1.SpringBoot整合mybatis说明
项目目录结构
Paste_Image.png
1.pom.xml
org.springframework.boot
spring-boot-starter-parent
1.4.2.RELEASE
4.3.4.RELEASE
3.4.0
1.3.0
2.2.1
4.3.6
18.0
10.2.0.4.0
1.0.15
4.11
UTF-8
1.7
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-test
test
org.springframework
spring-context-support
org.mybatis
mybatis-spring
${mybatis-spring.version}
org.mybatis
mybatis
${mybatis.version}
org.quartz-scheduler
quartz
${quartz.version}
com.oracle
ojdbc14
${oracle.driver.version}
com.alibaba
druid
${druid.version}
2.Application.java
@ComponentScan
@EnableAutoConfiguration
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
3.Config包里面的配置
dataSource的配置，Enviroment加载的是resource目录下的application.properties
@Configuration
public class DruidConfig {
private static Logger logger = LoggerFactory.getLogger(DruidDataSource.class);
@Autowired
Environment env;
@Bean
public DataSource dataSource(){
DruidDataSource ds = new DruidDataSource();
ds.setDriverClassName(env.getProperty("jdbc.driverClassName"));
ds.setUrl(env.getProperty("jdbc.url"));
ds.setUsername(env.getProperty("jdbc.username"));
ds.setPassword(env.getProperty("jdbc.password"));
try {
ds.setFilters("stat,wall");
} catch (SQLException e) {
e.printStackTrace();
logger.error("druid error:{} ",e);
}
return ds;
}
}
Mybatis的扫描配置
/**
* 注意，由于MapperScannerConfigurer执行的比较早，所以必须有下面的注解
* 而且因为SpringBoot优先加载MyBatisMapperScannerConfig，所以必须跟MybatisConfig分开
* @author cjp
* @date 2016年12月8日
*/
@Configuration
@AutoConfigureAfter(MybatisConfig.class)
public class MyBatisMapperScannerConfig {
/**
* mybatis扫描的dao
*/
private static String MYBATIS_DAO = "com.whty.**.client.dao";
/**
* 动态自动装配
* @return
*/
@Bean
public static MapperScannerConfigurer mapperScannerConfigurer(){
MapperScannerConfigurer mapperConfig = new MapperScannerConfigurer();
mapperConfig.setSqlSessionFactoryBeanName("sqlSessionFactory");
mapperConfig.setBasePackage(MYBATIS_DAO);
return mapperConfig;
}
}
/**
* Mybatis连接配置,实现事务配置
* @author cjp
* @date 2016年12月8日
*/
@Configuration
@EnableTransactionManagement
public class MybatisConfig{
private static Logger logger = LoggerFactory.getLogger(MybatisConfig.class);
@Autowired
private DataSource dataSource;
/**
* mybatis.xml配置文件
*/
private static String MYBATIS_CONFIG = "/mybatis/mybatis-config.xml";
/**
* mapper.xml配置文件
*/
private static String MYBATIS_MAPPER = "/mybatis/mappers/**.xml";
/**
* model-package扫描的model
*/
private static String MYBATIS_MODEL = "com.whty.**.client.models";
/**
* Mybatis-SqlSessionFactory初始化
* @return
*/
@Bean
public SqlSessionFactory sqlSessionFactory(){
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
//解决Mybatis-springboot打包jar找不到对应class问题
VFS.addImplClass(SpringBootVFS.class);
bean.setDataSource(dataSource);
bean.setTypeAliasesPackage(MYBATIS_MODEL);
ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
try {
bean.setMapperLocations(resolver.getResources(MYBATIS_MAPPER));
bean.setConfigLocation(resolver.getResource(MYBATIS_CONFIG));
return bean.getObject();
} catch (Exception e) {
e.printStackTrace();
logger.error("mapper.xml error: {}",e);
throw new RuntimeException(e);
}
}
}
/**
* Quartz的配置
*
* @author cjp
* @date 2016年12月9日
*/
@Configuration
public class QuartzConfig {
@Bean(name="jobDetail")
public MethodInvokingJobDetailFactoryBean detailFactoryBean(SyncToAamtyTask task){
MethodInvokingJobDetailFactoryBean jobDetail = new MethodInvokingJobDetailFactoryBean();
//是否并发执行
jobDetail.setConcurrent(false);
jobDetail.setTargetObject(task);
jobDetail.setTargetMethod("execute");
return jobDetail;
}
@Bean(name = "jobTrigger")
public CronTriggerFactoryBean cronJobTrigger(MethodInvokingJobDetailFactoryBean jobDetail) {
CronTriggerFactoryBean tigger = new CronTriggerFactoryBean();
tigger.setJobDetail(jobDetail.getObject());
try {
tigger.setCronExpression("0/5 * * * * ? ");// 每5秒执行一次
} catch (ParseException e) {
e.printStackTrace();
}
return tigger;
}
/**
* quartz调度工厂
*
* @param cronTriggerBean
* @return
*/
@Bean
public SchedulerFactoryBean schedulerFactory(Trigger cronJobTrigger) {
SchedulerFactoryBean bean = new SchedulerFactoryBean();
//用于quartz集群,QuartzScheduler 启动时更新己存在的Job
bean.setOverwriteExistingJobs(true);
//用户Quartz集群
// bean.setDataSource(dataSource);
//延时启动，应用启动20秒后
bean.setStartupDelay(20);
//注册触发器
bean.setTriggers(cronJobTrigger);
return bean;
}
}
**
* @author Hans Westerbeek
* @author Eddú Meléndez
*/
public class SpringBootVFS extends VFS {
@Override
public boolean isValid() {
return true;
}
@Override
protected List list(URL url, String path) throws IOException {
ClassLoader cl = this.getClass().getClassLoader();
ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(cl);
Resource[] resources = resolver.getResources("classpath*:" + path + "/**/*.class");
List resources1 = Arrays.asList(resources);
List resourcePaths = new ArrayList();
for (Resource resource : resources1) {
resourcePaths.add(preserveSubpackageName(resource.getURI(), path));
}
return resourcePaths;
}
private static String preserveSubpackageName(final URI uri, final String rootPath) {
final String uriStr = uri.toString();
final int start = uriStr.indexOf(rootPath);
return uriStr.substring(start, uriStr.length());
}
}
2.SpringBoot整合Mybatis时，会遇到找不到datasource的问题
原因分析：由于MyBatisMapperScannerConfig加载比较早，而且需要将MyBatisMapperScannerConfig与MybatisConfig分开写。这样才能将dataSource正常注入到SqlSessionFactory里面。
3.整合Mybatis时打包成jar文件后，error报错，找不到实体类。
原因分析：由于默认使用的是Mybatis的DefaultVFS进行扫描，需要重新使用SpringBootVFS进行扫描加载，这个可以参考：mybatis-spring-boot-1.1.1
这样打包后的jar文件就可以正常运行了。
4.总结
SpringBoot的使用减少了xml配置，使用Bean更加方便了，而且运行起来更加方便，值得大家使用