SpringBoot+React实现计算个人所得税
前言
在报表数据处理中,Excel公式拥有强大而多样的功能,广泛应用于各个业务领域。无论是投资收益计算、财务报表编制还是保险收益估算,Excel公式都扮演着不可或缺的角色。传统的做法是直接依赖Excel来实现复杂的业务逻辑,并生成相应的Excel文件。因此只需在预设位置输入相应参数,Excel公式即可被激活,迅速计算并呈现结果。正因如此,在这类场景中,企业积累了大量用于计算的Excel文件,它们已经成为了无价的财富。
然而,传统的Excel文件方式存在难以管理和数据不安全的缺点。为了解决这些问题,可以采用B/S架构+Excel组件库的方式。
本文将以个人所得税的计算为例,使用React+Spring Boot+GcExcel来实现。首先准备好Excel文件,按照国家税务总局提供的个税计算页面进行创建。
个人所得税的收入类型有8种:
- 工资薪金所得
- 年终奖所得
- 劳务报酬所得
- 个体工商户、生产经营所得
- 酬劳所得
- 偶然所得
- 利息、股息、红利所得
- 财产转让所得
其中,工资薪金所得最为复杂,包括社会保险和专项扣除。每种类型的计税方式都不同,为了便于理解,我们为每个类型创建了一个工作表进行计算。
以下是准备好的Excel文件,其中蓝色部分为需要输入参数的单元格,其他单元格将自动计算。
完成准备工作后,下面开始前后端工程的搭建。
实践
前端 React
创建React工程
新建一个文件夹,如TaxCalculator,进入文件夹,在资源管理器的地址栏里输入cmd,然后回车,打开命令行窗口。使用下面的代码创建名为client-app的react app。
npx create-react-app salary-client
进入刚创建的salary-client文件夹,使用IDE,比如VisualStudio Code打开文件夹。
界面部分
个人所得税涉及的收入类型一共有8种,其中(“酬劳所得”,“偶然所得”,“利息、股息、红利所得”,“财产转让所得”)四种的计算方式接近,UI布局相似,借助React的component特性,最终需要提供5种表单界面。
如下图所示:
为了让UI看起来更好看一些,可以先引入一个UI框架,这里我们使用了MUI。
npm install @mui/material @emotion/react @emotion/styled
首先,更新Src/App.js的代码,其中添加了DarkMode的Theme, 代码如下:
import './App.css'; import { ThemeProvider } from '@emotion/react'; import { createTheme } from '@mui/material'; import { FormContainer } from './Component/FormContainer'; const darkTheme = createTheme({ palette: { mode: 'dark', }, }); function App() { return ( <ThemeProvider theme={darkTheme}> <div className="App-header"> <h2>个人所得税计算器</h2> <FormContainer></FormContainer> </div> </ThemeProvider> ); } export default App;
可以看到,App.js中引用了FormContainer,下来添加 ./Component/FormContainer.js。
FormContainer主要是提供一个Selector,让用户选择收入类型,根据选择的类型渲染不同的组件。
import React, { useState } from 'react'; import { SalaryIncome } from "./SalaryIncome" import { NativeSelect, FormControl } from '@mui/material'; import { BounsIncome } from './BounsIncome'; import { CommercialIncome } from './CommercialIncome'; import { LaborIncome } from './LaborIncome'; import { OtherIncome } from './OtherIncome'; export const FormContainer = () => { const [calcType, setCalcType] = useState("工资薪金所得"); const GetIncomeControl = () => { switch (calcType) { case "工资薪金所得": return <SalaryIncome calcType={calcType}></SalaryIncome>; case "年终奖所得": return <BounsIncome calcType={calcType}></BounsIncome>; case "劳务报酬所得": return <LaborIncome calcType={calcType}></LaborIncome>; case "个体工商户、生产经营所得": return <CommercialIncome calcType={calcType}></CommercialIncome>; default: return <OtherIncome calcType={calcType}></OtherIncome>; } } return ( <div style={{ width: "60vw", marginTop: "5vh" }}> <FormControl fullWidth sx={{ marginBottom: 2 }}> <NativeSelect labelId="demo-simple-select-label" id="demo-simple-select" value={calcType} label="类型" onChange={e => setCalcType(e.target.value)} > <option value="工资薪金所得">工资薪金所得</option> <option value="年终奖所得">年终奖所得</option> <option Item value="劳务报酬所得">劳务报酬所得</option> <option value="个体工商户、生产经营所得">个体工商户、生产经营所得</option> <option value="酬劳所得">酬劳所得</option> <option value="偶然所得">偶然所得</option> <option value="利息、股息、红利所得">利息、股息、红利所得</option> </NativeSelect> </FormControl> {GetIncomeControl()} </div>); }
例如:\<SalaryIncome calcType={calcType}\>\</SalaryIncome\>; 同时会将calcType传递进去。
接下来,分别创建几个xxxIncome组件。
1.工资薪金所得 SalaryIncome.js
