spring4 学习4 spring MVC+mybatis+Mysql

在前面搭建的基础上，引入新的jar包如下：

aopalliance-1.0.jar
aspectjweaver-1.8.8.jar
mybatis-3.3.0.jar
mybatis-spring-1.2.3.jar
mysql-connector-java-5.1.31.jar
spring-aop-4.2.4.RELEASE.jar
spring-aspects-4.2.4.RELEASE.jar
spring-jdbc-4.2.4.RELEASE.jar
spring-orm-4.2.4.RELEASE.jar
spring-oxm-4.2.4.RELEASE.jar
spring-tx-4.2.4.RELEASE.jar

代码结构如下：

localConfig.properties

#datasource properties
jdbc.url=jdbc:mysql://localhost:3306/world
jdbc.username=root
jdbc.password=root

spring-dataSource.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:tx="http://www.springframework.org/schema/tx"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
	http://www.springframework.org/schema/aop 
	http://www.springframework.org/schema/aop/spring-aop-4.1.xsd  
	http://www.springframework.org/schema/tx 
	http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
    </bean>

	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource" />
	</bean>
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<tx:method name="*" />
		</tx:attributes>
	</tx:advice>
	<aop:config>
		<aop:pointcut expression="execution(* com.xx.demo.bsh.*.*.*(..))"
			id="myPointcut" />
		<aop:advisor advice-ref="txAdvice" pointcut-ref="myPointcut" />
	</aop:config>
</beans>

           配置玩事务后先检查一下mysql中的表的存储引擎是否是innoDB。若是MyISAM，要改成InnoDB,因为MyISAM是事务不安全的。

          查看命令:show create table city;

          修改命令:alter table city engine = InnoDB;

spring-applicationContext.xml

<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-4.1.xsd
			 http://www.springframework.org/schema/context
             http://www.springframework.org/schema/context/spring-context-4.1.xsd">
	<context:annotation-config />
	<context:component-scan base-package="com.xx.demo.dao"/>
	<context:component-scan base-package="com.xx.demo.bsh" />
    <context:property-placeholder location="classpath:config/env/localConfig.properties" />  
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  
        <property name="basePackage" value="com.xx.demo.dao" />  
    </bean> 
	<import resource="classpath:config/spring-dataSource.xml"/>
</beans>

 ICityDao.java

package com.xx.demo.dao.test;

import java.util.List;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import com.xx.demo.entity.test.CityEO;

@Repository("cityDao") 
public interface ICityDao {
	
	@Select(value = "select count(1) as count from city") 
	public long countAll();

	@Delete(value="delete from city where id=#{id}")
	public void deleteCityById(long id);
	
	@Select(value="select * from city")
	public List<CityEO> getAllCitys();
	
}

CityEO.java

   EO类属性有数据库列名一致

public class CityEO {
	private int id;
	private String name;
	private String countryCode;
	private String district;
	private long population;
...
}

  TestService.java

package com.xx.demo.bsh.test;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.xx.demo.dao.test.ICityDao;
import com.xx.demo.entity.test.CityEO;

@Service("testService")
public class TestService {
	
	@Resource
	private ICityDao cityDao;
	
	public void print(){
		System.out.println("这是服务层方法");
	}
	
	public long getCityCount(){
		return cityDao.countAll();
	}

	public long deleteCityById(long id) {
		cityDao.deleteCityById(id);
		return id;
	}
	
	public List<CityEO> getAllCitys(){
		return cityDao.getAllCitys();
	}
}

 TestController.java

package com.xx.demo.web.test;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.xx.demo.bsh.test.TestService;
import com.xx.demo.entity.test.CityEO;

@Controller
public class TestController {
	@Resource
	private TestService testService;
	
	@RequestMapping("/firstPage")
	public String testMethod(ModelMap model){
		testService.print();
		model.put("msg", "velocity 测试");
		return "test";
	}
	
	@RequestMapping("/getCityCount")
	@ResponseBody
	public String getCityCount(){
		Map<String,Object> result = new HashMap<String,Object>();
		long count = testService.getCityCount();
		return String.valueOf(count);
	}
	
	@RequestMapping("/deleteCityById")
	@ResponseBody
	public String deleteCityById(HttpServletRequest request){
		long id = Long.valueOf(request.getParameter("id"));
		long result = testService.deleteCityById(id);
		return "delete--OK--"+result;
	}
	
	@RequestMapping("/getAllCitys")
	public String getAllCitys(HttpServletRequest request,ModelMap model){
		List<CityEO> citys = testService.getAllCitys();
		model.put("citys", citys);
		return "showCitys";
	}
}

运行结果：

只贴 了 getAllCitys