* 新建maven工程,web-app骨架
* 添加依赖
mybatis 核心包和依赖包
spring和mybatis整合包
数据库驱动jar
数据库连接池的包
日志相关的jar
spring相关的jar包
jstl 包
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.18.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.8.9</version>
</dependency>
<dependency>
<groupId>aopalliance</groupId>
<artifactId>aopalliance</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.37</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
<!--slf4j-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
<!--log4j-->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!--slf4j到log4j-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.5</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
* copy之前工程的代码
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring.xml")
public class SpringTest {
@Autowired
@Qualifier("classService")
private ClassesService mClassesService;
@Autowired
@Qualifier("transferService")
private TransferService mTransferService;
@Test
public void test1(){
BaseDataVo dataVo = mClassesService.getClassesFromName("html");
Gson gson=new Gson();
System.out.println(gson.toJson(dataVo));
}
@Test
public void test2(){
TransferDataVo transferDataVo=new TransferDataVo();
transferDataVo.setSid(100001);
transferDataVo.setOldCno(1001);
transferDataVo.setNewCno(1002);
BaseDataVo transferData = mTransferService.transfer(transferDataVo);
Gson gson=new Gson();
System.out.println(gson.toJson(transferData));
}
}
* 由于Spring内置aop事务处理不能满足我们自定义切面的要求,导致配置的事务失效了,不能回滚
* 解决方案:自己开启事务,自己回滚
@Component
@Aspect
public class DataVoAndTransactionAspect {
@Autowired
private PlatformTransactionManager transactionManager;
@Pointcut("execution(* com.hx.ssm.service.impl.*ServiceImpl.*(..))")
public void pointCut() {
}
@Around("pointCut()")
public Object around(ProceedingJoinPoint joinPoint) {
Object obj = null;
BaseDataVo baseDataVo = null;
DefaultTransactionDefinition definition=new DefaultTransactionDefinition();
// 一般查询语句(get,query,find开头):设置为只读,事务的传播性设置我supports(A中没有事务,就以非事务形式执行)
String methodName=joinPoint.getSignature().getName();
if(methodName.startsWith("get")||methodName.startsWith("query")||methodName.startsWith("find")){
definition.setReadOnly(true);
definition.setPropagationBehavior(DefaultTransactionDefinition.PROPAGATION_SUPPORTS);
}
TransactionStatus status = transactionManager.getTransaction(definition);
try {
obj = joinPoint.proceed();
if (obj instanceof BaseDataVo) {
baseDataVo = (BaseDataVo) obj;
baseDataVo.setCode(DataVoStatus.SUCEESS_CODE);
baseDataVo.setResult(DataVoStatus.SUCEESS_RESULT);
}
transactionManager.commit(status);
} catch (Throwable throwable) {
throwable.printStackTrace();
baseDataVo=new BaseDataVo();
baseDataVo.setCode(DataVoStatus.FAIL_CODE);
baseDataVo.setResult(DataVoStatus.FAIL_RESULT);
transactionManager.rollback(status);
return baseDataVo;
}
return obj;
}
@AfterReturning("pointCut()")
public void speakAfterReturning() {
System.out.println("speakAfeterReturning");
}
@AfterThrowing("pointCut()")
public void speakAfterThrowing() {
System.out.println("speakAfterThrowing");
}
}
* 优化自定义切面类的代码
* 配置事务定义到Spring容器中
<bean class="org.springframework.transaction.support.DefaultTransactionDefinition">
</bean>
在切面中使用它
* 配置多个properties文件
Spring容器采用反射扫描的发现机制,在探测到Spring容器中有一个 org.springframework.beans.config.PropertyPlaceholderConfigurer的Bean就会停止对剩余PropertyPlaceholderConfigurer的扫描,
换句话说,即Spring容器仅允许最多定义一个PropertyPlaceholderConfigurer 或 <content:property-placeholder>其余的会被Spring忽略
filterName=get,query,find
<bean id="configProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="fileEncoding" value="UTF-8"/>
<property name="locations">
<list>
<value>classpath:dbconfig.properties</value>
<value>classpath:trans.properties</value>
</list>
</property>
</bean>
<bean class="org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer">
<property name="properties" ref="configProperties"></property>
</bean>
* 切面类
@Component
@Aspect
public class DataVoAndTransactionAspect {
@Autowired
private PlatformTransactionManager transactionManager;
@Autowired
private DefaultTransactionDefinition definition;
@Value("#{configProperties.filterName.split(',')}")
private String[] filterNames;
@Pointcut("execution(* com.hx.ssm.service.impl.*ServiceImpl.*(..))")
