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JAVA电子合同小程序实现源码uniapp开源代码

news 2026/6/7 10:41:34

以下是一个基于UniApp框架的Java电子合同小程序实现源码的代码片段，涵盖核心功能和模块。由于篇幅限制，这里提供关键部分的实现逻辑和代码示例，完整项目需结合具体业务需求扩展。

核心模块结构

project-root ├── common // 公共工具类 │ ├── api.js // 接口请求封装 │ ├── crypto.js // 加密工具 ├── components // 通用组件 │ ├── sign-pad.vue // 手写签名组件 │ └── contract-card.vue // 合同卡片 ├── pages // 页面目录 │ ├── index // 首页 │ ├── sign // 签署页 │ └── manage // 合同管理 ├── static // 静态资源 └── uni_modules // 插件依赖

关键代码片段

1. 手写签名组件 (sign-pad.vue)

<template> <view class="sign-pad"> <canvas canvas-id="signCanvas" @touchstart="handleTouchStart" @touchmove="handleTouchMove" @touchend="handleTouchEnd" ></canvas> <button @click="clearCanvas">清除</button> </view> </template> <script> export default { data() { return { ctx: null, points: [] } }, mounted() { this.ctx = uni.createCanvasContext('signCanvas', this) }, methods: { handleTouchStart(e) { this.points = [{x: e.touches[0].x, y: e.touches[0].y}] }, handleTouchMove(e) { const newPoint = {x: e.touches[0].x, y: e.touches[0].y} this.points.push(newPoint) if (this.points.length >= 2) { this.ctx.moveTo(this.points[0].x, this.points[0].y) this.ctx.lineTo(newPoint.x, newPoint.y) this.ctx.stroke() this.ctx.draw(true) this.points = [newPoint] } }, handleTouchEnd() { this.$emit('signComplete', this.getCanvasImage()) }, getCanvasImage() { return new Promise(resolve => { uni.canvasToTempFilePath({ canvasId: 'signCanvas', success: res => resolve(res.tempFilePath) }, this) }) }, clearCanvas() { this.ctx.clearRect(0, 0, 300, 150) this.ctx.draw(true) } } } </script>

2. 合同签署逻辑 (sign.vue)

export default { data() { return { contractId: '', contractContent: '', signImage: null } }, onLoad(options) { this.contractId = options.id this.loadContract() }, methods: { async loadContract() { const res = await uni.request({ url: '/api/contract/detail', data: { id: this.contractId } }) this.contractContent = res.data.content }, async submitSign() { if (!this.signImage) { uni.showToast({ title: '请完成签名', icon: 'none' }) return } const formData = { contractId: this.contractId, signImage: this.signImage, timestamp: Date.now() } uni.showLoading({ title: '签署中...' }) try { await uni.request({ url: '/api/contract/sign', method: 'POST', data: formData }) uni.redirectTo({ url: '/pages/index/index' }) } catch (e) { console.error(e) } finally { uni.hideLoading() } } } }

3. 后端接口示例 (Spring Boot)

@RestController @RequestMapping("/api/contract") public class ContractController { @PostMapping("/sign") public ResponseEntity<?> signContract(@RequestBody SignRequest request) { // 1. 验证合同有效性 Contract contract = contractRepository.findById(request.getContractId()) .orElseThrow(() -> new RuntimeException("合同不存在")); // 2. 存储签名图片 String signPath = fileStorageService.upload(request.getSignImage()); // 3. 生成PDF合同 byte[] pdfBytes = pdfGenerator.generate(contract, signPath); // 4. 存证区块链 String txHash = blockchainService.storeHash( DigestUtils.sha256Hex(pdfBytes) ); // 5. 更新数据库 contract.setStatus("SIGNED"); contract.setSignTime(new Date()); contract.setTxHash(txHash); contractRepository.save(contract); return ResponseEntity.ok().build(); } }

4. 加密工具类 (crypto.js)

import { SM2, SM3, SM4 } from 'sm-crypto' // 国密SM2加密 export function encryptSM2(plainText, publicKey) { return SM2.doEncrypt(plainText, publicKey) } // 生成合同哈希 export function generateContractHash(content) { return SM3(content) } // 敏感数据加密 export function encryptSensitiveData(data, key) { return SM4.encrypt(data, key) }