import React, { useState } from 'react'; import { TextField, Button, Stack } from '@mui/material'; import axios from 'axios'; export const SalaryIncome = (props) => { const [income, setIncome] = useState(""); const [insurance, setInsurance] = useState(""); const [childEdu, setChildEdu] = useState(""); const [selfEdu, setSelfEdu] = useState(""); const [treatment, setTreatment] = useState(""); const [loans, setLoans] = useState(""); const [rent, setRent] = useState(""); const [elder, setElder] = useState(""); const [taxableIncome, setTaxableIncome] = useState(""); const [taxRate, setTaxRate] = useState(""); const [deduction, setDeduction] = useState(""); const [tax, setTax] = useState(""); const [takeHomeSalary, setTakeHomeSalary] = useState(""); async function calculateTax(event) { event.preventDefault(); let res = await axios.post("api/calcPersonTax", { calcType: props.calcType, income: income, insurance: insurance, childEdu: childEdu, selfEdu: selfEdu, treatment: treatment, loans: loans, rent: rent, elder: elder, }); if (res != null) { let data = res.data; setTaxableIncome(data.taxableIncome); setTaxRate(data.taxRate); setDeduction(data.deduction); setTax(data.tax); setTakeHomeSalary(data.takeHomeSalary); } } function reset(event) { event.preventDefault(); setIncome(""); setInsurance(""); setChildEdu(""); setSelfEdu(""); setTreatment(""); setLoans(""); setRent(""); setElder(""); setTaxableIncome(""); setTaxRate(""); setDeduction(""); setTax(""); setTakeHomeSalary(""); } return ( <div> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='primary' label="税前工资" onChange={e => setIncome(e.target.value)} value={income} fullWidth required size="small"/> <TextField type="text" variant='outlined' color='secondary' label="社会保险/公积金" onChange={e => setInsurance(e.target.value)} value={insurance} fullWidth size="small"/> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' label="子女教育专项扣除" onChange={e => setChildEdu(e.target.value)} value={childEdu} fullWidth size="small"/> <TextField type="text" variant='outlined' color='secondary' label="继续教育专项扣除" onChange={e => setSelfEdu(e.target.value)} value={selfEdu} fullWidth size="small"/> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' label="大病医疗专项扣除" onChange={e => setTreatment(e.target.value)} value={treatment} fullWidth size="small"/> <TextField type="text" variant='outlined' color='secondary' label="住房贷款利息专项扣除" onChange={e => setLoans(e.target.value)} value={loans} fullWidth size="small"/> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' label="住房租金专项扣除" onChange={e => setRent(e.target.value)} value={rent} fullWidth size="small"/> <TextField type="text" variant='outlined' color='secondary' label="赡养老人专项扣除" onChange={e => setElder(e.target.value)} value={elder} fullWidth size="small"/> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' label="起征点" value="5000 元/月" fullWidth disabled size="small"/> </Stack> <hr></hr> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <Button variant="outlined" color="primary" onClick={calculateTax} fullWidth size="large">计算</Button> <Button variant="outlined" color="secondary" onClick={reset} fullWidth size="large">重置</Button> </Stack> <hr></hr> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' label="应纳税所得额" value={taxableIncome} fullWidth disabled size="small"/> <TextField type="text" variant='outlined' color='secondary' label="税率" value={taxRate} fullWidth disabled size="small"/> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' label="速算扣除数" value={deduction} fullWidth disabled size="small"/> <TextField type="text" variant='outlined' color='secondary' label="应纳税额" value={tax} fullWidth disabled size="small"/> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' label="税后工资" value={takeHomeSalary} fullWidth disabled size="small"/> </Stack> </div> ) }
2.年终奖金所得 BounsIncome.js
