SSM-learning

架构流程图：

第一步：建立spring框架；

包括：建立所需要的dao层，sevice层和controller层和实体类，建立spring配置文件，配置自动扫描bean

AccountDao：

@Repository
public interface AccountDao {
   @Select("select * from account where id = 1")
   Account findAll() ;
}

Account:

package com.quan.model;

import javax.annotation.Resource;

@Resource
public class Account {
    private Integer id;
    private Integer uid;
    private Double money;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public Integer getUid() {
        return uid;
    }

    public void setUid(Integer uid) {
        this.uid = uid;
    }

    public Double getMoney() {
        return money;
    }

    public void setMoney(Double money) {
        this.money = money;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", uid=" + uid +
                ", money=" + money +
                '}';
    }
}

AcountService

public interface AccountService {
   Account findAll();
}

AcountServiceImp

@Service
public class AcountServiceImp  implements AccountService{
    @Autowired
    private AccountDao accountDao;

    @Override
    public Account findAll() {
       Account account =accountDao.findAll();
       System.out.println(account);
        System.out.println("springMVC-done.....");
        return account;
    }
}

spring-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
            http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/mvc/spring-aop.xsd
">

    <context:component-scan base-package="com.quan">
<!--        配置需要忽略的注解，controller 让spingmvc配置文件去配置-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

spring的配置文件主要是，除了springMVC需要配置的扫描controller的注解，其他都需要在这里配置

建议没实现一个框架的配置，都进行简单的验证

第二部，实现springMVC配置：
配置web.xml文件，实现过滤器，核心处理器，中文乱码过滤

<!--  spring-MVC的配置，-->
  <servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>
      org.springframework.web.servlet.DispatcherServlet
    </servlet-class>
<!--    服务器启动的时候，让DispatcherServlet对象创建-->
    <load-on-startup>1</load-on-startup>
  </servlet>

  <!--  如果没有定义配置文件名字，spring直接会找web-inf下的servlet-name-servler.xml文件-->
  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <filter>
    <filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

在WEB-INF/建立springmvc的配置文件：

springmvc-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
            http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/mvc/spring-aop.xsd
">
<!--    配置注解扫描-->
    <context:component-scan base-package="com.quan">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

<!--    配置试图解析器-->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

<!--    设置静态资源不过滤-->
    <mvc:resources mapping="/css/**" location="WEB-INF/css"/>
    <mvc:resources mapping="/images/**" location="WEB-INF/images"/>
    <mvc:resources mapping="/js/**" location="WEB-INF/js"/>

<!--    开启springMVC注解支持-->
    <mvc:annotation-driven/>
</beans>

编写controller：

@Controller
@RequestMapping("/account")
public class AccountController {
    @Autowired
    private AccountService accountService;

    @RequestMapping("/findAll")
    public ModelAndView accFindAll(){
        ModelAndView mv = new ModelAndView();
        System.out.println("springmvcdone1");
        Account account = accountService.findAll();
        mv.addObject("at",account);
        mv.addObject("atmoney",account.getMoney());
        mv.setViewName("list");
        System.out.println("springmvcdone2");
        return mv;
    }
}

list.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false"%>
<html>
<head>
    <title>findAll</title>
</head>
<body>
${requestScope.atmoney}
${requestScope.at.toString()}
</body>
</html>

这里可以不用编写页面，直接命令行输入消息验证生效就行

由于Tomcat服务器会自动通过web.xml配置文件进行springmvc配置文件的加载，

并没有applicationContext.xml的加载（也就是spring并没有被加载），所以可以通过监听ServeltContext域对象，在创建时加载spring的配置文件

在web.xml文件加入监听器：

<!--  配置spring的监听器-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
<!--  配置加载的类路径-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring-config.xml</param-value>
  </context-param>

这样子我们就可以使用依赖注入

配置Mybaties：

可以在spring配置文件里面直接在上mybatis的配置

<!--配置链接对象-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="url" value="jdbc:mysql://129.204.3.133/mybatis" />
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="username" value="root"/>
        <property name="password" value="2004"/>
    </bean>

<!--    配置SQLsession工厂-->

 <bean id="factoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
     <property name="dataSource" ref="dataSource"/>
<!--     <property name="mapperLocations" value="com.quan.dao/*.xml"/>-->
 </bean>

<!--    配置邵渺的dao-->
    <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.quan.dao"/>
    </bean>

编写AccountDao的maping文件：

<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.quan.dao.AccountDao">
    <select id="findAll" resultType="com.quan.model.Account">
        select * from account where id = 1;
    </select>
</mapper>

测试结果：