前面已經了解了Controller的幾種配置方式
今天主要寫一下響應界面跳轉的幾種方式
1.在注解的方式中
1.1通過HttpServletResponse的API直接輸出(不需要配置渲染器)
controller類的主要代碼
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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主要代碼
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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"> <!--作用是掃描指定包下所有的包含注解的類--> < context:component-scan base-package = "com.jsu.mvc" /> </ beans > |
1.2 使用HttpServletResponse 重定向到另一個視圖(其他不變 )
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@RequestMapping ( "/resp" ) public void handleRequest(HttpServletRequest req, HttpServletResponse resp) throws Exception { resp.sendRedirect( "index.jsp" ); } } |
1.3 使用HttpServletRequest 轉發(默認訪問/下的index.jsp頁面 不受渲染器的影響)
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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頁面的名稱(無渲染器)
其他的配置不變
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@RequestMapping ( "/nice" ) public String hello1(){ //轉發方式1 return "home.jsp" ; //轉發方式2 return "forward:index.jsp" ; //重定向方式 return "redirect:index.jsp" ; } |
1.5當有渲染器指定
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@RequestMapping ( "/nice" ) public String hello1(){ //轉發方式1 return "home" ; //轉發方式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
需要視圖解析器 能指定跳轉頁面
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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(); //封裝要顯示到視圖的數據 mv.addObject( "msg" , "hello myfirst mvc" ); //視圖名 mv.setViewName( "hello" ); return mv; } } |
[servlet-name]-servlet.xml
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<!--配置渲染器--> <!--配置hellocontroller中頁面的位置--> < 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" /> <!--結果視圖的前綴--> < property name = "prefix" value = "/WEB-INF/jsp/" /> <!--結果視圖的后綴--> < property name = "suffix" value = ".jsp" /> </ bean > < bean name = "/hello.do" class = "com.jsu.mvc.HelloController" ></ bean > |
2.2 使用modelview
不需要視圖解析器 不能指定跳轉頁面
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//通過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內容,希望對大家的學習有所幫助,也希望大家多多支持服務器之家。
原文鏈接:http://blog.csdn.net/jsu_9207/article/details/51281027