jsp页面赋值乱码问题 及 j2ee容器filter的写法例子[z]

From: http://topic.csdn.net/u/20071214/10/dfff3ed3-f8f9-47a3-93f3-3605581da097.html

spring里面有字符过滤器,很好用.只需要一个配置. 
<filter> 
<filter-name> CharacterEncodingFilter </filter-name> 
<display-name> CharacterEncodingFilter </display-name> 
<filter-class> 
org.springframework.web.filter.CharacterEncodingFilter 
</filter-class> 
<init-param> 
<param-name> encoding </param-name> 
<param-value> GBK </param-value> 
</init-param> 
<init-param> 
<param-name> forceEncoding </param-name> 
<param-value> true </param-value> 
</init-param> 
</filter> 
<filter-mapping> 
<filter-name> CharacterEncodingFilter </filter-name> 
<url-pattern> /* </url-pattern> 
</filter-mapping> 

Java code
public class CharactorEncodingFilter implements Filter {

    private String charactorEncoding;
    
    private static final String CHARACTOR_ENCODING_PARAMETER_NAME = "charactorEncoding";
    
    @Override
    public void destroy() {
        //什么也不用做。
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) 
            throws IOException, ServletException {
        request.setCharacterEncoding(this.charactorEncoding);
        response.setCharacterEncoding(this.charactorEncoding);
        chain.doFilter(request, response);
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        this.charactorEncoding = filterConfig.getInitParameter(CHARACTOR_ENCODING_PARAMETER_NAME);
    }
    
}




这个是web.xml的配置： 

XML code
    <filter>
        <description>处理中文化问题</description>
        <filter-name>charactorEncodingFilter</filter-name>
        <filter-class>
            cn.com.gxlu.fiberscheduler.web.util.CharactorEncodingFilter
        </filter-class>
        <init-param>
            <param-name>charactorEncoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>charactorEncodingFilter</filter-name>
        <url-pattern>*.do</url-pattern>
    </filter-mapping>