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

<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">
    <!--作用是扫描指定包下所有的包含注解的类-->
    <context:component-scan base-package="com.jsu.mvc"/>
</beans>

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

<!--配置渲染器-->
    <!--配置hellocontroller中页面的位置-->
    <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"/>
    <!--结果视图的前缀-->
    <property name="prefix" value="/WEB-INF/jsp/"/>
    <!--结果视图的后缀-->
    <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";
    }