public class BaseCache extends GeneralCacheAdministrator {
// 过期时间(单位为秒);
 private int refreshPeriod;
 

 public BaseCache(int refreshPeriod){
    super();
    this.refreshPeriod=refreshPeriod;
 }
// 添加被缓存的对象;
 public void put(String key,Object value){
    this.putInCache(key,value);
 }
// 删除被缓存的对象;
 public void remove(String key){
    this.flushEntry(key);
 }
// 删除所有被缓存的对象;
 public void removeAll(Date date){
    this.flushAll(date);
 }

 public void removeAll(){
    this.flushAll();
   
 }
// 获取被缓存的对象;
 public Object get(String key) throws Exception{
    try{
     return this.getFromCache(key,this.refreshPeriod);
    } catch (NeedsRefreshException e) {
     this.cancelUpdate(key);
          throw e;
    }
   }
}
2.执行方法:
在方法里,indexCache = new BaseCache(3600),hii = new cache.Hits(hits),这个类是自己写的,下面的详细代码,然后调用put(String key,Object value)方法,key是关键字.下次取的时候就直接get(key),key我是用的查询参数组成的,只要下次当别人用到相同条件搜索时,就可以直接从缓存读数据,这里所提到的是org.apache.lucene.search.Hits这个对像是不能被缓存的,没有被序例化,我查了下源码,也不能被继承,所以大家自己写个类implements Serializable

public class Hits implements Serializable   {
  private  org.apache.lucene.search.Hits hits;
  private  Document[] docs=null;
  private boolean flag=true;
 
 /**
  * sundc 2007-11-20
  */
 public Hits(org.apache.lucene.search.Hits hits) {
  this.docs=new Document[hits.length()];
  int length=0;
//我这里是定义记录有只缓存前710多记录,如果大于710还是查lucene,大家都知道搜索用户访问都是几页,大家可以针对自己项目进行规化..
if(hits.length()>=710){
   length=710;
  }
  else{
   length=hits.length(); 
  }
   for(int i=0;i<length;i++){
   try {
    this.docs[i]=hits.doc(i);
   } catch (CorruptIndexException e) {
    e.printStackTrace();
   } catch (IOException e) {
    e.printStackTrace();
   }
  }
 }

 
 public Hits( Document[] doc){
  this.docs=doc;
 }
 public  Document doc(int i){
  if(!this.flag){
   try {
    return this.hits.doc(i);
   } catch (CorruptIndexException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
   
  }
  return this.docs[i];
 }

 public  int length(){
  if(this.flag){
   return  docs.length;
  }
  return this.hits.length();
 }
 
 public  Document[] getDocs() {
  return this.docs;
 }

 public  void setDocs(Document[] docs) {
  this.docs = docs;
 }

 public org.apache.lucene.search.Hits getHits() {
  return this.hits;
 }

 public void setHits(org.apache.lucene.search.Hits hits) {
  this.hits = hits;
 }
}
我这里是如果有缓存数据,就读缓存,没有,就lucene然后放在缓存里.大家可以调用indexCache.get(key),大家每一次访问的时候会相对很慢.如果缓存已经建立了,那么速度会很快,大家在用的时候,针对自己项目的数据要求,进行缓存.下面介绍内存缓存.
  2.内存缓存可以相对要快点.但是针对服务器的本身内存大小,大家针对自己的项目和服务器的配置选择好的缓存方式.,把cache.memory=true,这样就可以了.
3.还可以实现页面级缓存
你可以在web.xml中定义缓存过滤器，定义特定资源的缓存。
<filter>
<filter-name>CacheFilter</filter-name>
<filter-class>com.opensymphony.oscache.web.filter.CacheFilter</filter-class>
<init-param>
<param-name>time</param-name>
<param-value>60</param-value>
</init-param>
<init-param>
<param-name>scope</param-name>
<param-value>session</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CacheFilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
上面定义将缓存所有.jsp页面，缓存刷新时间为60秒，缓存作用域为Session,
注意，CacheFilter只捕获Http头为200的页面请求，即只对无错误请求作缓存，
而不对其他请求（如500,404,400）作缓存处理.
我这里介绍的不全,只是我在项目中用到了这些.如果有什么问题,虚心接受....

