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    posts - 27,comments - 2,trackbacks - 0
    做個(gè)總結(jié)
    linux服務(wù)器上做負(fù)載均衡
    自己準(zhǔn)備的:linux服務(wù)器(45.78.20.168),jdk1.7,nginx,redis,tomcat7兩個(gè),部署的項(xiàng)目;

    1:jdk1.7安裝,兩個(gè)tomcat分別端口8080,8081;部署相同的項(xiàng)目;啟動(dòng);
        http://45.78.20.168:8080/redis3.2/getRedis.action
        http://45.78.20.168:8081/redis3.2/getRedis.action
    2:安裝nginx,添加負(fù)載的配置,安裝目錄下找 /etc/nginx/conf.d/default.conf文件(或/etc/nginx/nginx.conf);策略設(shè)置為默認(rèn)輪詢;
        upstream www.nimenhaihaoma.com {
            server 45.78.20.168:8080;
            server 45.78.20.168:8081;
        }
        server{
            listen 80;
            server_name www.nimenhaihaoma.com;
            location / {
                proxy_pass http://www.nimenhaihaoma.com;
                proxy_set_header Host $host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            }
    3:配置session共享,方式很多,這里用的redis的session共享(兼容jdk版本至少1.7):
        tomcat的lib包加commons-pool2-2.0.jar,jedis-2.5.2.jar,tomcat-redis-session-manager1.2.jar;
        tomcat配置文件context.xml,在標(biāo)簽<Context>內(nèi)添加配置:
            <Valve className="com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve" />
            <Manager className="com.orangefunction.tomcat.redissessions.RedisSessionManager" host="localhost" port="6379" database="0" maxInactiveInterval="60" />

    4:項(xiàng)目里面區(qū)分session的代碼:
        (1):放session的接口(執(zhí)行一次);
        (2):取session數(shù)據(jù)(不斷刷新),看tomcat打印信息;
    5:效果,http://www.nimenhaihaoma.com/redis3.2/getRedis.action (狂刷session值相同)



    posted @ 2016-08-17 17:03 魏文甫 閱讀(122) | 評(píng)論 (0)編輯 收藏
    項(xiàng)目只是加載spring的幾個(gè)定時(shí)任務(wù),啟動(dòng)服務(wù)一直循環(huán)加載spring文件,問(wèn)題的根節(jié)點(diǎn):定時(shí)器類里面的service對(duì)象采取配置的方式注入,而這個(gè)定時(shí)器類的構(gòu)造讓我給加上了:
    ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext*.xml");
    myServiceImpl = context.getBean("XXXService");

