//**********************************************// /* * TODO 字符编码过滤器 */ package summer.admin; import javax.servlet.FilterChain; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import java.io.IOException; import javax.servlet.Filter; import javax.servlet.http.*; import javax.servlet.ServletException; import javax.servlet.FilterConfig; /** * @author Coldrain * TODO 字符编码过滤器 */ public class EncodingFilter implements Filter{ protected FilterConfig filterConfig; private String targetEncoding = "gb2312"; /** *初始化过滤器,和一般的Servlet一样,它也可以获得初始参数。 */ public void init(FilterConfig config) throws ServletException { this.filterConfig = config; if(config.getInitParameter("encoding") !=null){ this.targetEncoding = config.getInitParameter("encoding"); } } /** *进行过滤处理,这个方法最重要,所有过滤处理的代码都在此实现。 */ public void doFilter(ServletRequest srequest, ServletResponse sresponse, FilterChain chain) throws IOException, ServletException { System.out.println("使用以下方法对请求进行编码:encoding="+targetEncoding); HttpServletRequest request = (HttpServletRequest)srequest; request.setCharacterEncoding(targetEncoding); chain.doFilter(srequest,sresponse); // 把处理权发送到下一个 } public void setFilterConfig(final FilterConfig filterConfig) { this.filterConfig=filterConfig; } //销毁过滤器 public void destroy() { this.filterConfig=null; } } //************************************************************************// |