前面已经了解了Controller的几种配置方式
今天主要写一下响应界面跳转的几种方式
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
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@Controller public class RequestController{ @RequestMapping ( "/resp" ) public void handleRequest(HttpServletRequest req, HttpServletResponse resp) throws Exception { resp.getWriter().println( "hello HttpServletResponse" ); } |
web.xml配置
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<? 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
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< 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 )
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@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)
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@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
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@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
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@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
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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
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<!--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
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//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" ; } |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://blog.csdn.net/jsu_9207/article/details/51281027