【Spring in action】基于xml配置：在SpringMVC中使用Spring容器

前言：

可能作者的层次较高，并没有考虑到SpringMVC+Spring的配置还有新人自学不知道吧。捂脸！

正文：

一、配置整合springmvc+spring：

1、在src也就是classpath下新建spring-serlvet.xml配置文件，用来配置spring容器的bean：扫描model文件夹下所有。

<?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:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
	<context:component-scan base-package="model"></context:component-scan>  
</beans>

2、在WEB-INF下配置spring-servlet.xml，配置springmvc

<?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:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
	<!-- 配置handlerMapping -->
	<bean class="org.springframework.web.servlet.mvc.support.ControllerBeanNameHandlerMapping"></bean>
	<!-- 配置视图解析器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<!-- 前缀 :说明如果直接放在web-inf下，不需要加前缀-->
		<property name="prefix" value="WEB-INF/view/"></property>
		<!-- 后缀 ： -->
		<property name="suffix" value=".jsp"></property>
	</bean>
	<!-- 加入注解驱动 -->
	<mvc:annotation-driven></mvc:annotation-driven>
	<!-- 扫描器 -->
	<context:component-scan base-package="com.springmvc.controller"></context:component-scan>
</beans>

3、在WEB-INF下配置web.xml，将spring+springmvc整合起来。

<?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>SpringMVC2</display-name>
	<!-- 配置Spring1:配置spring-servlet.xml路劲 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:spring-servlet.xml</param-value>
	</context-param>
	<!-- 配置Spring2:配置Spring监听2 -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<!-- 创建分发Servlet -->
	<servlet>
		<servlet-name>springmvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
	</servlet>
	<servlet-mapping>
		<servlet-name>springmvc</servlet-name>
		<url-pattern>*.do</url-pattern>
	</servlet-mapping>
</web-app>

二、测试springmvc+spring：

1、在src下新建model文件夹，新建user对象：

package model;

import java.io.Serializable;

public class User implements Serializable{
	private int userId;
	private String name;
	public User(int i, String string) {
		this.userId = i;
		this.name = string;
	}
	public int getUserId() {
		return userId;
	}
	public void setUserId(int userId) {
		this.userId = userId;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	@Override
	public String toString() {
		return "User [userId=" + userId + ", name=" + name + "]";
	}
}

2、在model文件夹下新建接口：为什么用接口？因为此处可以通过接口实现自动装配。

package model;

public interface IUserService {
	User getUserById(int userId); 
}

3、在model下写一个接口的实现类：此处可写操作数据库的方法等操作或者业务逻辑。

package model;

import org.springframework.stereotype.Component;

@Component 
public class UserServiceImpl implements IUserService {
	
    @Override  
    public User getUserById(int userId) {  
        return new User(1,"xionghaibo");  
    }  

}

4、写一个index.jsp用来网页请求返回展示:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!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>
	<h1>${helloworld}</h1>
</body>
</html>

5、整合上述所有步骤。在src下新建文件夹com.springmvc.controller，在文件夹下新建controller控制器helloController：

package com.springmvc.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import model.IUserService;

@Controller
public class HelloController {
	@Autowired
	IUserService IUserService;
	//返回到index.jsp	
	@RequestMapping(value="/hello.do")
	public String hello(String userName,Model model){
		System.out.println(userName);
		model.addAttribute("helloworld","hello"+IUserService.getUserById(1));
		return "index";
	}
}

6、目录结构一览：

7、测试结果一览：