组件未自动接线

Question

我有一个正在编写的spring boot / batch应用程序。我的Tasklet中的JdbcTemplate没有自动接线。在execute方法内部，jdbcTemplate为null。有人知道为什么吗？我缺少一些简单的东西。我正在使用月食氧气在项目上运行bootRun任务。

这是主要应用程序。

package x.y;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;

@SpringBootApplication
public class Application {
     public static void main(String[] args) throws Exception {
         SpringApplication.run(Application.class, args);
     }
}

配置类。

 package x.y.z;
 @Configuration
 @PropertySource("classpath:batch-oracle.properties")
 public class DataSourceConfiguration {

     @Autowired
     private Environment environment;

     @Bean(name = "dataSource", destroyMethod = "close")
     public DataSource dataSource() {
          // datasource definition
          return dataSource;
     }

     @Bean()
     public JdbcTemplate jdbcTemplate(DataSource dataSource) {
          return new JdbcTemplate(dataSource);
     }
}

批处理配置类。

 package x.y.z;

 @Configuration
 @EnableBatchProcessing
 public class BatchConfiguration {
     @Autowired
     public JobBuilderFactory jobBuilderFactory;

     @Autowired
     public StepBuilderFactory stepBuilderFactory;

     @Bean
     public Step step1() {
          return stepBuilderFactory.get("step1").tasklet(new 
              ReadWatermark()).build();
     }

     @Bean
     public Job job() {
         return this.jobBuilderFactory.get("job")
            .incrementer(new RunIdIncrementer())
            .start(step1())
            .build();
     }
 }

tasklet类

 package x.y.a
 @Component
 public class ReadWatermark implements Tasklet {

      @Autowired
      public JdbcTemplate jdbcTemplate;

      @Autowired
      public DataSource dataSource;

      @Override
      public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {      
           // tasklet definition
           return RepeatStatus.FINISHED;
      }

      public JdbcTemplate getJdbcTemplate() {
           return jdbcTemplate;
      }

      public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
          this.jdbcTemplate = jdbcTemplate;
      }
 }

我的build.gradle

 buildscript {
       repositories {
            mavenCentral()
       }
       dependencies {
            classpath("org.springframework.boot:spring-boot-gradle-plugin:2.0.2.RELEASE")
        }
  }

  apply plugin: 'java'
  apply plugin: 'eclipse'
  apply plugin: 'org.springframework.boot'
  apply plugin: 'io.spring.dependency-management'

  bootJar {
        baseName = 'blah'
        version =  '1.0.0'
  }

  repositories {
       mavenCentral()
  }

  sourceCompatibility = 1.8
  targetCompatibility = 1.8

  dependencies {
       compile("commons-dbcp:commons-dbcp:1.4")
       compile("org.springframework.boot:spring-boot-starter-batch")
       compile("org.springframework.boot:spring-boot-starter-jdbc")
       compile("org.springframework.boot:spring-boot-starter-web")
       runtime("com.oracle:ojdbc6:11.2.0.4")
   }