public void pointCut() {
}
@Around("pointCut()")
public Object around(ProceedingJoinPoint joinPoint) {
Object obj = null;
BaseDataVo baseDataVo = null;
// DefaultTransactionDefinition definition=new DefaultTransactionDefinition();
// 一般查询语句(get,query,find开头):设置为只读,事务的传播性设置我supports(A中没有事务,就以非事务形式执行)
setReadOnlyAndPropagationBehavior(joinPoint);
TransactionStatus status = transactionManager.getTransaction(definition);
try {
obj = joinPoint.proceed();
if (obj instanceof BaseDataVo) {
baseDataVo = (BaseDataVo) obj;
baseDataVo.setCode(DataVoStatus.SUCEESS_CODE);
baseDataVo.setResult(DataVoStatus.SUCEESS_RESULT);
}
transactionManager.commit(status);
} catch (Throwable throwable) {
throwable.printStackTrace();
baseDataVo = new BaseDataVo();
baseDataVo.setCode(DataVoStatus.FAIL_CODE);
baseDataVo.setResult(DataVoStatus.FAIL_RESULT);
transactionManager.rollback(status);
return baseDataVo;
}
return obj;
}
/**
* 一般查询语句(get,query,find开头):设置为只读,
* 事务的传播性设置我supports(A中没有事务,就以非事务形式执行)
* @param joinPoint
*/
private void setReadOnlyAndPropagationBehavior(ProceedingJoinPoint joinPoint) {
// 一般查询语句(get,query,find开头):设置为只读,事务的传播性设置我supports(A中没有事务,就以非事务形式执行)
String methodName = joinPoint.getSignature().getName();
boolean macth=false;
for(String filterName:filterNames){
if(methodName.startsWith(filterName)){
macth=true;
break;
}
}
if (macth) {
definition.setReadOnly(true);
definition.setPropagationBehavior(DefaultTransactionDefinition.PROPAGATION_SUPPORTS);
System.out.println("setReadOnly:true,PROPAGATION:supports");
}
}
}
* 配置事务管理xml配置(参考:假如Spring满足我们的要求,一般可以这样怎么配置)
* 参考一
<!-- 通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<!-- 传播行为 -->
<tx:method name="save*" propagation="REQUIRED"/>
<tx:method name="insert*" propagation="REQUIRED"/>
<tx:method name="delete*" propagation="REQUIRED"/>
<tx:method name="update*" propagation="REQUIRED"/>
<tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
<tx:method name="get*" propagation="SUPPORTS" read-only="true"/>
</tx:attributes>
</tx:advice>
<!-- 切面 -->
<aop:config>
<aop:advisor advice-ref="txAdvice"
pointcut="execution(* com.hx.ssm.service.impl.*ServiceImpl.*(..)))"/>
</aop:config>
* 参考二
<!-- 定义事务策略 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<!--定义查询方法都是只读的 -->
<tx:method name="query*" read-only="true" />
<tx:method name="find*" read-only="true" />
<tx:method name="get*" read-only="true" />
<!-- 主库执行操作,事务传播行为定义为默认行为,如果增删改时不需要事务,请用nt开头,例如:ntUpdateXXX -->
<tx:method name="save*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="update*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="delete*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="insert*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="add*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="submit**" propagation="REQUIRED" rollback-for="Exception" />
<!--其他方法使用默认事务策略 -->
<tx:method name="*" />
</tx:attributes>
</tx:advice>
<aop:config>
<!--pointcut元素定义一个切入点,execution中的第一个星号 用以匹配方法的返回类型,
这里星号表明匹配所有返回类型。 com.abc.dao.*.*(..)表明匹配cn.it.mybatis.service包下的所有类的所有
方法 -->
<aop:pointcut id="myPointcut" expression="execution(* com.test.manager.service.*.*(..))" />
<!--将定义好的事务处理策略应用到上述的切入点 -->
<aop:advisor advice-ref="txAdvice" pointcut-ref="myPointcut" />
</aop:config>
* Spring父子容器
Spring是父容器,SpringMVC是其子容器,并且在Spring父容器中注册的Bean对于SpringMVC容器中是可见的,而在SpringMVC容器中注册的Bean对于Spring父容器中是不可见的,也就是子容器可以看见父容器中的注册的Bean,反之就不行
建议:
1 Spring容器:装载除了controller包的其他bean
2 SpringMVC容器:装载controller包的bean
* spring.xml
<context:component-scan base-package="com.hx.ssm">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
* springmvc.xml
<context:component-scan base-package="com.hx.ssm" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:include-filter>
</context:component-scan>
* spring.xml 配置文件
<?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
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<import resource="classpath:spring-mybatis.xml"></import>
<context:component-scan base-package="com.hx.ssm">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
// Spring 动态织入
// proxy-target-class:false:假如代理子类有接口,用的JDK的动态代理,
// 假如没有接口,用子类代理(Cglib...)
<aop:aspectj-autoproxy proxy-target-class="false"/>
</beans>
* springmvc.xml
<?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:mvc="http://www.springframework.org/schema/mvc"
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-4.0.xsd
">
<context:component-scan base-package="com.hx.ssm" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:include-filter>
</context:component-scan>
<mvc:annotation-driven/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/WEB-INF/jsps/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
* web.xml 的配置
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>SSM</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<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.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
* 另一种配置方法
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/applicationContext-*.xml</param-value></context-param>
假如这样配的话,spring.xml就不用使用import导入了(取名字规范)
* HelloController
@Controller
public class HelloController {
@RequestMapping("/hello.do")
public ModelAndView hello(){
ModelAndView modelAndView=new ModelAndView();
modelAndView.addObject("name","xiaohei");
modelAndView.setViewName("hello");
return modelAndView;
}
}