图片上传--Jersey实现RESTful接口

上次利用SpringMVC实现图片上传，这个是客户端将图片和其他字段一起上传然后一起处理的。（有什么坏处暂时也没有想到）总之这次的希望能够将图片存储的服务独立出来，暂时用Jersey实现一个接口（老大说按道理应该用WebService来实现，但我在这里没觉得两者有什么不同呀=。=），然后在SpringMVC中将图片提交到Jersey接口，完成存储。

这个是独立出来的图片存储项目结构

config.xml配置文件中只添加了一个绝对路径和一个虚拟路径

<config>
<root>D:\\recommend\\images\\</root>
<uriRoot>/static/image/recommendation/</uriRoot></config>

springcontext.xml配置文件中将需要注入的东西配好即可

<context:component-scan base-package="com.xxx.upload">

RestFulApplication.java中注册必要的类

    public RestFulApplication(){
        register(RequestContextFilter.class);
        // Add additional features such as support for Multipart.
        register(MultiPartFeature.class);
        //load  Resource
        register(RecommendationPictureResource.class);
    }

RecommendationPictureResource.java

private final Log logger = LogFactory.getLog(RecommendationPictureResource.class);

@Autowired
@Qualifier("pictureService")
PictureService pictureService;//存储图片的服务类

@Autowired
@Qualifier("xmlUtils")
XMLUtils xmlUtils;//封装org.apache.commons.configuration.XMLConfiguration的一个xml文件解析工具类，用来读取config.xml配置文件

@POST
@Path("/upload")
@Produces("application/json;charset=UTF-8")
@Consumes(MediaType.MULTIPART_FORM_DATA)
public String loadPic(
        @FormDataParam("type") String type,
        @FormDataParam("resourceId") String resourceId,
        @FormDataParam("file") InputStream fileInputStream,
        @FormDataParam("file") FormDataContentDisposition contentDispositionHeader){
    ObjectNode result = new ObjectMapper().createObjectNode();
    if (type==null || resourceId == null || fileInputStream == null) {
        result.put("ret_code", 10001);
        result.put("ret_msg", "Illegal Parameters");
        return result.toString();
    }
    String fileName = contentDispositionHeader.getFileName();
    String path = type + File.separatorChar + resourceId + File.separatorChar + fileName;
    //存储路径
    String dstFilePath = xmlUtils.getString("root") + path; 
    pictureService.saveFile(fileInputStream, dstFilePath);
    logger.info("success save pic file, dstFilePath = " + dstFilePath);

    String uriPath = xmlUtils.getString("uriRoot") + path; 
    logger.info("uriPath = " + uriPath);
    result.put("uriPath", uriPath);
    return result.toString();
}

@POST
@Path("/delete")
@Produces("application/json;charset=UTF-8")
public void deletePic(@FormParam("uriPath") String uriPath){
    String uriRoot = xmlUtils.getString("uriRoot"); 
    String path = uriPath.substring(uriRoot.length());
    String dstFilePath = xmlUtils.getString("root") + path;
    pictureService.deleteFile(dstFilePath);
}

PictureService.java接口

    public void saveFile(InputStream fileInputStream, String dstFilePath);

    public void deleteFile(String dstFilePath);

PictureServiceImpl.java实现类

private final Log logger = LogFactory.getLog(PictureServiceImpl.class);


@Override
public void saveFile(InputStream fileInputStream, String dstFilePath) {
    OutputStream outputStream = null;
    try {
        File file = new File(dstFilePath);
        if(!file.exists()){
            if(!file.getParentFile().exists()){
                file.getParentFile().mkdirs();
            }
            outputStream = new FileOutputStream(new File(
                    dstFilePath));
            int read = 0;
            byte[] bytes = new byte[1024];

            outputStream = new FileOutputStream(new File(dstFilePath));
            while ((read = fileInputStream.read(bytes)) != -1) {
                outputStream.write(bytes, 0, read);
            }
        }else{
            logger.info("the pic already exist.");
        }
    } catch (IOException e) {
        logger.error(e);
        e.printStackTrace();
    }finally{
        try {
            fileInputStream.close();
            outputStream.flush();
            outputStream.close();
        } catch (IOException e) {
            logger.error("close stream defeat");
            e.printStackTrace();
        }
    }
}


@Override
public void deleteFile(String dstFilePath) {
    File file = new File(dstFilePath);
    file.delete();
    file.getParentFile().delete();
}

删除这儿还有问题，就是利用上述Jersey接口上传好的图片一直被JVM占用，导致无法删除，但我现在仍然看不破哪儿的资源没有释放~~

对应的SpringMVC中通过调用上述Jersey接口的部分代码

    try {
        String upload_host = "localhost:8080";
        String pic_upload_uri = "http://" + upload_host + "/xxx/upload";

        MultipartEntityBuilder entityBuilder = MultipartEntityBuilder.create();//org.apache.http.entity.mime.MultipartEntityBuilder
        //type和contentId在上述接口中用来生成存储路径
        entityBuilder.addTextBody("type", type);
        entityBuilder.addTextBody("resourceId", contentId);
        ContentType contentType = ContentType.parse(poster.getContentType());
        String fileName = poster.getOriginalFilename();
        entityBuilder.addBinaryBody("file", poster.getInputStream(), contentType, fileName);

        HttpClient client = new HttpClient();//自己封装好的Http工具类
        String loadResult  = client.post(pic_upload_uri, entityBuilder.build());//上传成功的话返回json格式字符串，其中包含一个uriPath
        //利用Jackson解析返回结果
        JsonNode node = new ObjectMapper().readTree(loadResult);
        uriPath = node.get("uriPath").asText();
        logger.info("load pic success! uriPath = " + uriPath);  
    } catch (Exception e) {
        logger.error("load pic error ! reason:" + e.getMessage());
    }

以上，实现图片上传服务，基本与业务无关，但调用的方式还是不太好，url路径不好配置，直接写在了代码中，还需要改。