Spring+SpringMVC+mybatis的整合（一） spring和springmvc的整合

简介:
SSM（Spring+SpringMVC+MyBatis）框架集由Spring、SpringMVC、MyBatis三个开源框架整合而成，常作为数据源较简单的web项目的框架。
本人的开发环境:
Tomcat版本8.0 servlet3.0 eclipse

一.spring与springMVC的整合

springMVC只能扫描Controller注解，spring扫描Service、repository、Component、AOP的相关注解。
1.1 jar包的准备，spring、springMVC、jackson、fileupload、aop相关的jar
1.2 创建springMVC的配置文件,springMVC-config.xml

注意点：spring是父容器,springMVC子容器。如果把Controller、Service、Repository、等注解都交给springMVC来管理，那么spring的aop功能失效。
如果由spring来加载配置文件，则requestMapping注解全失效，则没有核心控制器概念。
由此引入分工，springMVC来加载Controller，spring加载其他。

具体约束xsd自行官网帮助文档复制
在springMVC-config.xml和spring-config.xml文件中对context:component-scan标签进行配置

<!-- springMVC的配置文件 -->
<!-- 包扫描，支持注解,扫描指定包以及子包下的所有Controller、Service、repository、Component注解
        use-default-filters属性：默认为true，扫描所有
        context:include-filter:只扫描Controller注解 -->
    <context:component-scan
        base-package="com.javasm" use-default-filters="false">
        <context:include-filter type="annotation"
            expression="org.springframework.stereotype.Controller" />
    </context:component-scan>
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spring配置部分较少，配置好包扫描，aop，自动装配和spring-mybatis的配置就差不多了

<!-- spring配置 -->
<!-- 包扫描，支持注解,扫描指定包以及子包下的所有Controller、Service、repository、Component注解 
        use-default-filters属性：默认为true，扫描所有 
        希望spring扫描Controller注解以外的所有 -->
    <context:component-scan
        base-package="com.javasm" annotation-config="true">
        <context:exclude-filter type="annotation"
            expression="org.springframework.stereotype.Controller" />
    </context:component-scan>
<!-- aop的配置 -->
    <aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy>
<!-- 自动装配  扫描Resource/AutoWired-->
    <context:annotation-config></context:annotation-config>
<!--  嵌入spring-mybatis-->
     <import resource="classPath:spring-mybatis.xml"/> 
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springMVC部分：包扫描，静态文件，mvc:annotation-driven标签（在此标签内配置json的转换器，spring5以上的版本，需要jackson2.9版本以上），文件上传的配置，视图解析器

<!-- springMVC的配置文件 -->
    <!-- 包扫描，支持注解,扫描指定包以及子包下的所有Controller、Service、repository、Component注解
        use-default-filters属性：默认为true，扫描所有
        context:include-filter:只扫描Controller注解 -->
    <context:component-scan
        base-package="com.javasm" use-default-filters="false">
        <context:include-filter type="annotation"
            expression="org.springframework.stereotype.Controller" />
    </context:component-scan>
    <!-- 处理静态文件加载 -->
    <mvc:resources location="/resource/"
        mapping="/resource/**"></mvc:resources>
    <!-- 自动把 RequestMappingHandlerMapping，RequestMappingHandlerAdapter加入springMVC容器，支持mvc注解。 -->
    <mvc:annotation-driven>
        <!-- 配置json的转换器 -->
        <mvc:message-converters>
            <bean
                class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                <property name="objectMapper">
                    <bean class="com.fasterxml.jackson.databind.ObjectMapper"></bean>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>    

    <!-- 文件上传的配置 id必须是multipartResolver -->
    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="30000000"></property>
        <property name="defaultEncoding" value="utf-8"></property>
        <property name="uploadTempDir" value="upload/temp"></property>
    </bean>

    <!-- 视图解析器 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/view/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
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同时，在web.xml中需配置springmvc的核心控制器和用于加载spring-config.xml的监听器

<?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_3_0.xsd" id="WebApp_ID" version="3.0">

  <context-param>
    <param-name>log4jConfiguration</param-name>
    <param-value>classpath:log4j2.xml</param-value>
  </context-param>

  <!-- 监听器,加载spring-config.xml -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring-config.xml</param-value>
  </context-param>
  <!-- 过滤器,编码格式 -->
  <filter>
    <filter-name>characterEncoding</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>utf-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>characterEncoding</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <!-- springMVC核心控制器配置 -->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springMVC-config.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>
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然后就可以编写测试类测Controller、Resource了
实体类：

public class User {
    private Integer uid;
    private String username;
    private String password;
    public User() {
        super();
        // TODO Auto-generated constructor stub
    }
    public User( String username, String password) {
        super();
        this.username = username;
        this.password = password;
    }
    public Integer getUid() {
        return uid;
    }
    public void setUid(Integer uid) {
        this.uid = uid;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "User [uid=" + uid + ", username=" + username + ", password=" + password + "]";
    }
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在springmvc的视图解析器配置对应的目录下写个测试用的页面

<%@ 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>
    登录成功
</body>
</html>
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编写对应的controller和service

//service接口
public interface IUserService {
    public void userLogin(String username,String password);
}
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//service实现类
@Service
public class UserServiceImpl implements IUserService{

    //@Resource
    //private IUserDao ud;


    @Override
    public void userLogin(String username, String password) {
        System.out.println("111");
    }
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@Controller
@RequestMapping("/user")
public class UserController {
    @Resource
    private IUserService us;

    @RequestMapping("/login")
    public String login(String username,String password,HttpSession session) {
        us.userLogin(username, password);
        return "welcome";

    }
}
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