springmvc-初次接触

一，mvc做的事情

　　1，将url映射到java类或者java的方法。

　　2，封装用户提交的数据

　　3，处理请求--调用相关的业务处理--封装想相应的数据

　　4，将相应数据进行渲染，jsp或者html

二，spring mvc是一个轻量级的，基于请求响应的mvc框架。

三，为什么要学mvc

　　1，性能比struts2好，开发效率高，性能不高

　　2，简单，便捷，开发简单

　　3，天生和spring无缝集成，核心功能（ioc和aop）

　　4，使用约定优于配置

　　5，能够进行简单的junit测试

　　6，支持restful风格

　　7，异常处理

　　8，本地化

　　9，数据验证，类型转换等

　　10，有拦截器

springMVC 工作流程

页面请求----》控制器（Controller DispatcherServlet）----》请求委托-----》处理器（XXController 实际类） ---->业务处理

（HandlerMapping 、 HandlerAdaper 结合后将url映射到处理器）

处理器 ----> 返回ModelAndView ----> 控制器 -----> 传递ModelAndView到 -----> 视图渲染器

视图渲染器 ----> 返回 -----> 控制器 -----> 响应页面

使用步骤

导入jar

配置web.xml文件

在web-inf下添加springmvc配置文件 [DispatcherServletName]-servlet.xml文件例如 springmvc-servlet.xml

头文件

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:mvc="http://www.springframework.org/schema/mvc"

    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

        https://www.springframework.org/schema/beans/spring-beans.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context.xsd

        http://www.springframework.org/schema/mvc

        https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- <mvc:annotation-driven/> -->

</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">

  <display-name>spring-mvc_hello</display-name>

  <servlet>

      <servlet-name>springmvc</servlet-name>

      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

      <load-on-startup>1</load-on-startup>

  </servlet>

  <servlet-mapping>

      <servlet-name>springmvc</servlet-name>

      <url-pattern>*.do</url-pattern>

  </servlet-mapping>

  <welcome-file-list>

    <welcome-file>index.html</welcome-file>

    <welcome-file>index.htm</welcome-file>

    <welcome-file>index.jsp</welcome-file>

    <welcome-file>default.html</welcome-file>

    <welcome-file>default.htm</welcome-file>

    <welcome-file>default.jsp</welcome-file>

  </welcome-file-list>

</web-app>

springmvc-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:mvc="http://www.springframework.org/schema/mvc"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="

        http://www.springframework.org/schema/beans

        https://www.springframework.org/schema/beans/spring-beans.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context.xsd

        http://www.springframework.org/schema/mvc

        https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 配置handler-mappering -->

    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>

    <!-- 配置handler-Adapter -->

    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>

    <!-- 配置渲染器 -->

    <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">

        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>

        <!-- 渲染名称 试图的前缀 -->

        <property name="prefix" value="/WEB-INF/jsp/"/>

        <!-- 渲染名称 试图的后缀 -->

        <property name="suffix" value=".jsp"/>

    </bean>

    <!-- 配置请求 和 处理器 -->

    <bean name="/hello.do" class="cn.zys.controller.HelloController"></bean>

    <!-- <mvc:annotation-driven/> -->

</beans>

HelloController.java

package cn.zys.controller;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.mvc.Controller;

public class HelloController implements Controller{

    @Override

    public ModelAndView handleRequest(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {

        // TODO Auto-generated method stub

        ModelAndView mv =new ModelAndView();

        mv.addObject("msg", "hello spring");

        mv.setViewName("hello");

        return mv;

    }

}

测试地址: http://127.0.0.1:8080/spring-mvc_hello/hello.do

注解springmvc开发----------------------------------------------------------------------------------------------

导入jar

commons-logging-1.1.1.jar
jstl.jar
spring-aop-5.1.9.RELEASE.jar
spring-beans-5.1.9.RELEASE.jar
spring-context-5.1.9.RELEASE.jar
spring-core-5.1.9.RELEASE.jar
spring-expression-5.1.9.RELEASE.jar
spring-web-5.1.9.RELEASE.jar
spring-webmvc-5.1.9.RELEASE.jar

web.xml配置

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">

  <display-name>spring-mvc_zhujie</display-name>

  <servlet>

      <servlet-name>springmvc</servlet-name>

      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

      <init-param>

          <param-name>contextConfigLocation</param-name>

          <param-value>classpath:mvc.xml</param-value>

      </init-param>

      <load-on-startup>1</load-on-startup>

  </servlet>

  <servlet-mapping>

      <servlet-name>springmvc</servlet-name>

      <url-pattern>*.do</url-pattern>

  </servlet-mapping>

  <welcome-file-list>

    <welcome-file>index.html</welcome-file>

    <welcome-file>index.htm</welcome-file>

    <welcome-file>index.jsp</welcome-file>

    <welcome-file>default.html</welcome-file>

    <welcome-file>default.htm</welcome-file>

    <welcome-file>default.jsp</welcome-file>

  </welcome-file-list>

</web-app>

HelloController.java

package cn.zys.controller;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.servlet.ModelAndView;

@Controller

public class HelloController {

    @RequestMapping("/hello")

    public ModelAndView hello(HttpServletRequest req,HttpServletResponse resp){

        ModelAndView vm = new ModelAndView();

        //封装要显示在试图上的数据

        vm.addObject("msg","hello spring");

        //封装视图数据名称

        vm.setViewName("hello");

        return vm;

    }

}

mvc.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:mvc="http://www.springframework.org/schema/mvc"

    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

        https://www.springframework.org/schema/beans/spring-beans.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context.xsd

        http://www.springframework.org/schema/mvc

        https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 配置渲染器 -->

    <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">

        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>

        <!-- 渲染名称 视图的前缀 -->

        <property name="prefix" value="/WEB-INF/jsp/"/>

        <!-- 渲染名称 视图的后缀 -->

        <property name="suffix" value=".jsp"/>

    </bean>

     <!-- spring扫描的包 -->

    <context:component-scan base-package="cn.zys.controller"></context:component-scan>

    <!-- <mvc:annotation-driven/> -->

</beans>

测试地址 http://127.0.0.1:8080/spring-mvc_zhujie/hello.do

Controller 几种配置

1，为url分配bean

2，为url匹配bean

巴特西

springmvc-初次接触

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