Spring mvc 页面跳转方式

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

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