    加上這段為了方便測(cè)試,在該類里寫main方法測(cè)試執(zhí)行,把調(diào)用寫到構(gòu)造里;,spring定時(shí)器配置好時(shí)間后,此處構(gòu)造忘了去掉;導(dǎo)致啟動(dòng)tomcat服務(wù)一直在加載spring注入文件;
    同理,spring注入的方式,在action里同樣有這樣的效果,構(gòu)造方法一定注意;
    posted @ 2015-04-25 11:09 魏文甫 閱讀(178) | 評(píng)論 (0)編輯 收藏
    是在build.xml編譯的時(shí)候,包里有兩個(gè)類名一樣的java文件,我只是做了個(gè)備份,忘了改文件后綴,備份的文件也編譯了,所以報(bào)的這個(gè)錯(cuò)
    posted @ 2014-08-28 20:18 魏文甫 閱讀(840) | 評(píng)論 (0)編輯 收藏
    1,添加索引文件中的一條新的索引     
                    Question addQ = new Question();//新添加的一條數(shù)據(jù),對(duì)象id在索引文件中沒有
                    addQ.setId("999999999");
                    addQ.setQuestionname("新添加的一條數(shù)據(jù)名稱");
                    Analyzer sa = new SmartChineseAnalyzer(Version.LUCENE_40);
    IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_40, sa);
    iwc.setOpenMode(OpenMode.APPEND);
    IndexWriter writer = null;
    try {
    Directory dir1 = FSDirectory.open(new File("F:\\temp"));
    writer = new IndexWriter(dir1, iwc);
    FieldType ft = new FieldType();
    ft.setIndexed(true);
    ft.setStored(true);
    ft.setTokenized(true);
    FieldType ft2 = new FieldType();
    ft2.setIndexed(true);
    ft2.setStored(true);
    ft2.setTokenized(false);
    Document doc = new Document();
    doc.add(new Field("id", addQ.getId(), ft2));
    doc.add(new Field("questionname", addQ.getQuestionname(), ft));
    writer.addDocument(doc);
    writer.close();
    } catch (CorruptIndexException e) {
    e.printStackTrace();
    } catch (LockObtainFailedException e) {
    e.printStackTrace();
    } catch (IOException e) {
    e.printStackTrace();
    } finally{
    try {
    if(writer!=null){
    writer.close();
    }
    if(sa!=null){
    sa.close();
    }
    } catch (CorruptIndexException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }
    }
    執(zhí)行完程序后,索引文件中已經(jīng)添加新的索引數(shù)據(jù)。
    2,刪除索引文件中的一條新的索引
                    Question delQ = new Question();//索引文件中有的一條數(shù)據(jù),根據(jù)對(duì)象id刪
                    delQ.setId("1111111");
                    delQ.setQuestionname("要?jiǎng)h除的一條數(shù)據(jù)");
                    IndexWriter writer = null;
    Analyzer sa = new SmartChineseAnalyzer(Version.LUCENE_40);
    IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_40, sa);
    Directory dir1 = null;
    try {
    dir1 = FSDirectory.open(new File("F:\\temp"));
    writer = new IndexWriter(dir1, iwc);
    Term term = new Term("id", delQ.getId());
    writer.deleteDocuments(term);
    writer.commit();
    writer.close();
    } catch (CorruptIndexException e) {
    e.printStackTrace();
    } catch (LockObtainFailedException e) {
    e.printStackTrace();
    } catch (IOException e) {
    e.printStackTrace();
    } finally {
    try {
    if (writer != null) {
    writer.close();
    sa.close();
    }
    } catch (CorruptIndexException e) {
    e.printStackTrace();
    } catch (IOException e) {
    e.printStackTrace();
    }
    }
    System.out.println("索引刪除完成");
    3,更新索引文件中的一條索引
    更新索引文件中的一條索引的理念是:先找到這條索引刪除,然后再添加這條更新后的索引


    posted @ 2013-08-16 12:08 魏文甫 閱讀(341) | 評(píng)論 (0)編輯 收藏
                    IndexReader reader = DirectoryReader.open(FSDirectory.open(new File("F:\\temp")));// 打開索引
    IndexSearcher searcher = new IndexSearcher(reader);
    Analyzer analyzer = new SmartChineseAnalyzer(Version.LUCENE_40);
    String[] fields = { "questionname","id" };
    Occur[] occurs = new Occur[] { Occur.SHOULD,Occur.SHOULD };
    Query query =  MultiFieldQueryParser.parse(Version.LUCENE_40, "測(cè)試 的", fields,
    occurs, analyzer);
    TopDocs result = searcher.search(query, searcher.getIndexReader()
    .maxDoc());
    ScoreDoc[] hits = result.scoreDocs;
    List<Document> list = new ArrayList<Document>();
    for (int i = 0; i <hits.length; i++) {
    Document doc = searcher.doc(hits[i].doc);
    list.add(doc);
    }
    System.out.println("搜索list的長(zhǎng)度\t→→→→\t"+list.size());
    for (Document document : list) {
    System.out.println(document.getField("questionname"));
    }
    analyzer.close();

    注:紅色字體是輸入的檢索條件,多個(gè)用空格隔開,找到的結(jié)果先匹配同時(shí)符合多個(gè)的結(jié)果,結(jié)果只是拿過(guò)來(lái)的document一個(gè)list集合,具體結(jié)果再解析就行了。

