JavaWeb:浏览器中下载文件时，显示下载框

约定不等于承诺〃 2022-08-05 08:59 270阅读 0赞

**使用流来做：**

在Action中定义：

**1.定义变量**

fileName（文件名）

exportPath（导出文件夹地址）

exportResult（导出文件详细路径）

**2.定义get、set方法，设置一个getDowm**

/**
         * 下载文件流
         * <功能详细描述>
         * @return
         * @throws Exception
         * @see [类、类#方法、类#成员]
         */
        public InputStream getDownloadFile()
            throws Exception
        {
            File file = new File(getExportPath() + "\\" + exportResult);
            InputStream inputStream = null;
            
            //ServletActionContext.getResponse().addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(message, "UTF-8"));
            inputStream = new BufferedInputStream(new FileInputStream(file));
            
            return inputStream;
        }

</pre><pre name="code" class="java"><pre name="code" class="java">public String getExportPath()
        {
            exportPath = ServletActionContext.getServletContext().getRealPath("/UPLOAD-FILES/AUDIT");
            return exportPath;
        }
        
        public void setExportPath(String exportPath)
        {
            this.exportPath = exportPath;
        }

</pre><pre name="code" class="java">public String getFileName()
            throws Exception
        {
            if (exportResult.equals("failed"))
            {
                return null;
            }
            
            final String userAgent = ServletActionContext.getRequest().getHeader("USER-AGENT");
            if (StringUtils.contains(userAgent, "Mozilla"))
            {// 火狐浏览器
                exportResult = new String(exportResult.getBytes("UTF-8"), "ISO-8859-1");
            }
            else
            {
                exportResult = new String(exportResult.getBytes(), "UTF-8");
            }
            return exportResult;
            //return fileName;
        }
        
        public void setFileName(String fileName)
        {
            this.fileName = fileName;
        }

**在struts配置文件中：**

<action name="exportDailyAccount" class="com.cgdz.sims.actions.DailyAccountAction" method="exportExcel">
    			<result name="failed">/jsp/dailyAccount.jsp</result>
    			<result name="success" type="streamx"> 
    					<param name="contentType">text/plain</param> 
    					<param name="contentDisposition">attachment;filename="${fileName}"</param> 
    					<param name="inputName">downloadFile</param> 
    					<param name="contentCharSet">UTF-8</param>
    					<param name="bufferSize">4096</param>
    			</result>
    		</action>