微信小程序之上传图片(含前后端代码例子)

<view class='content'>
<view class='img-box'>
<view class='img-list'>
<block wx:for="{{detailPics}}" wx:key="index">
<view class='img-item'>
<image src='{{item}}' bindlongpress="bindlongpressimg" data-id='{{index}}'></image>
</view>
</block>
<view class='chooseimg' bindtap='uploadDetailImage'>
<view class="weui-uploader__input-box"></view>
</view>
</view>
<view class='tips'>长按对应的图片即可删除</view>
</view>
</view>

.content {
width: %;
background-color: #fff;
}.img-list {
display: flex;
display: -webkit-flex;
flex-direction: row;
justify-content: flex-start;
align-items: center;
flex-wrap: wrap;
}.img-item {
width: %;
text-align: left;
margin-right: 20rpx;
margin-bottom: 10rpx;
}.img-item image {
width: 180rpx;
height: 180rpx;
}.submit-btn {
width: %;
background-color: #fff;
height: 80rpx;
text-align: center;
line-height: 80rpx;
font-size: 30rpx;
position: fixed;
bottom: 100rpx;
}.chooseimg {
background-color: #fff;
}.weui-uploader__input-box {
float: left;
position: relative;
margin-right: 9px;
margin-bottom: 9px;
width: 180rpx;
height: 180rpx;
border: 1px solid #d9d9d9;
}.weui-uploader__input-box:before {
width: 2px;
height: .5px;
}.weui-uploader__input-box:after, .weui-uploader__input-box:before {
content: " ";
position: absolute;
top: %;
left: %;
-webkit-transform: translate(-%, -%);
transform: translate(-%, -%);
background-color: #d9d9d9;
}.weui-uploader__input-box:after {
width: .5px;
height: 2px;
}.weui-uploader__input-box:after, .weui-uploader__input-box:before {
content: " ";
position: absolute;
top: %;
left: %;
-webkit-transform: translate(-%, -%);
transform: translate(-%, -%);
background-color: #d9d9d9;
}.tips {
color: #;
font-size: 24rpx;
padding-bottom: 20rpx;
}.img-box {
width: %;
margin: auto;
padding-top: 20rpx;
}

// component/uploadImages/index.js
Component({
/**
* 组件的属性列表
*/
properties: {
count: { //最多选择图片的张数，默认9张
type: Number,
value:
},
uploadUrl: { //图片上传的服务器路径
type: String,
value: ''
},
showUrl: { //图片的拼接路径
type: String,
value: ''
}
}, /**
* 组件的初始数据
*/
data: {
detailPics: [], //上传的结果图片集合
}, ready: function () {
console.log(this.data)
}, /**
* 组件的方法列表
*/
methods: { uploadDetailImage: function (e) { //这里是选取图片的方法
var that = this;
var pics = [];
var detailPics = that.data.detailPics;
if (detailPics.length >= that.data.count) {
wx.showToast({
title: '最多选择' + that.data.count + '张！',
})
return;
}
wx.chooseImage({
count: that.data.count, // 最多可以选择的图片张数，默认9
sizeType: ['original', 'compressed'], // original 原图，compressed 压缩图，默认二者都有
sourceType: ['album', 'camera'], // album 从相册选图，camera 使用相机，默认二者都有
success: function (res) {
var imgs = res.tempFilePaths;
for (var i = ; i < imgs.length; i++) {
pics.push(imgs[i])
}
that.uploadimg({
url: "http://www.test.com//test-api/wechat/applet/api/uploadUserAvatar", //这里是你图片上传的接口
path: pics, //这里是选取的图片的地址数组
});
},
}) },
//多张图片上传
uploadimg: function (data) {
wx.showLoading({
title: '上传中...',
mask: true,
})
var that = this,
i = data.i ? data.i : ,
success = data.success ? data.success : ,
fail = data.fail ? data.fail : ;
wx.uploadFile({
url: data.url,
filePath: data.path[i],
name: 'file',
formData: {"userId":""},
success: (resp) => {
wx.hideLoading();
success++;
var str = resp.data //返回的结果，可能不同项目结果不一样 console.log(str);
// var pic = JSON.parse(str);
// var pic_name = that.data.showUrl + pic.Data;
// var detailPics = that.data.detailPics;
// detailPics.push(pic_name)
// that.setData({
// detailPics: detailPics
// })
},
fail: (res) => {
fail++;
console.log('fail:' + i + "fail:" + fail);
},
complete: () => {
i++;
if (i == data.path.length) { //当图片传完时，停止调用
console.log('执行完毕');
console.log('成功：' + success + " 失败：" + fail);
var myEventDetail = {
picsList: that.data.detailPics
} // detail对象，提供给事件监听函数
var myEventOption = {} // 触发事件的选项
that.triggerEvent('myevent', myEventDetail, myEventOption)//结果返回调用的页面
} else { //若图片还没有传完，则继续调用函数
data.i = i;
data.success = success;
data.fail = fail;
that.uploadimg(data);//递归，回调自己
}
}
});
}, }
})

@PostMapping("/uploadUserAvatar")
@ApiOperation(value = "上传用户头像", notes = "上传用户头像")
public JSONObject uploadUserAvatar(HttpServletRequest request) { JSONObject json = new JSONObject();
try { String userId = request.getParameter("userId"); COSClientUtil cosClientUtil = new COSClientUtil(); MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request; // 获取上传的文件
MultipartFile multiFile = multipartRequest.getFile("file"); String name = cosClientUtil.uploadFileCos(multiFile); // 获取文件路径
String fileUrl = cosClientUtil.getFileUrl(name); Console.log("fileUrl:"+fileUrl); // 对文件路径进行处理
String dbFileUrl = fileUrl.substring(, fileUrl.indexOf("?")); Console.log("dbFileUrl:"+dbFileUrl); User user = new User();
user.setId(Integer.parseInt(userId));
user.setSmallAvatar(dbFileUrl); boolean isUploadUserAvatar = userService.updateById(user); if (isUploadUserAvatar) {
json.put(ResponseUtils.CODE, ResponseUtils.SUCCESS_CODE);
json.put(ResponseUtils.MSG, ResponseUtils.SUCCEESS_MSG);
} else {
json.put(ResponseUtils.CODE, ResponseUtils.ERROR_CODE);
json.put(ResponseUtils.MSG, ResponseUtils.ERROR_MSG);
} } catch (Exception e) {
e.printStackTrace(); json.put(ResponseUtils.CODE, ResponseUtils.ERROR_CODE);
json.put(ResponseUtils.MSG, ResponseUtils.ERROR_MSG); } return json;
}