    結(jié)果如圖:
    posted @ 2013-08-12 17:26 魏文甫 閱讀(1175) | 評(píng)論 (1)編輯 收藏
                    Connection conn = null;
    Statement stat = null;
    ResultSet rs = null;
    Analyzer sa = new SmartChineseAnalyzer(Version.LUCENE_40);
    IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_40, sa);
    iwc.setOpenMode(OpenMode.CREATE);
    Directory dir1 = FSDirectory.open(new File("F:\\temp"));
    IndexWriter writer = new IndexWriter(dir1, iwc);
    int numIndexed = -1;
    FieldType ft = new FieldType();
    ft.setIndexed(true);
    ft.setStored(true);
    ft.setTokenized(true);
    FieldType ft2 = new FieldType();
    ft2.setIndexed(true);
    ft2.setStored(true);
    ft2.setTokenized(false);
    Class.forName("com.mysql.jdbc.Driver");
    conn = (Connection) DriverManager.getConnection(
    "jdbc:mysql:///question", "root", "root");
    stat = (Statement) conn.createStatement();
    rs = stat.executeQuery("select id,questionname from question");
    List<String> list = new ArrayList<String>();
    while (rs.next()) {
    String id = rs.getString("questionname");
    String questionname = rs.getString("questionname");
    list.add(id);
    list.add(questionname);
    }
    rs.close();
    stat.close();
    conn.close();
    for (String string : list) {
    Document doc = new Document();
    doc.add(new Field("questionname", string, ft2));
    writer.addDocument(doc);
    }
    numIndexed = writer.maxDoc();
    writer.close();
    執(zhí)行完這段程序f盤多一個(gè)文件夾temp,里面就是創(chuàng)建好的索引文件了,然后進(jìn)行根據(jù)索引文件查詢
    posted @ 2013-08-12 16:50 魏文甫 閱讀(1417) | 評(píng)論 (0)編輯 收藏
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
    <head>
    <meta http-equiv="Content-Type" content="text/html;charset=GBK" />
    <title></title>
    <script type="text/javascript" src="jquery-1.8.2.js"></script>
    <script type="text/javascript">
    $(document).mousemove(function(e) {
    var innerHeight = window.innerHeight;
    if (e.pageY > innerHeight) {
    $("#topDiv").css("display", "block");
    }
    if (e.pageY < innerHeight) {
    $("#topDiv").css("display", "none");
    }
    });
    $("#topIcon").mouseover(function() {
    $("#topIcon").css("text-decoration", "none");
    $("#topIcon").children("i").removeClass();
    $("#topIcon").children("i").addClass("icon-chevron-up");
    });
    $("#topIcon").mouseout(function() {
    $("#topIcon").children("i").removeClass();
    $("#topIcon").children("i").addClass("icon-arrow-up");
    });
    </script>
    </head>
    <body id="bodyId">
    <div id="topDiv"
    style="position: fixed;right: 60px;bottom: 60px;display: none">
    <a id="topIcon" href="#bodyId" style="background-color: #aaaaaa"><span
    style="text-align: justify;display: block;text-decoration: none;width: 14px;background-color: #cccccc">回到頂端</span>
    </a>
    </div>
    <h1>O(∩_∩)O哈哈~</h1>
    <h2>(*^__^*) 嘻嘻……</h2>
    <h3>O(∩_∩)O~</h3>
    <h4>\(^o^)/~</h4>
    <h5>$_$</h5>
    <h6>o(╯□╰)o</h6>
    <h1>O(∩_∩)O哈哈~</h1>
    <h2>(*^__^*) 嘻嘻……</h2>
    <h3>O(∩_∩)O~</h3>
    <h4>\(^o^)/~</h4>
    <h5>$_$</h5>
    <h6>o(╯□╰)o</h6>
    <h1>O(∩_∩)O哈哈~</h1>
    <h2>(*^__^*) 嘻嘻……</h2>
    <h3>O(∩_∩)O~</h3>
    <h4>\(^o^)/~</h4>
    <h5>$_$</h5>
    <h6>o(╯□╰)o</h6>
    <h1>O(∩_∩)O哈哈~</h1>
    <h2>(*^__^*) 嘻嘻……</h2>
    <h3>O(∩_∩)O~</h3>
    <h4>\(^o^)/~</h4>
    <h5>$_$</h5>
    <h6>o(╯□╰)o</h6>
    <h1>O(∩_∩)O哈哈~</h1>
    <h2>(*^__^*) 嘻嘻……</h2>
    <h3>O(∩_∩)O~</h3>
    <h4>\(^o^)/~</h4>
    <h5>$_$</h5>
    <h6>o(╯□╰)o</h6>
    <h1>O(∩_∩)O哈哈~</h1>
    <h2>(*^__^*) 嘻嘻……</h2>
    <h3>O(∩_∩)O~</h3>
    <h4>\(^o^)/~</h4>
    <h5>$_$</h5>
    <h6>o(╯□╰)o</h6>
    <h1>O(∩_∩)O哈哈~</h1>
    <h2>(*^__^*) 嘻嘻……</h2>
    <h3>O(∩_∩)O~</h3>
    <h4>\(^o^)/~</h4>
    <h5>$_$</h5>
    <h6>o(╯□╰)o</h6>
    <h1>O(∩_∩)O哈哈~</h1>
    <h2>(*^__^*) 嘻嘻……</h2>
    <h3>O(∩_∩)O~</h3>
    <h4>\(^o^)/~</h4>
    <h5>$_$</h5>
    <h6>o(╯□╰)o</h6>
    </body>
    </html>
    posted @ 2013-08-07 10:35 魏文甫 閱讀(213) | 評(píng)論 (0)編輯 收藏
    求單一登陸和單點(diǎn)登陸的思路及核心代碼???
    posted @ 2013-08-07 09:56 魏文甫 閱讀(326) | 評(píng)論 (0)編輯 收藏
    html中中文正則表達(dá)式不對(duì)的問(wèn)題 
    中文的正則表達(dá)式:var reg = /^[\u4e00-\u9fa5]$/;(一個(gè)中文字符)
    放在html中可能出現(xiàn)的問(wèn)題有:
