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JSP页面上显示磁盘上(例如E盘)的图片

www.MyException.Cn  网友分享于:2014-08-06  浏览:1次
JSP页面上显示磁盘上(比如E盘)的图片
JSP页面:
<img src="<%=request.getContextPath()%>/DisplayFile?filename=${contentVO.firstImage}" 
	                                  alt="" width="164" height="124" border="0" class="thumb_img" 
	                                  rel="${ctx}/view.do?method=view&id=${contentVO.id}" 
	                                  link="${ctx}/view.do?method=view&id=${contentVO.id}"/>



servlet

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * 
 * @author 461245 sgh
 *
 */
public class DisplayFile extends HttpServlet {
	protected static final Log log = LogFactory.getLog(ContentAction.class);
    /**
     * Default constructor.
     */
    public DisplayFile() {
        super();
    }


    public void init() throws ServletException {
        return;
    }


    public void service(HttpServletRequest request,
                        HttpServletResponse response)
            throws ServletException, IOException {

    	ServletUtilities servletUtilities=new ServletUtilities();
        HttpSession session = request.getSession();
        String filename = request.getParameter("filename");
        String type = request.getParameter("type");
        String model = request.getParameter("model");
        
        if("URL".equals(model)){
        	filename=dealFileName(request,filename);
        	servletUtilities.sendHTML(filename, response);
        	return ;
        }
        if (filename == null) {
        	log.error(new ServletException("Parameter 'filename' must be supplied"));

        }
        if (filename.equals("")) {
        	log.error(new ServletException("Parameter 'filename' must be supplied"));

        }        
        String path="";
        if(null!=type&&"xml".equals(type)){
        	path=Config.getConfigFilesPath();
        }else{
        	path=Config.getFilepath();
        }
        
        servletUtilities.sendTempFile(new java.io.File(path+"/"+filename), response);
        
        return;
    }

	private String dealFileName(HttpServletRequest request, String filename) {

		String reString = "";
		reString = filename;
		int pos=filename.indexOf(".");
		String type=Util.getFileSuffixName(filename);
		if(type==null) return reString;
		if(pos+type.length()==filename.length()){
			String path = request.getContextPath();
			reString = path + "/DisplayFile?filename=" + filename;
		}

    	return reString;
    }

}



工具类:

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.dom4j.Document;


public class ServletUtilities {

	protected static final Log log = LogFactory.getLog(ContentAction.class);
	public  void sendTempFile(File file, HttpServletResponse response)
			throws IOException {

		String mimeType = null;
		String filename = file.getName();
		String suffixName=Util.getFileSuffixName(filename);
		if (".xml".equalsIgnoreCase(suffixName)){
			sendXML(file,response);
			return ;
		}
		if(".jpeg".equalsIgnoreCase(suffixName)||
		   ".jpg".equalsIgnoreCase(suffixName)||
			".jpe".equalsIgnoreCase(suffixName)) mimeType = "image/jpeg";
		if(".png".equalsIgnoreCase(suffixName)) mimeType = "image/png";
		if(".gif".equalsIgnoreCase(suffixName)) mimeType = "image/gif";
		if(".qt".equalsIgnoreCase(suffixName)||
			".mov".equalsIgnoreCase(suffixName)) mimeType = "video/quicktime";
		if(".mpeg".equalsIgnoreCase(suffixName)||
		    ".mpg".equalsIgnoreCase(suffixName)||
			".mpe".equalsIgnoreCase(suffixName)) mimeType = "video/mpeg";
		if(".mpv2".equalsIgnoreCase(suffixName)||
		    ".mp2v".equalsIgnoreCase(suffixName)) mimeType = "video/mpeg-2";
		if(".avi".equalsIgnoreCase(suffixName)) mimeType = "video/x-msvideo";
		if(".rm".equalsIgnoreCase(suffixName)) mimeType = "audio/x-pn-realaudio";
		if(".rmvb".equalsIgnoreCase(suffixName)) mimeType = "application/vnd.rn-realmedia-vbr";
		if(".swf".equalsIgnoreCase(suffixName)) mimeType = "application/x-shockwave-flash";
		if(".3gp".equalsIgnoreCase(suffixName)) mimeType = "video/3gpp";
		if(".amr".equalsIgnoreCase(suffixName)) mimeType = "audio/amr";
		if(".mp3".equalsIgnoreCase(suffixName)) mimeType = "audio/mpeg";
		if(".mp4".equalsIgnoreCase(suffixName)) mimeType = "video/mp4";

