WebUploader无刷新Ajax上传文件实例（Java Struts2版）

package cn.ubiton.com.upload; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.text.SimpleDateFormat; import javax.servlet.ServletContext; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionContext; public class Upload { /** * 普通批量上传文件方法 * * @param fa * 文件数组 * @param fna * 文件名称数组 * @return 上传文件的路径字符串 */ public String commUpload(File[] fa, String[] fna) { String paths = ""; ActionContext ac = ActionContext.getContext(); ServletContext sc = (ServletContext) ac.get(ServletActionContext.SERVLET_CONTEXT); String rp = sc.getRealPath("/"), folder = "", newNm = "", ext = ""; // String rp = "/data/web/static/", folder = "", newName = ""; File dir = null, destFile = null; InputStream is = null; OutputStream os = null; for(int i = 0; i < fa.length; ++i) { ext = fna[i].substring(fna[i].lastIndexOf(".")).toLowerCase(); if(".jpg.png.bmp.gif".indexOf(ext) != -1) { folder = newPath(1, rp); } else if(".flv".equals(ext)) { folder = newPath(2, rp); } else { folder = newPath(3, rp); } newNm = newName(fna[i]); dir = new File(folder); if(!dir.exists()) { dir.mkdirs(); } destFile = new File(dir, newNm); try { is = new FileInputStream(fa[i]); os = new FileOutputStream(destFile); byte[] buffer = new byte[400]; int length = 0; while((length = is.read(buffer)) > 0) { os.write(buffer, 0, length); } paths += dir + newNm +","; } catch(FileNotFoundException e) { e.printStackTrace(); } catch(IOException e) { e.printStackTrace(); } finally { try { is.close(); os.close(); } catch(IOException e) { e.printStackTrace(); } } } paths = paths.substring(0, paths.length()-1); return paths; } /** * 单个上传文件方法 * * @param fa * 文件 * @param fna * 文件名称 * @return 上传文件的路径 */ public String singleUpload(File fa, String fna) { String path = ""; ActionContext ac = ActionContext.getContext(); ServletContext sc = (ServletContext) ac.get(ServletActionContext.SERVLET_CONTEXT); String rp = sc.getRealPath("/"), folder = "", newNm = "", ext = ""; // String rp = "/data/web/static/", folder = "", newName = ""; File dir = null, destFile = null; InputStream is = null; OutputStream os = null; ext = fna.substring(fna.lastIndexOf(".")).toLowerCase(); if(".jpg.png.bmp.gif".indexOf(ext) != -1) { folder = newPath(1, rp); } else if(".flv".equals(ext)) { folder = newPath(2, rp); } else { folder = newPath(3, rp); } newNm = newName(fna); dir = new File(folder); if(!dir.exists()) { dir.mkdirs(); } destFile = new File(dir, newNm); try { is = new FileInputStream(fa); os = new FileOutputStream(destFile); byte[] buffer = new byte[400]; int length = 0; while((length = is.read(buffer)) > 0) { os.write(buffer, 0, length); } path = dir + newNm; } catch(FileNotFoundException e) { e.printStackTrace(); } catch(IOException e) { e.printStackTrace(); } finally { try { is.close(); os.close(); } catch(IOException e) { e.printStackTrace(); } } return path; } /** * 上传文件路径 * * @param fType * 文件类型标识，1为图片，2为视频，3为其它文件 * @param rp * 上传文件路径 * @return 上传文件的路径 */ public String newPath(int fType, String rp) { SimpleDateFormat sdf = new SimpleDateFormat("yyyyMM"); String dts = sdf.format(new java.util.Date()); switch(fType) { case 1 : rp += "files/img/" + dts + "/l/"; break; case 2 : rp += "files/vdo/" + dts + "/"; break; case 3 : rp += "files/oth/" + dts + "/"; break; default : rp += "files/oth/" + dts + "/"; break; } return rp; } /** * 重命名上传文件 * * @param srcName * 上传文件的文件名 * @return 重命名后的文件名 */ public String newName(String srcName) { SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss"); String ext = srcName.substring(srcName.lastIndexOf(".")), dt = sdf.format(new java.util.Date()), rd = Math.round(Math.random() * 900) + 100 + ""; return dt + rd + ext; } }