spring MVC 初探（HelloWorld）

时间 2019-11-12

标签 spring mvc 初探 helloworld 栏目 Spring 繁體版

原文原文链接

一、使用spring MVC 须要导入相关jar包 html

二、web.xml 启用spring MVC java

<servlet>
        <servlet-name>spring3mvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 指定配置文件所在目录src 默认目录在/WEB-INF/ 默认文件名<servlet-name>-servlet.xml -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springMVC.xml</param-value>
        </init-param>
        <!-- 启动就加载 -->
        <load-on-startup>1</load-on-startup>
    </servlet>

  <!-- 拦截全部请求 -->
    <servlet-mapping>
        <servlet-name>spring3mvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

三、编写Controller 使用xml配置文件方式须要继承Controllerweb

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 HelloWorld implements Controller { @Override public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception { String value = "nihao"; //返回视图 参数1为显示页面由于后面配置文件配置了后缀因此这里指须要给出页面名称不须要后缀 
 // 传参使用键值对 参数会绑定到request域 
        return new ModelAndView("/test", "Key", value); } }

四、显示页面test.jspspring

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body>
使用EL表达式取值
Ok!!!!!!!!!!! ${key } </body>

五、spring MVC配置文件单独Controlle配置spring-mvc

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" 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 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd ">
    <bean name="/test" class="com.ly.Controller.HelloWorld"></bean>

    <!-- 定义跳转的文件的先后缀 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
      <!-- 前缀就是指定你的显示页面根目录 -->
        <property name="prefix" value="/" />
        <!-- 后缀给出显示页面后缀 -->
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

六、一个controller编写多个方法须要继承 MultiActionController （一样使用xml配置文件方式）mvc

import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.multiaction.MultiActionController; public class multiController extends MultiActionController { public ModelAndView add(HttpServletRequest request, HttpServletResponse response) throws Exception { System.out.println("add"); return new ModelAndView("/test", "key", "value"); } public ModelAndView update(HttpServletRequest request, HttpServletResponse response) throws Exception { System.out.println("update"); return new ModelAndView("/test", "key", "value"); } }

七、一个controller 编写多个方法配置文件配置app

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" 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 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd ">
    <bean name="/testc" class="com.ly.Controller.multiController">
        <property name="methodNameResolver" ref="methodNameResolver"></property>
    </bean>

    <!-- 一个controller 编写多个方法 解析 -->
    <bean id="methodNameResolver" class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver">
        <property name="paramName" value="action"></property>
    </bean>

    <!-- 添加注解驱动 -->
    <mvc:annotation-driven />
    <!-- 定义跳转的文件的先后缀 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
      <!-- 前缀就是指定你的显示页面根目录 -->
        <property name="prefix" value="/" />
        <!-- 后缀给出显示页面后缀 -->
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

spring MVC 初探 （HelloWorld）

spring MVC 初探（HelloWorld）