基于struts2开发的文件上传和下载工具

package org.great.util.file.filedownload; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.util.ArrayList; import java.util.List; import javax.servlet.ServletContext; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.struts2.ServletActionContext; import org.great.util.file.common.Config; import org.great.util.file.common.Util; import com.opensymphony.xwork2.Action; public class FileDownloadAction implements Action { private Log log = LogFactory.getLog(this.getClass()); private List<String> fnameList; private String keyFileName; private String inputPath; public String getInputPath() { return inputPath; } private String key; public String getKey() { return key; } public void setKey(String key) { this.key = key; } public void setInputPath(String value) { inputPath = value; } public String getKeyFileName() { return keyFileName; } public void setKeyFileName(String keyFileName) { this.keyFileName = keyFileName; } public List<String> getFnameList() { return fnameList; } public void setFnameList(List<String> fnameList) { this.fnameList = fnameList; } /** * 下载文件 */ public String execute() throws Exception { log.info("下载文件:"+keyFileName); return SUCCESS; } /** * 列出可下载文件列表 * @return * @throws Exception */ public String listDownFile() throws Exception { ServletContext context = ServletActionContext.getServletContext(); Util util = new Util(); String filepath = util.convertPath(context); File dir = new File(filepath); String[] fnames = null; if (key != null) { fnames = dir.list(new MyFileFilter(key)); } else { fnames = dir.list(); } if (fnames != null && fnames.length > 0) { fnameList = new ArrayList<String>(); for (String f : fnames) { fnameList.add(f); } } return SUCCESS; } public InputStream getInputStream() throws Exception { InputStream is = null; Util util = new Util(); String inputPath = util.convertPath(ServletActionContext.getServletContext()); is = new FileInputStream(inputPath + "/" + keyFileName); return is; } // 如果下载文件名为中文，进行字符编码转换 public String getKeyFile() { String downloadChineseFileName = keyFileName; try { downloadChineseFileName = new String( downloadChineseFileName.getBytes("gbk"), "iso-8859-1"); } catch (Exception e) { log.info("return getKeyFile.", e); } return downloadChineseFileName; } }