copyrightresponsewrapper.java

详细讲述Servlet

package com.briup.filter;

import java.io.CharArrayWriter;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;

public class CopyrightResponseWrapper 
			extends HttpServletResponseWrapper {
	// 定义一个buffer，用来存放返回的response信息
	private CharArrayWriter buffer;

	public CopyrightResponseWrapper(HttpServletResponse arg0) {
		super(arg0);
		buffer = new CharArrayWriter();
	}

	@Override
	public PrintWriter getWriter() throws IOException {

		return new PrintWriter(buffer);
	}

	@Override
	public String toString() {
		return buffer.toString();
	}

}