Home Web Front-end Front-end Q&A How to convert vue input amount to uppercase

How to convert vue input amount to uppercase

Apr 12, 2023 pm 01:55 PM

前言

在前端开发中,我们经常需要让用户输入金额,一般情况下都会使用 input 输入框来完成。但是,由于 input 输入框输入金额的数据类型是 Number,直接将其展示成大写金额,不仅难以实现,而且还十分麻烦。因此,我们需要一个可以将 input 输入框输入的金额转为大写金额的组件。

本篇文章将带领大家实现一个基于 Vue 框架的 input 金额转大写封装组件,通过该组件,我们可以将 input 输入框中输入的金额自动转换为大写金额,并将其展示在页面上。

实现思路

该组件实现的主要思路是,通过监听 input 输入框的值变化,获取输入框输入的金额,然后将金额转为大写金额,并将其渲染到界面上。在 Vue 中,我们可以通过 v-model 指令来监听 input 输入框的值变化。

在将金额转换为大写金额时,我们可以使用一个金额转换函数。该函数的实现过程中,需要用到金额的单位和数值。因此,我们需要定义一个金额转换函数,并对其进行封装,以方便在组件中调用。

组件实现

首先,我们需要创建一个 Vue 组件,命名为 AmountInput,该组件包含一个 input 输入框,用于获取用户输入的金额。然后,我们需要在该组件中定义一个 data 属性,用于存储用户输入的金额,并将其绑定到 input 输入框上。

<template>
  <div>
    <input type="number" v-model="amount" />
    <div>{{ convertedAmount }}</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      amount: 0,
      convertedAmount: "",
    };
  },
};
</script>
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在组件中,我们需要利用 computed 计算属性来监听 amount 数据的变化,并在数据变化时调用金额转换函数,将用户输入的金额转换为大写金额,并将其赋值给 convertedAmount 数据,用于展示在界面上。

<template>
  <div>
    <input type="number" v-model="amount" />
    <div>{{ convertedAmount }}</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      amount: 0,
    };
  },
  computed: {
    convertedAmount() {
      return this.convertToChinese(this.amount);
    },
  },
  methods: {
    convertToChinese(money) {
      // 金额转换函数的实现
    },
  },
};
</script>
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接下来,我们需要实现金额转换函数。在该函数中,我们需要将用户输入的金额转换为大写金额,并返回一个字符串类型的大写金额。金额转换函数的实现过程中,我们需要定义一个金额单位数组,用于存储不同金额位的单位。然后,我们需要将用户输入的金额将有点的整数部分和小数部分进行分离,分别将整数部分和小数部分转换成大写金额,并将它们拼接成一个字符串类型的大写金额。

<template>
  <div>
    <input type="number" v-model="amount" />
    <div>{{ convertedAmount }}</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      amount: 0,
    };
  },
  computed: {
    convertedAmount() {
      return this.convertToChinese(this.amount);
    },
  },
  methods: {
    convertToChinese(money) {
      const units = ["分", "角", "元", "拾", "佰", "仟", "万", "亿", "兆"];
      const characters = ["零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"];
      let moneyStr = money.toString();
      if (moneyStr === "0" || moneyStr === "0.00") {
        return "零元整";
      }
      if (!/^(\+|-)?\d+(\.\d+)?$/.test(moneyStr)) {
        return "请输入正确的金额格式";
      }
      if (moneyStr.indexOf(".") === -1) {
        moneyStr = moneyStr + ".00";
      }
      if (moneyStr.indexOf(".") === moneyStr.length - 2) {
        moneyStr = moneyStr + "0";
      }
      const integerPart = moneyStr.split(".")[0];
      const decimalPart = moneyStr.split(".")[1];
      let integerPartStr = "";
      for (let i = 0; i < integerPart.length; i++) {
        integerPartStr +=
          characters[parseInt(integerPart.charAt(i))] + units[8 - integerPart.length + i];
      }
      integerPartStr = integerPartStr
        .replace(/零([亿万仟佰拾]|[仟佰拾]{2})/g, "$1")
        .replace(/零+/g, "零")
        .replace(/零([角分])/g, "")
        .replace(/([亿万仟佰拾])([亿万仟佰拾])([亿万仟佰拾])/g, "$1零$2$3")
        .replace(/^元零?|零分/g, "")
        .replace(/([角分]{2})$/g, "");
      let decimalPartStr = "";
      if (decimalPart === "00") {
        decimalPartStr = "整";
      } else {
        decimalPartStr = characters[parseInt(decimalPart.charAt(0))] + "角";
        if (decimalPart.charAt(1) !== "0") {
          decimalPartStr += characters[parseInt(decimalPart.charAt(1))] + "分";
        }
      }
      return integerPartStr + decimalPartStr;
    },
  },
};
</script>
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最后,我们需要将 AmountInput 组件导出并注册到 Vue 中。

<template>
  <div>
    <amount-input />
  </div>
</template>

<script>
import AmountInput from "./components/AmountInput.vue";

export default {
  components: {
    AmountInput,
  },
};
</script>
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到这里,一个基于 Vue 框架的 input 金额转大写封装组件就完成了。通过此组件,我们可以轻松地将 input 输入框中输入的金额自动转换为大写金额,并将其展示在页面上。

结语

本篇文章主要介绍了一个基于 Vue 框架的 input 金额转大写封装组件的实现过程,并通过一个金额转换函数、监听 input 输入框的值变化以及 computed 计算属性,实现了该组件的功能。希望对大家学习 Vue 和前端开发有所帮助。

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