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
    <head>
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
    <title></title>
    </head>
    <body>
    <script type="text/javascript">
                var reg0 = /^[\u4e00-\u9fa5]$/;
                alert(reg0.test("看"));
    </script>
    </body>
    </html>
    本頁(yè)編碼為UTF-8時(shí)出現(xiàn)的結(jié)果可能是錯(cuò)誤的,
    所以出現(xiàn)此類情況,編碼格式改為gb2312(紅色標(biāo)注的編碼改為gb2312)
    posted @ 2013-07-29 15:56 魏文甫 閱讀(223) | 評(píng)論 (0)編輯 收藏
    簡(jiǎn)單的代碼:
    public static void main(String[] args) {
    try {
    File allfile = new File("f:\\excel\\total.xlsx");
    File file2 = new File("f:\\excel\\xxxxxx.xlsx");
    XSSFWorkbook h = new XSSFWorkbook(new FileInputStream(allfile));
    XSSFSheet x = h.getSheetAt(0);
    XSSFWorkbook hssfWorkbook = new XSSFWorkbook(new FileInputStream(file2));
    XSSFSheet hssfSheet = hssfWorkbook.getSheetAt(0);
    int ii = hssfSheet.getLastRowNum();//讀取的表格行數(shù)
    System.out.println(ii);
    FileOutputStream out_ = new FileOutputStream(allfile);
    for (int i = 0; i < ii; i++) {
    XSSFRow lastRow = x.createRow(x.getLastRowNum()+1);
    XSSFRow xssfRow = hssfSheet.getRow(i);
    XSSFCell xssfCell0 = xssfRow.getCell(0);
    CellStyle cellStyle0 = xssfCell0.getCellStyle();
    CellStyle newStyle0 = h.createCellStyle();
    newStyle0.cloneStyleFrom(cellStyle0);
    XSSFCell xssfCell0_ = lastRow.createCell(0);
    xssfCell0_.setCellStyle(newStyle0);
    xssfCell0_.setCellValue(xssfCell0.toString());
    XSSFCell xssfCell1 = xssfRow.getCell(1);
    CellStyle cellStyle1 = xssfCell1.getCellStyle();
    CellStyle newStyle1 = h.createCellStyle();
    newStyle1.cloneStyleFrom(cellStyle1);
    XSSFCell xssfCell1_ = lastRow.createCell(1);
    xssfCell1_.setCellStyle(newStyle1);
    xssfCell1_.setCellValue(xssfCell1.toString());
    XSSFCell xssfCell2 = xssfRow.getCell(2);
    CellStyle cellStyle2 = xssfCell2.getCellStyle();
    CellStyle newStyle2 = h.createCellStyle();
    newStyle2.cloneStyleFrom(cellStyle2);
    XSSFCell xssfCell2_ = lastRow.createCell(2);
    xssfCell2_.setCellStyle(newStyle2);
    xssfCell2_.setCellValue(xssfCell2.toString());
    XSSFCell xssfCell3 = xssfRow.getCell(3);
    CellStyle cellStyle3 = xssfCell3.getCellStyle();
    CellStyle newStyle3 = h.createCellStyle();
    newStyle3.cloneStyleFrom(cellStyle3);
    XSSFCell xssfCell3_ = lastRow.createCell(3);
    xssfCell3_.setCellStyle(newStyle3);
    xssfCell3_.setCellValue(xssfCell3.toString());
    XSSFCell xssfCell4 = xssfRow.getCell(4);
    CellStyle cellStyle4 = xssfCell4.getCellStyle();
    CellStyle newStyle4 = h.createCellStyle();
    newStyle4.cloneStyleFrom(cellStyle4);
    XSSFCell xssfCell4_ = lastRow.createCell(4);
    xssfCell4_.setCellStyle(newStyle4);
    xssfCell4_.setCellValue(xssfCell4.toString().toString());
    }
    h.write(out_);
    out_.flush();
    out_.close();
    } catch (FileNotFoundException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }
    }
    posted @ 2013-07-19 18:02 魏文甫 閱讀(635) | 評(píng)論 (0)編輯 收藏
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
    <head>
    <meta http-equiv="Content-Type" content="text/html;charset=GBK" />
    <title></title>
    </head>
    <body>
    <h1>提示離開當(dāng)前頁(yè)面的js代碼</h1>
    <a >百度鏈接</a>
    <script type="text/javascript">
    if (window != top) {
    top.location.href = "login.action";
    } else {
    if (window.Event) {
    window.onbeforeunload = function(event) {
    return "你是否要離開此頁(yè)面,離開此頁(yè)面信息將不被保存!";
    };
    } else {
    window.onbeforeunload = function() {
    return "你是否要離開此頁(yè)面,離開此頁(yè)面信息將不被保存!";
    };
    }
    }
    </script>
    </body>
    </html>
    posted @ 2013-07-18 15:04 魏文甫 閱讀(246) | 評(píng)論 (0)編輯 收藏
    Ajax同步加載數(shù)據(jù)。發(fā)送請(qǐng)求時(shí)鎖住瀏覽器。需要鎖定用戶交互操作時(shí)使用同步方式。 
    $.ajax({
      url: "some.php",
      async: false
     })
    posted @ 2013-07-11 15:48 魏文甫 閱讀(453) | 評(píng)論 (0)編輯 收藏
    String data_ = "2013-07-01 15:47:34";
    SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    Date date = simpleDateFormat.parse(data_);
    格式y(tǒng)yyy-MM-dd HH:mm:ss是24小時(shí)制,yyyy-MM-dd hh:mm:ss是12小時(shí)制。
    posted @ 2013-07-01 15:48 魏文甫 閱讀(194) | 評(píng)論 (0)編輯 收藏
     
