JAVA电子合同签章模块源码uniapp代码片段

以下是一个基于UniApp的Java电子合同签章模块的代码片段和实现思路包含核心功能模块和关键代码示例。内容经过精简完整实现需根据实际需求扩展。核心模块结构/src /common crypto.js // 加密算法工具 api.js // 网络请求封装 /components sign-pad.vue // 手写签章组件 pdf-viewer.vue // 合同预览组件 /pages contract/ index.vue // 合同列表页 detail.vue // 合同签署页 /platforms /android // 原生安卓签章模块 /ios // 原生iOS签章模块关键代码实现1. 手写签章组件 (sign-pad.vue)template view classsign-container canvas canvas-idsignCanvas touchstartonTouchStart touchmoveonTouchMove touchendonTouchEnd / button clickclearCanvas清除/button button clickconfirmSign确认签署/button /view /template script export default { data() { return { points: [], ctx: null } }, mounted() { this.ctx uni.createCanvasContext(signCanvas, this) }, methods: { onTouchStart(e) { this.points [{x: e.touches[0].x, y: e.touches[0].y}] }, onTouchMove(e) { const newPoint {x: e.touches[0].x, y: e.touches[0].y} this.points.push(newPoint) // 绘制路径 this.ctx.beginPath() this.ctx.moveTo(this.points[this.points.length-2].x, this.points[this.points.length-2].y) this.ctx.lineTo(newPoint.x, newPoint.y) this.ctx.setStrokeStyle(#000000) this.ctx.setLineWidth(3) this.ctx.stroke() this.ctx.draw(true) }, confirmSign() { uni.canvasToTempFilePath({ canvasId: signCanvas, success: (res) { this.$emit(signed, res.tempFilePath) } }) } } } /script2. PDF合同预览 (pdf-viewer.vue)// 使用PDF.js库实现 export default { props: { pdfUrl: String }, data() { return { numPages: 0, currentPage: 1 } }, methods: { async loadPDF() { const loadingTask pdfjsLib.getDocument(this.pdfUrl) const pdf await loadingTask.promise this.numPages pdf.numPages this.renderPage(pdf, 1) }, async renderPage(pdf, pageNum) { const page await pdf.getPage(pageNum) const viewport page.getViewport({ scale: 1.5 }) const canvas this.$refs.canvas const context canvas.getContext(2d) canvas.height viewport.height canvas.width viewport.width const renderContext { canvasContext: context, viewport: viewport } await page.render(renderContext).promise } } }3. 合同签署接口 (api.js)const BASE_URL https://api.e-contract.com/v1 export const signContract (params) { return uni.request({ url: ${BASE_URL}/contract/sign, method: POST, data: { contractId: params.contractId, signImage: params.signImage, timestamp: Date.now(), signPosition: params.position // {page: 1, x: 100, y: 200} }, header: { Content-Type: application/json, Authorization: Bearer ${uni.getStorageSync(token)} } }) }4. 安卓原生签章模块 (Java)public class SignModule { private static final int SIGN_COLOR Color.BLACK; private static final float STROKE_WIDTH 5f; public static Bitmap captureSignature(ViewGroup signLayout) { Bitmap bitmap Bitmap.createBitmap( signLayout.getWidth(), signLayout.getHeight(), Bitmap.Config.ARGB_8888 ); Canvas canvas new Canvas(bitmap); signLayout.draw(canvas); return compressBitmap(bitmap); } private static Bitmap compressBitmap(Bitmap src) { ByteArrayOutputStream stream new ByteArrayOutputStream(); src.compress(Bitmap.CompressFormat.PNG, 80, stream); byte[] byteArray stream.toByteArray(); return BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length); } }5. 合同加密处理 (crypto.js)import CryptoJS from crypto-js const APP_SECRET your_app_secret export const encryptSignData (data) { const timestamp Date.now() const signStr ${data.contractId}|${timestamp}|${APP_SECRET} return { ...data, timestamp, sign: CryptoJS.SHA256(signStr).toString() } }功能扩展建议生物识别集成uni.checkIsSupportSoterAuthentication({ success(res) { if (res.supportMode.includes(fingerPrint)) { uni.startSoterAuthentication({ requestAuthModes: [fingerPrint], challenge: sign_ Date.now(), authContent: 请验证指纹签署合同 }) } } })签署记录存储const db uniCloud.database() export const saveSignRecord (record) { return db.collection(sign_records).add({ contractId: record.contractId, signTime: new Date(), signImage: record.signImage, userId: uni.getStorageSync(userId) }) }合同模板处理export const generateContract (templateId, variables) { return uni.request({ url: ${BASE_URL}/contract/generate, method: POST, data: { templateId, variables } }) }注意事项签名图片建议转换为Base64传输关键接口需使用HTTPS并实现参数签名原生模块需处理不同屏幕密度适配正式环境需要申请合规的电子签名证书合同原文哈希值应上链存证用户身份认证流程合同模板管理系统签署状态同步机制法律要求的存证接口多平台UI适配方案