spring使用笔记

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/yaonga/article/details/82849461

spring使用：

• 导入spring包，mybatis包，tomcat插件等

<project xmlns="http://maven.apache.org/POM/4.0.0" 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.yalong</groupId>
  <artifactId>springTest</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  
  <dependencies>
		<!-- 持久层依赖 开始 -->
		<!-- spring ioc组件需要的依赖包 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>5.0.7.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>5.0.7.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>5.0.7.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-expression</artifactId>
			<version>5.0.7.RELEASE</version>
		</dependency>

		<!-- spring 事务管理和JDBC依赖包 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>5.0.7.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>5.0.7.RELEASE</version>
		</dependency>

		<!-- mysql数据库驱动包 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.35</version>
		</dependency>

		<!-- dbcp连接池的依赖包 -->
		<dependency>
			<groupId>commons-dbcp</groupId>
			<artifactId>commons-dbcp</artifactId>
			<version>1.4</version>
		</dependency>

		<!-- mybatis依赖 -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.4.5</version>
		</dependency>

		<!-- mybatis和spring的整合依赖 -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>1.3.1</version>
		</dependency>

		<!-- 持久层依赖 结束 -->

		<!-- 业务层依赖 开始 -->
		<!-- 基于AspectJ的aop依赖 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
			<version>5.0.7.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>aopalliance</groupId>
			<artifactId>aopalliance</artifactId>
			<version>1.0</version>
		</dependency>
		<!-- 业务层依赖 结束 -->


		<!-- 表现层依赖 开始 -->
		<!-- spring MVC依赖包 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>5.0.7.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>5.0.7.RELEASE</version>
		</dependency>

		<!-- jstl 取决于视图对象是否是JSP -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>

		<!-- servlet -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.1.0</version>
			<scope>provided</scope>
		</dependency>


		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context-support</artifactId>
			<version>5.0.7.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-oxm</artifactId>
			<version>5.0.7.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>com.thoughtworks.xstream</groupId>
			<artifactId>xstream</artifactId>
			<version>1.4.10</version>
		</dependency>

		<!-- jackson依赖 -->
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.9.6</version>
		</dependency>


		<!-- 表现层依赖 结束 -->

		<!-- spring 单元测试组件包 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>5.0.7.RELEASE</version>
		</dependency>

		<!-- 单元测试Junit -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
		</dependency>

		<!-- Mock测试使用的json-path依赖 -->
		<dependency>
			<groupId>com.jayway.jsonpath</groupId>
			<artifactId>json-path</artifactId>
			<version>2.2.0</version>
		</dependency>


		<!-- 文件上传 -->
		<dependency>
			<groupId>commons-fileupload</groupId>
			<artifactId>commons-fileupload</artifactId>
			<version>1.3.1</version>
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<!-- 配置Maven的JDK编译级别 -->
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.2</version>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
					<encoding>UTF-8</encoding>
				</configuration>
			</plugin>

			<!-- tomcat7插件 -->
			<!-- 注意：目前来说，maven中央仓库还没有tomcat8的插件 -->
			<plugin>
				<groupId>org.apache.tomcat.maven</groupId>
				<artifactId>tomcat7-maven-plugin</artifactId>
				<version>2.2</version>
				
				<configuration>
					<port>8080</port>
				</configuration>
			</plugin>
		</plugins>
	</build>
  
</project>

* xml声明bean，spring加载解析xml，实例化bean并依赖注入属性，添加aop事务处理：
        * xml文件：

<?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:aop="http://www.springframework.org/schema/aop"
	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">

	<!-- 读取java配置文件 -->
	<!-- 作用1：加载properties文件，存储到Properties对象 -->
	<!-- 作用2：去将spring中的有占位符的bean，进行替换 -->
	<context:property-placeholder location="classpath:db.properties"/>

	<!-- Spring IoC基于XML配置，主要是通过bean标签进行Bean的管理的 -->
	<!-- 配置数据源连接池(dbcp) -->
	<bean id="dataSource"
		class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
		<!-- 注意事项：property标签name属性，和set方法名对应，不是和属性对应 -->
		<!-- ${}：这是spring中的占位符property-placehodler -->
		<property name="driverClassName" value="${db.driver}" />
		<property name="url" value="${db.url}" />
		<property name="username" value="${db.username}" />
		<property name="password" value="${db.password}" />
	</bean>
	<!-- spring提供的JDBC模板 -->
	<bean id="jdbcTemplate"
		class="org.springframework.jdbc.core.JdbcTemplate">
		<property name="dataSource" ref="dataSource"></property>
	</bean>
	
	<bean id="userDao" class="com.yalong.dao.XMLUserDaoImpl">
		<property name="template" ref="jdbcTemplate"></property>
	</bean>
	
	<bean id="userService"
		class="com.yalong.service.XMLUserServiceImpl">
		<property name="dao" ref="userDao"></property>
	</bean>

</beans>

* 实例化BeanFactory实现类：
      ApplicationContext context = new ClassPathXmlApplicationContext("classpath:project/spring-xml.xml");
      * 通过BeanFactory的getBean获取Bean实例：
            UserService service = context.getBean(UserService.class);