ssm搭建，maven，javaConfig

基于java配置SSM，eclipse

新建maven，web项目

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项目结构：

jar包

spring和DispatcherServlet上下文，相当于web.xml

  public class DemoWebApplicationInitializer
  	extends AbstractAnnotationConfigDispatcherServletInitializer  {
  	@Override
  	protected Class<?>[] getRootConfigClasses() {
  		// TODO Auto-generated method stub
  		return new Class<?>[] {RootConfig.class};
  	}
  	@Override
  	protected Class<?>[] getServletConfigClasses() {
  		// TODO Auto-generated method stub
  		return new Class<?>[] {WebConfig.class};
  	}
  	@Override
  	protected String[] getServletMappings() {
  		// TODO Auto-generated method stub
  		return new String[] {"/"};
  	}
  }

DispatcherServlet ,相当于springmvc.xml

  @Configuration
  @EnableWebMvc
  @ComponentScan(basePackages = {"com.getword.controller"})
  public class WebConfig extends WebMvcConfigurerAdapter {
  	@Bean
  	public ViewResolver viewResolver() {
  		InternalResourceViewResolver resolver = new InternalResourceViewResolver();
  		resolver.setPrefix("/WEB-INF/views/");
  		resolver.setSuffix(".jsp");
  		resolver.setExposeContextBeansAsAttributes(true);
  		return resolver;
  	}
  	/**
  	 * 静态资源
  	 */
  	@Override
  	public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
  		// TODO Auto-generated method stub
  		configurer.enable();
  	}
  }

spring 上下文,相当于spring.xml

  @Configuration
  @ComponentScan(basePackages = {"com.getword"},
  		excludeFilters = {@Filter(type = FilterType.ANNOTATION, value = EnableWebMvc.class)})
  @Import(DataSourceConfig.class)
  public class RootConfig {
  	@Bean
  	public BeanNameAutoProxyCreator autoProxyCreator() {
  		BeanNameAutoProxyCreator autoProxyCreator = new BeanNameAutoProxyCreator();
  		autoProxyCreator.setProxyTargetClass(true);
  		// 设置要创建代理的那些Bean的名字
  		autoProxyCreator.setBeanNames("*Service");
  		autoProxyCreator.setInterceptorNames("transactionInterceptor");
  		return autoProxyCreator;
  	}
  }

DataSourceConfig, 可以配置在spring.xml中

  @Configuration
  @MapperScan("com.getword.dao")
  public class DataSourceConfig {
  	private final static Logger LOG = Logger.getLogger(DataSourceConfig.class);
  	private String driver = "com.mysql.jdbc.Driver";;
  	private String url = "jdbc:mysql://localhost:3306/spring?characterEncoding=UTF-8&serverTimezone=UTC";
  	private String username = "root";
  	private String password = "123";
  	@Bean
  	public BasicDataSource dataSource() {
  		LOG.info("Initialize the BasicDataSource...");
  		BasicDataSource dataSource = new BasicDataSource();
  		dataSource.setDriverClassName(driver);
  		dataSource.setUrl(url);
  		dataSource.setUsername(username);
  		dataSource.setPassword(password);
  		return dataSource;
  	}
  	// mybatis的配置
  	@Bean
  	public SqlSessionFactoryBean sqlSessionFactoryBean() throws IOException {
  		ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();
  		SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
  		sqlSessionFactoryBean.setDataSource(dataSource());
  		sqlSessionFactoryBean.setMapperLocations(resourcePatternResolver.getResources("classpath*:mappers/*.xml"));
  		sqlSessionFactoryBean.setTypeAliasesPackage("com.getword.domain");// 别名，让*Mpper.xml实体类映射可以不加上具体包名
  		return sqlSessionFactoryBean;
  	}
  
  	// 事务管理器 对mybatis操作数据库事务控制，spring使用jdbc的事务控制类
  	@Bean(name = "transactionManager")
  	public DataSourceTransactionManager dataSourceTransactionManager() {
  		DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager();
  		dataSourceTransactionManager.setDataSource(dataSource());
  		return dataSourceTransactionManager;
  	}
  
  	@Bean(name = "transactionInterceptor")
  	public TransactionInterceptor interceptor() {
  		TransactionInterceptor interceptor = new TransactionInterceptor();
  		interceptor.setTransactionManager(dataSourceTransactionManager());
  		Properties transactionAttributes = new Properties();
  		transactionAttributes.setProperty("save*", "PROPAGATION_REQUIRED");
  		transactionAttributes.setProperty("del*", "PROPAGATION_REQUIRED");
  		transactionAttributes.setProperty("update*", "PROPAGATION_REQUIRED");
  		transactionAttributes.setProperty("get*", "PROPAGATION_REQUIRED,readOnly");
  		transactionAttributes.setProperty("find*", "PROPAGATION_REQUIRED,readOnly");
  		transactionAttributes.setProperty("*", "PROPAGATION_REQUIRED");
  		interceptor.setTransactionAttributes(transactionAttributes);
  		return interceptor;
  	}
  }