
                double monthlyRent = baseMonthlyRent * Math.pow(1 + incrementRate / 100, i / 12);
                paymentPlanList.add(new PaymentPlan(paymentDate, rentPaymentPeriod, monthlyRent));
            }
            paymentDate = paymentDate.plusMonths(rentPaymentPeriod);
        }

        // 计算递增租期内的租金
        while (paymentDate.isBefore(endDate)) {
            int remainingMonths = (int) ChronoUnit.MONTHS.between(paymentDate, endDate);
            int currentLeasePeriod = (int) Math.ceil((double) remainingMonths / (12 * 2)) * 2;
            int currentRentPaymentPeriod = Math.min(currentLeasePeriod * 12, rentPaymentPeriod);
            double monthlyRent = baseMonthlyRent * Math.pow(1 + incrementRate / 100, baseLeasePeriod)
                    * Math.pow(1 + incrementRate / 100, (paymentDate.getYear() - startDate.getYear()) * 12)
                    * Math.pow(1 + incrementRate / 100, (paymentDate.getMonthValue() - startDate.getMonthValue()));
            paymentPlanList.add(new PaymentPlan(paymentDate, currentRentPaymentPeriod, monthlyRent));

            paymentDate = paymentDate.plusMonths(currentRentPaymentPeriod);
        }

        return paymentPlanList;
    }

    public static void main(String[] args) {
        Contract contract = new Contract(
                LocalDate.of(2023, 1, 1),
                LocalDate.of(2026, 1, 1),
                LocalDate.of(2023, 1, 1),
                LocalDate.of(2023, 1, 31),
                3,
                3,
                1,
                500,
                6
        );

        List<PaymentPlan> paymentPlanList = contract.generatePaymentPlan();

        // 打印每一笔租金的计划
        for (PaymentPlan paymentPlan : paymentPlanList) {
            System.out.println(paymentPlan.getPaymentDate() + " " + paymentPlan.getLeasePeriod()
                    + " months " + paymentPlan.getMonthlyRent() + " RMB/month");
        }
    }
}

class PaymentPlan {
    private LocalDate paymentDate; // 收款日期
    private int leasePeriod; // 租期，单位为月
    private double monthlyRent; // 月租金

    public PaymentPlan(LocalDate paymentDate, int leasePeriod, double monthlyRent) {
        this.paymentDate = paymentDate;
        this.leasePeriod = leasePeriod;
        this.monthlyRent = monthlyRent;
    }

    public LocalDate getPaymentDate() {
        return paymentDate;
    }

    public int getLeasePeriod() {
        return leasePeriod;
    }

    public double getMonthlyRent() {
        return monthlyRent;
    }
}

代码中，`Contract` 类表示合同，包含了合同的各项信息，如合同开始日期、结束日期、免租起始期、免租终止日期、收款周期、提前收款期、基本租期、基本月租金、递增率等。`generatePaymentPlan` 方法根据合同信息生成每一笔租金的计划，返回一个 `List`，其中每个元素是一个 `PaymentPlan` 对象，表示一笔租金的计划，包含了收款日期、租期、月租金等信息。

在 `main` 方法中，我们创建了一个 `Contract` 对象，并调用它的 `generatePaymentPlan` 方法生成租金计划。最后，我们遍历租金计划列表，打印每一笔租金的计划。