Java-Response实现重定向

public class Servlet4 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//        重定向的时候，一定要注意路径问题，否则就会出现404
        resp.sendRedirect("/s1/index.jsp");
    }
}

void sendRedirect(String var1) throws IOException;

Status Code：302 重定向
Location：/r/img

public class RedirectServlet extends HttpServlet {
  @Override
  protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    resp.sendRedirect("/r/img");//重定向
//拆分
/*
resp.setHeader("Location","/r/img");
resp.setStatus(302);
*/
  }
  @Override
  protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    doGet(req, resp);
  }
}

      Hello World!
      <%--这里提交的路径需要寻找到项目的路径--%>
      <%--
        pageContext.request.contextPath() 这段代码表示的是当前项目
      --%>
      
        用户名：

        密码：

  <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  
  
    Title
  
    
      Success

public class RequestTest extends HttpServlet {
  @Override
  protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
      System.out.println("进入这个请求");
      //处理请求
      String username = req.getParameter("username");
      String password = req.getParameter("password");
      System.out.println(username+":"+password);
      //重定向一定要注意路径问题
      resp.sendRedirect("/r/success.jsp");
    }
  @Override
  protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    doGet(req, resp);
  }
}

  javax.servlet.jsp
  javax.servlet.jsp-api
  2.3.3
  provided