jsp页面的静态化处理方法一

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java

JSP Java Servlet C++C#

jsp:

index.jsp 首页，显示产品信息查询的连接。

product.jsp 显示产品列表。

detail.jsp 显示每个产品的详细信息。

java

Product .java 构造model数据，用户页面显示。

ProductDao.java 也是为了构造数据。直接用个列表生成数据

EncodingFilter.java 为了显示中文。

ToHtml.java 一个Servlet主要是为了根据link里面的file_name 参数生成html文件的。参考下面的连接。

http://blog.csdn.net/zoucui/archive/2009/03/26/4027378.aspx

JspToHtmlFilter.java 对请求的Jsp做过滤，如果是在配置的范围内，就直接转向静态文件（前提，静态文件存在）

HtmlUtil.java 用户配置哪些jsp页面需要转换成html。用Servlet的ServletPath匹配。

CallHtml.java 用户客户端请求配置好的jsp连接，让服务端的servlet去执行文件的转换。

index.jsp文件如下：

<%@ page language="java" contentType="text/html; charset=gb2312"%>
<%@ page pageEncoding="gb2312"%>
<%@taglib prefix="c" uri="http://java.sun.com/jstl/core"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<head/>
<body>
 
<a href="<%=request.getContextPath()%>/product.jsp">产看产品信息</a>
</body>
<html>

product.jsp :

<%@ page language="java" contentType="text/html; charset=gb2312"%>
<%@ page pageEncoding="gb2312"%>
<%@taglib prefix="c" uri="http://java.sun.com/jstl/core"%>
<%@page import="com.liuxt.jsphtml.util.*" %>

<%request.setAttribute("productList",ProductDao.getInstance().getProductList()); %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<head/>
<body>
 产品信息如下：
<table border="1">
<th>产品ID</th><th>产品名称</th>
<c:forEach items="${productList}" var="product">
<tr>

<td><a href="<%=request.getContextPath()%>/detail.jsp?id=<c:out value='${product.id}'/>"><c:out value="${product.id}" /></a></td>
<td><c:out value="${product.name}" /></td>
</tr>
</c:forEach>
</table>

</body>
<html>

detail.jsp

String productId=request.getParameter("id");
Product p=ProductDao.getInstance().getProduct(productId);
request.setAttribute("product",p);
%>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<head/>
<body>
 产品信息如下：
 产品ID
 <c:out value="${product.id}"/>

产品名称
 <c:out value="${product.name}"/>

产品描叙
 <c:out value="${product.describe}"/>

产品价格
 <c:out value="${product.price}"/>

</body>
<html>

Product.java

package com.liuxt.jsphtml.util;

public class Product {

String id;
String name;
String describe;
String price;

public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Product(String id, String name) {
super();

this.id = id;
this.name = name;
}

public Product() {
}
public String getDescribe() {
return describe;
}
public void setDescribe(String describe) {
this.describe = describe;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}

}

ProductDao.java

package com.liuxt.jsphtml.util;

import java.util.ArrayList;
import java.util.List;

public class ProductDao {

private static List productList=new ArrayList();
private static ProductDao productDao=new ProductDao();

@SuppressWarnings("unchecked")
private ProductDao(){

Product product1=new Product();
product1.setId("T01");
product1.setName("草莓");
product1.setDescribe("好吃有好看");
product1.setPrice("5.00");

Product product2=new Product();
product2.setId("T02");
product2.setName("芒果");
product2.setDescribe("新鲜的，刚从福建运过来的");
product2.setPrice("4.00");

Product product3=new Product();
product3.setId("T03");
product3.setName("大樱桃");
product3.setDescribe("绝对的，吃了还想买的。好品牌的，大红灯。");
product3.setPrice("15.00");
productList.add(product1);
productList.add(product2);
productList.add(product3);
}

public static ProductDao getInstance(){
return productDao;
}

@SuppressWarnings("unchecked")
public List getProductList(){
return productList;

