springboot和fastdfs实现文件ajax上传

1.下载：
<dependency>
            <groupId>com.github.tobato</groupId>
            <artifactId>fastdfs-client</artifactId>
            <version>1.25.4-RELEASE</version>
        </dependency>

2.添加配置文件在application.properties中添加：

#读取inputsream阻塞时间
fdfs.so-timeout=3500
fdfs.connect-timeout=6000
#设置缩略图尺寸
fdfs.thumbImage.width=150
fdfs.thumbImage.height=150
#tracker地址
fdfs.trackerList[0]=192.168.6.24:22122
#fdfs.trackerList[1]=192.168.0.202:22122
#通过nginx 访问地址
fdfs.webServerUrl=http://192.168.6.24:8977/
#获取连接池最大数量
fdfs.pool.max-total=200


引入配置：

@ComponentScan(value={"com.github.tobato.fastdfs.service"})
@Configuration
@Import(FdfsClientConfig.class)
// 解决jmx重复注册bean的问题
@EnableMBeanExport(registration = RegistrationPolicy.IGNORE_EXISTING)
public class FastDfsConfig {
}


3.后台代码实现：

package com.tms.bean.system.client;

import com.github.tobato.fastdfs.conn.FdfsWebServer;
import com.github.tobato.fastdfs.domain.StorePath;
import com.github.tobato.fastdfs.exception.FdfsUnsupportStorePathException;
import com.github.tobato.fastdfs.service.FastFileStorageClient;
import org.apache.commons.io.FilenameUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;

import java.io.*;
import java.nio.charset.Charset;

/**
* fastclent
* Created by gjp on 2017/9/19.
*/
@Component
public class FastDFSClient {
    private final Logger logger = LoggerFactory.getLogger(FastDFSClient.class);

    @Autowired
    private FastFileStorageClient storageClient;

    @Autowired
    private FdfsWebServer fdfsWebServer;

    /**
     * 上传文件
     * @param file 文件对象
     * @return 文件访问地址
     * @throws IOException
     */
    public String uploadFile(MultipartFile file) throws IOException {
        StorePath storePath = storageClient.uploadFile(file.getInputStream(),file.getSize(), FilenameUtils.getExtension(file.getOriginalFilename()),null);
        return getResAccessUrl(storePath);
    }


    /**
     * 上传文件
     * @param file 文件对象
     * @return 文件访问地址
     * @throws IOException
     */
    public String uploadFileStream(InputStream is,long size,String fileName) throws IOException {
        StorePath storePath = storageClient.uploadFile(is,size, FilenameUtils.getExtension(fileName),null);
        return getResAccessUrl(storePath);
    }

    /**
     * 上传文件
     * @param file 文件对象
     * @return 文件访问地址
     * @throws IOException
     */
    public String uploadFile(File file) throws IOException {
        FileInputStream inputStream = new FileInputStream (file);
        StorePath storePath = storageClient.uploadFile(inputStream,file.length(), FilenameUtils.getExtension(file.getName()),null);
        return getResAccessUrl(storePath);
    }

    /**
     * 将一段字符串生成一个文件上传
     * @param content 文件内容
     * @param fileExtension
     * @return
     */
    public String uploadFile(String content, String fileExtension) {
        byte[] buff = content.getBytes(Charset.forName("UTF-8"));
        ByteArrayInputStream stream = new ByteArrayInputStream(buff);
        StorePath storePath = storageClient.uploadFile(stream,buff.length, fileExtension,null);
        return getResAccessUrl(storePath);
    }

    // 封装图片完整URL地址
    private String getResAccessUrl(StorePath storePath) {
        String fileUrl = fdfsWebServer.getWebServerUrl() + storePath.getFullPath();
        return fileUrl;
    }

    /**
     * 删除文件
     * @param fileUrl 文件访问地址
     * @return
     */
    public void deleteFile(String fileUrl) {
        if (StringUtils.isEmpty(fileUrl)) {
            return;
        }
        try {
            StorePath storePath = StorePath.praseFromUrl(fileUrl);
            storageClient.deleteFile(storePath.getGroup(), storePath.getPath());
        } catch (FdfsUnsupportStorePathException e) {
            logger.warn(e.getMessage());
        }
    }


