搭建SSM框架
1.1. 创建Maven Web项目
v 建Maven Web项目
v 生成项目的web.xml配置文件
2.1. 整合Spring MVC
v 添加Spring MVC依赖
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.9.RELEASE</version>
</dependency>
v 配置Spring MVC核心控制器
<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:spring-*.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
v 添加spring-mvc配置文件
<beans default-lazy-init="true"
xmlns="http://www.springframework.org/schema/beans"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd" >
</beans>
Spring mvc 配置
<!-- 自动扫描该包 -->
<context:component-scan base-package="cn.com" />
<!-- springMVC数据转化与格式化 -->
<mvc:annotation-driven conversion-service="conversionService" />
<bean id="conversionService"
class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
</bean>
<!-- 对静态资源的访问由HandlerMapping转到DefaultServletHttpRequestHandler处理并返回 -->
<mvc:default-servlet-handler />
<!-- 定义跳转的文件的前后缀 ，视图模式配置 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址 -->
<property name="prefix" value="/WEB-INF/pages/" />
<property name="suffix" value=".jsp"></property>
</bean>
v 测试
编写分销商控制器，验证MVC环境
@Controller
@RequestMapping("/distributor")
public class DistributorController {
@RequestMapping("/listUI")
public String listUI(){
System.out.println("listUI()");
return "distributor/distributor_list";
}
}
2.3. 整合DRUID连接池对象
v 添加DRUID依赖
添加mysql驱动依赖（不要选5.1.6版本）
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.40</version>
</dependency>
添加druid依赖
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.23</version>
</dependency>
v 添加jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///test?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&useSSL=true
jdbc.username=root
jdbc.password=root
jdbc.initialSize=5
jdbc.maxActive=50
jdbc.minIdle=0
jdbc.maxWait=60000
jdbc.druid.filters=
jdbc.timeBetweenLogStatsMillis=60000
v 添加spring-pool.xml 配置DRUID
加载properties文件
<!--加载 config 配置文件 -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:jdbc.properties</value>
</list>
</property>
</bean>
配置DRUID的过滤监控功能
<bean id="stat-filter" class="com.alibaba.druid.filter.stat.StatFilter" lazy-init="true">
<description>状态过滤器</description>
<!-- 通过slowSqlMillis用来配置SQL慢的标准 -->
<property name="slowSqlMillis" value="3000" />
<!-- 以日志形式输出执行效率慢的SQL -->
<property name="logSlowSql" value="true" />
<!-- 通过mergeSql属性，合并SQL -->
<property name="mergeSql" value="true" />
</bean>
配置DRUID数据源
<!--配置DruidDataSource连接池 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
destroy-method="close" init-method="init" lazy-init="true">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="${jdbc.initialSize}" />
<!-- 连接池最大数量 -->
<property name="maxActive" value="${jdbc.maxActive}" />
<!-- 连接池最小空闲 -->
<property name="minIdle" value="${jdbc.minIdle}" />
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="${jdbc.maxWait}" />
<!--配置了maxWait之后，缺省启用公平锁，并发效率会有所下降，如果需要可以通过配置useUnfairLock属性为true使用非公平锁。 -->
<property name="useUnfairLock" value="true" />
<property name="defaultReadOnly" value="false" />
<!-- 通过配置StatFilter,打开监控台统计功能 -->
<property name="proxyFilters">
<list>
<ref bean="stat-filter" />
</list>
</property>
<property name="filters" value="${jdbc.druid.filters}" />
<!--<property name="connectionProperties" value="password=${username}"/>-->
<property name="testWhileIdle" value="true" />
<property name="testOnBorrow" value="false" />
<property name="testOnReturn" value="false" />
<property name="validationQuery" value="SELECT 1 from DUAL" />
<property name="timeBetweenLogStatsMillis" value="${jdbc.timeBetweenLogStatsMillis}" />
</bean>
v Web.xml中配置监控功能（了解，先不用配置）
<servlet>
<servlet-name>DruidStatView</servlet-name>
<servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
<init-param>
<param-name>exclusions</param-name>
