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Home WeChat Applet Mini Program Development Analysis of practical cases of uploading pictures in WeChat applet

Analysis of practical cases of uploading pictures in WeChat applet

May 31, 2018 pm 02:11 PM
Actual combat Applets Case

This time I will bring you an analysis of a practical case of uploading images to WeChat mini programs. What are the precautions for practical cases of uploading images to WeChat mini programs? The following is a practical case, let’s take a look.

I have seen a lot of examples on the Internet of small programs uploading images and java back-end reception, but no matter which website I read, the code is basically the same, and there is a lot of code.

So I just wrote a simpler one myself.

One small terminal

user.wxml

<view class=&#39;user_head&#39;>?
?<view>?
??<image src=&#39;{{ptuser.avatarUrl}}&#39; bindtap=&#39;updateHead&#39;></image>?
?</view>?
?<text>點(diǎn)擊選擇頭像</text>?
</view>

user.js

//?更換頭像?
span?style="font-size:18px;color:#FF0000;">?updateHead:?function?()?{?
??var?that?=?this?
??//?上傳圖片?獲取路徑?
??wx.chooseImage({?
???success:?function?(res)?{?
????console.log('臨時路徑:'?+?res.tempFilePaths[0])?
??????wx.uploadFile({?
???????url:?app.globalData.baseUrl?+?'/file/uploadFile',?
???????filePath:?res.tempFilePaths[0],?
???????name:?'file',?
???????success:?function?(result)?{?
????????console.log("返回路徑:"?+?result.data)?
???????}?
??????})?
???},?
??})?
?},

Two java terminal

package?cn.helloxhs.moudle.common;?
?
import?java.io.File;?
import?java.io.FileInputStream;?
import?java.io.FileNotFoundException;?
import?java.io.FileOutputStream;?
import?java.io.IOException;?
import?java.io.InputStream;?
import?java.io.OutputStream;?
?
import?javax.servlet.http.HttpServletRequest;?
import?javax.servlet.http.HttpServletResponse;?
?
import?org.apache.commons.fileupload.disk.DiskFileItem;?
import?org.springframework.stereotype.Controller;?
import?org.springframework.web.bind.annotation.RequestMapping;?
import?org.springframework.web.bind.annotation.ResponseBody;?
import?org.springframework.web.multipart.MultipartFile;?
import?org.springframework.web.multipart.commons.CommonsMultipartFile;?
?
import?cn.helloxhs.base.controller.BaseController;?
?
/**?
?*?類說明?
?*?
?*?@author?肖荷山?
?*?@version?創(chuàng)建時間:2017年12月23日?上午11:14:27?
?*/?
@Controller?
@RequestMapping("/file")?
public?class?FileController?extends?BaseController?{?
??@RequestMapping("/uploadFile")?
??@ResponseBody?
??public?Object?uploadFile(HttpServletResponse?response,?HttpServletRequest?request,?MultipartFile?file)?{?
????String?realPath?=?request.getSession().getServletContext().getRealPath("/temp");?
????try?{?
??????CommonsMultipartFile?cf?=?(CommonsMultipartFile)?file;?
??????DiskFileItem?fi?=?(DiskFileItem)?cf.getFileItem();?
??????File?f1?=?fi.getStoreLocation();?
??????InputStream?ips?=?new?FileInputStream(f1);?
??????OutputStream?ops?=?new?FileOutputStream(realPath?+?"/"?+?"xhs.jpg");?
??????byte[]?b?=?new?byte[1024];?
??????int?len;?
??????try?{?
????????while?((len?=?ips.read(b))?!=?-1)?{?
??????????ops.write(b,?0,?len);?
????????}?
??????}?catch?(IOException?e)?{?
????????e.printStackTrace();?
??????}?finally?{?
????????//?完畢,關(guān)閉所有鏈接?
????????try?{?
??????????ops.close();?
??????????ips.close();?
????????}?catch?(IOException?e)?{?
??????????e.printStackTrace();?
????????}?
??????}?
?
????}?catch?(FileNotFoundException?e)?{?
??????e.printStackTrace();?
????}?
????return?realPath;?
??}?
?
}

The picture is stored in the temp directory of the project

It’s simple, it has no other functions, just upload pictures.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

How to use WeChat applet to upload pictures

How to operate JS to generate random numbers and Random sequence

The above is the detailed content of Analysis of practical cases of uploading pictures in WeChat applet. For more information, please follow other related articles on the PHP Chinese website!

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