<view class='user_head'> 
 <view> 
  <image src='{{ptuser.avatarUrl}}' bindtap='updateHead'></image> 
 </view> 
 <text>点击选择头像</text> 
</view>

// 更换头像 
span style="font-size:18px;color:#FF0000;"> updateHead: function () { 
  var that = this 
  // 上传图片 获取路径 
  wx.chooseImage({ 
   success: function (res) { 
    console.log('临时路径：' + res.tempFilePaths[0]) 
      wx.uploadFile({ 
       url: app.globalData.baseUrl + '/file/uploadFile', 
       filePath: res.tempFilePaths[0], 
       name: 'file', 
       success: function (result) { 
        console.log("返回路径：" + result.data) 
       } 
      }) 
   }, 
  }) 
 },

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; 
 
/** 
 * 类说明 
 * 
 * @author 肖荷山 
 * @version 创建时间：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 { 
        // 完毕，关闭所有链接 
        try { 
          ops.close(); 
          ips.close(); 
        } catch (IOException e) { 
          e.printStackTrace(); 
        } 
      } 
 
    } catch (FileNotFoundException e) { 
      e.printStackTrace(); 
    } 
    return realPath; 
  } 
 
}