一个普通字符编码过滤器例子

代码如下：

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import javax.servlet.*; import java.io.IOException; /** * 用于设置 HTTP 请求字符编码的过滤器，通过过滤器参数encoding指明使用何种字符编码,用于处理Html Form请求参数的中文问题 */ public class CharacterEncodingFilter implements Filter { protected FilterConfig filterConfig = null; protected String encoding = ""; public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {         if(encoding != null)          servletRequest.setCharacterEncoding(encoding);          filterChain.doFilter(servletRequest, servletResponse); } public void destroy() {    filterConfig = null;    encoding = null; } public void init(FilterConfig filterConfig) throws ServletException {           this.filterConfig = filterConfig;           this.encoding = filterConfig.getInitParameter("encoding"); } }

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