encodefilter.java

自定义架构仿struts+command循环调用版

package accp.filter;

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;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class EncodeFilter implements Filter {
  private String targetEncoding;

  public void init(FilterConfig config) throws ServletException {
    this.targetEncoding = config.getInitParameter("encoding");
  }

  public void destroy() {
    targetEncoding = null;
  }
  /**
   * 测试不使用过滤器前，jsp必须加request.setCharacterEncoding()
   */
	public void doFilter(ServletRequest req, ServletResponse res,
	    FilterChain chain) throws IOException, ServletException {
		final String CONTENT_TYPE = "text/html; charset=GBK";
		res.setContentType(CONTENT_TYPE);
		req.setCharacterEncoding(targetEncoding);
		chain.doFilter(req, res);
	}

}