          
          /**
    * 得到幾天前的時(shí)間
    * @param d
    * @param day
    * @return
    */
    public static Date getDateOfBefore(Date d, int day) {
    Calendar now = Calendar.getInstance();
    now.setTime(d);
    now.set(Calendar.DATE, now.get(Calendar.DATE) - day);
    return now.getTime();
    }
          /**
    * 得到幾天后的時(shí)間
    * @param d
    * @param day
    * @return
    */
    public static Date getDateOfAfter(Date d, int day) {
    Calendar now = Calendar.getInstance();
    now.setTime(d);
    now.set(Calendar.DATE, now.get(Calendar.DATE) + day);
    return now.getTime();
    }
    posted @ 2013-06-28 17:55 魏文甫 閱讀(285) | 評(píng)論 (0)編輯 收藏
    在struts2中配置:<constant name="struts.multipart.saveDir" value="D:\\uploadFiles\\temp\\temp"></constant>

    類似的其他的配置有:
    <constant name="struts.convention.default.parent.package"
    value="crud-default" />
    <package name="crud-default" extends="convention-default">
    <interceptors>
    <interceptor name="checklogin"
    class="com.xiaowei.interceptor.CheckLoginInterceptor"></interceptor>
    <interceptor-stack name="crudStack">
    <interceptor-ref name="store">
    <param name="operationMode">AUTOMATIC</param>
    </interceptor-ref>
    <interceptor-ref name="paramsPrepareParamsStack" />
    <interceptor-ref name="checklogin">
    <param name="user">user</param>
    <param name="exclude">
    login,verifyAccount,login.jsp,image
    <!--有待添加 -->
    </param>
    </interceptor-ref>
    </interceptor-stack>
    </interceptors>
    <default-interceptor-ref name="crudStack" />
    <global-results>
    <result name="loginFail" type="dispatcher">/index.jsp
    </result>
    </global-results>
    <!-- <interceptor-stack name="fileUploadMaxSize" class="com.xiaowei.interceptor.CheckFileLengthMax"> 
    <interceptor-ref name="fileUpload"/> <interceptor-ref name="basicStack"/> 
    </interceptor-stack> -->
    </package>
    <constant name="struts.multipart.maxSize" value="20480000000"></constant>
    <constant name="struts.multipart.saveDir" value="D:\\uploadFiles\\temp\\temp"></constant>