		if (null == mimeType)
			mimeType = "text/html";
		sendTempFile(file, response, mimeType);
	
	}
	public  void sendXML(File file,HttpServletResponse response) throws IOException {
		Document doc=Util.loadXML(file);
		String repStr =doc.asXML();// new String(doc.asXML().getBytes(), "GBK");

		if (repStr != null) {

			response.setContentType("text/xml;charset=GBK");
			response.setHeader("Pragma", "no-cache");
			response.setHeader("Cache-Control", "no-cache");
			response.setStatus(HttpServletResponse.SC_OK);
			response.getWriter().print(repStr);
		}

	}

	/**
	 * Binary streams the specified file to the HTTP response in 1KB chunks.
	 * 
	 * @param file
	 *            the file to be streamed.
	 * @param response
	 *            the HTTP response object.
	 * @param mimeType
	 *            the mime type of the file, null allowed.
	 * 
	 * @throws IOException
	 *             if there is an I/O problem.
	 */
	public  void sendTempFile(File file, HttpServletResponse response,
			String mimeType) throws IOException {

		if(!file.isFile()){
			log.error(new Exception(file.getName()+"is not a file"));
			return ;
		}
		if (file.exists()) {
			BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));

			// Set HTTP headers
			if (mimeType != null) {
				response.setHeader("Content-Type", mimeType);
			}
			
			response.setHeader("Content-Length", String.valueOf(file.length()));
			response.setCharacterEncoding("GBK");
			BufferedOutputStream bos = new BufferedOutputStream(
					response.getOutputStream());
			byte[] input = new byte[1024];
			boolean eof = false;
			while (!eof) {
				int length = bis.read(input);
				if (length == -1) {
					eof = true;
				} else {
					bos.write(input, 0, length);
				}
			}
			bos.flush();
			bis.close();
			bos.close();
		} else {
			throw new FileNotFoundException(file.getAbsolutePath());
		}
		return;
	}

	public  void sendHTML(String src, HttpServletResponse response) throws IOException {

		StringBuffer html=new StringBuffer();

		Displayer displayer=new Displayer();
		try {
			html=displayer.excute(src);
		} catch (Exception e) {
			log.error(e);
		}
		response.setHeader("Content-Type", "text/html");
		response.setHeader("Content-Length",Integer.toString(html.length()) );
		response.setCharacterEncoding("GBK");
		ByteArrayInputStream bais=new ByteArrayInputStream(html.toString().getBytes()); 
		BufferedOutputStream bos = new BufferedOutputStream(response.getOutputStream());
		byte[] input = new byte[1024];
		boolean eof = false;
		while (!eof) {
			int length = bais.read(input);
			if (length == -1) {
				eof = true;
			} else {
				bos.write(input, 0, length);
			}
		}
		bos.flush();
		bais.close();
		bos.close();

		return;
	}
}

import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

public class Config {
	public static Properties props = new Properties();

  	public static void load() throws Exception {
		props = Util.parse("config.xml", new ConfigHandler());
		try{
		String[] imgs=getImage().split(","); 
		for (String str : imgs) {
			img.put(str, str);
		}
		
		String[] musics=getMusic().split(","); 
		for (String str : musics) {
			music.put(str, str);
		}
		String[] movies=getMovie().split(","); 
		for (String str : movies) {
			movie.put(str, str);
		}
		String[] roles=getRole().split(","); 
		for (String str : roles) {
			role.put(str, str);
		}
		
