appenderfilter.java

达内JAVA培训-WEB课程部分项目源代码

package cn.com.tarena.web.servlet.day5;

import java.io.PrintWriter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;

public class AppenderFilter extends BaseFilter {
	
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws java.io.IOException, ServletException {
				
		MyResponse myResponse = new MyResponse((HttpServletResponse)response);
		
		chain.doFilter(request, myResponse);
		
		String str = myResponse.toString();
		
		StringBuffer strBf = new StringBuffer();
		
		strBf.append(str.substring(0, str.lastIndexOf("</body>")));
		strBf.append("<br>" + config.getInitParameter("WORDS"));
		strBf.append(str.substring(str.lastIndexOf("</body>"), str.length()));
		
		PrintWriter out = response.getWriter();
		
		out.println(strBf.toString());
		
		out.close();
		
		
	}
}