解决因Struts2.0中org.apache.struts2.dispatcher.FilterDispatcher的Encoding问题使页面成乱码的总题
用Freemarker生成静态页后,访问时老是出现乱码.

关于生成静态页的过程用的都是UTF-8编码.也没出现什么问题,生成的静态页双击打开,都很正常,没有出现乱码问题.

但是项目(用到struts2.0)布署到TOMCAT中,老是出现乱码问题,浏览器打开生成的静态页时,老是用ISO-8859-1的编码打开,必然是乱码,右击》编码》UTF-8打开,一切显示正常,所以应该是项目中filter的编码有问题.

当把WEB.XML中的Fileter去了,就没有乱码问题.

<filter> 
       <filter-name>struts</filter-name> 
       <filter-class> 
           org.apache.struts2.dispatcher.FilterDispatcher 
       </filter-class> 
</filter>
    <filter-mapping> 
       <filter-name>struts</filter-name> 
       <url-pattern>/*</url-pattern> 
</filter-mapping> 

所以应该在该Filter里配置编码.查看 org.apache.struts2.dispatcher.FilterDispatcher 的init方法中没有encoding参数.所以就自己创建个Filter,如下

import java.io.IOException; 
import javax.servlet.FilterChain; 
import javax.servlet.FilterConfig; 
import javax.servlet.ServletException; 
import javax.servlet.ServletRequest; 
import javax.servlet.ServletResponse; 
import org.apache.struts2.dispatcher.FilterDispatcher; 

public class NewFilterDispatcher extends FilterDispatcher { 

     private static String encoding = "UTF-8"; 

 

        public void init(FilterConfig filterConfig) throws ServletException { 
            super.init(filterConfig); 
            String encodingParam = filterConfig.getInitParameter("encoding"); //获取web.xml下的初始化参数
            if (encodingParam != null && encodingParam.trim().length() != 0) { 
                encoding = encodingParam; 
            } 
        } 

        public void doFilter(ServletRequest request, ServletResponse response, 
                FilterChain chain) throws IOException, ServletException { 
            request.setCharacterEncoding(encoding); //设置request编码格式
     response.setCharacterEncoding(encoding);//设置response编码格式

            super.doFilter(request, response, chain); 
        } 
} 

再在web.xml中进行配置

<filter> 
       <filter-name>struts</filter-name> 
       <filter-class> 
           com.filter.NewFilterDispatcher 
      </filter-class> 
       <init-param> 
            <param-name>encoding</param-name> 
            <param-value>UTF-8</param-value> 
        </init-param> 
   </filter> 
    
    <filter-mapping> 
       <filter-name>struts</filter-name> 
       <url-pattern>/*</url-pattern> 
    </filter-mapping> 

问题解决.