		}catch(Exception e){
			
		}
	
		
	}

	public static String getFilepath() {
		return props.getProperty("filepath"); 
	}
	public static String getConfigFilesPath() {
		return props.getProperty("configfilespath"); 
	}
	public static String getMenuNodes() {
		return props.getProperty("menunodes"); 
	}
	public static String getWorkflow() {
		return props.getProperty("workflow"); 
	}
	
	public static String getDriverClassName() {
		return props.getProperty("driverclassname"); 
	}
	public static String getJdbcUrl() {
		return props.getProperty("jdbcurl"); 
	}
	public static String getJdbcUsername() {
		return props.getProperty("jdbcusername"); 
	}
	public static String getJdbcPassword() {
		return props.getProperty("jdbcpassword"); 
	}	
	public static String getImage() {
		return props.getProperty("img"); 
	}
	public static String getMovie() {
		return props.getProperty("movie"); 
	}
	public static String getMusic() {
		return props.getProperty("music"); 
	}
	public static String getFtpHostName() {
		return props.getProperty("ftphostname"); 
	}
	public static String getFtpPort() {
		return props.getProperty("ftpport"); 
	}
	public static String getFtpUserName() {
		return props.getProperty("ftpusername"); 
	}
	public static String getFtpPassword() {
		return props.getProperty("ftppassword"); 
	}
	public static String get() {
		return props.getProperty("ftpremotepath"); 
	}	
	public static String getFtpRemotePath() {
		return props.getProperty("ftpremotepath"); 
	}	
	public static String getRole(){
		return props.getProperty("role");
	}
	public static String getCPID() {
		return props.getProperty("cpid"); 
	}	
	public static String getServiceID() {
		return props.getProperty("serviceid"); 
	}	
	public static String getSourceID() {
		return props.getProperty("sourceid"); 
	}
	public static String getFileSubmitRequestURL() {
		return props.getProperty("filesubmitrequesturl"); 
	}
	
	public static Map<String,String> role=new HashMap<String,String>();
	public static Map<String,String> img=new HashMap<String,String>();
	public static Map<String,String> movie=new HashMap<String,String>();
	public static Map<String,String> music=new HashMap<String,String>();
	public static void main(String[] args) {
		try {
		 	TreeConfig.load();
		 	Map<String,Tree> nodes=TreeConfig.nodes;
		 	
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}


import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.apache.commons.beanutils.DynaBean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;


public class Util {
	public static final String GBK = "GBK";
	public static final String FORMAT_DAT_01="yyyy年MM月dd日 HH点mm分";
	public static final String FORMAT_DAT_02="yyyy-MM-dd";
	public static final String FORMAT_DAT_03="yyyyMMdd";
	public static final String FORMAT_DAT_04="yyyy-MM-dd HH:mm";
	protected static final Log log = LogFactory.getLog(Util.class);
	public static InputStream getConfigFile(String filename) throws Exception {
		ClassLoader loader = Thread.currentThread().getContextClassLoader();
		URL url = loader.getResource(filename);
		return url.openStream();
	}

	public static String format(Date date, String format){
		SimpleDateFormat f=new SimpleDateFormat(format);
		return f.format(date);
	}
	public static Map<String, Task> parse(String filename) throws Exception {

		WorkFlowHandler definedWorkFlowHandler = new WorkFlowHandler();
		SAXParserFactory factory = SAXParserFactory.newInstance();
		factory.setNamespaceAware(false);
		factory.setValidating(false);
		SAXParser parser = factory.newSAXParser();
		parser.parse(getConfigFile(filename), definedWorkFlowHandler);
		return definedWorkFlowHandler.getTasks();
	}
	public static Map<String, Task> parse(StringBuffer xml,WorkFlowHandler definedWorkFlowHandler) throws Exception {

