2017-3-28 笔记 知识点回顾

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Imooc SSM

第一步项目依赖

<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion>
<groupId>com.imooc.study</groupId>
<artifactId>study.web</artifactId>
<packaging>war</packaging>
<version>1.0-BETA</version>
<name>study.web Maven Webapp</name>
<url>http://maven.apache.org</url>
<!--常量  版本号-->
<properties>
<spring.version>4.3.7.RELEASE</spring.version>
<junit.version>4.11</junit.version>
<slf4j.version>1.7.6</slf4j.version>
<logback.version>1.2.2</logback.version>
<spring.version>4.3.7.RELEASE</spring.version>
<servlet-api.version>4.0.0-b03</servlet-api.version>
<mybatis.version>3.4.2</mybatis.version>
<mysql.version>6.0.6</mysql.version>
</properties>
<!--依赖管理-->
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-framework-bom</artifactId>
<version>${spring.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<!--项目依赖-->
<dependencies>
<!-- ===================编码辅助 依赖================== -->
<!--单元测试-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<!--日志组合 slf4j + logback-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>${logback.version}</version>
</dependency>
<!--slf4j接口整合-->
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${logback.version}</version>
</dependency>

<!-- ===================数据库层 依赖================== -->
<!--数据库依赖  驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
<scope>runtime</scope>
</dependency>
<!--数据库连接池-->
<dependency>
<groupId>c3p0&l
4000
t;/groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<!-- ===================Mybatis 依赖================== -->
<!--mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!--mybatis spring 整合依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<!-- ===================Servlet web 依赖================ -->
<!--jsp标签-->
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<!--jstl标签-->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--Jackson-->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.7</version>
</dependency>
<!--Servlet api-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<!-- ===================Spring 依赖================== -->
<!--spring 核心-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<!--spring dao层依赖 jdbc 事务-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
</dependency>
<!--spring web层依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
</dependency>
<!--spring test依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
</dependency>
</dependencies>

</project>

第二步 mybits 配置文件

<?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">
<configuration>
<!--配置全局属性-->
<settings>
<!--使用jdbc的getGenerateKey获取数据库自增主键-->
<setting name="useGenerateKeys" value="true"/>
<!--使用列别名替换列名-->
<setting name="useColumnLabel" value="true"/>
<!--驼峰命名转换：create_time >>> createTime  下划线-->
<setting name="mapUnderscoreCamelCase" value="true"/>
</settings>

<!--映射具体的mapper sql.xml-->
<mappers>
<mapper resource="mapper/SeckillDao.xml"></mapper>
<mapper resource="mapper/SuccesskilledDao.xml"></mapper>
</mappers>

</configuration>

数据库连接 转移至jdbc.properties 键值对配置文件

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/imooc?serverTimezone=UTC&characterEncoding=utf-8
username=root
password=1234

利用spring bean特性 把数据库连接封装在一个bean里 实现代码简化 

<?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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!--配置整合mybatis-->
<!--数据库参数-->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!--数据库连接池-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!--配置连接池属性-->
<property name="driverClass" value="${driver}"/>
<property name="jdbcUrl" value="${url}"/>
<property name="user" value="${username}"/>
<property name="password" value="${password}"/>
</bean>
</beans>