struts2文件上传下载
之前没写过struts2上传下载，只是知道大概怎么搞，最近项目中用到，正巧赶上了，编码过程中遇到过一些问题，如上传文件类型，中文乱码，兼容性问题等，不过都一一解决了，下面附上自己的代码。以便将来查阅...
也希望这篇随便能够帮助很多朋友少走些弯路把！
1.文件上传
首先是jsp页面的代码
在jsp页面中定义一个上传标签
1 <tr> 2 <td align="right" bgcolor="#F5F8F9"><b>附件：</b></td> 3 <td bgcolor="#FFFFFF"> 4 <input type="file" name="upload" /> 5 </td> 6 <td bgcolor="#FFFFFF"> </td> 7 </tr>
然后是BaseAction中定义的相关属性其它的就省略了（也可定义在自己的Action，换下访问修饰符即可）
1 /** 2 *Action基类 3 **/ 4 public class BaseAction extends ActionSupport { 5 6 protected List<File> upload; 7 protected List<String> uploadContentType; //文件类型 8 protected List<String> uploadFileName; //文件名 9 protected String savePath; //保存路径 10 11 }
然后是Action中的一个上传方法，代码如下：
1 /** 2 * 8.上传附件 3 * @param upload 4 */ 5 public void uploadAccess(List<File> upload){ 6 try { 7 if (null != upload) { 8 for (int i = 0; i < upload.size(); i++) { 9 String path = getSavePath() + "\\"+ getUploadFileName().get(i); 10 System.out.println(path); 11 item.setAccessory(getUploadFileName().get(i)); 12 13 FileOutputStream fos = new FileOutputStream(path); 14 FileInputStream fis = new FileInputStream(getUpload().get(i)); 15 byte[] buffer = new byte[1024]; 16 int len = 0; 17 while ((len = fis.read(buffer)) > 0) { 18 fos.write(buffer, 0, len); 19 } 20 fis.close(); 21 fos.close(); 22 } 23 } 24 } catch (Exception e) { 25 logger.error("上传附件错误。", e); 26 } 27 }
接着是我的struts2.xml文件
1 <action name="itemRDAction_*" class="itemRDAction" method="{1}"> 2 <param name="savePath">e:\upload</param> 3 <interceptor-ref name="defaultStack"> 4 <param name="fileUpload.allowedTypes"> 5 application/octet-stream,image/pjpeg,image/bmp,image/jpg,image/png,image/gif,image/jpeg,application/msword,application/vnd.openxmlformats-officedocument.wordprocessingml.document,application/vnd.ms-excel 6 </param> 7 <param name="fileUpload.maximumSize">8000000</param> 8 </interceptor-ref> 9 <result name="show_item_rd_upd"> /WEB-INF/jsp/page_item/updItem_rd.jsp</result> 10 <result name="show_item_rd_list"> /WEB-INF/jsp/page_item/listItem_rd.jsp</result> 11 <result name="show_item_rd_push"> /WEB-INF/jsp/page_item/pushItem_rd.jsp</result> 12 </action>
savePath为保存路径，fileUpload.allowedTypes 用来限制上传文件类型 fileUpload.maximumSize 文件大小限制
2.文件下载
首先是页面中的下载链接
1 <tr> 2 <td width="20%" align="right" bgcolor="#F5F8F9"><b>附件：</b></td> 3 <td width="40%" bgcolor="#FFFFFF"> 4 <div style="width:355px; float: left;">${item.accessory}</div> 5 <c:if test="${!empty item.accessory}"> 6 <div class="btn_img" style="float: left;"><a style="color: black; text-decoration: none;" href="download.action?filename=${item.accessory}">下载</a></div> 7 </c:if> 8 </td> 9 <td width="40%" bgcolor="#FFFFFF"> </td> 10 </tr>
接着是DownloadAction的代码：
1 /** 2 * DownloadAction 3 * 4 * @author zhaoxz 5 * 6 */ 7 @Controller("downloadAction") 8 @Scope("prototype") 9 public class DownloadAction extends BaseAction { 10 11 /** 12 * 13 */ 14 private static final long serialVersionUID = -4278687717124480968L; 15 16 private static Logger logger = Logger.getLogger(DownloadAction.class); 17 18 private String filename; 19 private InputStream inputStream; 20 private String savePath; 21 private String mimeType; 22 23 public InputStream getInputStream() { 24 try { 25 String path = getSavePath() + "//"+ new String(filename.getBytes("ISO8859-1"), "utf-8"); 26 System.out.println(path); 27 mimeType = ServletActionContext.getServletContext().getMimeType(path)+ ";charset=UTF-8"; 28 inputStream = new FileInputStream(path); 29 String agent = request.getHeader("USER-AGENT"); 30 System.out.println(agent); 31 if (null != agent) { 32 if (-1 != agent.indexOf("Firefox")) {// Firefox 33 mimeType = mimeType.replace("UTF-8", "ISO8859-1"); 34 } else {// IE7+ Chrome 35 System.out.println("IE,Chrome"); 36 filename = new String(filename.getBytes("ISO8859-1"),"utf-8"); 37 filename = java.net.URLEncoder.encode(filename, "UTF-8"); 38 } 39 } 40 } catch (Exception e) { 41 logger.error("下载文件信息出错。", e); 42 } 43 if (null == inputStream) { 44 System.out.println("getResource error"); 45 } 46 return inputStream; 47 } 48 49 public void setInputStream(InputStream inputStream) { 50 this.inputStream = inputStream; 51 } 52 53 @Override 54 public String execute() throws Exception { 55 return SUCCESS; 56 } 57 58 /*************************** get set ******************************/ 59 public String getSavePath() { 60 return this.savePath; 61 } 62 63 public void setSavePath(String savePath) { 64 this.savePath = savePath; 65 } 66 67 public String getFilename() { 68 return filename; 69 } 70 71 public void setFilename(String filename) { 72 this.filename = filename; 73 } 74 }
然后是它的struts2.xml文件：
1 <action name="download" class="downloadAction"> 2 <param name="savePath">E:/upload</param> 3 <result type="stream"> 4 <param name="contentType">${mimeType}</param> 5 <param name="contentDisposition">attachment;filename="${filename}"</param> 6 <param name="inputName">inputStream</param> 7 </result> 8 </action>
下载的话注意下编码格式基本应该就没什么问题了..希望能帮的你们!本人年纪比较小是个小白...要学的东西很多，有什么需要改进的地方还请各位明示！在此谢过了。