		SAXParserFactory factory = SAXParserFactory.newInstance();
		factory.setNamespaceAware(false);
		factory.setValidating(false);
		SAXParser parser = factory.newSAXParser();
		InputStream inputStream = new ByteArrayInputStream(xml.toString().getBytes());
		parser.parse(inputStream, definedWorkFlowHandler);
		return definedWorkFlowHandler.getTasks();
	}
	public static Properties parse(String filename, ConfigHandler handle)
			throws Exception {

		SAXParserFactory factory = SAXParserFactory.newInstance();
		factory.setNamespaceAware(false);
		factory.setValidating(false);
		SAXParser parser = factory.newSAXParser();
		parser.parse(getConfigFile(filename), handle);
		return handle.getProps();

	}

	public static Map<String, Tree> parse(String filename, TreeHandler handle)
			throws Exception {

		SAXParserFactory factory = SAXParserFactory.newInstance();
		factory.setNamespaceAware(false);
		factory.setValidating(false);
		SAXParser parser = factory.newSAXParser();
		parser.parse(getConfigFile(filename), handle);
		arrange(handle.getAll2());
		return handle.getNodes();

	}

	public static Map<String, Tree> parseAndArrange(StringBuffer xml, TreeHandler handle)
			throws Exception {
		SAXParserFactory factory = SAXParserFactory.newInstance();
		factory.setNamespaceAware(false);
		factory.setValidating(false);
		SAXParser parser = factory.newSAXParser();
		InputStream inputStream = new ByteArrayInputStream(xml.toString().getBytes());
		parser.parse(inputStream, handle);
		arrange(handle.getAll2());
		return handle.getNodes();

	}
	public static Map<String, Tree> parse(StringBuffer xml, TreeHandler handle)
			throws Exception {
		SAXParserFactory factory = SAXParserFactory.newInstance();
		factory.setNamespaceAware(false);
		factory.setValidating(false);
		SAXParser parser = factory.newSAXParser();
		InputStream inputStream = new ByteArrayInputStream(xml.toString().getBytes());
		parser.parse(inputStream, handle);
		return handle.getNodes();

	}

	public static Map<String, Area> parse(String filename, CacheHandler handle)
			throws Exception {

		SAXParserFactory factory = SAXParserFactory.newInstance();
		factory.setNamespaceAware(false);
		factory.setValidating(false);
		SAXParser parser = factory.newSAXParser();
		parser.parse(getConfigFile(filename), handle);
		return handle.getAreas();

	}

	public static Map<String, Viewer> parse(String filename, DisplayerHandler handle)
			throws Exception {

		SAXParserFactory factory = SAXParserFactory.newInstance();
		factory.setNamespaceAware(false);
		factory.setValidating(false);
		SAXParser parser = factory.newSAXParser();
		parser.parse(getConfigFile(filename), handle);
		return handle.getViewers();

	}
	
	private static void arrange(List<Tree> nodes) {
		int i = 0;
		for (Tree tree : nodes) {
			Map<String, Tree> childs = new HashMap<String, Tree>();
			for (int j = i + 1; j < nodes.size(); j++) {
				Tree temp = nodes.get(j);
				if (tree.getId().equals(temp.getId())) {
					Set<String> keys = childs.keySet();
					for (String key : keys) {
						tree.getChildeNodes().add(childs.get(key));
					}
					break;
				}
				if (childs.get(temp.getId()) == null)
					childs.put(temp.getId(), temp);
			}
			i++;
		}
	}


	public static String toGBK(String str) throws UnsupportedEncodingException {
		return changeCharset(str, GBK);
	}

	public static String changeCharset(String str, String newCharset)
			throws UnsupportedEncodingException {
		if (str != null) {
			// 用默认字符编码解码字符串。
			byte[] bs = str.getBytes();
			// 用新的字符编码生成字符串
			return new String(bs, newCharset);
		}
		return null;
	}