    posted @ 2013-06-27 13:13 魏文甫 閱讀(407) | 評(píng)論 (0)編輯 收藏
    在簡(jiǎn)單地main函數(shù)中輸出的結(jié)果:0.8999999999999999;而非0.9;因?yàn)槭且远M(jìn)制存儲(chǔ)的,所以不能除盡1/10。
    解決方法有:1,System.out.printf("%.1f",2.0-1.1);   
    還有一個(gè)網(wǎng)上看到的:在double變量存入堆時(shí)確保精度的方法: System.out.println(new BigDecimal(1.1)); 輸出的值為一大長(zhǎng)串為:1.100000000000000088817841970012523233890533447265625
    posted @ 2012-02-28 19:17 魏文甫 閱讀(834) | 評(píng)論 (0)編輯 收藏
    好些天沒更新了,有些牽絆耽擱了很久,要慢慢拾起來(lái)......我要培養(yǎng)自己做一個(gè)有始有終的人。
    posted @ 2012-02-22 20:46 魏文甫 閱讀(151) | 評(píng)論 (0)編輯 收藏
    HTML中的一些對(duì)象()
    使用DOM-Document Object Model操作對(duì)象getElementById();getElementsByName();等
    而改變標(biāo)簽里的內(nèi)容要用.innerHTML,改變鏈接用.href例如:
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <title></title>
    <script type="text/javascript">
    function changerButton(){
    var link = document.getElementById("links");
    link.innerHTML = "NetEasy";//改變a標(biāo)簽里的內(nèi)容即改變了Sina
    link.;//鏈接改變了
    }
    </script>
    </head>
    <body>
    <a >Sina</a>
    <input type="button" value="Change" id="myButton" onclick="changerButton()"/>
    </body>
    </html>
    javascript里的一些應(yīng)用:例如<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title></title>
        <script type="text/javascript">
            var count = 0;
            var st;
            function showDiv() {        
                count++;
                if(count >=10) {
                    clearTimeout(st);        
                } else {
                    var div = document.getElementById("myDiv");
                    div.innerHTML = div.innerHTML + "I love you!";
                    st = setTimeout("showDiv()",200);
                }
            }
        </script>
    </head>
    <body>
        <div id="myDiv"></div>
        <input type="button" value="I love you!" onclick="showDiv()" />
    </body>
    </html>
    script里可以嵌套if語(yǔ)句等
    一些網(wǎng)頁(yè)里的時(shí)間顯示也可以用javascript來(lái)寫例如顯示時(shí)間的走動(dòng)的簡(jiǎn)單的頁(yè)面:
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title></title>
    </head>
    <body>
        <div id="timer"></div>
        <input type="button" value="showTime" onclick="showTimer()"  />
        <script type="text/javascript">        
            function showTimer() {
                var mydate = new Date();
                var text = mydate.toLocaleString();
                var div = document.getElementById("timer");
                div.innerHTML = text;
                setTimeout("showTimer()",1000);
            }
            window.onload = showTimer();
        </script>
    </body>
    </html>


    圖中時(shí)間顯示為走動(dòng)的狀態(tài)(時(shí)間在變)。
    posted @ 2011-12-05 21:05 魏文甫 閱讀(216) | 評(píng)論 (0)編輯 收藏
    JavaScript是編程語(yǔ)言,它跟html,css不同,簡(jiǎn)單的理解為:html的作用是你所寫的網(wǎng)頁(yè)的內(nèi)容,css是你對(duì)所寫網(wǎng)頁(yè)內(nèi)容的布局(內(nèi)容所在的位置,顏色,圖片等的美化),JavaScript是對(duì)網(wǎng)頁(yè)等得一些驗(yàn)證,切換的效果等等。JavaScript一般寫在最后面(因?yàn)榫W(wǎng)頁(yè)顯示時(shí)按順序顯示,一個(gè)網(wǎng)頁(yè)最重要的內(nèi)容要先顯示,再出現(xiàn)效果,而效果要比內(nèi)容長(zhǎng)得多)。
    JavaScript可以在里面寫if...else語(yǔ)句,for語(yǔ)句,while語(yǔ)句等,但和java的語(yǔ)法不同;例如一個(gè)不太規(guī)范簡(jiǎn)單的例子: 
     1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
     2 <html xmlns="http://www.w3.org/1999/xhtml">
     3 <head>
     4     <title></title>
     5     <script type="text/javascript">        
     6         var a=prompt("請(qǐng)輸入a的值:");
     7         var b=prompt("請(qǐng)輸入b的值:");
     8         alert("a+b的和為:"+(parseInt(a)+parseInt(b)));    
     9     </script>
    10 </head>
    11 <body>    
    12 </body>
    13 </html>
    輸入兩個(gè)值后結(jié)果為一個(gè)兩數(shù)和的窗口。

