1、项目目录
2、jar包
- dbcp:连接池
- pool:连接池
- logging:日志
- log4j:日志
- mybatis-spring:用于SqlSession等相关操作
- spring相关包
- mybatis
3、web.xml配置
- 可以删除本配置文件,本次测试用的是JUnit,不涉及网络访问,所有该配置文件并不需要
<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>transactionDome</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mybatis.xml</param-value>
</context-param>
<servlet>
<servlet-name>springServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value></param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
4、spring-mybatis.xml配置
- 注释已经够详细,不再详细说明
<?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:p="http://www.springframework.org/schema/p"
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-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- 自动扫描 -->
<context:component-scan base-package="com.sysker.spring.dome" />
<!-- 引入配置文件 -->
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties" />
</bean>
<!-- 连接池配置 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="${initialSize}"></property>
<!-- 连接池最大数量 -->
<property name="maxActive" value="${maxActive}"></property>
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="${maxIdle}"></property>
<!-- 连接池最小空闲 -->
<property name="minIdle" value="${minIdle}"></property>
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="${maxWait}"></property>
</bean>
<!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:com/sysker/spring/dome/mapping/*.xml"></property>
</bean>
<!-- DAO接口所在包名,Spring会自动查找其下的类 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.sysker.spring.dome.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
<!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 配置事务管理模板:Spring为了简化事务管理的代码而提供的类 -->
<bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
<property name="transactionManager" ref="transactionManager"></property>
</bean>
</beans>
5、jdbc.properties配置
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/spring?characterEncoding=UTF-8&useSSL=false
username=root
password=root
initialSize=0
maxActive=20
maxIdle=20
minIdle=1
maxWait=60000
6、log4j配置(日志)
#定义LOG输出级别
log4j.rootLogger=INFO,Console,File
#定义日志输出目的地为控制台
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
#可以灵活地指定日志输出格式,下面一行是指定具体的格式
log4j.appender.Console.layout = org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n
#文件大小到达指定尺寸的时候产生一个新的文件
log4j.appender.File = org.apache.log4j.RollingFileAppender
#指定输出目录
log4j.appender.File.File = logs/ssm.log
#定义文件最大大小
log4j.appender.File.MaxFileSize = 10MB
# 输出所以日志,如果换成DEBUG表示输出DEBUG以上级别日志
log4j.appender.File.Threshold = ALL
log4j.appender.File.layout = org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n
7、entity及mapping.xml
package com.sysker.spring.dome.entity;
public class Account {
// 账户id
private String id;
// 账号名
private String name;
// 余额
private String money;
public Account() {
super();
}
public Account(String id, String name, String money) {
super();
this.id = id;
this.name = name;
this.money = money;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getMoney() {
return money;
}
public void setMoney(String money) {
this.money = money;
}
}
- 由于直接mapping中直接用的是穿进来的参数,所以实体类也没有用到
<?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" >
<mapper namespace="com.sysker.spring.dome.dao.AccountDao">
<update id="inMoney">
update account set
money = money + #{arg1}
where name = #{arg0}
</update>
<update id="outMoney">
update account set
money = money - #{arg1}
where name = #{arg0}
</update>
</mapper>
8、Dao
package com.sysker.spring.dome.dao;
public interface AccountDao {
void outMoney(String out, String money);
void inMoney(String in, String money);
}
9、service及serviceImpl
package com.sysker.spring.dome.service;
public interface AccountService {
void transfer(String out, String in, String money);
}
service实现,包含了事务管理
package com.sysker.spring.dome.service.impl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallbackWithoutResult;
import org.springframework.transaction.support.TransactionTemplate;
import com.sysker.spring.dome.dao.AccountDao;
import com.sysker.spring.dome.service.AccountService;
@Service
public class AccountServiceImpl implements AccountService {
@Autowired
private AccountDao accountDao;
@Autowired
private TransactionTemplate transactionTemplate;
@Override
public void transfer(String out, String in, String money) {
/**
* 事务管理,execute()方法中创建了一个匿名内部类,在匿名内部类中操作业务,即可实现事务管理
*/
transactionTemplate.execute(new TransactionCallbackWithoutResult() {
@Override
protected void doInTransactionWithoutResult(TransactionStatus transactionStatus) {
accountDao.outMoney(out, money);
int i = 1/0;
accountDao.inMoney(in, money);
}
});
}
}
10、测试类
package com.sysker.spring.dome.test;
import javax.annotation.Resource;
import org.apache.log4j.Logger;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.sysker.spring.dome.service.AccountService;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:spring-mybatis.xml"})
public class TestMybatis {
private static Logger logger = Logger.getLogger(TestMybatis.class);
@Resource
private AccountService accountService = null;
@Test
public void test1() {
accountService.transfer("aaa", "bbb", "200");
logger.info("success");
}
}
总结
- 今天在慕课网学习,本来是打算实现事务管理的,但发现视频中老师采用的是jdbc连接,所以就参考老师的思路,实现了mybatis-spring整合,过程虽然艰难,但确实收获满满:
-
- 1、对依赖注入有了更深的理解和认知,对spring有了更全面的认知,当然更多的还是发现自己了解的太浅;
-
- 2、多练习,多尝试,多思考,多琢磨,多总结,当你踩完所有的坑,你就离成神之路不远了
-
- 3、我始终比较喜欢在bug中学习,每填掉一个坑都让人感到兴奋,同时也会收获很多
原文地址:https://www.cnblogs.com/caoleiCoding/p/9278757.html
时间: 2024-10-05 16:22:43