SpringMVC -- 梗概--源码--壹--跳转
1.配置web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <display-name></display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <!-- 前端控制器 /=默认的url-pattern /a/b/c /a /a/d/c /a/d /a / *注意：此控制器默认加载/WEB-INF下的xxx-servlet.xml文件 ：其中xxx等于【DispatcherServlet的配置名】 --> <servlet> <servlet-name>mvc61</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:mvc62.xml</param-value> </init-param> <!-- 随项目启动而启动 --> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>mvc61</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- 专治Post请求参数乱码 --> <filter> <filter-name>encoding61</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <!-- 将请求的编码方式设置为utf-8 --> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encoding61</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
2.配置控制器
Class ： JumpController
package com.c61.controller; import java.util.Date; import org.springframework.format.annotation.DateTimeFormat; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.servlet.ModelAndView; import com.c61.entity.User; import com.c61.entity.ValueObject; /** * * @author admin * 收参测试 controller */ @Controller @RequestMapping(value="/mvc2")//等价于namespace public class JumpController { @RequestMapping("/jump1") public String testJump1(){ System.out.println("jump1"); return "forward:/abc.jsp";//转发到 /abc.jsp } @RequestMapping("/jump2") public String testJump2(){ System.out.println("jump2"); return "redirect:/view/abc.jsp";//重定向到 /abc.jsp } /** * 如下两个方法中在进行 C --> C 跳转 * 可以写相对路径或绝对路径 * 但是，进行跨namespace的跳转时，必须要用绝对路径 * @return */ @RequestMapping("/jump3") public String testJump3(){ System.out.println("jump3"); //return "forward:jump1";//转发跳转到jump1中,【jump1】相对路径，相对于当前的namespace //即，【jump1】等价于【/mvc2/jump1】 return "forward:/mvc2/jump1";//转发跳转到/mvc2/jump1中,绝对路径 } @RequestMapping("/jump4") public String testJump4(){ System.out.println("jump4"); //return "redirect:jump2";//重定向跳转到jump1中,【jump2】相对路径，相对于当前的namespace //即，【jump2】等价于【/mvc2/jump2】 //return "redirect:/mvc2/jump2";//重定向跳转到/mvc2/jump2中,绝对路径 return "redirect:/mvc3/jump9"; } //了解 ModelAndView @RequestMapping("/jump5") public ModelAndView testJump5(){ System.out.println("jump5"); ModelAndView mav=new ModelAndView(); mav.addObject("name", "lime"); mav.setViewName("forward:/mvc3/jump9"); return mav; } }
Class ： JumpController2
package com.c61.controller; import java.util.Date; import org.springframework.format.annotation.DateTimeFormat; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import com.c61.entity.User; import com.c61.entity.ValueObject; /** * * @author admin * 收参测试 controller */ @Controller @RequestMapping(value="/mvc3")//等价于namespace public class JumpController2 { @RequestMapping("/jump9") public String testJump1(){ System.out.println("jump9 in mvc3"); return "forward:/abc.jsp";//转发到 /abc.jsp } }
3 配置视图
View : jump.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <form action="${pageContext.request.contextPath}/mvc2/jump1"> <input type="submit" value="提交"/> </form> </body> </html>
View : abc.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> This is my abc JSP page. <br> name:${requestScope.name} </body> </html>
View : /view/abc.jsp
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> This is my abc JSP page. <br> </body> </html>
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