WebWork下载的实现是怎么样的,很多新手对此不是很清楚,为了帮助大家解决这个难题,下面小编将为大家详细讲解,有这方面需求的人可以来学习下,希望你能有所收获。
WebWork下载文件时,首先在xwork.xml中添加以下内容:
<action name="download" class="com.mycompany.action.FileDownloadAction"> <result name="success" type="stream"> <param name="contentType">application/octet-stream</param> <param name="inputName">inputStream</param> <param name="contentDisposition">attachment;filename="${downloadFileName}"</param> <param name="bufferSize">4096</param> </result> </action> <action name="download" class="com.mycompany.action.FileDownloadAction"> <result name="success" type="stream"> <param name="contentType">application/octet-stream</param> <param name="inputName">inputStream</param> <param name="contentDisposition">attachment;filename="${downloadFileName}"</param> <param name="bufferSize">4096</param> </result> </action>
这时需要把fileName作为参数传过来,以下是action:
import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.InputStream; import java.io.UnsupportedEncodingException; import com.opensymphony.xwork.Action; public class FileDownloadAction implements Action { private String fileName = ""; public InputStream getInputStream () throws Exception { InputStream is = null; try { is = new FileInputStream(fileName); } catch (FileNotFoundException e1) { } return is; } public String execute () throws Exception { return SUCCESS; } public void setFileName (String fileName) { this.fileName = fileName; } public String getFileName () { return fileName; } public String getDownloadFileName () { String downFileName = fileName; try { downFileName = new String(downFileName.getBytes(), "utf8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return downFileName; } }
至此就完成了WebWork下载。
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