	public static String changeCharset(String str, String oldCharset,
			String newCharset) throws UnsupportedEncodingException {
		if (str != null) {
			// 用旧的字符编码解码字符串。解码可能会出现异常。
			byte[] bs = str.getBytes(oldCharset);
			// 用新的字符编码生成字符串
			return new String(bs, newCharset);
		}
		return null;
	}

	public static Object readObject(String fileName) throws Exception {
		Object obj=null;
		InputStream is=null;
		ObjectInputStream ois=null;
		try{
			 is = new FileInputStream(fileName);
			 ois = new ObjectInputStream(is);
			 obj=ois.readObject();
		}finally{
			if(ois!=null) ois.close();
			if(is!=null) is.close();
		}
		return obj;
	}

	public static void writeObject(String filename, Object o) throws Exception {
		FileOutputStream os = null;
		ObjectOutputStream oos = null;
		try {
			File f = new File(filename);
			if (f.exists()) {
				f.delete();
			}
			os = new FileOutputStream(f);
			oos = new ObjectOutputStream(os);
			oos.writeObject(o);

		} finally {
			if (oos != null)
				oos.close();
			if (os != null)
				os.close();
		}
	}

	/**
	 * 序列化list<Object>到文件
	 * 
	 * @param rsls
	 * @param filename
	 */
	public static void writeObjToFile(List<Object> rsls, String filename)
			throws Exception {
		ByteArrayOutputStream baos = null;
		ObjectOutputStream oos = null;
		OutputStream os = null;
		try {
			baos = new ByteArrayOutputStream();
			oos = new ObjectOutputStream(baos);
			Iterator item = rsls.iterator();
			while (item.hasNext()) {
				Object obj = item.next();
				oos.writeObject(obj);
			}
			byte[] data = baos.toByteArray();
			os = new FileOutputStream(new File(filename));
			os.write(data);
			os.flush();
		} finally {

			if (os != null)
				os.close();
			if (oos != null)
				oos.close();
			if (baos != null)
				baos.close();
		}
	}

	/**
	 * 从序列化文件中读取、并对象化
	 * 
	 * @param filename
	 * @return
	 */
	public static List<Object> readObjFromFile(String filename)
			throws Exception {
		
		List<Object> rsls = new ArrayList<Object>();
		FileInputStream fis = null;
		ObjectInputStream ois = null;
		try {
			fis = new FileInputStream(filename);
			ois = new ObjectInputStream(fis);
			while (fis.available() > 0) {
				rsls.add(ois.readObject());
			}
		} finally {
			if(ois!=null) ois.close();
			if(fis!=null) fis.close();
		}
		return rsls;
	}



	public static String getFileSuffixName(String filename) {
		if (filename == null)
			return null;
		if (filename.indexOf(".") < 0)
			return "";
		return filename.substring(filename.lastIndexOf("."));
	}

	public static List<FileVO> getFileList(String extend) throws Exception {

		List<FileVO> fileList = new ArrayList<FileVO>();
		String ex=extend.replaceAll("&", "%=26%");
		Document document = DocumentHelper.parseText(ex);
		List<Element> list = document.getRootElement().elements();

		for (int i = 0; i < list.size(); i++) {
			FileVO file = new FileVO();
			file.setSrc(list.get(i).attribute("src").getValue());
			file.setSrc(file.getSrc().replaceAll("%=26%", "&"));
			file.setType(list.get(i).attribute("type").getValue());
			file.setOrder(list.get(i).attribute("order").getValue());
			file.setFirst(list.get(i).attribute("first").getValue());
			try{file.setMode(list.get(i).attribute("mode").getValue());}catch(Exception e){}
			try{file.setFilename(list.get(i).attribute("filename").getValue());}catch(Exception e){}
			try{file.setHignDefinition(list.get(i).attribute("higndefinition").getValue());}catch(Exception e){}
			try{file.setFilesize(Integer.parseInt(list.get(i).attribute("filesize").getValue()));}catch(Exception e){}
			
