Bootstrap Fileinput 4.4.7文件上传实例详解

本实例所做功能为发送带附件邮件，可以上传多个附件，操作为选择一个附件以后自动上传，然后继续选择附件，填写完表单其他信息，点击保存发送带附件邮件。

html标签

<input id="fileupload" type="file" name="file" data-show-preview="true" multiple/>

js初始化，设置全局文件名参数

var filename = [];
function initfileinput(id, url) {
    $("#" + id).fileinput({
      language: 'zh', 
      uploadasync:false,
      uploadurl:url,
      browseclass: "btn btn-secondary",
      textencoding:"utf-8",
      showupload: false,
      showpreview :true,
      dropzoneenabled: false,
      maxfilecount:5,
      fileactionsettings:{
        showupload: true
      },
      enctype:'multipart/form-data',
      msgfilestoomany: "选择上传的文件数量({n}) 超过允许的最大数值{m}！",
    }).on("filebatchselected", function(event, files) {
      $("#fileupload").fileinput("upload");
    }).on("filebatchuploadsuccess", function (event, data, previewid, index){
      if(data.response.success == true)
      {
        filename.push(data.response.filename);
      }else{
        alert("上传失败!");
      }
      $("#fileupload").fileinput("clear");
      $("#fileupload").fileinput("reset");
    }).on('fileerror', function(event, data, msg) {
       alert(msg);
    });
  }

java后台上传文件代码

@requestmapping(value="/fileupload")
  @responsebody
  public map<string, object> fileupload(httpservletrequest request, httpservletresponse response) {
    resourcebundle bundle = propertyresourcebundle.getbundle("application");
    multiparthttpservletrequest multipartrequest = (multiparthttpservletrequest)request;
    map<string,multipartfile> filemap = multipartrequest.getfilemap();
    string rootpath = bundle.getstring("uploadurl");
    string filepath = rootpath;
    map<string, object> map = new hashmap<>();
    map = uploadfiles(filepath,filemap);
    return map;
  }

实际上传操作，返回上传操作经过处理的文件名，保证服务器端文件名唯一

public map<string, object> uploadfiles(string savepath,map<string,multipartfile> filemap){
    map<string, object> map = new hashmap<>();
    try {
      string filename = "";
      if(filemap!=null){
        for(map.entry<string, multipartfile> entity:filemap.entryset()){
          multipartfile f = entity.getvalue();
          if(f != null && !f.isempty()){
            string uuid = uuid.randomuuid().tostring();
            filename = uuid + "#" + f.getoriginalfilename();
            file newfile = new file(savepath + "/" + filename); 
            f.transferto(newfile);
          }
        }
      }
      map.put("success", true);
      map.put("filename", filename);
      return map;
    }catch (exception e) {
      map.put("success", false);
      return map;
   }
}

ajax提交其他表单参数和所传附件文件名集合

$.ajax({
      type: "post",
      url: 所需要请求地址,
      datatype: "json",
      traditional:true,
      data: {
        service:$("#service").select2('val').replace("all",""),
        starttime:$("#start").val(),
        endtime:$("#end").val(),
        reason:$("#reason").val(),
        filename:json.stringify(filename),
        outteremail:isoutteremail,
        inneremail:isinneremail,
        issendemail:issendemail,
        subservice:$("#subservice").select2('val'),
        runningstatus:$("#runningstatus").select2('val')
      },
      success: function(data){
        $("#loadingmodal").modal("hide");
        filename.splice(0,filename.length);
        alert(data.msg);
        if(data.success) {
          location.href = "revision";
        }
      },
      error:function(xhr) {
        $("#loadingmodal").modal("hide");
        alert("保存失败");
      }
    });

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。