过滤器

web.xml配置：
<filter>
<filter-name>characterEncoding</filter-name>
<filter-class>com.lt.cms.filters.CharaterEncodingFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>characterEncoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

过滤器：
package com.lt.cms.filters;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class CharaterEncodingFilter implements Filter {
public void destroy() {
  // TODO Auto-generated method stub
}
public void doFilter(ServletRequest request, ServletResponse response,
   FilterChain chain) throws IOException, ServletException {
  // TODO Auto-generated method stub
        request.setCharacterEncoding("UTF-8");
        chain.doFilter(request, response);
}
public void init(FilterConfig arg0) throws ServletException {
  // TODO Auto-generated method stub
}
}