多文件上传【下载、删除】

  ···接上篇

jsp页面：

<s:iterator value="gsXmsjbz.temp" status="fn"><tr class="td_title_noleft"><td class='td_title_blue_right' width="50%"><input type="checkbox" name="check"> <s:file name="file" cssClass="input-text-line" cssStyle="width:90%" theme="simple"/> </td> <td class='td_title_blue_right' width="40%" style="font-size: 12px" mce_style="font-size: 12px"><!-- 上传成功文件名 --><s:property /></td><td class='td_title_blue_right' width="10%" style="font-size: 12px" mce_style="font-size: 12px"><!-- 下载文件链接内容为定义的下载Action --><!-- 下载文件名作为链接参数fileName值，用OGNL表达式表达 --> <a href="<%=path %>/sjps/download.action?fileName=<s:property />">下载</a><a href="<%=path %>/sjps/delete.action?fileName=<s:property />&id=<s:property value="PBaseset.projectId"/>">删除</a> </td> </tr> </s:iterator>

简单注释下：gsXmsjbz.temp是在po中的一个List<String>类型的变量，用来显示已经上传到文件。

 

上传Action：

//多文件上传StringBuilder zyftfb = new StringBuilder();if(null!=file){for (int i = 0; i < file.size(); i++) {//循环上传每个文件 try {if(null!=gsXmsjbz.getZyftfb()){zyftfb.append(",").append(gsXmsjbz.getZyftfb());}doUpload(i,zyftfb);} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}if(zyftfb.length()>0){String zyftfbPath = zyftfb.substring(1);gsXmsjbz.setZyftfb(zyftfbPath);}}

doUpload :  执行多文件上传功能

//执行上传功能private void doUpload(int i,StringBuilder sjsfjPath) throws FileNotFoundException, IOException {try {InputStream in = new FileInputStream(file.get(i));String dir = ServletActionContext.getRequest().getRealPath(UPLOADDIR);sjsfjPath.append(",").append(this.getFileFileName().get(i)) ;File doneFile = new File(dir, this.getFileFileName().get(i));OutputStream out = new FileOutputStream(doneFile);byte[] buffer = new byte[BUFFER_SIZE];int length;while ((length = in.read(buffer)) > 0) {out.write(buffer, 0, length);}in.close();out.close();} catch (FileNotFoundException ex) {ex.printStackTrace();} catch (IOException ex) {ex.printStackTrace();}}

 

文件下载：

import java.io.InputStream;import java.io.UnsupportedEncodingException;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;/** * @author zengwei * @date 2010/11/01 */public class DownLoadAction extends ActionSupport {private static final long serialVersionUID = -9067129925543589996L;//下载文件原始存放路径private final static String DOWNLOADFILEPATH="/upload/";//文件名参数变量private String fileName;public String getFileName() {try {fileName = new String(fileName.getBytes("ISO8859-1"), "utf-8");} catch (UnsupportedEncodingException e) {e.printStackTrace();}return fileName;}public void setFileName(String fileName) {try {fileName = new String(fileName.getBytes("ISO8859-1"), "utf-8");} catch (UnsupportedEncodingException e) {e.printStackTrace();}this.fileName = fileName;}//从下载文件原始存放路径读取得到文件输出流public InputStream getDownloadFile() {return ServletActionContext.getServletContext().getResourceAsStream(DOWNLOADFILEPATH+fileName);}//如果下载文件名为中文，进行字符编码转换public String getDownloadChineseFileName() {String downloadChineseFileName = fileName;try {downloadChineseFileName = new String(downloadChineseFileName.getBytes(), "ISO8859-1");return downloadChineseFileName;} catch (UnsupportedEncodingException e) {e.printStackTrace();return null;}}public String execute() {return SUCCESS;}}

 

struts.xml

<!-- 下载文件的Action定义 --><action name="download" class="DownLoadAction"><!-- 设置文件名参数，由页面上传入 --><param name="fileName"></param><result name="success" type="stream"><!-- 下载文件类型定义 --><param name="contentType">text/plain</param><!-- 下载文件处理方法 --><param name="contentDisposition">attachment;filename="${downloadChineseFileName}"</param><!-- 下载文件输出流定义 --><param name="inputName">downloadFile</param></result></action><!-- 文件删除 --><action name="delete" class="DeleteAction"><result name="success" type="redirect">/sjps/sjbzAdd.action?id=${id}</result><result name="input">/main.jsp</result></action><action name="singleDelete" method="singleDelete" class="DeleteAction"><result name="success" type="redirect">/sjps/sjbzAdd.action?id=${id}</result><result name="input">/main.jsp</result></action>

 

文件删除：

@Overridepublic String execute() throws Exception {id = request.getParameter("id");if(id!=null&&id.length()>0){PBaseset = rwsService.getRwsByProjectId(Long.parseLong(id));}gsXmsjbz = PBaseset.getGsXmsjbz();String fileName = request.getParameter("fileName");String path = ServletActionContext.getServletContext().getRealPath(""); String myfilePath = path + "//upload"+"//" + fileName; StringBuilder sb = new StringBuilder();File myfile = new File(myfilePath); if(myfile.exists()){String zyftfb = gsXmsjbz.getZyftfb();String[] ftfb = zyftfb.split(",");for(String a:ftfb){//sb.append(a).append(",");if(!fileName.equals(a)){sb.append(",").append(a);}else{sb.append("");}}if(sb.length()>0){String zyftfbPath = sb.substring(1);gsXmsjbz.setZyftfb(zyftfbPath);}else{gsXmsjbz.setZyftfb(null);}myfile.delete();}xmsjbzService.save(gsXmsjbz);return SUCCESS;}

 

效果图：

单文件

 

多文件

 

OK！收工