    JavaScript寫在function中,函數(shù)是由事件觸發(fā)的,例:
     1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
     2 <html xmlns="http://www.w3.org/1999/xhtml">
     3 <head>
     4     <title></title>
     5     <script type="text/javascript">        
     6         function sayHello(){
     7             var name=document.myform.mytext.value;
     8             alert("提交:"+name);
     9         }
    10         function clearMe(){
    11             document.myform.mytext.value="";
    12         }
    13     </script>    
    14 </head>
    15 <body>
    16     <form action="" name="myform">
    17         <input type="text" name="mytext" id="" value="" onclick="clearMe()"/>
    18         <input type="button" name="click me" value="提交" onclick="sayHello()"/>        
    19     </form>
    20 </body>
    21 </html>
    輸入一個(gè)值后彈出一個(gè)窗口:例
    posted @ 2011-12-03 23:17 魏文甫 閱讀(328) | 評(píng)論 (0)編輯 收藏
    HTML的定位
    HTML中要顯示有層次時(shí)用定位;定位有絕對(duì)定位,相對(duì)定位和固定定位。
    1.絕對(duì)定位:在選擇器中用position:absolute;此時(shí)它有類似與浮動(dòng)的效果,相當(dāng)于脫離了文檔流,如:
     1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
     2 <html xmlns="http://www.w3.org/1999/xhtml" 
     3 <head>
     4     <title></title>
     5     <style type="text/css">
     6         body{
     7             margin:0px;;
     8         }
     9         .div1{
    10             width:100px;
    11             height:100px;
    12             background-color:#669900;
    13             position:absolute;
    14         }
    15         .div2{
    16             width:200px;
    17             height:50px;
    18             background-color:#aa00ff;
    19         }
    20     </style>    
    21 </head>
    22 <body>
    23     <div class="div1">div1</div>
    24     <div class="div2">div2</div>
    25 </body>
    26 </html>

    此時(shí)div1像浮動(dòng)了,div2補(bǔ)上div1的位置(即有浮動(dòng)的效果,div2被div1遮住了)
    此時(shí)如果定義它的高和距離左右,定義的是該塊距離它的上一級(jí)(即它的父)的距離
     1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
     2 <html xmlns="http://www.w3.org/1999/xhtml" 
     3 <head>
     4     <title></title>
     5     <style type="text/css">
     6         body{
     7             margin:0px;;
     8         }
     9         .div1{
    10             width:100px;
    11             height:100px;
    12             background-color:#669900;
    13             position:absolute;
    14             top:10px;
    15             right:10px;
    16         }
    17         .div2{
    18             width:200px;
    19             height:50px;
    20             background-color:#aa00ff;
    21         }
    22     </style>    
    23 </head>
    24 <body>
    25     <div class="div1">div1</div>
    26     <div class="div2">div2</div>
    27 </body>
    28 </html>

    2.相對(duì)定位:position:relative;相對(duì)定位也有浮動(dòng)的效果,只是它相對(duì)于原來(lái)的位置發(fā)生了偏移。例如: 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
     2 <html xmlns="http://www.w3.org/1999/xhtml" 
     3 <head>
     4     <title></title>
     5     <style type="text/css">
     6         body{
     7             margin:0px;;
     8         }
     9         .div1{
    10             width:100px;
    11             height:100px;
    12             background-color:#669900;
    13             position:relative;
    14             top:10px;
    15             left:10px;
    16         }
    17         .div2{
    18             width:200px;
    19             height:50px;
    20             background-color:#aa00ff;
    21         }
    22     </style>    
    23 </head>
    24 <body>
    25     <div class="div1">div1</div>
    26     <div class="div2">div2</div>
    27 </body>
    28 </html>