 import java.util.Date;                                          
 public final class BrokenPerson                                
 {                                                              
  private String firstName;                                    
  private String lastName;                                     
  private Date dob;                                            
                                         
  public BrokenPerson( String firstName,                   public BetterPerson( String firstName,
    String lastName, Date dob)                                             String lastName, Date dob)          
  {                                                                                      {                                     
   this.firstName = firstName;                                             this.firstName = firstName;         
   this.lastName = lastName;                                             this.lastName = lastName;           
   this.dob = dob;     //error               this.dob = new Date( dob.getTime() ); //correct
  }                                                                                       }                                      
                                                             
  public String getFirstName()
  {
   return this.firstName;
  }
  public String getLastName()
  {
   return this.lastName;
  }
  public Date getDOB()                                               public Date getDOB()                     
  {                                                                                    {                                      
   return this.dob;    //error                  return new Date( this.dob.getTime() );//correct
  }                                                                                     }                                      
 }
  4. jdk的可变类和不可变类

primitive变量: boolean,byte, char, double ,float, integer, long, short
jdk的不可变类：jdk的java.lang包中 Boolean, Byte, Character, Double, Float, Integer, Long, Short, String.
 
  StringBuffer 可变类
  java.util.Date 可变类

本示例代码引用了以下两个包：
dom4j-1.6.1.jar
jaxen-1.1-beta-6.jar

下载与安装
  dom4j是sourceforge.net上的一个开源项目，主要用于对XML的解析。dom4j专门针对Java开发，使用起来非常简单、直观。
  可以到http://sourceforge.net/projects/dom4j下载其最新版。
  dom4j1.6解压后有一个dom4j-1.6.1.jar文件，这就是应用时需要引入的类包，另外还有一个jaxen-1.1-beta-6.jar 文件，需要引入，否则执行时可能抛java.lang.NoClassDefFoundError: org/jaxen/JaxenException异常

代码如下:
package com.tl.common.util;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

/**
 * @author zhangql
 *
 * To change this generated comment edit the template variable "typecomment":
 * Window>Preferences>Java>Templates. To enable and disable the creation of type
 * comments go to Window>Preferences>Java>Code Generation.
 */
public final class ConfigtUtil
{
  
   
    /**
     * 空方法，未实现
     */
    public void getRootNodeAttribute()
    {
        //TODO
    }
   
    /** 返回节点路径
     * @param rootNodeName
     * @param childNodeName
     * @return String
     */
    public String getNodePath(String rootNodeName,String childNodeName)
    {
        String result = null;
        if(rootNodeName== "" || rootNodeName == null ||
                childNodeName == "" || childNodeName == null)
        {
            return result;
        }
        result = getNodePath(rootNodeName,childNodeName,null);
        return result;
    }
   
    /**
     * 返回节点路径
     * @param rootNodeName
     * @param childNodeName
     * @param childAttributeName
     * @return String
     */
    public String getNodePath(String rootNodeName,String childNodeName,String childAttributeName)
    {
        String result = null;
        if(rootNodeName== "" || rootNodeName == null ||
                childNodeName == "" || childNodeName == null )
        {
            return result;
        }
        String dima = "/";
        StringBuffer nodePath = new StringBuffer();
        nodePath.append(rootNodeName);
        nodePath.append(dima).append(childNodeName);
        if(childAttributeName != null && childAttributeName != "")
        {
            nodePath.append(dima).append("@");
            nodePath.append(childAttributeName);
        }
       
