URL重写

URL重写说的简单一点就是把浏览器中显示的URL显示为你想要的各种形式的URL链接
除此之外，还能进行URL生成.html  .htm .shtml等伪静态页面，更有利于搜索引擎的搜索
最近项目中用到了URL重写，其实URL重写有很多中方法，个人感觉用的比较多的有两种，
一种是写个filter对请求进行拦截，可以使用正则表达式进行匹配
1.配置过滤器一般在web.xml中

<filter>
    <filter-name>urlFilter</filter-name>
    <filter-class>com.url.filter.URLFilter</filter-class>
</filter>

<filter-mapping>
    <filter-name>urlFilter</filter-name>
    <url-pattern>*.html</url-pattern>
</filter-mapping> 

2.过滤器处理类 URLFilter.java

public class URLFilter implements Filter {
    public void doFilter(ServletRequest servletRequest, ServletResponse    
                              servletResponse, FilterChain filterChain) throws
                                        IOException,ServletException
    {
       HttpServletRequest request = (HttpServletRequest) servletRequest;
       HttpServletResponse response = (HttpServletResponse) servletResponse;
       //做相应的拦截处理
       //filterChain.doFilter代表请求已经通过拦截器，可以将请求转发或者重定向
       filterChain.doFilter(servletRequest, servletResponse);

    } 

第二种方法是采用过滤组件，进行url重定向
下载urlrewrite-2.6.0.jar
1.web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
	<filter>
		<filter-name>UrlRewriteFilter</filter-name>
		<filter-class>org.tuckey.web.filters.urlrewrite.UrlRewriteFilter</filter-class>
		<init-param>
			<param-name>confPath</param-name>
			<param-value>/WEB-INF/urlrewrite.xml</param-value>
		</init-param>
	</filter>
	<filter-mapping>
	<filter-name>UrlRewriteFilter</filter-name>
	<url-pattern>/*</url-pattern>
	</filter-mapping>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
</web-app>

2.urlrewrite.xml名字不能改变，放在和web.xml一起即可
下面的正则表达式代表，它会拦截url后缀为0-9的链接，然后转发到jsp/url.jsp页面，并把匹配的正则表达式复制给mid，url.jsp页面可以得到匹配的正则表达式的值

<?xml version="1.0" encoding="utf-8"?>  
 <!DOCTYPE urlrewrite PUBLIC "-//tuckey.org//DTD UrlRewrite 3.1//EN"  
        "http://tuckey.org/res/dtds/urlrewrite3.1.dtd">
<urlrewrite>
	<rule>
	<from>^/([0-9]*)$</from>
	<to>/jsp/url.jsp?mid=$1</to>
	</rule>
</urlrewrite>

评论

1 楼 courage207 2011-09-27