SpringMVC框架结合amazeUI前端框架form表单上传多文件和实体

在看这篇博文之前，你应该先搭好SpringMVC框架，并下载amazeUI包，并参见教程配置好，具体参见百度上的教程，教程很多，这里就不多说啦。
下面是表单的信息，其中，图片上传实现了多张图片的上传，并且可以在线预览。

<form class="am-form am-form-horizontal" method="post" id="edit-form" action="nmgindexintro/save" />">
    <input type="hidden"  name="branchId" value="${branchId}">

    <fieldset>
        <legend>内蒙古公司展示legend>
        <div class="am-g">
            <div class="am-u-sm-8">

              <div class="am-form-group am-form-select am-g">
                <label for="oc-ds-select-1" class="am-u-sm-2  am-form-label" style="font-size:12px;">文章类型label>
                <div class="am-u-sm-4 am-u-end">
                    <select name="type" id="oc-ds-select-1">
                        <option value="1">风土人情option>
                        <option value="2">经济概况option>
                        <option value="3">行业概况option>
                    select>
                div>
              div>

              <div class="am-form-group am-g">
                <label for="doc-ipt-title-1" class="am-u-sm-2  am-form-label" style="font-size:12px;">标题label>
                <div class="am-u-sm-4 am-u-end">
                  <input type="text" id="doc-ipt-title-1" placeholder="输入标题" name="title" >
                div>
              div>

               <div class="am-form-group am-form-file am-g">
                 <label for="doc-ipt-file-2" class="am-u-sm-2  am-form-label" style="font-size:12px;">选择图片label>
                 <div class="am-u-sm-4 am-u-end">
                   <button type="button" class="am-btn am-btn-default am-btn-sm">
                     <i class="am-icon-cloud-upload">i> 选择图片button>
                 div>
                 <input  type="file" id="doc-ipt-file-2" name="titleImage"  multiple onchange="javascript:setImagePreviews();" accept=".jpg, .png ,.gif , .jpeg">
               div>

               <div id="file-list">div>

                <div class="am-form-group am-form-file am-g">
                  <label for="doc-ipt-file-3" class="am-u-sm-2 am-form-label" style="font-size:12px;">选择.MP4文件label>
                  <div  class="am-u-sm-4 am-u-end">
                    <button type="button" class="am-btn am-btn-default am-btn-sm">
                      <i class="am-icon-cloud-upload">i> 选择.MP4文件button>
                  div>
                  <input type="file" id="doc-ipt-file-3" name="video" accept=".mp4">
                div>  

                 <div id="file-list2">div>

             div>
             <div class="am-u-sm-4" id="preview" style=" width:300px;height:220px;overflow:auto;">预览图片div>
        div>
        <div class="am-form-group am-form-select am-g">
            <fieldset>
                <legend>公司展示legend>
                <input type="hidden"  name="id" value="${info.id}">
                <script id="container" name="content" type="text/plain" >

                script>
            fieldset> 
        div>


        <div class="am-g">
            <p class="am-u-sm-1 am-u-sm-centered"><button type="submit" class="am-btn am-btn-default ">提交button>p>    
        div>
    fieldset>
form>
<script>
  $('#doc-ipt-file-2').on('change', function() {
              var fileNames = '';
              $.each(this.files, function() {
                fileNames += '' + this.name + ' ';
              });
              $('#file-list').html(fileNames);
            }); 

       $('#doc-ipt-file-3').on('change', function() {
              var fileNames = '';
              $.each(this.files, function() {
                fileNames += '' + this.name + ' ';
              });
              $('#file-list2').html(fileNames);
            }); 
   //图片预览功能
            //下面用于多图片上传预览功能
    function setImagePreviews(avalue) {
        //获取选择图片的对象
        var docObj = document.getElementById("doc-ipt-file-2");
        //后期显示图片区域的对象
        var dd = document.getElementById("preview");
        dd.innerHTML = "";
        //得到所有的图片文件
        var fileList = docObj.files;
        //循环遍历
        for (var i = 0; i < fileList.length; i++) {    
            //动态添加html元素        
            dd.innerHTML += "
  
