javafilter

package filter; import java.io.IOException; import javax.servlet.*; public class EncodingFilter implements Filter { protected String encoding = null; protected FilterConfig config; public void init(FilterConfig filterConfig) throws ServletException { this.config = filterConfig; // 得到在web.xml中配置的编码 this.encoding = filterConfig.getInitParameter("Encoding"); } public void doFilter( ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { if (request.getCharacterEncoding() == null) { // 得到指定的编码 String encode = getEncoding(); if (encode != null) { //设置request的编码 request.setCharacterEncoding(encode); response.setCharacterEncoding(encode); } } chain.doFilter(request, response); } protected String getEncoding() { return encoding; } public void destroy() { } }