SSM结合Ajax实现文件上传及分页

1.运行环境

myeclipse+mysql+jdk1.7

Sping、SpingMVC、Mybatis三大框架的必要jar包。

当然必要的还有文件上传的jar包

讲下小编最近在做的一个实训项目:MC音乐在线网站，因为本人主要负责后台的编写，而歌曲少不了文件的上传和下载，但是文件上传在我的分工中有，所以这里我就只写我写的文件上传。其实下载也差不多，后续可能补上!!

就我选中的两个包！！！！！！！！！！！！！！！！！！！！

2、我项目设计的图片的上传（主要分三部分）

2.1由于我的后台上传方法都写好了 主要就是怎么来调用了！！先看我的文件上传下载的服务实现接口！！

package cn.service.impl.admin;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.util.List;import java.util.UUID;import java.util.zip.ZipEntry;import java.util.zip.ZipOutputStream;import javax.servlet.http.HttpServletRequest;import org.apache.commons.io.FileUtils;import org.springframework.http.HttpHeaders;import org.springframework.http.HttpStatus;import org.springframework.http.MediaType;import org.springframework.http.ResponseEntity;import org.springframework.stereotype.Service;import org.springframework.web.multipart.MultipartFile;import cn.exception.FileUpSizeOverException;import cn.exception.FileUpUrlException;import cn.service.FileService;import cn.service.admin.AdminFileService;@Servicepublic class AdminFileServiceImpl implements AdminFileService{@Overridepublic String FileUp(MultipartFile file, String url,HttpServletRequest request)throws FileUpUrlException, FileUpSizeOverException {//请求的当前路径String path = request.getSession().getServletContext().getRealPath(url);  //文件名        String fileName =UUID.randomUUID().toString()+"."+file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".")+1);                File targetFile = new File(path, fileName);                  if(!targetFile.exists()){              targetFile.mkdirs();          }          try {file.transferTo(targetFile);} catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}          fileName = url+fileName;        return fileName;}@Overridepublic long FileUp(MultipartFile[] files, String url,HttpServletRequest request)throws FileUpUrlException, FileUpSizeOverException {long startTime = System.currentTimeMillis();String path = request.getSession().getServletContext().getRealPath(url);  for(MultipartFile file :files ){//文件名称 = uuid+后缀String fileName = UUID.randomUUID().toString()+"."+file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".")+1);;                  //System.out.println(path);          File targetFile = new File(path, fileName);          if(!targetFile.exists()){              targetFile.mkdirs();          }                  try {file.transferTo(targetFile);}catch (Exception e) {e.printStackTrace();}  }                long endTime = System.currentTimeMillis();return endTime-startTime;}@Overridepublic ResponseEntity<byte[]> FileDown(List<String> list,HttpServletRequest request) throws IOException {File file ;//最后下载路径String downloadFielName;if(list.size()>1){String uuid = UUID.randomUUID().toString();String tmpFileName = uuid+".zip"; //压缩文件临时名称  //压缩文件存储路径String strZipPath=request.getSession().getServletContext().getRealPath("/")+"/mc/"+tmpFileName; //创建压缩文件        File tmpZipFile = new File(strZipPath);          if (!tmpZipFile.exists())              tmpZipFile.createNewFile();          ZipOutputStream out = new ZipOutputStream(new FileOutputStream(strZipPath));        //文件组创建        File[] file1 =new File[list.size()] ;          for(int i=0;i<list.size();i++){          String fileUrl = request.getSession().getServletContext().getRealPath("/")+list.get(i);        //System.out.println(fileUrl);            file1[i]=new File(fileUrl);          }                  //存储容器        byte[] buffer = new byte[1024];         for (int i = 0; i < file1.length; i++) {                FileInputStream fis = new FileInputStream(file1[i]);                out.putNextEntry(new ZipEntry(UUID.randomUUID().toString()+file1[i].getName()));                //设置压缩文件内的字符编码，不然会变成乱码                //out.setEncoding("UTF-8");                int len;                // 读入需要下载的文件的内容，打包到zip文件                while ((len = fis.read(buffer)) > 0) {                    out.write(buffer, 0, len);                }                out.closeEntry();                fis.close();            }            out.close();          file = new File(request.getSession().getServletContext().getRealPath("/")+"/mc/"+tmpFileName);        //下载显示的文件名，解决中文名称乱码问题  downloadFielName = new String(tmpFileName.getBytes("UTF-8"),"iso-8859-1");}else{file = new File(request.getSession().getServletContext().getRealPath("/")+list.get(0));//下载显示的文件名，解决中文名称乱码问题  downloadFielName = new String(list.get(0).getBytes("UTF-8"),"iso-8859-1");}HttpHeaders headers = new HttpHeaders();  //通知浏览器以attachment（下载方式）打开图片headers.setContentDispositionFormData("attachment", downloadFielName); //application/octet-stream ： 二进制流数据（最常见的文件下载）。headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),headers, HttpStatus.CREATED);}@Overridepublic boolean deletUserImg(String url, HttpServletRequest request) throws FileUpUrlException{String path = request.getSession().getServletContext().getRealPath("");File file = new File(path,url);        if (file.exists()) {            file.delete();            return true;        }else{        throw new FileUpUrlException("路径错误");        }}}