";
            //获取图片imgi的对象
            var imgObjPreview = document.getElementById("img"+i); 

            if (docObj.files && docObj.files[i]) {
                //火狐下，直接设img属性
                imgObjPreview.style.display = 'block';
                imgObjPreview.style.width = '200px';
                imgObjPreview.style.height = '180px';
                //imgObjPreview.src = docObj.files[0].getAsDataURL();
                //火狐7以上版本不能用上面的getAsDataURL()方式获取，需要以下方式
                imgObjPreview.src = window.URL.createObjectURL(docObj.files[i]);   //获取上传图片文件的物理路径
            }
            else {
                //IE下，使用滤镜
                docObj.select();
                var imgSrc = document.selection.createRange().text;
                //alert(imgSrc)
                var localImagId = document.getElementById("img" + i);
               //必须设置初始大小
                localImagId.style.width = "200px";
                localImagId.style.height = "180px";
                //图片异常的捕捉，防止用户修改后缀来伪造图片
                try {
                    localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
                    localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;
                }
                catch (e) {
                    alert("您上传的图片格式不正确，请重新选择!");
                    return false;
                }
                imgObjPreview.style.display = 'none';
                document.selection.empty();
            }
        }  
        return true;
    }

接下来是后台处理程序
Controller主要是保存图片，并且记下图片的路径并创建唯一名称，传至后台入数据库。

@RequestMapping(value={"/save"}, method=RequestMethod.POST)
    @ResponseBody
    public String save(@RequestParam("titleImage") MultipartFile[] titleImage,@RequestParam("video") MultipartFile video,HttpServletRequest servletRequest) throws IOException {

        List listPicture=new LinkedList();
        for(MultipartFile picture : titleImage){  
            if(picture.isEmpty()){  
                System.out.println("图片未上传");  
            }else{  
                String savePath = request.getScheme() + "://" + request.getServerName()
                + ":" + request.getServerPort() + request.getContextPath()
                + "/static/js/u_editor/jsp/upload/";
                String realPath = request.getSession().getServletContext().getRealPath("/static/js/u_editor/jsp/upload");
                System.out.println(savePath);
                System.out.println(realPath);
                Date date = new Date();
                SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
                String str = sdf.format(date)+picture.getOriginalFilename();

                //这里不必处理IO流关闭的问题，因为FileUtils.copyInputStreamToFile()方法内部会自动把用到的IO流关掉，我是看它的源码才知道的  
                FileUtils.copyInputStreamToFile(picture.getInputStream(), new File(realPath, str)); 
                listPicture.add(savePath+str);
            }  
        }  
        String Video=null;
        if(video.isEmpty()){  
            System.out.println("视频未上传");  
        }else{  
            String savePath = request.getScheme() + "://" + request.getServerName()
            + ":" + request.getServerPort() + request.getContextPath()
            + "/static/js/u_editor/jsp/upload/";
            String realPath = request.getSession().getServletContext().getRealPath("/static/js/u_editor/jsp/upload");
            Date date = new Date();
            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
            String str = sdf.format(date);
            //这里不必处理IO流关闭的问题，因为FileUtils.copyInputStreamToFile()方法内部会自动把用到的IO流关掉，我是看它的源码才知道的  
            FileUtils.copyInputStreamToFile(video.getInputStream(), new File(realPath, str+video.getOriginalFilename())); 
           Video = savePath+str+video.getOriginalFilename();
           System.out.println(Video);
        }  

        NmgIndexIntroUpdateRequest request =new NmgIndexIntroUpdateRequest();
        request.setContent(servletRequest.getParameter("content"));
        request.setTitle(servletRequest.getParameter("title"));
        request.setTitleImage(listPicture);
        request.setVideo(Video);
        request.setType(servletRequest.getParameter("type"));
        request.setBranchId(servletRequest.getParameter("branchId"));


        NmgIndexIntroAccesser accesser = this.accesserFactory.createAccesser(NmgIndexIntroAccesser.class,CurrentUser.getAccessToken());
        JSONObject result = new JSONObject();
        try{
        Response response = accesser.save(request);

        switch (Status.fromStatusCode(response.getStatus())) {
        case FOUND:
            result.put("success", false);
            result.put("msg", "文章已存在");
            break;
        case OK:
            String uuid = response.readEntity(String.class);
            result.put("success", true);
            result.put("uuid", uuid);
            result.put("msg", "创建成功");
            break;
        default:
            result.put("success", false);
            result.put("msg", "操作失败，请重试。");
            break;
        }
        return result.toString();
    } finally {
        accesser.close();
    }
    }

Accesser，连接前台与后台的桥梁，通过调用相应的接口，连接后台，并将实体和图片路径入库。

@Override
    public Response save(NmgIndexIntroUpdateRequest request) {
        Assert.notNull(this.access_token, "access token required");
        String uri = ResteasyWebResourceMap.get("NmgIndexIntroInterface.save");
        AccessParameter parameters = new AccessParameter();
        parameters.appendQueryParam("access_token", access_token);
        ResteasyWebTarget target = this.buildJsonTarget(uri, parameters);
        Response response = target.request().post(Entity.json(request));
        return response;
    }

