使用springmvc 和nginx 搭建一个文件上传下载服务器

spring mvc 文件上传搭建

上传 控制器代码：

@Controller
public class FileController implements BindingResultMessage{

    @Autowired
    private FileShareService fileShareService;
    private FileSaveCategory fileSaveCategory = new DateAppendSaveCategory();

    @RequestMapping(value = "/upload", method = RequestMethod.POST)
    @ResponseBody
    public Map upload(HttpServletRequest req) throws IOException {
        Map retMap = Maps.newHashMap();
        retMap.put("statusCode",StatusCode.SUCCESS);
        Map result = Maps.newHashMap();
        CommonsMultipartResolver resolver = new CommonsMultipartResolver(
                req.getServletContext());
        if (resolver.isMultipart(req)) {
            MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) req;
            // 取得request中的所有文件名
            Iterator iter = multiRequest.getFileNames();
            FileShare record = null;
            String path = null;
            List list = Lists.newArrayList();
            String prefix = "";
            if(fileSaveCategory != null){
                prefix = fileSaveCategory.prefixPath();
            }
            while (iter.hasNext()) {
                String fileName = iter.next();
                // 取得上传文件
                List mfs = multiRequest.getFiles(fileName);
                for(MultipartFile file:mfs){
                    String originalFilename = file.getOriginalFilename();
                    path = com.yaochfua.jframework.fileshare.core.Files.save(file,prefix);
                    //入库
                    record = new FileShare();
                    record.setName(originalFilename);
                    record.setPath(GlobalVar.fileDownloadServer+path);
                    fileShareService.insert(record);
                    list.add(record);
                }
            }
            result.put("data",list);
            retMap.put("result",result);
        }
        return retMap;
    }


}

 说明：

       1）上传的文件保存到一个固定文件夹，然后通过nginx配置一个静态资源下载服务器。

       2）接口直接返回文件的下载路径。

nginx下载服务配置

nginx.conf 关键配置（标红部分）

server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            root   html;
            index  index.html index.htm;
        }
       
        location /fileShare {
            alias /data/fileRootDir/;
        }
 
    
 
    
 说明 ：将/data/fileRootDir 当作一个下载资源根路径 所有上传的文件放在改路径或者子路径下。 
   

java后台调用上传文件接口

代码为：

public final class FileUploadUtil {

    public static JSONObject upload(String httpurl, String fileName, InputStream inputStream) {
        String result = "";
        try {

            String BOUNDARY = "---------7d4a6d158c9"; // 定义数据分隔线
            URL url = new URL(httpurl);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
            conn.setRequestProperty("Charsert", "UTF-8");
            conn.setRequestProperty("Content-Type",
                    "multipart/form-data; boundary=" + BOUNDARY);
            OutputStream out = new DataOutputStream(conn.getOutputStream());
            byte[] end_data = ("\r\n--" + BOUNDARY + "--\r\n").getBytes();// 定义最后数据分隔线
            StringBuilder sb = new StringBuilder();
            sb.append("--");
            sb.append(BOUNDARY);
            sb.append("\r\n");
            sb.append("Content-Disposition: form-data;name=\"file" + 1
                    + "\";filename=\"" + fileName + "\"\r\n");
            sb.append("Content-Type:application/octet-stream\r\n\r\n");
            byte[] data = sb.toString().getBytes();
            out.write(data);
            DataInputStream in = new DataInputStream(inputStream);
            int bytes = 0;
            byte[] bufferOut = new byte[1024];
            while ((bytes = in.read(bufferOut)) != -1) {
                out.write(bufferOut, 0, bytes);
            }
            out.write("\r\n".getBytes()); // 多个文件时，二个文件之间加入这个
            in.close();
            out.write(end_data);
            out.flush();
            out.close();
            // 定义BufferedReader输入流来读取URL的响应
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    conn.getInputStream()));
            String line = null;
            while ((line = reader.readLine()) != null) {
                result+=line;
            }
        } catch (Exception e) {
            System.out.println("发送POST请求出现异常！" + e);
        }
        return  JSONObject.parseObject(result);
    }

    public static void main(String[] args) throws Exception {
        String content ="hellow 中国";
        InputStream ips = new ByteArrayInputStream(content.getBytes("UTF-8"));
        System.out.println(upload("http://192.168.9.21:8082/fileShare/upload","text.txt",ips));

    }
}

PS:

 1）linux nginx安装注意去官网下载源代码编译安装，不要利用yum install （熟悉的人倒也无所谓），运维同事建议我源码编译安装。

 2）上传接口：

http://192.168.9.21:8082/fileShare/upload

返回数据

{
result: {
data: [
{
name: "",
path: "http://192.168.9.21/fileShare/2016/0720/7269220160720"
},
{
name: "搜索绘图.xls",
path: "http://192.168.9.21/fileShare/2016/0720/9558420160720.xls"
}
]
},
statusCode: 0
}