怎么写过滤器？？新手没有写过

package com.wk.filters;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*; // For Date class

/** Simple filter that prints a report on the standard output
* each time an associated servlet or JSP page is accessed.
*/

public class ReportFilter implements Filter {
private String charset = "UTF-8";
public void doFilter(ServletRequest request，
ServletResponse response，
FilterChain chain)
throws ServletException， IOException {
request.setCharacterEncoding(charset);
response.setCharacterEncoding(charset);
chain.doFilter(request， response);

}

public void init(FilterConfig config)
throws ServletException {
}

public void destroy() {}
}

web.xml的配置


Reporter

com.wk.filters.ReportFilter





Reporter
/*拦截所有的请求

这样就可以了。如果不行多给我一点信息，帮你解决。希望对你有帮助。