FastDFS---基础上手-蒲公英云

分享一下FastDFS的简单上手的demo,挺简单的.其中文件上传流程大致如下:

SouthEast

controller里的上传方法:

@RequestMapping("/fastdfs/upload")
    @ResponseBody
    public String uploadCreditorInfo(@RequestParam("id") Integer id, @RequestParam("fileName") MultipartFile file){
        int status = -1;
        //文件扩展名
        //originalFilename得到的文件名:aaa.txt
        String originalFilename = file.getOriginalFilename();
        String fileExtName = originalFilename.substring(originalFilename.indexOf(".")+1);
        try {
            //将文件转换为字节数组
            byte[] fileBatys  = file.getBytes();
            //调用service上传方法
            status =  creditorInfoService.uploadCreditorInfo(id,fileBatys,fileExtName);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return  "<script>window.parent.uploadOK("+status+")</script>";
    }

service里的上传方法:

public int uploadCreditorInfo(Integer id,byte[] fileBatys, String exName) {
        int retCode = 10000;
        String[] arry=null;
            //上传
            if ( exName != null && exName.length()>0) {
                arry = FastDFSClient.uploadFile(fileBatys,exName);
                //更新数据库信息
                String contracturl = "http://192.168.174.129/" + arry[0] + "/" + arry[1];
                CreditorInfo creditorInfo = new CreditorInfo();
                creditorInfo.setContracturl(contracturl);
                creditorInfo.setGroups(arry[0]);
                creditorInfo.setPath(arry[1]);
                creditorInfo.setId(id);
                retCode = creditorInfoMapper.updateByPrimaryKeySelective(creditorInfo);
            }
        return retCode;
    }

其中service中调用的fastdfs的uploadFile()方法如下:(这也是使用fastdfs的核心部分)

/**
     * 文件上传
     *
     * @param fileBytes
     * @param fileExtName
     * @return
     */
    public static String[] uploadFile (byte[] fileBytes, String fileExtName) {
        TrackerServer trackerServer = null;
        StorageServer storageServer = null;
        String[] array = null;
        try {
            //1.初始化fastdfs的连接信息配置
            ClientGlobal.init("fastdfs.properties");
            //2.创建一个Tracker的客户端对象
            TrackerClient trackerClient = new TrackerClient();
            //3.获得一个Tracker server对象
            trackerServer = trackerClient.getConnection();
            //4.获得一个Storage server对象
            storageServer = trackerClient.getStoreStorage(trackerServer);
            //5.创建一个Storage客户端对象
            StorageClient storageClient = new StorageClient(trackerServer, storageServer);
            //6.通过storageClient客户端对象，就可以去操作fastdfs文件系统了
            //文件上传
            array = storageClient.upload_file(fileBytes, fileExtName, null);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (MyException e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != trackerServer) {
                    trackerServer.close();
                }
                if (null != storageServer) {
                    storageServer.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return array;
    }

剩下的就是页面展示了,可以根据自己的习惯,使用ajax或者其他的前端技术,这里尝试了新的技术,没有使用ajax.具体代码如下:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>FastDFS---Demo</title>
    <link rel="stylesheet" href="${pageContext.request.contextPath}/css/bootstrap.min.css">
    <script src="${pageContext.request.contextPath}/js/jquery.min.js"></script>
    <script src="${pageContext.request.contextPath}/js/bootstrap.min.js"></script>
</head>
<body style="margin: 50px;">
<form action="${pageContext.request.contextPath}/fastdfs/upload" class="form-horizontal" role="form" method="post" enctype="multipart/form-data" target="uploadFrame">
    <div class="form-group">
        <label class="col-sm-2 control-label">借款人真实姓名</label>
        <div class="col-sm-10">
            <input type="text" class="form-control" id="realname" name="realname" value="${creditorInfo.realname}">
        </div>
    </div>
    <div class="form-group">
        <label class="col-sm-2 control-label">借款人手机号</label>
        <div class="col-sm-10">
            <input type="text" class="form-control" id="phone" name="phone" value="${creditorInfo.phone}">
        </div>
    </div>
    <div class="form-group">
        <label class="col-sm-2 control-label">借款人身份证</label>
        <div class="col-sm-10">
            <input type="text" class="form-control" id="idCard" name="idCard" value="${creditorInfo.idCard}">
        </div>
    </div>
    <div class="form-group">
        <label class="col-sm-2 control-label">借款人性别</label>
        <div class="col-sm-10">
            <input type="text" class="form-control" id="sex" name="sex" value="${creditorInfo.sex==1?"男":"女"}">
        </div>
    </div>
    <div class="form-group">
        <label class="col-sm-2 control-label">借款人地址</label>
        <div class="col-sm-10">
            <input type="text" class="form-control" id="address" name="address" value="${creditorInfo.address}">
        </div>
    </div>
    <div class="form-group">
        <label class="col-sm-2 control-label">上传合同</label>
        <div class="col-sm-10">
            <input type="file" class="form-control" id="fileName" name="fileName">
        </div>
    </div>
    <div class="form-group">
        <div class="col-sm-offset-2 col-sm-10">
            <input type="hidden" class="form-control" id="id" name="id" value="${creditorInfo.id}">
            <button type="submit" class="btn btn-default">提 交</button>
        </div>
    </div>
    <%--页面不刷新上传文件，借鉴一个iframe--%>
    <iframe id="uploadFrame" name="uploadFrame" style="display: none;"></iframe>
</form>
<%--上传后结果返回页面展示--%>
<script type="text/javascript">
    function uploadOK(status) {
        alert(status)
        if (status == 1) {
            //文件上传成功 layer弹层
            layer.confirm('文件上传成功，是否需要跳转到列表页?', function(index){
                //do something
                window.location.href="${pageContext.request.contextPath}/fastdfs/index"
                layer.close(index);
            });
        } else {
            //文件上传失败
            layer.alert("Sorry，文件上传失败了")
        }
    }
</script>
<script src="${pageContext.request.contextPath}/layer/layer.js"></script>
</body>
</body>
</html>

需要注意的是

<iframe id="uploadFrame" name="uploadFrame" style="display: none;"></iframe>

这段代码需要同表格一起提交,它与表格头部信息其实是一一对应的,就是表单头信息里的target=”uploadFrame”.如果编写时没有将下面这段代码加到表单里一起提交,那么页面是跳转不了的,.

<form action="${pageContext.request.contextPath}/fastdfs/upload" class="form-horizontal" role="form" method="post" enctype="multipart/form-data" target="uploadFrame">