        result = nodePath.toString();
        return result;
    }
   
    /**
     * 更新子节点属性值
     * @param filePathAndName
     * @param rootNodeName
     * @param childNodeName
     * @param childAttributeName
     * @param childAttributeValue
     * @return boolean
     * @throws DocumentException
     * @throws IOException
     */
    public boolean updateChildNodeAttributeValue(String filePathAndName, String rootNodeName,
            String childNodeName,String childAttributeName,
            String childAttributeValue) throws DocumentException, IOException
    {
        boolean result = false;
        if(filePathAndName == "" || filePathAndName == null ||
                rootNodeName== "" || rootNodeName == null ||
                childNodeName == "" || childNodeName == null ||
                childAttributeName == "" || childAttributeName == null ||
                childAttributeValue == "" || childAttributeValue == null)
        {
            return result;
        }
       
       String nodePath = getNodePath(rootNodeName,childNodeName,childAttributeName);
       Document document = getDocument(filePathAndName);       
       List list = getListByDocument(document,nodePath);
       for(Iterator iter = list.iterator();iter.hasNext();)
       {
           Attribute attribute = (Attribute) iter.next();
           attribute.setValue(childAttributeValue);
       }
       result = writerConfigFileByFormat(filePathAndName,document);
       return result;
    }
   
    /**
     * 取得Document中指定节点下的所有节点集合
     * @param document
     * @param nodeName
     * @return List
     */
    public List getListByDocument(Document document,String nodeName)
    {
        if(document == null || nodeName == null || nodeName == "")
        {
            return null;
        }
        List list = null;
        list = document.selectNodes(nodeName);
        return list;
    }
   
    /**
     *  获取Document
     * @param filePathAndName
     * @return Document
     * @throws DocumentException
     */
    public Document getDocument(String filePathAndName)
            throws DocumentException
    {
        Document document = null;
        if (filePathAndName == null || filePathAndName == "")
        {
            return document;
        }
        SAXReader saxReader = new SAXReader();
        document = saxReader.read(new File(filePathAndName));
        return document;
    }

    /**
     * 获取根节点下的子节点集合
     * @param filePathAndName
     * @param rootNodeName
     * @param childNodeName
     * @return List
     * @throws DocumentException
     */
    public List getRootListByChildNode(String filePathAndName, String rootNodeName,
            String childNodeName) throws DocumentException
    {
        List  result = null;
        if (filePathAndName == null || filePathAndName == "" ||
                rootNodeName == null || rootNodeName == "" ||
                childNodeName == null || childNodeName =="")
        {
            return result;
        }
        String nodePath = getNodePath(rootNodeName,childNodeName);
        result = getRootNodeList(filePathAndName,nodePath);
        return result;
    }
   
    /**
     * 获取根节点集合
     * @param filePathAndName
     * @param rootNodeName
     * @return List
     * @throws DocumentException
     */
    public List getRootNodeList(String filePathAndName, String rootNodeName)
            throws DocumentException
    {
        List list = null;
        if (filePathAndName == null || filePathAndName == "" ||
                rootNodeName == null || rootNodeName == "")
        {
            return list;
        }
        list = getNodeList(filePathAndName,rootNodeName);
        return list;
    }
   
    /**
     * 取得节点集合
     * @param filePathAndName
     * @param nodePath
     * @return List
     * @throws DocumentException
     */
    public List getNodeList(String filePathAndName, String nodePath) throws DocumentException
    {
        List list = null;
        if (filePathAndName == null || filePathAndName == "" ||
                nodePath == null || nodePath == "")
        {
            return list;
        }
        list = getListByDocument(getDocument(filePathAndName),nodePath);
        return list;
    }

    /**
     * 获取节点的值
     * @param filePathAndName
     * @param rootNodeName
     * @param nodeName
     * @return String
     * @throws DocumentException
     */
    public String getNodeValue(String filePathAndName, String rootNodeName,
            String nodeName) throws DocumentException
    {
        String result = null;
        if (filePathAndName == null || filePathAndName == ""
                || rootNodeName == null || rootNodeName == ""
                || nodeName == null || nodeName == "")
        {
            return result;
        }
        List list = getRootNodeList(filePathAndName, rootNodeName);
        result = getNodeValue(list, nodeName);
        return result;
    }
   
