SSM中配置文件的头部信息

最新推荐文章于 2020-07-08 20:30:10 发布

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最新推荐文章于 2020-07-08 20:30:10 发布

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本文链接：https://blog.youkuaiyun.com/qq_41312731/article/details/94636352

本文介绍了SSM框架中Mybatis、Spring和Spring MVC的配置文件头部信息，包括Mybatis的mybatis-config.xml和mapper.xml，Spring的ApplicationContext.xml，以及Spring MVC的Springmvc-servlet.xml和web.xml配置。详细阐述了Mybatis的开发步骤以及各配置文件在SSM整合中的作用。

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Mybatis

Mybatis下载地址：https://github.com/mybatis

核心配置文件mybatis-config.xml或configuration.xml的头部信息

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">

Dao层-SQL映射文件(mapper.xml)的头部信息

<?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">

使用MyBatis的开发步骤

下载mybatis-3.2.2.jar包并导入工程
编写MyBatis核心配置文件(configuration.xml)
创建实体类-POJO
DAO层-SQL映射文件(mapper.xml)
创建测试类
读取核心配置文件mybatis-config.xml
创建SqlSessionFactory对象，读取配置文件
创建SqlSession对象
调用mapper文件进行数据操作

Spring

ApplicationContext.xml配置文件的头部信息

spring下载地址：repo.spring.io

<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:tx="http://www.springframework.org/schema/tx"
    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/aop
	http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
	http://www.springframework.org/schema/tx
	http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context-3.2.xsd">

Spring MVC

Springmvc-servlet.xml的头部信息

<?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:mvc="http://www.springframework.org/schema/mvc"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        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.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

web.xml配置信息

<?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" 
		 xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
		 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">

  <display-name>springMVC</display-name>
  <welcome-file-list>
    <welcome-file>/WEB-INF/jsp/login.jsp</welcome-file>
  </welcome-file-list>
  
  
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:ApplicationContext.xml</param-value>
  </context-param>
 
  <!-- 过滤器 -->
  <filter>
    <filter-name>encodingFilter</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>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
 
  <!-- 配置前端控制器 -->
  <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:Springmvc-servlet.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  
  
  <context-param>
    <param-name>log4jConfigLocation</param-name>
    <param-value>classpath:log4j.properties</param-value>
  </context-param>
  
  <!-- 权限 -->
  <context-param>
    <param-name>webAppRootKey</param-name>
    <param-value>ssm_demo.root</param-value>
  </context-param>
  
  <!-- 监听器 -->
  <listener>
    <listener-class>
			org.springframework.web.util.Log4jConfigListener
	</listener-class>
  </listener>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
</web-app>