}

public Product getProduct(String id){
Product p=null;
for(int i=0;i<productList.size();i++){
 p=(Product) productList.get(i);
 if(p!=null){
 if (p.getId().equals(id)){
 return p;
 }
 }
}
return null;
}

}

EncodingFilter.java

package com.liuxt.jsphtml.util;

import java.io.IOException;

public class EncodingFilter implements Filter {

private FilterConfig filterConfig;

public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig=filterConfig;
}

public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {

request.setCharacterEncoding("gb2312");
chain.doFilter(request, response);

}

public void destroy() {

}

HtmlUtil.java

package com.liuxt.jsphtml.util;

import java.util.HashSet;
import java.util.Set;

public class HtmlUtil {

public static final Set<String> urlSet=new HashSet<String>();

static{
urlSet.add("/product.jsp");
urlSet.add("/index.jsp");
urlSet.add("/test/index.jsp");

}

}

JspToHtmlFilter.java

package com.liuxt.jsphtml.util;

import java.io.File;
import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class JspToHtmlFilter implements Filter {

private FilterConfig filterConfig;

public void destroy() {

}

public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {

   //前台发送的请求，过滤处理
HttpServletRequest res=(HttpServletRequest)request;
String jspURL=res.getServletPath();
System.out.println("jspURL========"+jspURL);

if (HtmlUtil.urlSet.contains(jspURL)) {
     String realpath = filterConfig.getServletContext().getRealPath("/");
     String file_name=jspURL;
     file_name=file_name.replace("/","_");
     file_name=file_name.replace(".","_");
     String fileName = realpath + "staticPages/" + file_name + ".html";
     System.out.println("fileName in filter=="+fileName);
     File file = new File(fileName);
     // 判断文件是否存在
     if (file.exists()) {// 不存在生成
    // 文件存在，直接转发
    // 转向到该html页面
    HttpServletResponse hsr = (HttpServletResponse) response;
    hsr.sendRedirect("staticPages/" + file_name+".html");
    return;
     }
   }
//参数为空，继续chain中的其它filter.
chain.doFilter(request, response);

}

public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
//加入初始化的连接，将一些定义好的连接，需要转化为html的，放入集合中。
}

}

CallHtml.java

package com.liuxt.jsphtml.util;

import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.Iterator;

public class CallHtml {

public static void main(String[] args) {
CallHtml callHtml=new CallHtml();
callHtml.makeHtml();
}

    private void makeHtml() {

     Iterator iter=HtmlUtil.urlSet.iterator();
     while(iter.hasNext()){
      String path=(String)iter.next();
      callOnePage(path);
     }
}

public void callOnePage(String fileName) {
           try {
            String str = "http://localhost:8080/htmlweb/toHtml?file_name=" + fileName;
            System.out.println("link========="+str);
            int httpResult;
            URL url = new URL(str);
            URLConnection connection = url.openConnection();
            connection.connect();
            HttpURLConnection httpURLConnection = (HttpURLConnection) connection;
            httpResult = httpURLConnection.getResponseCode();
            if (httpResult != HttpURLConnection.HTTP_OK) {
             System.out.println("没有连接成功");
            } else {
             System.out.println("连接成功了　");
            }
           } catch (Exception e) {
            e.printStackTrace();
           }
          }

}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app>
<display-name>htmlweb</display-name>
<servlet>
<description></description>
<display-name>toHtml</display-name>
<servlet-name>toHtml</servlet-name>
<servlet-class> com.liuxt.jsphtml.util.ToHtml</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>toHtml</servlet-name>
<url-pattern>/toHtml</url-pattern>
</servlet-mapping>

<filter>
<filter-name>JspToHtmlFilter</filter-name>
<filter-class>
com.liuxt.jsphtml.util.JspToHtmlFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>JspToHtmlFilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>

<filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>
com.liuxt.jsphtml.util.EncodingFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

htmlweb.war (737.4 KB)
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2009-05-24 22:01
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