经验总结

  1. 首页 > 生活 > >

SpringBoot的starter到底是什么？( 二 )

生活百科

从上面可以看出，pom.xml文件中会引入一些jar包，其中除了引入spring-boot-starter，之外重点看一下：mybatis-spring-boot-autoconfigure 。
我们找到mybatis-spring-boot-autoconfigure.jar文件，打开这个文件 。

SpringBoot的starter到底是什么？

文章插图
里面包含如下文件：
  • pom.properties配置maven所需的项目version、groupId和artifactId
  • pom.xml配置所依赖的jar包
  • additional-spring-configuration-metadata.json手动添加IDE提示功能
  • MANIFEST.MF 这个文件描述了该Jar文件的很多信息
  • spring.factories SPI会读取的文件
  • spring-configuration-metadata.json 系统自动生成的IDE提示功能
  • ConfigurationCustomizer 自定义Configuration回调接口
  • MybatisAutoConfiguration mybatis配置类
  • MybatisProperties mybatis属性类
  • SpringBootVFS 扫描嵌套的jar包中的类
spring-configuration-metadata.json和additional-spring-configuration-metadata.json的功能差不多，我们在applicationContext.properties文件中输入spring时，会自动出现下面的配置信息可供选择，就是这个功能了 。
SpringBoot的starter到底是什么？

文章插图
来自灵魂的一问：这两个文件有什么区别?
答：如果pom.xml中引入了spring-boot-configuration-processor包，则会自动生成spring-configuration-metadata.json 。
如果需要手动修改里面的元数据，则可以在additional-spring-configuration-metadata.json中编辑，最终两个文件中的元数据会合并到一起 。
MybatisProperties类是属性实体类：
@ConfigurationProperties(prefix = MybatisProperties.MYBATIS_PREFIX)public class MybatisProperties {public static final String MYBATIS_PREFIX = "mybatis";private String configLocation;private String[] mapperLocations;private String typeAliasesPackage;private String typeHandlersPackage;private boolean checkConfigLocation = false;private ExecutorType executorType;private Properties configurationProperties;@NestedConfigurationPropertyprivate Configuration configuration;public String getConfigLocation() {return this.configLocation;}public void setConfigLocation(String configLocation) {this.configLocation = configLocation;}@Deprecatedpublic String getConfig() {return this.configLocation;}@Deprecatedpublic void setConfig(String config) {this.configLocation = config;}public String[] getMapperLocations() {return this.mapperLocations;}public void setMapperLocations(String[] mapperLocations) {this.mapperLocations = mapperLocations;}public String getTypeHandlersPackage() {return this.typeHandlersPackage;}public void setTypeHandlersPackage(String typeHandlersPackage) {this.typeHandlersPackage = typeHandlersPackage;}public String getTypeAliasesPackage() {return this.typeAliasesPackage;}public void setTypeAliasesPackage(String typeAliasesPackage) {this.typeAliasesPackage = typeAliasesPackage;}public boolean isCheckConfigLocation() {return this.checkConfigLocation;}public void setCheckConfigLocation(boolean checkConfigLocation) {this.checkConfigLocation = checkConfigLocation;}public ExecutorType getExecutorType() {return this.executorType;}public void setExecutorType(ExecutorType executorType) {this.executorType = executorType;}public Properties getConfigurationProperties() {return configurationProperties;}public void setConfigurationProperties(Properties configurationProperties) {this.configurationProperties = configurationProperties;}public Configuration getConfiguration() {return configuration;}public void setConfiguration(Configuration configuration) {this.configuration = configuration;}public Resource[] resolveMapperLocations() {ResourcePatternResolver resourceResolver = new PathMatchingResourcePatternResolver();List<Resource> resources = new ArrayList<Resource>();if (this.mapperLocations != null) {for (String mapperLocation : this.mapperLocations) {try {Resource[] mappers = resourceResolver.getResources(mapperLocation);resources.addAll(Arrays.asList(mappers));} catch (IOException e) {// ignore}}}return resources.toArray(new Resource[resources.size()]);}}

经验总结扩展阅读


上一篇：大麦小麦和燕麦的区别

下一篇：比较高级的土味情话