import React, { useState } from 'react'; import { TextField, Button, Stack } from '@mui/material'; import axios from 'axios'; export const BounsIncome = (props) => { const [income, setIncome] = useState(""); const [taxableIncome, setTaxableIncome] = useState(""); const [taxRate, setTaxRate] = useState(""); const [deduction, setDeduction] = useState(""); const [monthlyWage, setMonthlyWage] = useState(""); const [tax, setTax] = useState(""); const [takeHomeSalary, setTakeHomeSalary] = useState(""); async function calculateTax(event) { event.preventDefault(); let res = await axios.post("api/calcPersonTax", { calcType: props.calcType, income: income, }); if (res != null) { let data = res.data; setTaxableIncome(data.taxableIncome); setTaxRate(data.taxRate); setDeduction(data.deduction); setMonthlyWage(data.monthlyWage); setTax(data.tax); setTakeHomeSalary(data.takeHomeSalary); } } function reset(event) { event.preventDefault(); setIncome(""); setTaxableIncome(""); setTaxRate(""); setDeduction(""); setMonthlyWage(""); setTax(""); setTakeHomeSalary(""); } return ( <div> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='primary' size="small" label="税前工资" onChange={e => setIncome(e.target.value)} value={income} fullWidth required /> </Stack> <hr></hr> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <Button variant="outlined" color="primary" onClick={calculateTax} fullWidth size="large">计算</Button> <Button variant="outlined" color="secondary" onClick={reset} fullWidth size="large">重置</Button> </Stack> <hr></hr> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' size="small" label="应纳税所得额" value={taxableIncome} fullWidth disabled /> <TextField type="text" variant='outlined' color='secondary' size="small" label="税率" value={taxRate} fullWidth disabled /> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' size="small" label="速算扣除数" value={deduction} fullWidth disabled /> <TextField type="text" variant='outlined' color='secondary' size="small" label="平均每月工资" value={monthlyWage} fullWidth disabled /> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' size="small" label="应纳税额" value={tax} fullWidth disabled /> <TextField type="text" variant='outlined' color='secondary' size="small" label="税后工资" value={takeHomeSalary} fullWidth disabled /> </Stack> </div> ) }
3.劳务报酬所得 LaborIncome.js
import React, { useState } from 'react'; import { TextField, Button, Stack } from '@mui/material'; import axios from 'axios'; export const LaborIncome = (props) => { const [income, setIncome] = useState(""); const [taxableIncome, setTaxableIncome] = useState(""); const [taxRate, setTaxRate] = useState(""); const [deduction, setDeduction] = useState(""); const [nonTaxablePart, setNonTaxablePart] = useState(""); const [tax, setTax] = useState(""); const [takeHomeSalary, setTakeHomeSalary] = useState(""); async function calculateTax(event) { event.preventDefault(); let res = await axios.post("api/calcPersonTax", { calcType: props.calcType, income: income, }); if (res != null) { let data = res.data; setTaxableIncome(data.taxableIncome); setTaxRate(data.taxRate); setDeduction(data.deduction); setNonTaxablePart(data.nonTaxablePart); setTax(data.tax); setTakeHomeSalary(data.takeHomeSalary); } } function reset(event) { event.preventDefault(); setIncome(""); setTaxableIncome(""); setTaxRate(""); setDeduction(""); setNonTaxablePart(""); setTax(""); setTakeHomeSalary(""); } return ( <div> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='primary' size="small" label="税前工资" onChange={e => setIncome(e.target.value)} value={income} fullWidth required /> </Stack> <hr></hr> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <Button variant="outlined" color="primary" onClick={calculateTax} fullWidth size="large">计算</Button> <Button variant="outlined" color="secondary" onClick={reset} fullWidth size="large">重置</Button> </Stack> <hr></hr> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' size="small" label="应纳税所得额" value={taxableIncome} fullWidth disabled /> <TextField type="text" variant='outlined' color='secondary' size="small" label="税率" value={taxRate} fullWidth