servlet1执行完毕后重定向servlet2 语法： response.senRedirect(String path); 代码：两个servlet，由servlet1重定向（resp.sendRedirect(“/send/s2”);）到servlet2中，访问servlet1观察结果小结： 1）浏览器地址栏的路径发生改变，变化为目标资源路径。 2）发送了两个请求 3）因为是不同的请求，所以不会共享数据。比如servlet1中有id参数，servlet2中不能接收到 4）最终页面响应输出由servlet2来控制。 5）不加斜线找的是相对路径。常用绝对路径。 6）允许跨域跳转resp.sendRedirect(“http://www.baidu.com”); 7）不能访问WEB-INF中的资源
就相当于把目标的URL拷贝到浏览器然后访问
@WebServlet("/send/s1")
public class SendRedirectServlet extends HttpServlet{
private static final long serialVersionUID = 1L;
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
resp.setContentType("text/html;charset=utf-8");
PrintWriter out = resp.getWriter();
System.out.println("servlet1 log ...");
out.print("servlet1...web...before<br>");
//重定向
resp.sendRedirect("/send/s2");
System.out.println("servlet 1 ... after");
out.print("servlet1...web...after");
out.print("<br> servlet1...forword...after");
}
}
@WebServlet("/send/s2")
public class SendRedirectServlet2 extends HttpServlet{
private static final long serialVersionUID = 1L;
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
resp.setContentType("text/html;charset=utf-8");
PrintWriter out = resp.getWriter();
System.out.println("servlet2 log ...");
//请求转发
out.print("servlet2...web...");
out.print(req.getParameter("name"));
}
}