    /**
     * 获取子节点值
     * @param list
     * @param childNodeName
     * @return String
     */
    public String getChildNodeValue(List list,String childNodeName)
    {
       String result = null;
       if(list.isEmpty() || childNodeName == "" || childNodeName == null)
       {
           return result;
       }
       result = getNodeValue(list,childNodeName);
       return result;
    }

    /**
     * 获取子节点值
     * @param list
     * @return String
     */
    public String getChildNodeValue(List list)
    {
       String result = null;
       if(list.isEmpty())
       {
           return result;
       }
       for(Iterator iter = list.iterator();iter.hasNext();)
       {
           Element element = (Element)iter.next();
           result = element.getText();
       }
        return result;
    }
   
    /**
     * 取得子节点的属性值
     * @param filePathAndName
     * @param rootNodeName
     * @param childNodeName
     * @param childAttributeName
     * @return String
     * @throws DocumentException
     */
    public String getChildNodeAttributeValue(String filePathAndName,
            String rootNodeName, String childNodeName, String childAttributeName)
            throws DocumentException
    {
        String result = null;
        if(filePathAndName == "" || filePathAndName == null ||
                rootNodeName == "" || rootNodeName == null ||
                childNodeName == "" || childNodeName == null ||
                childAttributeName == null || childAttributeName == "")
        {
            return result;
        }

        String nodePath = getNodePath(rootNodeName, childNodeName,childAttributeName);
        List list = getNodeList(filePathAndName, nodePath);
        result = getChildNodeAttributeValue(list);

        return result;
    }
   
    /**
     * 此方法未实现
     * @param list
     * @param nodeName
     * @param attributeName
     * @return
     */
    public String getChildNodeAttributeValue(List list,String nodeName,String attributeName)
    {
        String result = null;
        if(list.isEmpty() || nodeName == null || nodeName =="" ||
                attributeName == null || attributeName =="")
        {
            return result;
        }
        //TODO
//        String nodePath = getNodePath(nodeName,attributeName);
//       
//        for (Iterator iter = list.iterator(); iter.hasNext();)
//        {
//            Element element = (Element) iter.next();
//            System.out.println("---->"+element.selectNodes(nodeName).size());
//            System.out.println("---->"+element.selectNodes(nodePath).size());
//            for(Iterator elementIter = element.selectNodes(nodeName).iterator();elementIter.hasNext();)
//            {
//                Attribute attribute = (Attribute)elementIter.next();
//                System.out.println("---->"+attribute.getValue());
//            }
////            result = getChildNodeAttributeValue(element.selectNodes(nodeName));          
//        }
       
        return result;
    }
   
    /**
     * 获取子节点属性的值
     * @param list
     * @param childNodeAttributeName
     * @return String
     */
    public String getChildNodeAttributeValue(List list,String childNodeAttributeName)
    {
        String result = null;
        if(list.isEmpty() || childNodeAttributeName == null || childNodeAttributeName =="")
        {
            return result;
        }
        result = getNodeValue(list,childNodeAttributeName);
        return result;
    }
   
    /**
     * 获取子节点属性的值
     * @param list
     * @return String
     */
    public String getChildNodeAttributeValue(List list)
    {
        String result = null;
        if(list.isEmpty())
        {
            return result;
        }    
        for(Iterator iter = list.iterator();iter.hasNext();)
        {
            Attribute attribute = (Attribute)iter.next();
            result = attribute.getValue();
        }      
        return result;
    }
   
    /**
     * 获取节点值
     * @param nodeList
     * @param nodeName
     * @return String
     */
    public String getNodeValue(List nodeList, String nodeName)
    {
        String result = null;
        if (nodeList.isEmpty())
        {
            return result;
        }

        for (Iterator iter = nodeList.iterator(); iter.hasNext();)
        {
            Element element = (Element) iter.next();
            for (Iterator it = element.selectNodes(nodeName).iterator(); it.hasNext();)
            {
                result = ((Element) it.next()).getText();
            }
        }
        return result;
    }

