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" );
}
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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 >
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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 >
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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" );
}
}
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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)
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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);
}
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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
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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" ;
}
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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" ;
}
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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
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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;
}
}
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[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 >
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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
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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" ;
}
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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