@Bean
    public Job demo01StepScopeJob(){
        return jobBuilderFactory.get("demo01StepScopeJob")
                .start(demo01StepScopeStepError(null))
                .build();
    }
    /** 
    ** 這個(gè)時(shí)候在 Step （demo01StepScopeStep） 中添加注解stepscope。
    ** Scope 'step' is not active for the current thread. 這個(gè)說的也很明白，step還沒有裝載初始化完成呢。
    ** 所以只有在step激活，即裝載成功之后才能獲取@Value 這種情況。我們可以把taskle 定義成個(gè)bean來獲取
    **/
    @Bean
    @StepScope 
    public Step demo01StepScopeStepError(@Value("${demo01.param.name}") String paramName){
        return stepBuilderFactory.get("demo01StepScopeStep")
                .tasklet(new Tasklet() {
                    @Override
                    public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
                        logger.info("=======demo01StepScopeStep======paramName:{}",paramName);
                        return null;
                    }
                }).build();
    }
    
    // 改造如下
    
    @Bean
    public Job demo01StepScopeJob(){
        return jobBuilderFactory.get("demo01StepScopeJob")
                .start(demo01StepScopeStep())
                .build();
    }

	//這個(gè)時(shí)候step上面的bean可以不要。因?yàn)閟tepScope只需要定義需要獲取@Value的
    public Step demo01StepScopeStep(){
        return stepBuilderFactory.get("demo01StepScopeStep")
                .tasklet(demo01StepScopeTasklet(null))
                .build();
    }

    @Bean
    @StepScope  //這里的@StepScope 可以有也可以不用。因?yàn)锧value只是在application.properties中的內(nèi)容
    public Tasklet demo01StepScopeTasklet(@Value("${demo01.param.name}") String paramName){
        return new Tasklet() {
            @Override
            public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
                logger.info("=======demo01StepScopeStep======paramName:{}",paramName);
                return null;
            }
        };
    }

	@Bean
    @StepScope
    public Tasklet demo01StepScopeTasklet(@Value("#{jobParameters[rnd]} ") String rnd){
        return new Tasklet() {
            @Override
            public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
                logger.info("=======demo01StepScopeTasklet======rnd:{}",rnd);
                return null;
            }
        };
    }

org.springframework.batch.core.scope.StepScope.java

/**
 * 定義在同一個(gè)線程內(nèi)，多次獲取同一個(gè)bean 獲取的是同一個(gè)。
 * 如果不用該注解 獲取的是不同的bean
 */
public class JackssybinScope implements Scope {

    private final ThreadLocal<Map<String, Object>> threadLoacal = new ThreadLocal<Map<String, Object>>() {
        @Override
        protected Map<String, Object> initialValue() {
            return new HashMap<String, Object>();
        }
    };

    public Object get(String name, ObjectFactory<?> objectFactory) {
        Map<String, Object> scope = threadLoacal.get();
        Object obj = scope.get(name);

        // 不存在則放入ThreadLocal
        if (obj == null) {
            obj = objectFactory.getObject();
            scope.put(name, obj);

            System.out.println("Not exists " + name + "; hashCode: " + obj.hashCode());
        } else {
            System.out.println("Exists " + name + "; hashCode: " + obj.hashCode());
        }

        return obj;
    }

    public Object remove(String name) {
        Map<String, Object> scope = threadLoacal.get();
        return scope.remove(name);
    }

    public String getConversationId() {
        return null;
    }

    public void registerDestructionCallback(String arg0, Runnable arg1) {
    }

    public Object resolveContextualObject(String arg0) {
        return null;
    }

}

@Component
public class JackssybinBPP implements BeanFactoryPostProcessor {
    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
        System.out.println("==============注冊(cè)JackssybinBPP=========");
        beanFactory.registerScope("jackssybinScope", new JackssybinScope());
    }
}

@Service
@Scope("jackssybinScope")
public class JackssybinHaveScopeService {
    public String getMessage() {
        return "Hello World!"+this.hashCode();
    }
}

@Service
public class JackssybinNoScopeService {
    public String getMessage() {
        return "Hello World!"+this.hashCode();
    }
}

@SpringBootTest(classes = {Demo01StepScopeApplication.class})
public class JackssybinScopeTest {
    @Autowired
    ApplicationContext ctx;
    @Test
    public void jackssybinScopetest2(){
        JackssybinHaveScopeService service = ctx.getBean(JackssybinHaveScopeService.class);
        System.out.println(service.getMessage()+"="+service.hashCode());
        JackssybinHaveScopeService service2= ctx.getBean(JackssybinHaveScopeService.class);
        System.out.println(service2.getMessage()+"="+service2.hashCode());
        System.out.println("======================");
        JackssybinNoScopeService service3 = ctx.getBean(JackssybinNoScopeService.class);
        System.out.println(service3.getMessage()+"="+service3.hashCode());
        JackssybinNoScopeService service4= ctx.getBean(JackssybinNoScopeService.class);
        System.out.println(service4.getMessage()+"="+service4.hashCode());
    }
}