    /**
     * 更新节点值
     * @param filePathAndName
     * @param rootNodeName
     * @param nodeName
     * @param NodeVlaue
     * @return boolean
     * @throws Exception
     */
    public boolean updateNodeValue(String filePathAndName, String rootNodeName,
            String nodeName, String NodeVlaue) throws Exception
    {
        boolean result = false;       
        Document document = getDocument(filePathAndName);
        List list = document.selectNodes(rootNodeName);       
        for (Iterator iter = list.iterator(); iter.hasNext();)
        {
            Element element = (Element) iter.next();
            for (Iterator childIterator = element.selectNodes(nodeName)
                    .iterator(); childIterator.hasNext();)
            {
                Element childElement = (Element) childIterator.next();
                childElement.setText(NodeVlaue);
            }
        }
        /** 将document中的内容写入文件中 */
        result = writerConfigFileByFormat(filePathAndName,document);       
        return result;
    }
  
    /**
     * 创建XMLWriter
     * @param filePathAndName
     * @return XMLWriter
     * @throws IOException
     */
    private XMLWriter createXMLWriter(String filePathAndName) throws IOException
    {
        XMLWriter writer = null;
        writer = new XMLWriter(new FileWriter(new File(filePathAndName)));
        return writer;
    }
   
    /**
     * 创建XMLWriter
     * @param filePathAndName
     * @param outputFormat
     * @return XMLWriter
     * @throws IOException
     */
    private XMLWriter createXMLWriter(String filePathAndName,OutputFormat outputFormat) throws IOException
    {
        XMLWriter writer = null;
        writer = new XMLWriter(new FileWriter(new File(filePathAndName)), outputFormat);
        return writer;
    }
   
    /**
     * 以GBK格式化写文件
     * @param filePathAndName
     * @param document
     * @return boolean
     */
    public boolean writerConfigFileByFormat(String filePathAndName,Document document)
    {
        boolean result = false;
        try
        {                       
            result = writerConfigFileByFormat(filePathAndName,document,"GBK");
        }
        catch (Exception ex)
        {
            ex.printStackTrace();
        }
        return result;
    }
   
    /**
     * 格式化写文件
     * @param filePathAndName
     * @param document
     * @param encoding
     * @return boolean
     */
    public boolean writerConfigFileByFormat(String filePathAndName,Document document,String encoding)
    {
        boolean result = false;
        try
        {           
            XMLWriter writer = null;
            OutputFormat format = OutputFormat.createPrettyPrint();
            format.setEncoding(encoding);
            writer = createXMLWriter(filePathAndName, format);
            writerConfigFile(writer,document);
            result = true;
        }
        catch (Exception ex)
        {
            ex.printStackTrace();
        }
        return result;
    }
   
   
    /**
     * 写文件
     * @param filePathAndName
     * @param document
     * @return boolean
     * @throws IOException
     */
    public boolean writerConfigFile(String filePathAndName,Document document) throws IOException
    {
        boolean result = false;
        XMLWriter writer = createXMLWriter(filePathAndName);
        writerConfigFile(writer,document);
        result = true;
        return result;
    }
   
    /**
     * 写文件    
     * @param xmlWriter
     * @param document
     * @return boolean
     * @throws IOException
     */
    public boolean  writerConfigFile(XMLWriter xmlWriter,Document document) throws IOException
    {
        boolean result = false;
        xmlWriter.write(document);
        xmlWriter.close();
        result = true;
        return result;
    }
   
