JSP转PDF（字节流方式）

public static String forward(HttpServletRequest request, HttpServletResponse response, String address) {

	try {
		//定义字节流
		final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
		//重写servletOuputStream输出流 为字节流
		final ServletOutputStream servletOuputStream = new ServletOutputStream() {
			@Override
			public void write(int b) throws IOException {
				byteArrayOutputStream.write(b);
			}
		};
		//装饰打印流
		final PrintWriter printWriter = new PrintWriter(new OutputStreamWriter(byteArrayOutputStream, "UTF-8"));

		//重写response输出 皆为字节流
		response = new HttpServletResponseWrapper(response) {
			public ServletOutputStream getOutputStream() {
				return servletOuputStream;
			}
			public PrintWriter getWriter() {
				return printWriter;
			}
		};

		//执行forward操作，使返回结果写字节流数组中
		request.getRequestDispatcher(address).forward(request, response);

		//将字节流中的内容太转为字符串 为jsp转成的html，藉由html转pdf工具进行文件生成
		return new String(byteArrayOutputStream.toByteArray(), "utf-8");
	} catch (Exception e) {
		throw new RuntimeException(e);
	}

}

运用示例：