Bootstrap-fileinput插件使用教程 支持多文件上传

*1.bootstrap-fileinput 插件git下载地址

*

https://github.com/kartik-v/bootstrap-fileinput.git

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2.解决使用bootstrap-fileinput得到返回值

上传图片

        $("#file-0a").fileinput({
            uploadUrl : "/upload_img",//上传图片的url
            allowedFileExtensions : [ 'jpg', 'png', 'gif' ],
            overwriteInitial : false,
            maxFileSize : 1000,//上传文件最大的尺寸
            maxFilesNum : 1,//上传最大的文件数量
            initialCaption: "请上传商家logo",//文本框初始话value
//allowedFileTypes: ['image', 'video', 'flash'],
            slugCallback : function(filename) {
return filename.replace('(', '_').replace(']', '_');
            }
        });

注意上传图片事件完之后，得到返回值写法

        $('#file-0a').on('fileuploaded', function(event, data, previewId, index) {
var form = data.form, files = data.files, extra = data.extra,
              response = data.response, reader = data.reader;
              console.log(response);//打印出返回的json
              console.log(response.paths);//打印出路径
                });

jsp页面

<input id="file-0a" class="file" type="file" multiple
                        data-min-file-count="1" name="upload_logo">

其中data-min-file-count=”1”是指文件上传最低数量

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3.服务端代码

采用了spring自带插件上传，框架为Springmvc
Bean

import java.util.List;

public class Picture {

private List<String> paths;

public List<String> getPaths()
    {
return paths;
    }

public void setPaths(List<String> paths)
    {
this.paths = paths;
    }   
}

Controller

    @ResponseBody
    @RequestMapping(value="upload_img",method=RequestMethod.POST)
    public Picture uploadImage(@RequestParam MultipartFile[] upload_logo) throws IOException{

        log.info("上传图片");
        Picture pic = new Picture();
        List<String> paths = new ArrayList<String>();
        String dir = UploadUtil.getFolder();
        for(MultipartFile myfile : upload_logo){   
            if(myfile.isEmpty()){   
                log.info("文件未上传"); 
            }else{   
                log.info("文件长度: " + myfile.getSize()); 
                log.info("文件类型: " + myfile.getContentType()); 
                log.info("文件名称: " + myfile.getName()); 
                log.info("文件原名: " + myfile.getOriginalFilename()); 
                log.info("========================================");
                //上传文件 返回路径
                String path = UploadUtil.writeFile(myfile.getOriginalFilename(), dir, myfile.getInputStream());
                log.info("文件路径:"+path);
                paths.add(path);
            }   
        } 

        pic.setPaths(paths);
        return pic;
    }

uploadUtil

private static final Logger log = LoggerFactory.getLogger(UploadUtil.class);

private UploadUtil() {
    }

private static SimpleDateFormat fullSdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
private static SimpleDateFormat folder = new SimpleDateFormat(
"yyyy" + File.separator + "MM" + File.separator + "dd");

/**
 * 返回yyyy File.separator MM File.separator dd格式的字符串
 * 
 * @return
 */
public static String getFolder() {
return folder.format(new Date());
    }

/**
 * 文件上传
 * 
 * @param srcName
 * 原文件名
 * @param dirName
 * 目录名
 * @param input
 * 要保存的输入流
 * @return 返回要保存到数据库中的路径
 */
public static String writeFile(String srcName, String dirName, InputStream input) throws IOException {

        log.info(srcName);

// 取出上传的目录，此目录是tomcat的server.xml中配置的虚拟目录
        String uploadDir = ContextUtil.getSysProp("upload_dir");//设置你上传路径

// 取出虚拟目录的访问路径
        String virtualDir = ContextUtil.getSysProp("virtual_dir");//设置你虚拟目录访问路径

// 重命名文件
if (null != srcName) {
            srcName = srcName.substring(srcName.indexOf("."));

        } else {
            srcName = ".jpg";
        }
        String filename = "";
// 得到要上传的文件路径
        filename = uploadDir + File.separator + dirName + File.separator + fullSdf.format(new Date()) + srcName;

// 得到将要保存到数据中的路径
        String savePath = filename.replace(uploadDir, "");
        savePath = virtualDir + savePath.replace("\\", "/");

        File file = new File(filename);
if (!file.getParentFile().exists()) {
            file.getParentFile().mkdirs();
        }
        FileOutputStream fos = new FileOutputStream(file);
// 一次30kb
byte[] readBuff = new byte[1024 * 30];
int count = -1;
while ((count = input.read(readBuff, 0, readBuff.length)) != -1) {
            fos.write(readBuff, 0, count);
        }
        fos.flush();
        fos.close();
        input.close();
return savePath;
    }

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4.解决上传时候遇到的一些问题

如遇见点击上传之后，进度条显示为100%，jsp页面显示[Object,obejct]，那么注意你后台返回的是否为json对象。
如遇其他问题，可以留言，博主会尽快回复。

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