import?javax.servlet.Filter;
import?javax.servlet.FilterChain;
import?javax.servlet.ServletRequest;
import?javax.servlet.ServletResponse;
import?java.io.IOException;
import?javax.servlet.http.HttpServletRequest;
import?javax.servlet.ServletException;
import?javax.servlet.FilterConfig;
public?class?EncodingFilter?implements?Filter?{
????
?????protected?FilterConfig?filterConfig;
?????private?String?targetEncoding?=?"gb2312";
????????
????????public?void?init(FilterConfig?config)?throws?ServletException?{
????????????this.filterConfig?=?config;
????????????this.targetEncoding?=?config.getInitParameter("encoding");
????????}
????????
?????????public??void?doFilter(ServletRequest?srequest,?ServletResponse??sresponse,?FilterChain?chain)
????????????throws?IOException,?ServletException?{
????????????//System.out.println("使用以下方法對請求進行編碼：encoding="+targetEncoding);
????????????????
????????????HttpServletRequest?request?=?(HttpServletRequest)srequest;
????????????request.setCharacterEncoding(targetEncoding);
????????????chain.doFilter(srequest,sresponse);??
????????}???
????????public?void?setFilterConfig(final?FilterConfig?filterConfig)
????????{
????????????this.filterConfig=filterConfig;
????????}
????????public?void?destroy()
????????{
????????????this.filterConfig=null;
????????}
}
在WEB-INF/web.xml下面配置
???<filter>
????<filter-name>EncodingFilter</filter-name>
????<filter-class>com.david.common.sys.EncodingFilter</filter-class>
????<init-param>
??????<param-name>encoding</param-name>
??????<param-value>gb2312</param-value>
????</init-param>
??</filter>
??<filter-mapping>
????<filter-name>EncodingFilter</filter-name>
????<url-pattern>/*</url-pattern>
??</filter-mapping>