disabled /> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' size="small" label="速算扣除数" value={deduction} fullWidth disabled /> <TextField type="text" variant='outlined' color='secondary' size="small" label="减除费用" value={nonTaxablePart} fullWidth disabled /> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' size="small" label="应纳税额" value={tax} fullWidth disabled /> <TextField type="text" variant='outlined' color='secondary' size="small" label="税后工资" value={takeHomeSalary} fullWidth disabled /> </Stack> </div> ) }
4.个体工商户、生产经营所得 CommercialIncome.js
import React, { useState } from 'react'; import { TextField, Button, Stack } from '@mui/material'; import axios from 'axios'; export const CommercialIncome = (props) => { const [income, setIncome] = useState(""); const [taxableIncome, setTaxableIncome] = useState(""); const [taxRate, setTaxRate] = useState(""); const [deduction, setDeduction] = useState(""); const [tax, setTax] = useState(""); const [takeHomeSalary, setTakeHomeSalary] = useState(""); async function calculateTax(event) { event.preventDefault(); let res = await axios.post("api/calcPersonTax", { calcType: props.calcType, income: income, }); if (res != null) { let data = res.data; setTaxableIncome(data.taxableIncome); setTaxRate(data.taxRate); setDeduction(data.deduction); setTax(data.tax); setTakeHomeSalary(data.takeHomeSalary); } } function reset(event) { event.preventDefault(); setIncome(""); setTaxableIncome(""); setTaxRate(""); setDeduction(""); setTax(""); setTakeHomeSalary(""); } return ( <div> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='primary' size="small" label="税前工资" onChange={e => setIncome(e.target.value)} value={income} fullWidth required /> </Stack> <hr></hr> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <Button variant="outlined" color="primary" onClick={calculateTax} fullWidth size="large">计算</Button> <Button variant="outlined" color="secondary" onClick={reset} fullWidth size="large">重置</Button> </Stack> <hr></hr> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' size="small" label="应纳税所得额" value={taxableIncome} fullWidth disabled /> <TextField type="text" variant='outlined' color='secondary' size="small" label="税率" value={taxRate} fullWidth disabled /> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' size="small" label="速算扣除数" value={deduction} fullWidth disabled /> <TextField type="text" variant='outlined' color='secondary' size="small" label="应纳税额" value={tax} fullWidth disabled /> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' size="small" label="税后工资" value={takeHomeSalary} fullWidth disabled /> </Stack> </div> ) }
5.余下四种类型 OtherIncome.js
import React, { useState } from 'react'; import { TextField, Button, Stack } from '@mui/material'; import axios from 'axios'; export const OtherIncome = (props) => { const [income, setIncome] = useState(""); const [taxableIncome, setTaxableIncome] = useState(""); const [taxRate, setTaxRate] = useState(""); const [tax, setTax] = useState(""); const [takeHomeSalary, setTakeHomeSalary] = useState(""); async function calculateTax(event) { event.preventDefault(); let res = await axios.post("api/calcPersonTax", { calcType: props.calcType, income: income, }); if (res != null) { let data = res.data; setTaxableIncome(data.taxableIncome); setTaxRate(data.taxRate); setTax(data.tax); setTakeHomeSalary(data.takeHomeSalary); } } function reset(event) { event.preventDefault(); setIncome(""); setTaxableIncome(""); setTaxRate(""); setTax(""); setTakeHomeSalary(""); } return ( <div> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='primary' size="small" label={props.calcType} onChange={e => setIncome(e.target.value)} value={income} fullWidth required /> </Stack> <hr></hr> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <Button variant="outlined" color="primary" onClick={calculateTax} fullWidth size="large">计算</Button> <Button variant="outlined" color="secondary" onClick={reset} fullWidth size="large">重置</Button> </Stack> <hr></hr> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' size="small" label="应纳税所得额" value={taxableIncome} fullWidth disabled /> <TextField type="text" variant='outlined' color='secondary' size="small" label="税率" value={taxRate} fullWidth disabled /> </Stack> <Stack spacing={2} direction="row" sx={{ marginBottom: 2 }}> <TextField type="text" variant='outlined' color='secondary' size="small" label="应纳税额" value={tax} fullWidth disabled /> <TextField type="text" variant='outlined' color='secondary' size="small" label="税后工资" value={takeHomeSalary} fullWidth disabled /> </Stack> </div> ) }
此时,完成UI部分后,可以尝试运行起来,效果如下:
//通过代码运行React app npm start
可以试着填一些数据,但是当我们点击计算时会报错,这是因为服务端还没有准备好。
前端请求部分
熟悉Axios的同学可以跳过这部分,前面的代码里,已经给出了Axois发送请求的代码。
可以看到无论是哪一种类型的组件,请求都发送到了相同的url("api/calcPersonTax"),以SalaryIncome为例,代码如下:
async function calculateTax(event) { event.preventDefault(); let res = await axios.post("api/calcPersonTax", { calcType: props.calcType, income: income, insurance: insurance, childEdu: childEdu, selfEdu: selfEdu, treatment: treatment, loans: loans, rent: rent, elder: elder, }); if (res != null) { let data = res.data; setTaxableIncome(data.taxableIncome); setTaxRate(data.taxRate); setDeduction(data.deduction); setTax(data.tax); setTakeHomeSalary(data.takeHomeSalary); } }
可以看到,整个请求变得非常简单,主要是把state的值取出来,通过post请求发送到服务端,然后根据返回值,把数据重新设给state,这样就完成UI数据的更新了。
配置请求转发中间件
我们在请求时访问的是相对地址,React本身有一个nodeJS,默认的端口是3000,而Spring Boot的默认端口是8080。前端直接访问会有跨域的问题,因此我们要做一个代理的配置。
在src文件夹下面添加文件,名为setupProxy.js,代码如下:
const { createProxyMiddleware } = require('http-proxy-middleware'); module.exports = function(app) { app.use( '/api', createProxyMiddleware({ target: 'http://localhost:8080', changeOrigin: true, }) ); };
服务端 Spring Boot
创建工程及添加依赖
使用IDEA创建一个Spring Boot工程,如果使用的是社区(community)版本,不能直接创建Spring Boot项目,那可以先创建一个空项目,idea创建project的过程,就跳过了,这里我们以创建了一个gradle项目为例。
plugins { id 'org.springframework.boot' version '3.0.0' id 'io.spring.dependency-management' version '1.1.0' id 'java' id 'war' } group = 'org.example' version = '1.0-SNAPSHOT' repositories { mavenCentral() } dependencies { implementation 'org.springframework.boot:spring-boot-starter-web' implementation 'com.grapecity.documents:gcexcel:6.2.0' implementation 'javax.json:javax.json-api:1.1.4' providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat' testImplementation('org.springframework.boot:spring-boot-starter-test') } test { useJUnitPlatform() }
在dependencies 中,我们除了依赖Spring Boot之外,还添加了GcExcel的依赖,后面导出时会用到GcExcel,目前的版本是6.2.0。
添加API
在Application类上,添加属性 @RequestMapping("/api").,并添加 calcPersonTax API。
@Spring BootApplication @RestController @RequestMapping("/api") public class SalaryTaxCalculator { public static void main(String[] args) { SpringApplication.run(SalaryTaxCalculator.class, args); } @PostMapping("/calcPersonTax") public CalcResult calcTax(@RequestBody CalcParameter par) { Workbook workbook = new Workbook(); workbook.open(GetResourcePath()); return CalcInternal(workbook, par); } private String GetResourcePath(){ return Objects.requireNonNull(SalaryTaxCalculator.class.getClassLoader().getResource("PersonalTaxCalcEngine.xlsx")).getPath(); } private CalcResult CalcInternal(Workbook workbook, CalcParameter par) { //todo } }
可以看到在CalcInternal方法内,我们使用GcExcel,根据calcType来判断使用哪一个sheet来进行计算。对不同Sheet只需要通过GcExcel设值,并从特定的格子里取值即可。
