一、案例　　

　　1.1　　配置application.properties

#主配置文件，配置了這個會優先讀取里面的屬性覆蓋主配置文件的屬性
spring.profiles.active=dev
server.port=8888
    
logging.config=classpath:log4j2-dev.xml
spring.mvc.view.prefix: /WEB-INF/templates/
spring.mvc.view.suffix: .jsp

spring.http.multipart.enabled=true #默認支持文件上傳.
spring.http.multipart.file-size-threshold=0 #支持文件寫入磁盤.
spring.http.multipart.location= # 上傳文件的臨時目錄
spring.http.multipart.max-file-size=1Mb # 最大支持文件大小
spring.http.multipart.max-request-size=10Mb # 最大支持請求大小

　　1.2　　編寫IndexController

該控制器只用於處理 “/” 和“/index”請求，使之跳轉到index.jsp頁面

package com.shyroke.controller;

import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping(value = "/")
public class IndexController {

    @RequestMapping(value="index")
    public String index() {
        return "index";
    }
    
    @RequestMapping()
    public String index2() {
        return "index";
    }
}

　　1.3　　編寫index.jsp

<body>
    <form method="POST" enctype="multipart/form-data" action="/file/upload"> 
           文件：<input type="file" name="file" />
       <input type="submit" value="上傳" />
       </form>
</body>

　　1.4　　編寫FileController

package com.shyroke.controller;

import java.io.File;
import java.io.IOException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

@Controller
@RequestMapping(value = "/file")
public class FileController {

    private static final Logger logger = LoggerFactory.getLogger(FileController.class);

    @RequestMapping(value = "upload")
    @ResponseBody
    public String upload(@RequestParam("file") MultipartFile file) {
        if (file.isEmpty()) {
            return "文件為空";
        }

        // 獲取文件名
        String fileName = file.getOriginalFilename();
        logger.info("上傳的文件名為：" + fileName);

        // 獲取文件的后綴名
        String suffixName = fileName.substring(fileName.lastIndexOf("."));
        logger.info("上傳的后綴名為：" + suffixName);

        // 文件上傳路徑
        String filePath = "E://";

        // 解決中文問題，liunx下中文路徑，圖片顯示問題
        // fileName = UUID.randomUUID() + suffixName;
        
        File dest = new File(filePath + fileName);

        // 檢測是否存在目錄
        if (!dest.getParentFile().exists()) {
            dest.getParentFile().mkdirs();
        }

        try {
            file.transferTo(dest);
            return "上傳成功";
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "上傳失敗";
    }

}