2.2视图传递controller效果：（）

package cn.controller.admin;import java.util.List;import javax.servlet.http.HttpServletRequest;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import cn.exception.AdminException;import cn.exception.StateBlockException;import cn.pojo.PageBasePo;import cn.pojo.SongListPo;import cn.pojo.SongPo;import cn.pojo.vo.SongListVo;import cn.pojo.vo.SongVo;import cn.service.impl.admin.AdminSongListServiceImpl;import cn.service.impl.admin.AdminSongServiceImpl;@Controller@RequestMapping("/admin")public class AdminSongListController {@Autowiredprivate AdminSongListServiceImpl adminSongListServiceImpl;//查询所有的歌单Po@RequestMapping("/getAllSongList")public String getAllSongList(HttpServletRequest request,Model model,Integer pageIndex){String songListName=request.getParameter("search");SongListVo songListVo=new SongListVo();SongListPo songListPo=new SongListPo();if(songListName!=null){songListPo.setSonglistname(songListName);}songListVo.setSongListPo(songListPo);PageBasePo<SongListVo> pageBasePo=adminSongListServiceImpl.filter1(songListVo, 5, pageIndex);//System.out.println(pageBasePo);model.addAttribute("pageBasePo", pageBasePo);model.addAttribute("search",songListName);return "admin/songlist";}//删除@RequestMapping("/deleteSongListPo")public String  deleteSongListPo(int songListId){//System.out.println(songListId);try {adminSongListServiceImpl.deleteSongList(songListId);} catch (AdminException e) {// TODO Auto-generated catch blocke.printStackTrace();}return "forward:getAllSongList";}//修改@RequestMapping("/updateSongListPoReturn")public String  updateSongListPoReturn(HttpServletRequest request,SongListPo songListPo){System.out.println(songListPo);String url=request.getParameter("url");if(url!=null&&url!=""){songListPo.setImgurl(url);}try {adminSongListServiceImpl.updateSongList(songListPo);} catch (AdminException e) {// TODO Auto-generated catch blocke.printStackTrace();}return "forward:getAllSongList";}//分页@RequestMapping("/getPageSongList")@ResponseBodypublic PageBasePo<SongListVo> getPageSongList(String search,Integer pageIndex){SongListVo songListVo=new SongListVo();SongListPo songListPo=new SongListPo();if(search!=null){songListPo.setSonglistname(search);}songListVo.setSongListPo(songListPo);PageBasePo<SongListVo> pageBasePo=adminSongListServiceImpl.filter1(songListVo, 5, pageIndex);return pageBasePo;}}

建议在后台传给前台的JSON对象的时候是分页对象，这样方便在前台取值，也好数据回显。。。

2.3下面来看前台页面

<div class="center"><table border="1px red solid"><thead><tr ><th width="120px">歌单封面</th><th width="100px">歌单名称</th><th width="100px">歌单热度</th><th width="100px">收藏次数</th><th width="100px">标签</th><th width="100px">操作</th></tr></thead><tbody class="tb"><c:forEach items="${pageBasePo.list}" var="songListVo"><tr><td><img src="..${songListVo.songListPo.imgurl}"/></td><td>${songListVo.songListPo.songlistname}</td><td>${songListVo.songListPo.accesscount}</td><td>${songListVo.songListPo.collectioncount}</td><td>${songListVo.songListPo.tags}</td><td><a href="getSongListById?songListId=${songListVo.songListPo.songlistid}"><button class="layui-btn layui-btn-small"><i class="layui-icon"></i></button></a><a href="deleteSongListPo?songListId=${songListVo.songListPo.songlistid}"><button  class="layui-btn layui-btn-small"><i class="layui-icon"></i></button></td></tr></c:forEach></tbody></table><div id="ul"></div></div>

  var pageCount=5*${pageBasePo.pageCount};               laypage.render({elem: 'ul',count:pageCount ,limit:5,first: '首页',last: '尾页',prev: '<em>←</em>',next: '<em>→</em>',jump: function(obj, first){//页面跳转执行函数var search=$("#search").val();var pageIndex =obj.curr;//当前页码if(!first){ //首次不执行 $.get(//ajax刷新数据 "getPageSongList",{search:search,pageIndex:pageIndex},function(data){$(".tb").html("");//清空子节点data.list.forEach(function(value,index){//数据渲染//控制台输出测试 console.log(value);var $tr=$('<tr><td><img src="..'+value.songListPo.imgurl+'"/></td>'+'<td>'+value.songListPo.songlistname+'</td>'+'<td>'+value.songListPo.accesscount+'</td>'+'<td>'+value.songListPo.collectioncount+'</td>'+'<td>'+value.songListPo.tags+'</td>'+'<td><a href="getSongListById?songListId='+value.songListPo.songlistid+'">
<button class="layui-btn layui-btn-small"><i class="layui-icon"></i><button></a>'+'<a href="deleteSongListPo?songListId='+value.songListPo.songlistid+'">
<button data-method="confirmTrans" class="layui-btn layui-btn-small"><i class="layui-icon"></i><button></td></tr>'); $(".tb").append($tr);});} );}}}); });

3.我们来看下页面的效果（本人用的LayUI框架）

4.可能描述的有点不太详细，但是对于项目而言确实是有点头疼的有时候碰

到文件上传的时候，其实原理是可以参照SpringMVC的文件上传的，如果不太懂也可以私信问我哦！！！！