			fileList.add(file);
		}
		return fileList;
	}

	public static boolean doc2XmlFile(Document document, String filename) {
		boolean flag = true;
		try {
			/* 将document中的内容写入文件中 */
			// 默认为UTF-8格式,指定为"GB2312"
			OutputFormat format = OutputFormat.createPrettyPrint();
			format.setEncoding(GBK);
			XMLWriter writer = new XMLWriter(new FileWriter(new File(filename)), format);
			writer.write(document);
			writer.close();
		} catch (Exception ex) {
			flag = false;
			log.error(ex);
		}
		return flag;
	}

	public static Document loadXML(File file) {
		Document document = null;
		try {
			SAXReader saxReader = new SAXReader();
			document = saxReader.read(file);
		} catch (Exception ex) {
			log.error(ex);
		}
		return document;
	}

	public static String dateToStr(Date date,String f) {

		if(date==null) return "";
		SimpleDateFormat format = new SimpleDateFormat(f);
		String str = format.format(date);
		return str;
	}

	/**
	 * 
	 * @param str
	 * @return date
	 */
	public static Date strToDate(String str, String f) {

		SimpleDateFormat format = new SimpleDateFormat(f);
		Date date = null;
		try {
			date = format.parse(str);
		} catch (ParseException e) {
			log.error(e);
		}
		return date;
	}

	public static java.sql.Date strToSQLDate(Object obj, String f) {
		
		if(obj==null) return null;
		String str=(String)obj;
		Date sDate = strToDate(str, f);
		if(sDate==null) return null;
		return new java.sql.Date(sDate.getTime());
	}
	public static java.sql.Timestamp strToSQLTimestamp(Object obj, String f) {
		
		if(obj==null) return null;
		String str=(String)obj;
		Date sDate = strToDate(str, f);
		if(sDate==null) return null;
		return new java.sql.Timestamp(sDate.getTime());
	}
	public static String getValueFormDynaBean(DynaBean dynaBean,String name){
		String reString="";
		Object tmp=dynaBean.get(name);
		if(null!=tmp)
			reString=tmp.toString();
		return reString;
	}	
}



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为什么程序员都是夜猫子
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亲爱的项目经理,我恨你
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我是如何打败拖延症的
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“肮脏的”IT工作排行榜
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不懂技术不要对懂技术的人说这很容易实现
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什么才是优秀的用户界面设计
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5款最佳正则表达式编辑调试器
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代码女神横空出世
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如何区分一个程序员是“老手“还是“新手“?
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做程序猿的老婆应该注意的一些事情
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Web开发者需具备的8个好习惯
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程序员最害怕的5件事 你中招了吗?
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2013年中国软件开发者薪资调查报告
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程序员必看的十大电影
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科技史上最臭名昭著的13大罪犯
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程序员周末都喜欢做什么?
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程序员都该阅读的书
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每天工作4小时的程序员
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编程语言是女人
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“懒”出效率是程序员的美德
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中美印日四国程序员比较
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Java程序员必看电影
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十大编程算法助程序员走上高手之路
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Google伦敦新总部 犹如星级庄园
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老程序员的下场
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60个开发者不容错过的免费资源库
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Web开发人员为什么越来越懒了?
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如何成为一名黑客
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团队中“技术大拿”并非越多越好
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我的丈夫是个程序员
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10个调试和排错的小建议
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程序员眼里IE浏览器是什么样的
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Java 与 .NET 的平台发展之争
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程序员的一天:一寸光阴一寸金
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旅行,写作,编程
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老美怎么看待阿里赴美上市
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为啥Android手机总会越用越慢?
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鲜为人知的编程真相
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总结2014中国互联网十大段子
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程序员的鄙视链
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那些性感的让人尖叫的程序员
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初级 vs 高级开发者 哪个性价比更高?
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聊聊HTTPS和SSL/TLS协议
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那些争议最大的编程观点
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