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java的各种跳转总结，见下面代码及注释（最后一种实现保存cookie的重定向）

package com.jhk.site.web;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;/** * 测试 *  * @author sun_guodong * @date 2018年9月5日 */@Controllerpublic class Test {	/**	 * 重定向	 * 	 * @param request	 * @param respond	 * @return	 */	@RequestMapping("/test1")	public String test1(HttpServletRequest request, HttpServletResponse respond) {		return "redirect:http://www.baidu.com";	}	/**	 * 请求转发到 /test2/test	 * 	 * @param request	 * @param respond	 * @return	 */	@RequestMapping("/test2")	public String test2(HttpServletRequest request, HttpServletResponse respond) {		return "forward:/test";	}	/**	 * 等同于第一种情况	 * 	 * @param request	 * @param respond	 * @throws IOException	 */	@RequestMapping("/test3")	public void test3(HttpServletRequest request, HttpServletResponse respond) throws IOException {		respond.getWriter().print("redirect:http://www.baidu.com");	}	/**	 * 等同于第一种情况	 * 	 * @param request	 * @param respond	 * @throws IOException	 */	@RequestMapping("/test4")	public void test4(HttpServletRequest request, HttpServletResponse respond) throws IOException {		respond.sendRedirect("http://www.baidu.com");	}	/**	 * 请求转发	 * 	 * @param request	 * @param respond	 * @throws IOException	 * @throws ServletException	 */	@RequestMapping("/test5")	public void test5(HttpServletRequest request, HttpServletResponse respond) throws IOException, ServletException {		request.getRequestDispatcher("/success.html").forward(request, respond);	}	/**	 * 重定向保存cookie的方法	 * 	 * @param request	 * @param respond	 * @throws IOException	 * @throws ServletException	 */	@RequestMapping("/test6")	public void test6(HttpServletRequest request, HttpServletResponse respond) throws IOException, ServletException {		request.setAttribute("authUserId", "");		Cookie cookie = new Cookie("", "");		cookie.setMaxAge(2);		cookie.setPath("/");		cookie.setDomain("bigbigwork.com");		respond.addCookie(cookie);		String html = "";		respond.getWriter().print(html);	}}

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