play framework 下载图片和pdf

来源：互联网发布：统计台账数据编辑：程序博客网时间：2024/05/17 06:02

在js中直接使用window.location.href 或者 window.open打开url 会在浏览器中直接开到文件（文件已经存在，不需要生成）
要实现在浏览器中下载的效果
java代码

public static void downloadFile(Long id){        DisposalUser disposalUser=DisposalUser.findById(id);        String url=disposalUser.attachment_file.substring(1, disposalUser.attachment_file.length());        String name=disposalUser.attachment_file.substring(disposalUser.attachment_file.lastIndexOf("/")+1, disposalUser.attachment_file.length());        String[] type=name.split("\\.");        File ff=new File(url);        try {            response.setHeader("Content-Disposition", "attachment;fileName="+URLEncoder.encode(type[0], "UTF-8")+"."+type[1]);        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        }        renderBinary(ff);    }

js代码

$(".download-btn").die().live("click", function() {    var attachment_file=$(this).attr("data-attachment-file");    if(attachment_file==""){        alert("文件不存在！");        return;    }    var id=$(this).attr("data-id");    window.location.href="/dispose/downloadFile?id="+id;//  window.open("/dispose/downloadFile?id="+id)});

另外一种导出excel文件
在服务器上生成文件，然后下载到本地

public static void exportAllBlackList(Integer time,@Required @Min(1) Long ti, String query, @DateWithTime String st,            @DateWithTime String et, @Min(1) Integer ps, @Min(1) Integer p, String sb,Integer so,Integer status,String ch,String fname            ,String weibotype,String weiboname){        if(time!=null&&time!=-1&&time!=0){            JSONObject range = util.DateUtil.timeRanges(time);            st = range.getString("st");            et = range.getString("et");        }        if(sb==null){            sb = "real_time";        }        if(so==null){            so = -1;        }        String path = "public/check/";        // 创建素材保存目录        File toSave = new File(path);        if (!toSave.exists()) {            toSave.mkdirs();        }        List<Map> result=new ArrayList<Map>();        Groups group=Groups.findById(ti);        String taskName=group.groupName;        String fileName = path + sdf.format(new Date())+taskName.replace("#", "") + "-"+fname+".xls";        HSSFWorkbook wb = new HSSFWorkbook();        result=models.Account.getBlackDocList(query, st, et, ti, p, ps, sb, so,status,false);        ForExcelWB(wb,result,weibotype,weiboname);        try {            FileOutputStream fout = new FileOutputStream(fileName);            wb.write(fout);            fout.flush();            fout.close();            fileName = "/" + fileName; // 修正下载路径            Operate.saveOperate(5, "导出全部的黑名单文章列表-["+ti+"]-"+fileName,getIp());            renderJSON(ResultInfo.success(fileName, ""));        } catch (Exception e) {            e.printStackTrace();            Logger.error(e.getMessage(),e);            renderJSON(ResultInfo.error("导出失败"));        }    }

js代码

 export_all(ti,time,st,et,so,sb,"0,1,2",5,weibotype,weixintype,weiboname,weixinname,function(data){                            $("body").removeClass("fcyshow");                            if(data.result=="success"){                                window.location.href=data.info.substring(0,data.info.lastIndexOf("/")+1)+encodeURIComponent(data.info.substring(data.info.lastIndexOf("/")+1,data.info.length));                            }else{                                alert(data.msg);                            }                      });

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