    當(dāng)在body中為絕對(duì)定位時(shí),其父為相對(duì)定位如: 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
     2 <html xmlns="http://www.w3.org/1999/xhtml">
     3 <head>
     4     <title></title>
     5     <style type="text/css">
     6         body{
     7             margin:0px;
     8         }
     9         div{
    10             width:200px;
    11             height:200px;
    12         }
    13         .div1 {
    14             background-color:#ccc;
    15             position:absolute;
    16             bottom:0px;
    17             right:0px;
    18             z-index:999;
    19         }
    20         .div2 {
    21             margin-left:60px;
    22             width:500px;
    23             height:300px;
    24             background-color:#ff6600;
    25             position:relative;
    26         }
    27         
    28     </style>
    29 </head>
    30 <body>    
    31     <div class="div2">DIV2
    32         <div class="div1">DIV1</div>
    33     </div>
    34 </body>
    35 </html>

    此時(shí)div1的位置是相對(duì)于div2的位置來(lái)說(shuō)的。
    3.固定定位:固定定位個(gè)人認(rèn)為可以理解為固定于瀏覽器邊框,不隨滾動(dòng)條的滾動(dòng)而滾動(dòng):如:
     1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
     2 <html xmlns="http://www.w3.org/1999/xhtml" 
     3 <head>
     4     <title></title>
     5     <style type="text/css">
     6         body{
     7             margin:0px;;
     8         }
     9         .toolbar{
    10             height:30px;
    11             width:100%;
    12             background-color:green;
    13             position:fixed;
    14             top:0px;
    15             left:0px;
    16         }
    17         .div{
    18             width:150px;
    19             height:150px;
    20             background-color:#ff0000;
    21         }
    22     </style>    
    23 </head>
    24 <body>
    25     <div class="toolbar"></div><br/>
    26     <div class="div">div1</div><br/>
    27     <div class="div">div2</div><br/>
    28     <div class="div">div3</div><br/>
    29     <div class="div">div4</div><br/>
    30     <div class="div">div5</div><br/>
    31     <div class="div">div6</div><br/>
    32     <div class="div">div7</div><br/>
    33     <div class="div">div8</div>    <br/>
    34     <div class="div">div9</div><br/>
    35     <div class="div">div0</div><br/>
    36 </body>
    37 </html>
    posted @ 2011-12-01 18:57 魏文甫 閱讀(5300) | 評(píng)論 (1)編輯 收藏
    HTML中當(dāng)一個(gè)元素為塊級(jí)元素時(shí),變?yōu)樾袃?nèi)元素的方法在它的選擇器中添加:display:inline;,而行內(nèi)元素變換為塊級(jí)元素:display:block;
    行內(nèi)元素定義它的height和width時(shí)沒效果,而變換為塊級(jí)時(shí)就可以定義它的height和width
    而當(dāng)它為塊級(jí)元素時(shí)會(huì)獨(dú)占整個(gè)定義的空間,即使整行有空余下一個(gè)元素也要換行,這時(shí)只需在選擇器中添加float:left或right即可;這時(shí)再添加就會(huì)緊接著它放元素(如果還有空間),這時(shí)就需要在要換行的元素選擇器中添加clear:both;因?yàn)橐坏┰馗?dòng)(float)就不屬于塊級(jí)了,
      1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
     2 <html xmlns="http://www.w3.org/1999/xhtml" >
     3 <head>
     4     <meta http-equiv="Content-Type" content="text/html;charset=gbk" />
     5     <title></title>
     6     <style type="text/css">
     7         body{
     8             margin:0px;    
     9         }
    10         .div{
    11             margin:opx;;
    12             width:960px;
    13             height:400px;
    14             margin:auto;
    15             border:1px red solid;
    16         }
    17         .div #left{
    18             background-color:#aa4411;
    19             display:block;
    20             border:blue solid 1px;
    21             width:100px;
    22             height:100px;
    23             float:left;
    24             text-decoration:none;
    25             line-height:100px;    
    26         }
    27         .div #right{
    28             background-color:#666;
    29             display:block;
    30             width:100px;
    31             height:100px;
    32             border:green solid 1px;
    33             text-decoration:none;
    34             float:left;
    35         }
    36         .div #lin{
    37             width:50px;
    38             height:50px;
    39             display:block;
    40             text-decoration:none;
    41             clear:both;
    42             border:1px red dashed;    
    43         }
    44         a:hover{
    45             color:green;
    46         }
    47         .link{
    48             text-decoration:none;
    49         }
    50     </style>
    51 </head>
    52 <body>
    53     <div class="div">
    54         <a href="" id="left">left</a>
    55         <a href="" id="right">right</a>
    56         <a href="" id="lin">link</a>
    57     </div>
    58 </body>
    59 </html> 
     
    posted @ 2011-11-29 10:14 魏文甫 閱讀(191) | 評(píng)論 (0)編輯 收藏
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