Interface接口类，连接后台资源。

package com.kinth.admin.server.rest.api.interfaces;




import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.core.Response;

import com.kinth.base.rest.api.entity.NmgIndexIntroListRequest;
import com.kinth.base.rest.api.entity.NmgIndexIntroSearch;
import com.kinth.security.persistent.entity.NmgIndexIntroUpdateRequest;

@Path("admin/nmgindexintro")
public interface NmgIndexIntroInterface {
    /**
     * 分页查询列表
     * @param request
     * @return
     */
    @POST
    @Path("search")
    Response search(NmgIndexIntroSearch request);

    /**
     * 更新
     * @param 
     * @return
     */
    @PUT
    @Path("update")
    Response update(NmgIndexIntroUpdateRequest request);

    /**
     * 详情
     * @param 
     * @return
     */
    @POST
    @Path("edit")
    Response get(Integer id);

    @POST
    @Path("list")
    Response list(NmgIndexIntroListRequest request);

    @POST
    @Path("save")
    Response save(NmgIndexIntroUpdateRequest request);
}

Resourse连接底层DAO层，将实体和图片，视频路径入库。

@Override
    public Response save(NmgIndexIntroUpdateRequest request) {
        NmgIndexIntro nmg= NmgIndexIntroDao.findBybranchIdAndType(request.getBranchId(), request.getType());
        if(nmg != null) {
            return Response.status(Status.FOUND)
                           .entity(new ErrorResponse("文章已存在", "文章已存在"))
                           .build();
            }
        NmgIndexIntro nii=new NmgIndexIntro();
        nii.setBranchId(request.getBranchId());
        nii.setContent(request.getContent());
        nii.setCreateTime(new Date());
        nii.setStatus("1");
        nii.setTitle(request.getTitle());
        if(request.getTitleImage()!=null){
            String titleImage="";
            for(String s:request.getTitleImage()){
                titleImage+=s;
                titleImage+=",";
            }
            nii.setTitleImage(titleImage);
        }
        nii.setType(request.getType());
        if(request.getVideo()!=""){
            nii.setVideo(request.getVideo());
        }
        nii.setShortContent(request.getTitle()+request.getTitleImage());
        this.NmgIndexIntroDao.saveAndFlush(nii);
        return Response.ok().build();
    }

DAO层

package com.kinth.security.persistent.dao;
import com.kinth.base.persistent.BaseDAO;
import com.kinth.security.persistent.entity.NmgIndexIntro;

public interface NmgIndexIntroDAO extends BaseDAO{
    NmgIndexIntro findBybranchId(String branchId);
    NmgIndexIntro findById(Integer id);
    NmgIndexIntro findBybranchIdAndId(String branchId,Integer id);
    NmgIndexIntro findBybranchIdAndType(String brandId,String Type);
}

实体entity

package com.kinth.security.persistent.entity;

import java.io.Serializable;
import javax.persistence.*;
import java.util.Date;


/**
 * The persistent class for the nmg_index_intro database table.
 * 
 */
@Entity
@Table(name="nmg_index_intro")
@NamedQuery(name="NmgIndexIntro.findAll", query="SELECT n FROM NmgIndexIntro n")
public class NmgIndexIntro implements Serializable {
    private static final long serialVersionUID = 1L;
    private Integer id;
    private String branchId;
    private String content;
    private Date createTime;
    private String shortContent;
    private String status;
    private String title;
    private String titleImage;
    private String type;
    private String video;

    public NmgIndexIntro() {
    }


    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    public Integer getId() {
        return this.id;
    }

    public void setId(Integer id) {
        this.id = id;
    }


    @Column(name="branch_id")
    public String getBranchId() {
        return this.branchId;
    }

    public void setBranchId(String branchId) {
        this.branchId = branchId;
    }


    @Lob
    public String getContent() {
        return this.content;
    }

    public void setContent(String content) {
        this.content = content;
    }


    @Temporal(TemporalType.TIMESTAMP)
    @Column(name="create_time")
    public Date getCreateTime() {
        return this.createTime;
    }

    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }


    @Lob
    @Column(name="short_content")
    public String getShortContent() {
        return this.shortContent;
    }

    public void setShortContent(String shortContent) {
        this.shortContent = shortContent;
    }


    public String getStatus() {
        return this.status;
    }

    public void setStatus(String status) {
        this.status = status;
    }


    public String getTitle() {
        return this.title;
    }

    public void setTitle(String title) {
        this.title = title;
    }


    @Column(name="title_image")
    public String getTitleImage() {
        return this.titleImage;
    }

    public void setTitleImage(String titleImage) {
        this.titleImage = titleImage;
    }


    public String getType() {
        return this.type;
    }

    public void setType(String type) {
        this.type = type;
    }

    @Column(name="video")
    public String getVideo() {
        return this.video;
    }

    public void setVideo(String video) {
        this.video = video;
    }
}