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：下载地址

localConfig.properties

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

spring-dataSource.xml

1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4. xmlns:tx="http://www.springframework.org/schema/tx"
5. xmlns:aop="http://www.springframework.org/schema/aop"
6. xsi:schemaLocation="http://www.springframework.org/schema/beans
7. http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
8. http://www.springframework.org/schema/aop
9. http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
10. http://www.springframework.org/schema/tx
11. http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">
12. <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
13. <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
14. <property name="url" value="${jdbc.url}"></property>
15. <property name="username" value="${jdbc.username}"></property>
16. <property name="password" value="${jdbc.password}"></property>
17. </bean>
18. <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
19. <property name="dataSource" ref="dataSource" />
20. </bean>
21. <bean id="transactionManager"
22. class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
23. <property name="dataSource" ref="dataSource" />
24. </bean>
25. <tx:advice id="txAdvice" transaction-manager="transactionManager">
26. <tx:attributes>
27. <tx:method name="*" />
28. </tx:attributes>
29. </tx:advice>
30. <aop:config>
31. <aop:pointcut expression="execution(* com.xx.demo.bsh.*.*.*(..))"
32. id="myPointcut" />
33. <aop:advisor advice-ref="txAdvice" pointcut-ref="myPointcut" />
34. </aop:config>
35. </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

1. <beans xmlns="http://www.springframework.org/schema/beans"
2. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
3. xsi:schemaLocation="http://www.springframework.org/schema/beans
4. http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
5. http://www.springframework.org/schema/context
6. http://www.springframework.org/schema/context/spring-context-4.1.xsd">
7. <context:annotation-config />
8. <context:component-scan base-package="com.xx.demo.dao"/>
9. <context:component-scan base-package="com.xx.demo.bsh" />
10. <context:property-placeholder location="classpath:config/env/localConfig.properties" />
11. <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
12. <property name="basePackage" value="com.xx.demo.dao" />
13. </bean>
14. <import resource="classpath:config/spring-dataSource.xml"/>
15. </beans>

ICityDao.java

1. package com.xx.demo.dao.test;
2. import java.util.List;
3. import org.apache.ibatis.annotations.Delete;
4. import org.apache.ibatis.annotations.Select;
5. import org.springframework.stereotype.Repository;
6. import com.xx.demo.entity.test.CityEO;
7. @Repository("cityDao")
8. public interface ICityDao {
9. @Select(value = "select count(1) as count from city")
10. public long countAll();
11. @Delete(value="delete from city where id=#{id}")
12. public void deleteCityById(long id);
13. @Select(value="select * from city")
14. public List<CityEO> getAllCitys();
15. }

CityEO.java

EO类属性有数据库列名一致

1. public class CityEO {
2. private int id;
3. private String name;
4. private String countryCode;
5. private String district;
6. private long population;
7. ...
8. }

TestService.java

1. package com.xx.demo.bsh.test;
2. import java.util.List;
3. import javax.annotation.Resource;
4. import org.springframework.stereotype.Service;
5. import com.xx.demo.dao.test.ICityDao;
6. import com.xx.demo.entity.test.CityEO;
7. @Service("testService")
8. public class TestService {
9. @Resource
10. private ICityDao cityDao;
11. public void print(){
12. System.out.println("这是服务层方法");
13. }
14. public long getCityCount(){
15. return cityDao.countAll();
16. }
17. public long deleteCityById(long id) {
18. cityDao.deleteCityById(id);
19. return id;
20. }
21. public List<CityEO> getAllCitys(){
22. return cityDao.getAllCitys();
23. }
24. }

TestController.java

1. package com.xx.demo.web.test;
2. import java.util.HashMap;
3. import java.util.List;
4. import java.util.Map;
5. import javax.annotation.Resource;
6. import javax.servlet.http.HttpServletRequest;
7. import org.springframework.stereotype.Controller;
8. import org.springframework.ui.ModelMap;
9. import org.springframework.web.bind.annotation.RequestMapping;
10. import org.springframework.web.bind.annotation.ResponseBody;
11. import com.xx.demo.bsh.test.TestService;
12. import com.xx.demo.entity.test.CityEO;
13. @Controller
14. public class TestController {
15. @Resource
16. private TestService testService;
17. @RequestMapping("/firstPage")
18. public String testMethod(ModelMap model){
19. testService.print();
20. model.put("msg", "velocity 测试");
21. return "test";
22. }
23. @RequestMapping("/getCityCount")
24. @ResponseBody
25. public String getCityCount(){
26. Map<String,Object> result = new HashMap<String,Object>();
27. long count = testService.getCityCount();
28. return String.valueOf(count);
29. }
30. @RequestMapping("/deleteCityById")
31. @ResponseBody
32. public String deleteCityById(HttpServletRequest request){
33. long id = Long.valueOf(request.getParameter("id"));
34. long result = testService.deleteCityById(id);
35. return "delete--OK--"+result;
36. }
37. @RequestMapping("/getAllCitys")
38. public String getAllCitys(HttpServletRequest request,ModelMap model){
39. List<CityEO> citys = testService.getAllCitys();
40. model.put("citys", citys);
41. return "showCitys";
42. }
43. }

运行结果：

只贴 了 getAllCitys