package com.sais.inkaNet.common.displayImage; import com.opensymphony.xwork2.ActionSupport; import com.sais.inkaNet.base.util.FtpImageDisplay; import com.sais.inkaNet.base.util.PropertiesUtil; import org.apache.log4j.Logger; import org.apache.struts2.ServletActionContext; import javax.servlet.http.HttpServletResponse; public class DisplayImageAction extends ActionSupport { private static final long serialVersionUID = 1L; private static final Logger log = Logger.getLogger(DisplayImageAction.class); /** * <p>屬性描述: [要訪問的圖片url]</p> */ private String imageUrl; /** * <p>屬性描述: [ftp ip地址]</p> */ private String ip = PropertiesUtil.getSetting("ftp.ip", ""); /** * <p>屬性描述: [ftp密碼]</p> */ private String password = PropertiesUtil.getSetting("ftp.password", ""); //---------ftp--------- /** * <p>屬性描述: [用戶名]</p> */ private String username = PropertiesUtil.getSetting("ftp.username", ""); /** * <p>方法描述: [獲得ftp中的圖片用於頁面顯示]</p> * * @return 返回結果的說明 * * @throws Exception 拋出異常的原因 */ @Override public String execute() throws Exception { log.info("-->獲得ftp圖片,imageUrl:"+imageUrl); /** 1.+ 表示空格(在 URL 中不能使用 空格) %20 2./ 分隔目錄和子目錄 %2F 3.? 分隔實際的 URL 和參數 %3F 4.% 指定特殊字符 %25 5.# 表示書籤 %23 6.& URL 中指定的參數間的分隔符 %26 7.@ %40 */ imageUrl = imageUrl.contains("\\") ? imageUrl.replace("\\", "%2F") : imageUrl; imageUrl = imageUrl.contains("/") ? imageUrl.replace("/", "%2F") : imageUrl; password = password.contains("@")?password.replace("@", "%40"):password; HttpServletResponse response = ServletActionContext.getResponse(); FtpImageDisplay.getFtpImage(username, password, ip, imageUrl, response); return NONE; } public String getImageUrl() { return imageUrl; } public void setImageUrl(String imageUrl) { this.imageUrl = imageUrl; } }package com.sais.inkaNet.base.util; import org.apache.log4j.Logger; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.URL; import java.net.URLConnection; import javax.servlet.http.HttpServletResponse; public class FtpImageDisplay { /** * <p>屬性描述: [聲明日誌]</p> */ private static final Logger log = Logger.getLogger(FtpImageDisplay.class); /** * <p>方法描述: [從ftp中獲得圖片流返給頁面]</p> * * @param username 用戶名 * @param password 密碼 * @param ftpUrl ftp的url * @param fileUrl 文件路徑 * @param response Response對象 */ public static void getFtpImage(String username, String password, String ftpUrl, String fileUrl, HttpServletResponse response) { InputStream isr = null; OutputStream out = null; URL u = null; try { if ((fileUrl != null) && !"".equals(fileUrl)) { response.setHeader("Content-Type", "image/png"); //response.setContentType("image/*"); // 設置返回的文件類型 out = response.getOutputStream(); StringBuffer sb = new StringBuffer("ftp://"); sb.append(username + ":"); sb.append(password + "@"); sb.append(ftpUrl + "/" + fileUrl); u = new URL(sb.toString()); URLConnection urlconn = u.openConnection(); isr = urlconn.getInputStream(); int len = urlconn.getContentLength(); int i = len; int c; while (((c = isr.read()) != -1) && (--i > 0)) { out.write(c); } log.info("獲取ftp圖片" + fileUrl); } else { log.warn("所要顯示的圖片路徑爲空"); } } catch (Exception e) { log.error(e.getMessage()); } finally { try { if (isr != null) { isr.close(); } if (out != null) { out.close(); } } catch (IOException e) { log.error(e.getMessage()); } } } }