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82 lines
2.7 KiB
82 lines
2.7 KiB
package com.fr.plugin; |
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import com.fr.general.GeneralUtils; |
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import com.fr.intelli.record.Focus; |
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import com.fr.intelli.record.Original; |
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import com.fr.plugin.context.PluginContexts; |
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import com.fr.record.analyzer.EnableMetrics; |
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import com.fr.script.AbstractFunction; |
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import com.fr.stable.StringUtils; |
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import com.fr.stable.exception.FormulaException; |
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import com.fr.stable.fun.Authorize; |
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import java.math.BigDecimal; |
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/** |
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* @file: PACKAGE_NAME.PMT |
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* @desc: |
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* @date:2020/7/7 17:06 |
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* @author:yanghui |
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**/ |
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@EnableMetrics |
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@Authorize(callSignKey = FinanceFunctionConstants.PLUGIN_ID) |
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public class PMT extends AbstractFunction { |
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@Override |
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@Focus(id = "com.fr.plugin.function.finance", text = "Plugin-Test_Function_Finance", source = Original.PLUGIN) |
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public Object run(Object[] objects) throws FormulaException { |
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if (PluginContexts.currentContext().isAvailable()) { |
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return cal(objects); |
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} else { |
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return "插件未激活，请购买使用"; |
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} |
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} |
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private Object cal(Object[] objects) { |
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//年利率 |
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double rate = trans(objects[0]).doubleValue(); |
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//贷款期数 |
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double nper = trans(objects[1]).doubleValue(); |
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//贷款金额 |
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double pv= trans(objects[2]).doubleValue(); |
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if (objects.length == 3) { |
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return calculatePMT(rate, nper, pv, 0, 0); |
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} |
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else if (objects.length == 4) { |
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//fv为未来值（余值），或在最后一次付款后希望得到的现金余额，如果省略fv，则假设其值为零，也就是一笔贷款的未来值为零 |
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double fv = trans(objects[3]).doubleValue(); |
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return calculatePMT(rate, nper, pv, fv, 0); |
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}else if(objects.length == 5){ |
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//fv为未来值（余值），或在最后一次付款后希望得到的现金余额，如果省略fv，则假设其值为零，也就是一笔贷款的未来值为零 |
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double fv = trans(objects[3]).doubleValue(); |
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//Type数字0或1，用以指定各期的付款时间是在期初还是期末。1代表期初（先付：每期的第一天付），不输入或输入0代表期末（后付：每期的最后一天付） |
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int type=Integer.valueOf(objects[4].toString()); |
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return calculatePMT(rate,nper,pv,fv,type); |
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}else { |
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throw new RuntimeException("输入参数个数有误"); |
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} |
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} |
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private static BigDecimal trans(Object ele){ |
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if (ele == null|| StringUtils.isBlank(ele.toString())) { |
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return new BigDecimal("0"); |
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} |
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try{ |
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String val = GeneralUtils.objectToString(ele); |
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return new BigDecimal(val.trim()); |
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}catch(Exception e){ |
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throw new RuntimeException(e); |
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} |
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} |
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/** |
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* |
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* @param rate |
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* @param nper |
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* @param pv |
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* @return |
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*/ |
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public static double calculatePMT(double rate, double nper, double pv,double fv, int type) { |
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return -rate * (fv + pv * Math.pow(1 + rate, nper)) / ((Math.pow(1 + rate, nper) - 1) * (1 + rate * type)); |
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} |
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}
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