同时,我们还需要创建两个类,CalcParameter和CalcResult。CalcParameter用于从request中把post的data解析出来,CalcResult用于在response中返回的数据。
CalcParameter:
public class CalcParameter { public String calcType; public double income; public double insurance; public double childEdu; public double selfEdu; public double treatment; public double loans; public double rent; public double elder; }
CalcResult:
public class CalcResult { public double taxableIncome; public double taxRate; public double deduction; public double tax; public double takeHomeSalary; public double monthlyWage; public double nonTaxablePart; }
使用GcExcel完成公式计算
前面我们定义了 CalcInternal,在 CalcInternal 中,我们需要使用GcExcel来完成公式计算。
GcExcel的公式计算是自动完成的,我们使用workbook打开Excel文件后,只需要set相关的value。之后在取值时,GcExcel会自动计算响应公式的值。
private CalcResult CalcInternal(Workbook workbook, CalcParameter par) { var result = new CalcResult(); var sheet = workbook.getWorksheets().get(par.calcType); switch (par.calcType) { case "工资薪金所得" -> { sheet.getRange("B1").setValue(par.income); sheet.getRange("D1").setValue(par.insurance); sheet.getRange("B2").setValue(par.childEdu); sheet.getRange("D2").setValue(par.selfEdu); sheet.getRange("B3").setValue(par.treatment); sheet.getRange("D3").setValue(par.loans); sheet.getRange("B4").setValue(par.rent); sheet.getRange("D4").setValue(par.elder); result.taxableIncome = (double) sheet.getRange("B9").getValue(); result.taxRate = (double) sheet.getRange("D9").getValue(); result.deduction = (double) sheet.getRange("B10").getValue(); result.tax = (double) sheet.getRange("D10").getValue(); result.takeHomeSalary = (double) sheet.getRange("B11").getValue(); } case "年终奖所得" -> { sheet.getRange("B1").setValue(par.income); result.taxableIncome = (double) sheet.getRange("B3").getValue(); result.taxRate = (double) sheet.getRange("D3").getValue(); result.deduction = (double) sheet.getRange("B4").getValue(); result.monthlyWage = (double) sheet.getRange("D4").getValue(); result.tax = (double) sheet.getRange("B5").getValue(); result.takeHomeSalary = (double) sheet.getRange("D5").getValue(); } case "劳务报酬所得" -> { sheet.getRange("B1").setValue(par.income); result.taxableIncome = (double) sheet.getRange("B3").getValue(); result.taxRate = (double) sheet.getRange("D3").getValue(); result.deduction = (double) sheet.getRange("B4").getValue(); result.nonTaxablePart = (double) sheet.getRange("D4").getValue(); result.tax = (double) sheet.getRange("B5").getValue(); result.takeHomeSalary = (double) sheet.getRange("D5").getValue(); } case "个体工商户、生产经营所得" -> { sheet.getRange("B1").setValue(par.income); result.taxableIncome = (double) sheet.getRange("B3").getValue(); result.taxRate = (double) sheet.getRange("D3").getValue(); result.deduction = (double) sheet.getRange("B4").getValue(); result.tax = (double) sheet.getRange("D4").getValue(); result.takeHomeSalary = (double) sheet.getRange("B5").getValue(); } default -> { sheet.getRange("B1").setValue(par.income); result.taxableIncome = (double) sheet.getRange("B3").getValue(); result.taxRate = (double) sheet.getRange("D3").getValue(); result.tax = (double) sheet.getRange("B4").getValue(); result.takeHomeSalary = (double) sheet.getRange("D4").getValue(); } } return result; }
这样就完成了服务端的代码。
最终效果
我们可以使用工资薪金所得试验一下,可以看到数据被计算出来了。因为目的是为了分享服务端公式计算的方案,所以计算的结果是否正确,就不做细致考虑。
总结
个税计算的场景并不复杂,主要是通过Excel完成公式计算即可,在服务端使用GcExcel可以大幅度降低前后端的开发难度,系统的搭建过程可以完全不需要考虑计算的逻辑。
在实际的公式计算场景中,可能往往会比个税计算的场景复杂,借助GcExcel这样Excel组件库,可以很容易的把已有的Excel文件迁移到线上,提高工作效率。
另外,本文中分享的代码并不是最符合实际工作中的要求,读者还可以从以下角度去优化自己的代码。
- 收入类型可以抽成枚举,这样维护和使用起来更容易。
- 目前每一个react组件里的冗余度还不低,还可以继续抽象组件,避免重复写代码。
- 在服务端,因为公式计算的逻辑是不会变的,在实际场景中,也有可能同一时间要加载复数个Excel文件,可以考虑把workbook常驻内存,来提高性能。
以上就是SpringBoot+React实现计算个人所得税的详细内容,更多关于SpringBoot Reac计算个人所得税的资料请关注脚本之家其它相关文章!
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