springboot上傳文件到本地服務器

上傳到本地服務器下，不需要修改配置文件

在本地開發測試模式時，得到的地址為： {項目跟目錄}/target/static/images/upload/

在打包成jar發布到服務器上時，得到的地址為： {發布jar包目錄}/static/images/upload/

package cn.jiashubing.controller;

import cn.jiashubing.common.StringConstants;
import cn.jiashubing.result.ResultModel;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.util.ResourceUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * @author jiashubing
 * @since 2019/6/25
 */
@RestController
@Api(tags = "稿件")
@RequestMapping(value = StringConstants.API)
public class ArticleController {

    @ApiOperation("上傳附件")
    @RequestMapping(value = "/uploadFile", method = RequestMethod.POST)
    public ResultModel<String> uploadFile(@RequestParam("file") @ApiParam(value = "二進制文件流") MultipartFile file) {
        String fileName = file.getOriginalFilename();//獲取文件名
        fileName = getFileName(fileName);
        String filepath = getUploadPath();
        if (!file.isEmpty()) {
            try (BufferedOutputStream out = new BufferedOutputStream(
                    new FileOutputStream(new File(filepath + File.separator + fileName)))) {
                out.write(file.getBytes());
                out.flush();
                return new ResultModel<>(fileName);
            } catch (FileNotFoundException e) {
                return new ResultModel<>(false, "上傳文件失敗 FileNotFoundException：" + e.getMessage());
            } catch (IOException e) {
                return new ResultModel<>(false, "上傳文件失敗 IOException：" + e.getMessage());
            }
        } else {
            return new ResultModel<>(false, "上傳文件失敗，文件為空");
        }
    }

    /**
     * 文件名后綴前添加一個時間戳
     */
    private String getFileName(String fileName) {
        int index = fileName.lastIndexOf(".");
        final SimpleDateFormat sDateFormate = new SimpleDateFormat("yyyymmddHHmmss");  //設置時間格式
        String nowTimeStr = sDateFormate.format(new Date()); // 當前時間
        fileName = fileName.substring(0, index) + "_" + nowTimeStr + fileName.substring(index);
        return fileName;
    }

    /**
     * 獲取當前系統路徑
     */
    private String getUploadPath() {
        File path = null;
        try {
            path = new File(ResourceUtils.getURL("classpath:").getPath());
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        if (!path.exists()) path = new File("");
        File upload = new File(path.getAbsolutePath(), "static/upload/");
        if (!upload.exists()) upload.mkdirs();
        return upload.getAbsolutePath();
    }
}