Summary of springMVC several page jump methods
- 2020-06-12 08:57:54
- OfStack
You've seen several ways to configure Controller
Today mainly write 1 response interface jump several ways
1. In the form of annotations
1.1 Direct output via API (no need to configure renderer)
The main code for the controller class
@Controller
public class RequestController{
@RequestMapping("/resp")
public void handleRequest(HttpServletRequest req, HttpServletResponse resp) throws Exception {
resp.getWriter().println("hello HttpServletResponse");
}
web. xml configuration
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
dispatcher-servlet.xml main code
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<!-- Scans all classes that contain annotations under the specified package -->
<context:component-scan base-package="com.jsu.mvc"/>
</beans>
1.2 Redirect to another view using HttpServletResponse (nothing else)
@RequestMapping("/resp")
public void handleRequest(HttpServletRequest req, HttpServletResponse resp) throws Exception {
resp.sendRedirect("index.jsp");
}
}
1.3 Forward using HttpServletRequest (index. jsp page under default access/is not affected by renderer)
@RequestMapping("/resp")
public void handleRequest(HttpServletRequest req, HttpServletResponse resp) throws Exception {
req.setAttribute("message","it's forword ");
req.getRequestDispatcher("index.jsp").forward(req,resp);
}
1.4 Directly returns the name of the jsp page (no renderer)
Other configurations remain the same
@RequestMapping("/nice")
public String hello1(){
// Way forward 1
return "home.jsp";
// Way forward 2
return "forward:index.jsp";
// Redirect mode
return "redirect:index.jsp";
}
1.5 When there is a renderer specified
@RequestMapping("/nice")
public String hello1(){
// Way forward 1
return "home";
// Way forward 2
return "forward:index";
// Redirect mode hello Refers to the requsrmapping
return "redirect:hello";
}
2 use view
2.1 use modelandview
The view parser is required to specify jump pages
public class HelloController implements Controller {
@Override
public ModelAndView handleRequest(javax.servlet.http.HttpServletRequest httpServletRequest,
javax.servlet.http.HttpServletResponse httpServletResponse) throws Exception {
ModelAndView mv = new ModelAndView();
// Encapsulates the data to display into the view
mv.addObject("msg","hello myfirst mvc");
// View name
mv.setViewName("hello");
return mv;
}
}
[servlet-name]-servlet.xml
<!-- Configure renderer -->
<!-- configuration hellocontroller The location of the page in -->
<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<!-- The prefix for the result view -->
<property name="prefix" value="/WEB-INF/jsp/"/>
<!-- The suffix for the result view -->
<property name="suffix" value=".jsp"/>
</bean>
<bean name="/hello.do" class="com.jsu.mvc.HelloController"></bean>
2.2 use modelview
The view parser cannot specify a jump page without a view parser
// through modelmap way
@RequestMapping("/modelmap")
public String modelHello(String name,ModelMap map){
map.addAttribute("name",name);
System.out.println(name);
return "index.jsp";
}