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前端调用代码 [代码]selectImg: [代码][代码]function[代码][代码](e){[代码][代码]   [代码][代码]var[代码] [代码]that=[代码][代码]this[代码][代码]   [代码][代码]wx.chooseImage({[代码][代码]     [代码][代码]count: 3,[代码][代码]     [代码][代码]sizeType: [[代码][代码]'original'[代码][代码], [代码][代码]'compressed'[代码][代码]],[代码][代码]     [代码][代码]sourceType: [[代码][代码]'album'[代码][代码], [代码][代码]'camera'[代码][代码]],[代码][代码]     [代码][代码]success(res) {[代码][代码]       [代码][代码]const tempFilePaths = res.tempFilePaths[代码][代码]       [代码][代码]console.log(tempFilePaths)[代码][代码]       [代码][代码]that.setData({[代码][代码]         [代码][代码]imgUrl: tempFilePaths[代码][代码]       [代码][代码]})[代码][代码]       [代码][代码]wx.uploadFile({[代码][代码]         [代码][代码]url: app.serverUrl+[代码][代码]"/upload/XZImg?openid="[代码][代码]+app.openID, [代码][代码]//仅为示例，非真实的接口地址[代码][代码]         [代码][代码]filePath: tempFilePaths[0],[代码][代码]         [代码][代码]name: [代码][代码]'files'[代码][代码],[代码][代码]         [代码][代码]success(res) {[代码][代码]           [代码][代码]const data = res.data[代码][代码]           [代码][代码]//do something[代码][代码]           [代码][代码]console.log(data)[代码][代码]         [代码][代码]},[代码][代码]       [代码][代码]})[代码][代码]     [代码] [代码]     [代码][代码]}[代码][代码]   [代码][代码]})[代码]后端代码 [代码]@RestController[代码][代码]@RequestMapping[代码][代码]([代码][代码]"/upload"[代码][代码])[代码][代码]public[代码] [代码]class[代码] [代码]uploadImage {[代码] [代码]    [代码][代码]@PostMapping[代码][代码]([代码][代码]"/XZImg"[代码][代码])[代码][代码]    [代码][代码]public[代码] [代码]void[代码] [代码]uploadFace(String openid, [代码][代码]@RequestParam[代码][代码]([代码][代码]"files"[代码][代码]) MultipartFile[] files ) [代码][代码]throws[代码] [代码]Exception {[代码][代码]        [代码][代码]System.out.println(openid);[代码] [代码]        [代码][代码]if[代码] [代码](StringUtils.isNotBlank(openid)) {[代码][代码]            [代码][代码]// 文件保存的命名空间[代码][代码]            [代码][代码]String fileSpace = [代码][代码]"C:/Users/Administrator/ssm_images"[代码][代码];[代码][代码]            [代码][代码]// 保存到数据库中的相对路径[代码][代码]            [代码][代码]String uploadPathDB = [代码][代码]"/"[代码] [代码]+ openid;[代码][代码]            [代码][代码]System.out.println(uploadPathDB);[代码][代码]            [代码][代码]FileOutputStream fileOutputStream = [代码][代码]null[代码][代码];[代码][代码]            [代码][代码]InputStream inputStream = [代码][代码]null[代码][代码];[代码][代码]            [代码][代码]try[代码] [代码]{[代码][代码]                [代码][代码]if[代码] [代码](files != [代码][代码]null[代码] [代码]&&files.length>[代码][代码]0[代码][代码]) {[代码][代码]                    [代码][代码]System.out.println(files);[代码][代码]                    [代码][代码]String fileName = files[[代码][代码]0[代码][代码]].getOriginalFilename();[代码][代码]                    [代码][代码]if[代码] [代码](StringUtils.isNotBlank(fileName)) {[代码][代码]                        [代码][代码]// 文件上传的最终保存路径[代码][代码]                        [代码][代码]String finalFacePath = fileSpace + uploadPathDB + [代码][代码]"/"[代码] [代码]+ fileName;[代码][代码]                        [代码][代码]// 设置数据库保存的路径[代码][代码]                        [代码][代码]uploadPathDB += ([代码][代码]"/"[代码] [代码]+ fileName);[代码] [代码]                        [代码][代码]File outFile = [代码][代码]new[代码] [代码]File(finalFacePath);[代码][代码]                        [代码][代码]if[代码] [代码](outFile.getParentFile() != [代码][代码]null[代码] [代码]|| !outFile.getParentFile().isDirectory()) {[代码][代码]                            [代码][代码]// 创建父文件夹[代码][代码]                            [代码][代码]outFile.getParentFile().mkdirs();[代码][代码]                        [代码][代码]}[代码] [代码]                        [代码][代码]fileOutputStream = [代码][代码]new[代码] [代码]FileOutputStream(outFile);[代码][代码]                        [代码][代码]inputStream = files[[代码][代码]0[代码][代码]].getInputStream();[代码][代码]                        [代码][代码]IOUtils.copy(inputStream, fileOutputStream);[代码][代码]                    [代码][代码]}[代码] [代码]                [代码][代码]}[代码][代码]            [代码][代码]} [代码][代码]catch[代码] [代码](Exception e) {[代码][代码]                [代码][代码]e.printStackTrace();[代码][代码]            [代码][代码]} [代码][代码]finally[代码] [代码]{[代码][代码]                [代码][代码]if[代码] [代码](fileOutputStream != [代码][代码]null[代码][代码]) {[代码][代码]                    [代码][代码]fileOutputStream.flush();[代码][代码]                    [代码][代码]fileOutputStream.close();[代码][代码]                [代码][代码]}[代码][代码]            [代码][代码]}[代码][代码]        [代码][代码]}[代码] [代码]    [代码][代码]}[代码][代码]}[代码]一直进不去啊，用HttpServltRequest看请求体参数files是null。是哪里出问题了呢？好像文件根本就没传过去，都是null