springMVC 几种页面跳转方式

你的名字 2021-12-24 09:39 527阅读 0赞

# 1.在注解的方式中 #

## 1.1通过HttpServletResponse的API直接输出（不需要配置渲染器） ##

> controller类的主要代码

@Controller
    
    public class RequestController{
    
     @RequestMapping("/resp")
    
        public void handleRequest(HttpServletRequest req, HttpServletResponse resp) throws Exception {
    
    
             resp.getWriter().println("hello HttpServletResponse");
    
    
    
        }

> web.xml配置

<?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主要代码

## 1.2 使用HttpServletResponse 重定向到另一个视图(其他不变 ) ##

@RequestMapping("/resp")
    
        public void handleRequest(HttpServletRequest req, HttpServletResponse resp) throws Exception {
    
    
            resp.sendRedirect("index.jsp");
    
    
        }
    
    }

## 1.3 使用HttpServletRequest 转发（默认访问/下的index.jsp页面 不受渲染器的影响） ##

@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直接返回jsp页面的名称（无渲染器） ##

> 其他的配置不变

@RequestMapping("/nice")
    
        public String hello1(){
    
            //转发方式1
    
            return "home.jsp";
    
            //转发方式2
    
            return "forward:index.jsp";
    
            //重定向方式
    
            return "redirect:index.jsp";
    
        }

## 1.5当有渲染器指定 ##

@RequestMapping("/nice")
    
        public String hello1(){
    
            //转发方式1
    
            return "home";
    
            //转发方式2
    
            return "forward:index";
    
            //重定向方式  hello指的是requsrmapping
    
            return "redirect:hello";
    
        }

# 2 使用view #

## 2.1 使用modelandview ##

> 需要视图解析器 能指定跳转页面

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();
    
            //封装要显示到视图的数据
    
            mv.addObject("msg","hello myfirst mvc");
    
            //视图名
    
            mv.setViewName("hello");
    
            return mv;
    
    
        }
    
    }

> \[servlet-name\]-servlet.xml

<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"/>
    
        
    
        <property name="prefix" value="/WEB-INF/jsp/"/>
        
    
        <property name="suffix" value=".jsp"/>
    </bean>
    
    
    
        <bean name="/hello.do" class="com.jsu.mvc.HelloController"></bean>

## 2.2 使用modelview ##

> 不需要视图解析器 不能指定跳转页面

//通过modelmap方式
    
        @RequestMapping("/modelmap")
    
        public String modelHello(String name,ModelMap map){
    
            map.addAttribute("name",name);
    
            System.out.println(name);
    
    
            return "index.jsp";
    
        }

转载于:https://www.cnblogs.com/userzf/p/11016352.html