/**
     *  图片缩略图
     * @param is
     * @param size
     * @param fileExtName
     * @param metaData
     * @return 文件访问地址
     返回地址为：http://192.168.6.24:8977/group1/M00/00/00/wKgGGFnDGS-AVhrAAAMhasozgRc678.jpg
    访问缩略图地址为：http://192.168.6.24:8977/group1/M00/00/00/wKgGGFnDGS-AVhrAAAMhasozgRc678_150x150.jpg
     */
        public String upfileImage(InputStream is,long size,String fileExtName,Set<MateData> metaData){
          StorePath path = storageClient.uploadImageAndCrtThumbImage(is,size,fileExtName,metaData);

            return getResAccessUrl(path);
    }




}


4.controller 实现：
package com.tms.controller.system;

import com.tms.bean.system.client.FastDFSClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartHttpServletRequest;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;

/**
* 文件上传
* Created by gjp on 2017/9/19.
*/
@Controller
@RequestMapping("/file")
public class FileUpController {

    private static final Logger fLog = LoggerFactory.getLogger(FileUpController.class);
    @Resource
    private FastDFSClient fastDFSClient;

    /**
     *
     * @param multipartFile
     * @return
     */
    @ResponseBody
    @RequestMapping(value = "/up",method = RequestMethod.POST)
    public Map<String,String> fileUp(MultipartHttpServletRequest multipartFile, HttpServletRequest request){

        Map<String,String> result = new HashMap<String,String>();
        String param = request.getParameter("param");//参数名称
        if(StringUtils.isEmpty(param)){
            result.put("result","false");
            result.put("msg","请添加参数");
        }
        InputStream is = null;

        String fileName = multipartFile.getFile(param).getOriginalFilename();
        try {
            long size = multipartFile.getFile(param).getSize();
            is = multipartFile.getFile(param).getInputStream();
            String path = fastDFSClient.uploadFileStream(is,size,fileName);
            result.put("result","true");
            //图片地址
            result.put("srckey",path);
        }catch (IOException e){
            result.put("result","false");
            fLog.error("file:"+fileName,e.fillInStackTrace());
        }finally {
            if (is !=null){
                try {
                    is.close();
                }catch (IOException io){
                    fLog.error(io.getMessage());
                }
            }
        }

        return result;
    }

}



5.前台页面实现：

<li>
<span class="reg_label2 rt50 relativeBox"><span class="red_font">*</span>营业执照：</span>
<span class="upload_span relativeBox">
<input type="file" id="id_license" class="input_file absoluteBox notnull" name="license" />
<img src=""  id="id_license_img"  />
<input type="hidden"  id="id_license_value" name="licenseName"  />
</span>
</li>




$("#id_license").on("change", function(){
                $.ajaxFileUpload({
                        url: '/file/up', //用于文件上传的服务器端请求地址
                        secureuri: false, //是否需要安全协议，一般设置为false
                        fileElementId: 'id_license', //文件上传域的ID
                        dataType: 'json', //返回值类型 一般设置为json
data:{param:'license'},//file 标签的名称
                        type:'post',
                        success: function (data, status)  //服务器成功响应处理函数
                        {
                          if(data.result == "true"){
                              alert("上传成功！");
                              $("#id_license_value").val(data.srckey);

                              var $file = $(this);
                              var fileObj = $file[0];
                              var windowURL = window.URL || window.webkitURL;
                              var dataURL;
                              var $img = $("#id_license_img");

                              if (fileObj && fileObj.files && fileObj.files[0]) {
                                  dataURL = windowURL.createObjectURL(fileObj.files[0]);
                                  $img.attr('src', dataURL);
                              } else {
                                  dataURL = $file.val();
                                  var imgObj = document.getElementById("preview");
                                  imgObj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
                                  imgObj.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = dataURL;
                              }

  }else {
                              alert("上传失败！");
  }
                        },error: function (data, status, e)//服务器响应失败处理函数
                        {
                            alert(e);
                        }
                    })

            });

引入js

<script src="../../static/js/ajaxfileupload.js" th:src="@{/js/ajaxfileupload.js}"></script>

<script src="../../static/js/jquery-1.8.3.min.js" th:src="@{/js/jquery-1.8.3.min.js}"></script>


查看效果：
原图：




缩略图：