Merge pull request #6 from qq1060656096/develop

Develop

Author: qq1060656096

README.md

@@ -30,12 +30,34 @@ use Zwei\LoanCalculator\Calculator\EqualTotalPaymentCalculator;
 use Zwei\LoanCalculator\Calculator\EqualPrincipalPaymentCalculator;
 use Zwei\LoanCalculator\Calculator\MonthlyInterestPaymentCalculator;
 use Zwei\LoanCalculator\Calculator\OncePayPrincipalInterestPaymentCalculator;
+use \Zwei\LoanCalculator\PaymentCalculatorFactory;
 
 $principal          = 50000;// 本金
 $yearInterestRate   = "0.10";// 年利率10%
 $months             = 12;// 借款12个月
 $time               = strtotime("2018-03-20 10:05");// 借款时间
 $decimalDigits      = 2;// 保留小数点后3位,默认保留2位
+
+// 等额本金计算器
+$obj = PaymentCalculatorFactory::getPaymentCalculatorObj(PaymentCalculatorFactory::TYPE_EQUAL_PRINCIPAL, $principal, $yearInterestRate, $month, 0);
+$lists = $obj->getPlanLists();
+print_r($lists);
+
+// 等额本息计算器
+$obj = PaymentCalculatorFactory::getPaymentCalculatorObj(PaymentCalculatorFactory::TYPE_EQUAL_TOTAL_PAYMENT, $principal, $yearInterestRate, $month, 0);
+$lists = $obj->getPlanLists();
+print_r($lists);
+
+// 每月还息到期还本还款方式计算器
+$obj = PaymentCalculatorFactory::getPaymentCalculatorObj(PaymentCalculatorFactory::TYPE_MONTHLY_INTEREST, $principal, $yearInterestRate, $month, 0);
+$lists = $obj->getPlanLists();
+print_r($lists);
+
+// 一次性还本付息还款方式计算器
+$obj = PaymentCalculatorFactory::getPaymentCalculatorObj(PaymentCalculatorFactory::TYPE_ONCE_PAY_PRINCIPAL_INTEREST, $principal, $yearInterestRate, $month, 0);
+$lists = $obj->getPlanLists();
+print_r($lists);
+
 // 等额本金计算器
 $obj                = new EqualPrincipalPaymentCalculator($principal, $yearInterestRate, $months, $time, $decimalDigits);
 $planLists          = $obj->getPlanLists();// 获取还款计划

src/PaymentCalculatorFactory.php

@@ -0,0 +1,71 @@
+<?php
+namespace Zwei\LoanCalculator;
+
+use Zwei\LoanCalc\Exception\ParamsException;
+use Zwei\LoanCalculator\Calculator\EqualTotalPaymentCalculator;
+use Zwei\LoanCalculator\Calculator\EqualPrincipalPaymentCalculator;
+use Zwei\LoanCalculator\Calculator\MonthlyInterestPaymentCalculator;
+use Zwei\LoanCalculator\Calculator\OncePayPrincipalInterestPaymentCalculator;
+
+/**
+ * 还款计算器工厂类
+ * Class PaymentCalculatorFactory
+ * @package Zwei\LoanCalculator
+ */
+class PaymentCalculatorFactory
+{
+    /**
+     * 等额本金计算器
+     */
+    const TYPE_EQUAL_PRINCIPAL = 1;
+
+    /**
+     * 等额本息计算器
+     */
+    const TYPE_EQUAL_TOTAL_PAYMENT = 2;
+
+    /**
+     * 每月还息到期还本还款方式计算器
+     */
+    const TYPE_MONTHLY_INTEREST = 3;
+
+    /**
+     * 一次性还本付息还款方式计算器
+     */
+    const TYPE_ONCE_PAY_PRINCIPAL_INTEREST = 4;
+
+    /**
+     * 获取计算器对象
+     *
+     * @param integer $type 类型
+     * @param float $principal 本金
+     * @param float $yearInterestRate 年利率
+     * @param int $months 月数
+     * @param int $time 借款时间
+     * @param int $decimalDigits 保留几位小数(默认2)
+     * @return PaymentCalculatorAbstract
+     * @throws ParamsException
+     */
+    public static function getPaymentCalculatorObj($type, $principal, $yearInterestRate, $months, $time, $decimalDigits = 2)
+    {
+        switch ($type) {
+            case self::TYPE_EQUAL_PRINCIPAL:
+                // 等额本金计算器
+                $obj = new EqualPrincipalPaymentCalculator($principal, $yearInterestRate, $months, $time, $decimalDigits);
+                break;
+            case self::TYPE_EQUAL_TOTAL_PAYMENT:
+                $obj = new EqualTotalPaymentCalculator($principal, $yearInterestRate, $months, $time, $decimalDigits);
+                break;
+            case self::TYPE_MONTHLY_INTEREST:
+                $obj = new MonthlyInterestPaymentCalculator($principal, $yearInterestRate, $months, $time, $decimalDigits);
+                break;
+            case self::TYPE_ONCE_PAY_PRINCIPAL_INTEREST:
+                $obj = new OncePayPrincipalInterestPaymentCalculator($principal, $yearInterestRate, $months, $time, $decimalDigits);
+                break;
+            default:
+                throw new ParamsException('参数非法');
+                break;
+        }
+        return $obj;
+    }
+}