Spring-MVC-白红宇

Spring-MVC

阅读量：6302 次

发布时间：2019-06-22

本文共 9269 字，大约阅读时间需要 30 分钟。

结构：

pom.xml：


         
      
       4.0.0
          
      
       com.spring
          
      
       HelloSpringMVC
          
      
       war
          
      
       0.0.1-SNAPSHOT
          
      
       HelloSpringMVC Maven Webapp
          
      
       http://maven.apache.org
          
              
                   
        
         junit
                    
        
         junit
                    
        
         3.8.1
                    
        
         test
                
               
               
               
                   
        
         javax.servlet
                    
        
         javax.servlet-api
                    
        
         3.1.0
                    
        
         provided
                
               
               
               
                   
        
         org.springframework
                    
        
         spring-core
                    
        
         4.1.4.RELEASE
                
               
               
                   
        
         org.springframework
                    
        
         spring-web
                    
        
         4.1.4.RELEASE
                
               
               
                   
        
         org.springframework
                    
        
         spring-webmvc
                    
        
         4.1.4.RELEASE
                
           
          
              
       
        HelloSpringMVC
               
                            
                    
                    
                        
         
          org.apache.tomcat.maven
                         
         
          tomcat7-maven-plugin
                         
         
          2.2

xsi全名：xml schema instance

web-app是web.xml的根节点标签名称

version是版本的意思

xmlns是web.xml文件用到的命名空间

xmlns:xsi是指web.xml遵守xml规范

xsi:schemaLocation是指具体用到的schema资源

参考：http://www.cnblogs.com/zhao1949/p/5652167.html

web.xml：


            
      
       HelloWorldSpring
             
             
       
        spring-mvc
              
       
                   org.springframework.web.servlet.DispatcherServlet       
              
       
        1
          
                
             
       
        spring-mvc
              
       
        /
          
           
         
         
             
       
        contextConfigLocation
              
       
        /WEB-INF/root-context.xml
          
               
         
             
       
        org.springframework.web.context.ContextLoaderListener

DispatcherServlet是前置控制器，配置在web.xml文件中的。拦截匹配的请求，Servlet拦截匹配规则要自已定义，把拦截下来的请求，依据相应的规则分发到目标Controller来处理，是配置spring MVC的第一步

spring-mvc-servlet.xml：


     
         
             
             
      
       //视图名称解析器               
                  
        
         /WEB-INF/pages/
        
               
               
        　　　　
        
        
         .jsp

root-context.xml：

HelloWorldController.java：

package com.spring.mvc;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping; @Controller //负责注册一个bean 到spring 上下文中public class HelloWorldController {     @RequestMapping("/hello")//注解为控制器指定可以处理哪些 URL 请求    public String hello(Model model) {                 model.addAttribute("hello", "哈喽 Spring MVC!");                 return"helloworld";             } }

index.jsp：

Hello World!

运行应用程序之前，需要构建整个项目。

右键单击该项目并选择：

Run As/Maven install

运行配置：

Run HelloSpringMVC

${workspace_loc:/HelloSpringMVC}

tomcat7:run

然后运行

访问http://localhost:8080/HelloSpringMVC/

访问http://localhost:8080/HelloSpringMVC/hello

--------------------------------完毕-------------------------------

修改HelloWorldController.java

package com.spring.mvc;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping; @Controllerpublic class HelloWorldController {     @RequestMapping("/hello")    public String hello(Model model) {                 model.addAttribute("hello", "哈喽 Spring MVC!");                 return"helloworld";             }    //在方法中使用 HttpServletRequest, HttpServletResponse     @RequestMapping("/requestResponse")    public String requestResponseExample(HttpServletRequest request,            HttpServletResponse reponses, Model model) {                model.addAttribute("hello", "哈喽 requestResponse");        return "helloworld";    } }

访问http://localhost:8080/HelloSpringMVC/requestResponse

--------------------------------完毕-------------------------------

重定向到另一页面

修改HelloWorldController.java

package com.spring.mvc;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod; @Controllerpublic class HelloWorldController {     @RequestMapping("/hello")    public String hello(Model model) {                 model.addAttribute("hello", "/hi被redirect到了/hello");                 return"helloworld";             }        @RequestMapping("/requestResponse")    public String requestResponseExample(HttpServletRequest request,            HttpServletResponse reponses, Model model) {                model.addAttribute("hello", "哈喽 requestResponse");        return "helloworld";    }        @RequestMapping(value = "/hi", method = RequestMethod.GET)    public String hi(Model model) {                return "redirect:/hello";    } }

访问http://localhost:8080/HelloSpringMVC/hi

地址会变成http://localhost:8080/HelloSpringMVC/hello

--------------------------------完毕-------------------------------

新增RequestParamExampleController.java

package com.spring.mvc;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam; @Controllerpublic class RequestParamExampleController {         @RequestMapping("/user")    public String userInfo(Model model,            @RequestParam(value = "name", defaultValue = "Guest") String name) {         model.addAttribute("name", name);         if("admin".equals(name)) {            model.addAttribute("age", "18");        } else{            model.addAttribute("age", "0");        }        return "userInfo";    }  }

新增userInfo.jsp:

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"    pageEncoding="ISO-8859-1"%>
     Insert title here    ${name}
     Age: ${age}

访问http://localhost:8080/HelloSpringMVC/user：

访问http://localhost:8080/HelloSpringMVC/user?name=admin

--------------------------------完毕-------------------------------

添加PathVariableExampleController.java

package com.spring.mvc;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping; @Controllerpublic class PathVariableExampleController {       /**     * @PathVariable Example:     *     */    @RequestMapping("/web/fe/{sitePrefix}/{language}/document/{id}/{naturalText}")//URI模板

public String documentView(Model model, @PathVariable(value = "sitePrefix") String sitePrefix, @PathVariable(value = "language") String language, @PathVariable(value = "id") Long id, @PathVariable(value = "naturalText") String naturalText) { model.addAttribute("sitePrefix", sitePrefix); model.addAttribute("language", language); model.addAttribute("id", id); model.addAttribute("naturalText", naturalText); String documentName = "love"; if(id == 888) { documentName = "love888"; } model.addAttribute("documentName", documentName); return "documentView"; } }

添加documentView.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%>
     Insert title here    ${documentName}
    Site Prefix: ${sitePrefix}    
 Language: ${language}    
 ID: ${id}    
 Natural Text: ${naturalText}

访问http://localhost:8080/HelloSpringMVC/web/fe/love/you/document/000/spring-mvc

访问http://localhost:8080/HelloSpringMVC/web/fe/love/you/document/888/spring-mvc

--------------------------------完毕-------------------------------

使用@ResponseBody和方法返回字符串

新增ResponseBodyExample1Controller.java

package com.spring.mvc;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody; @Controllerpublic class ResponseBodyExample1Controller {     // Simple example, method returns String.    @RequestMapping(value = "/ResponseBody")    @ResponseBody    public String authorInfo(Model model) {        return "I love you";    }      }

访问http://localhost:8080/HelloSpringMVC/ResponseBody