/**
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* 查找图片地址
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*/
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package kernel.util;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.Properties;
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import javax.servlet.FilterChain;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import kernel.springframework.ServiceLocator;
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/**
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* @author cwj
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*/
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public class ImageDispatcher {
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private static boolean startUp;
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private static String saveDir;
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private static List viewDirs;
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//查找缩略图 但是原图片不存在！
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private static Map<String, String> noFindImgZoom ;
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private static List noFindImgZoomNeed =new ArrayList();
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private static List noFindImgZoomSupply=new ArrayList() ;
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private static Properties properties = PropertiesLoaderUtils.loadProperties("config/system.properties");
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//查找图片， 但原图片不存在！
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private static Map<String, String> noFindImg;
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private static Map<String,String> noFindPerson;
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public static String getSaveDir() {
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return saveDir;
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}
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public static void setSaveDir(String saveDir) {
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ImageDispatcher.saveDir = saveDir;
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}
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public static boolean isStartUp() {
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return startUp;
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}
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public static void setStartUp(String startUp) {
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if ("true".equals(startUp)) {
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ImageDispatcher.startUp = true;
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} else {
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ImageDispatcher.startUp = false;
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}
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}
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public static List getViewDirs() {
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return viewDirs;
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}
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public static void setViewDirs(List viewDirs) {
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ImageDispatcher.viewDirs = viewDirs;
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}
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/**
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* 响应客户端请求的图片的过滤器处理过程
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* @param request
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* @param response
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* @param filterChain
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* @throws IOException
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* @throws ServletException
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*/
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public static void doImageFilter(ServletRequest request, ServletResponse response,
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FilterChain filterChain) throws IOException, ServletException {
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HttpServletRequest httpReq = (HttpServletRequest) request;
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HttpServletResponse httpResp = (HttpServletResponse) response;
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String reqStr = httpReq.getServletPath();
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FileInputStream imgStream = null;
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OutputStream toClientStream = null;
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try {
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File file = findFile(reqStr);
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if (file != null) {
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imgStream = new FileInputStream(file);
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int i = imgStream.available(); //得到文件大小
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httpResp.setContentType("image/*"); //设置文件类型
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httpResp.setContentLength(i); //设置文件大小
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toClientStream = httpResp.getOutputStream(); //得到输出流
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byte data[] = new byte[1024];
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//逐步输出数据
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while( (i = imgStream.read(data)) > 0){
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toClientStream.write(data,0,i);
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toClientStream.flush();
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}
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} else {
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filterChain.doFilter(request, response);
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}
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} catch(IOException e) {
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throw e;
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} finally {
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if (toClientStream != null) {
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toClientStream.close();
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}
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if (imgStream != null) {
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imgStream.close();
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}
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}
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}
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/**
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* 从数据库中得到图片地址
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* @param filePath /img/2007/10/18/15/T3NHUG4MRO1D.jpg
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* @param type 1,2,3
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* @return
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*/
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public static String getImg(String filePath) {
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String imgPath = "";
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if(!StringUtils.isNullOrEmpty(filePath)&&filePath.indexOf("http://")!=-1){
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return filePath;
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}
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if (filePath == null) {
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// if (noFindImg == null || noFindImg.isEmpty()) {
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// noFindImg = new HashMap<String, String>();
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// noFindImg.put("1", "../sysImg/no-find-1.jpg");
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// noFindImg.put("2", "../sysImg/no-find-2.jpg");
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// noFindImg.put("3", "../sysImg/no-find-3.jpg");
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// }
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// imgPath = noFindImg.get(type);
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// return imgPath;
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return null;
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}
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File file = ImageDispatcher.findFile(filePath);
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if (file == null) {
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//原图片不存在！
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return null;
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} else {
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imgPath = ServiceLocator.getMessage("http.server.host") + filePath;
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}
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return imgPath;
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}
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/**
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* 根据相对路径查找真实路径,如果不存在返回空
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* @return
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*/
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public static File findFile(String absPath) {
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File file = null;
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if (startUp && saveDir != null) {
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file = new File(saveDir + absPath);
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if (file.isFile()) {
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return file;
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} else if (viewDirs != null) {
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for (Iterator it = viewDirs.iterator(); it.hasNext(); ) {
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file = new File((String)it.next() + absPath);
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if (file.isFile()) {
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return file;
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}
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}
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}
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} else {
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file = new File(properties.getProperty("images.dir") + absPath);
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if (file.isFile()) {
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return file;
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}
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}
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return null;
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}
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public static Map<String, String> getNoFindImgZoom() {
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return noFindImgZoom;
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}
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public static void setNotFindImgZoom(Map<String, String> noFindImgZoom) {
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ImageDispatcher.noFindImgZoom = noFindImgZoom;
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}
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public static Map<String, String> getNoFindImg() {
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return noFindImg;
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}
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public static void setNoFindImg(Map<String, String> noFindImg) {
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ImageDispatcher.noFindImg = noFindImg;
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}
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/**
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* 删除一张原图
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* @param filePath
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*/
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public static void delFile(String filePath){
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File file = findFile(filePath);
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if(file != null){
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file.delete();
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}
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}
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public static void main(String[] args) {
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// //System.out.println(ImageDispatcher.getNotImage());2007/10/18/15/T3NHUG4MRO1D.jpg
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// //System.out.println(ImageDispatcher.getImgZoom("", "2"));
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// //System.out.println(ImageDispatcher.getImg("", "2"));
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ImageDispatcher.delFile("2007/10/18/20/PT517L1U6841.jpg");
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}
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public static List getNoFindImgZoomNeed() {
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return noFindImgZoomNeed;
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}
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public static void setNoFindImgZoomNeed(List noFindImgZoomNeed) {
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ImageDispatcher.noFindImgZoomNeed = noFindImgZoomNeed;
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}
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public static List getNoFindImgZoomSupply() {
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return noFindImgZoomSupply;
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}
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public static void setNoFindImgZoomSupply(List noFindImgZoomSupply) {
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ImageDispatcher.noFindImgZoomSupply = noFindImgZoomSupply;
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}
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}
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