<param-value>*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*</param-value>
</init-param>
<init-param>
<param-name>resetEnable</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>loginUsername</param-name>
<param-value>druid</param-value>
</init-param>
<init-param>
<param-name>loginPassword</param-name>
<param-value>druid</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>DruidStatView</servlet-name>
<url-pattern>/druid/*</url-pattern>
</servlet-mapping>
根据配置中的url-pattern来访问内置监控页面，如果是上面的配置，内置监控页面的首页是/druid/index.html，
例如http://localhost:8080/tpms-distributor-01/druid/login.html
v 编写连接池单元测试
添加Junit依赖
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
编写测试类
@Test
public void testPool() {
ApplicationContext ctx=
new ClassPathXmlApplicationContext("spring-pool.xml");
DruidDataSource dataSource=(DruidDataSource)ctx.getBean("dataSource");
System.out.println(dataSource);
Assert.assertNotEquals(dataSource, null);
}
2.4. 整合MyBatis框架
v 添加MyBatis依赖
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.8</version>
</dependency>
在比较新的版本中通常还需要如下两个依赖
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.9.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.9.RELEASE</version>
</dependency>
v 添加spring-mybatis 配置文件，并添加如下内容
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" >
<list><value>classpath:mapper/*.xml</value></list>
</property>
</bean>
<!-- Mapper接口所在包，Spring会自动查找其下的Mapper -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="cn.tedu.**.dao "/>
</bean>
v 编写单元测试
@Test
public void testSessionFactory() {
ApplicationContext ctx=
new ClassPathXmlApplicationContext("spring-mvc.xml","spring-pool.xml","spring-mybatis.xml");
Object sessionFactory=ctx.getBean("sqlSessionFactory");
System.out.println(sessionFactory);
Assert.assertNotEquals(sessionFactory, null);
}
1.1. 整合Log4J输出
目的是实现mybati SQL日志的输出便于调试跟踪（扩展实现）
v 添加log4J依赖：
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.7</version>
</dependency>
v 添加配置文件（log4j2.xml）：了解不需要掌握
<?xml version="1.0" encoding="UTF-8"?>
<configuration status="off">
<appenders>
<!--这个输出控制台的配置-->
<Console name="Console" target="SYSTEM_OUT">
<!-- <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
<PatternLayout pattern="%d{dd MMM yyyy HH\:mm\:ss.SSS} [%p] [%t] [%c] %m%n" /> -->
<!-- %p 输出优先级； %t 输出产生该日志事件的线程名；%c 输出所属的类目，通常就是所在类的全名；%m 输出代码中 指定的消息；%n 输出一个回车换行符，Windows平台为“/r/n”，Unix平台为“/n”。 -->
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
</Console>
<!--这个会打印出所有的信息，每次大小超过size，则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩，作为存档-->
<RollingFile name="RollingFile" fileName="logs/TraceLog.log"
filePattern="logs/$${date:yyyy-MM}/log-%d{MM-dd-yyyy}-%i.log.gz">
<PatternLayout pattern="%d{dd MMM yyyy HH\:mm\:ss.SSS} [%p] [%t] [%c] %m%n"/>
<SizeBasedTriggeringPolicy size="50MB"/>
</RollingFile>
</appenders>
<loggers>
<root level="debug">
<appender-ref ref="Console" />
<!-- <appender-ref ref="RollingFile"/> --><!-- 写入到文件 -->
</root>
</loggers>
</configuration>
v 添加配置文件（mybatis-config.xml）
<?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>
<settings>
<!-- mybatis控制台LOG输出 -->
<setting name="logImpl" value="LOG4J2" />
</settings>
</configuration>
v 修改配置文件spring-mybatis.xml添加mybatis-config.xml的配置
…
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations">
<list>
<value>classpath:mapper/*.xml</value>
</list>
</property>
</bean>
…
2.6. 整合JSON对象转换
v 添加Jackson依赖
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.5</version>
</dependency>
v 在需要返回JSON对象的方法上使用@ResponseBody注解,例如
@RequestMapping("/findObjects")
@ResponseBody
public JsonResult doFindObjects(Project entity,PageObject pageObject){
Map<String,Object> map=projectService.findObjects(entity, pageObject);
return new JsonResult(map);
}