    /**
     * 此方法为网上转载，临时加入到本类，未作代码验证
     * 建立一个XML文档,文档名由输入属性决定
     * @param filename 需建立的文件名
     * @return 返回操作结果, 0表失败, 1表成功
     */
    public int createXMLFile(String filename)
    {
       /** 返回操作结果, 0表失败, 1表成功 */
       int returnValue = 0;
       /** 建立document对象 */
       Document document = DocumentHelper.createDocument();
       /** 建立XML文档的根books */
       Element booksElement = document.addElement("books");
       /** 加入一行注释 */
       booksElement.addComment("This is a test for dom4j, holen, 2004.9.11");
       /** 加入第一个book节点 */
       Element bookElement = booksElement.addElement("book");
       /** 加入show属性内容 */
       bookElement.addAttribute("show","yes");
       /** 加入title节点 */
       Element titleElement = bookElement.addElement("title");
       /** 为title设置内容 */
       titleElement.setText("Dom4j Tutorials");      
       /** 类似的完成后两个book */
       bookElement = booksElement.addElement("book");
       bookElement.addAttribute("show","yes");
       titleElement = bookElement.addElement("title");
       titleElement.setText("Lucene Studing");
       bookElement = booksElement.addElement("book");
       bookElement.addAttribute("show","no");
       titleElement = bookElement.addElement("title");
       titleElement.setText("Lucene in Action");      

       /** 加入owner节点 */
       Element ownerElement = booksElement.addElement("owner");
       ownerElement.setText("O'Reilly");
       try
       {
           /** 将document中的内容写入文件中 */
           XMLWriter writer = new XMLWriter(new FileWriter(new File(filename)));
           writer.write(document);
           writer.close();
           /** 执行成功,需返回1 */
           returnValue = 1;

       }
       catch(Exception ex)
       {
           ex.printStackTrace();
       }
       return returnValue;
    } 
}

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附：

一、如何设置上传文件语言

把FCKeditor根目录下面的fckconfig.js文件里

var _FileBrowserLanguage    = 'asp' ;    // asp | aspx | cfm | lasso | perl | php | py
var _QuickUploadLanguage    = 'asp' ;    // asp | aspx | cfm | lasso | php

这两行中改成您所需要调用的编辑器语言，如用asp.net则改为aspx；

二、解决中文的问题:
在web.config中加入:
<globalization requestEncoding="GB2312" responseEncoding="GB2312"/>
这样设置后可以显示中文的文件，但URL地址也是中文的；
如果服务器对中文地址的解析不好，可能导致图片无法浏览；
所以修改：editor\filemanager\browser\default\frmresourceslist.html
中的OpenFile函数，把
window.top.opener.SetUrl( fileUrl ) ;
修改为:
window.top.opener.SetUrl( escape(fileUrl) ) ;

三.设置上传的目录：
1:在web.config中设置:
 <appSettings>
     <add key="FCKeditor:UserFilesPath" value="/fck/UpLoad/" />
 </appSettings>

2:在Session中设置:
在editor\filemanager\browser\default\connectors\aspx\connector.aspx中加入以下代码:
<script runat="server" language="C#">
 protected override void OnInit(EventArgs e)
 {
  Session["FCKeditor:UserFilesPath"] = "/fck/UpLoad1/";
 }
</script>

附：如何在asp.net中动态设置上传图片的路径？

1.在javascript中修改FCKConfig.ImageBrowserURL的值，修改方式如下：
 FCKConfig.ImageBrowserURL += "?Path=要上传的文件路径";
 如:要把文件上传到站点根目录的UploadFile文件夹中，则设置为：
 FCKConfig.ImageBrowserURL += "?Path=/UploadFile";
2.在"editor\filemanager\browser\default\connectors\aspx\connector.aspx"文件最后中增加以下程序：
<script runat="server" language="C#">
    protected override void OnInit(EventArgs e)
    {
 if( Request.QueryString["Path"]==null ){
  Session["FCKeditor:UserFilesPath"] = "/UpLoadFiles/"; //设置默认值
 }else{
  Session["FCKeditor:UserFilesPath"] = Request.QueryString["Path"];
 }
    }
</script>

posted on 2007-08-22 10:56 春风依旧 阅读(13) 评论(1)  编辑 收藏 引用 网摘 所属分类: 前台脚本