为了使用Spring Boot结合线程池处理数据库表的分批分页读取和后续加工，你可以遵循以下步骤：
- 配置线程池：在
application.properties或application.yml中配置线程池的基本参数。
# application.properties
threadpool.corePoolSize=5
threadpool.maxPoolSize=10
threadpool.queueCapacity=50
threadpool.keepAliveSeconds=60- 创建配置类，定义线程池的Bean：
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
@Configuration
@EnableAsync
public class ThreadPoolConfig {
@Value("${threadpool.corePoolSize}")
private int corePoolSize;
@Value("${threadpool.maxPoolSize}")
private int maxPoolSize;
@Value("${threadpool.queueCapacity}")
private int queueCapacity;
@Value("${threadpool.keepAliveSeconds}")
private int keepAliveSeconds;
@Bean(name = "taskExecutor")
public Executor taskExecutor() {
ThreadPoolExecutor executor = new ThreadPoolExecutor(corePoolSize, maxPoolSize,
keepAliveSeconds, TimeUnit.SECONDS,
new LinkedBlockingQueue<>(queueCapacity));
return executor;
}
}- 创建服务类，使用
@Async注解来异步执行数据处理任务。
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import java.util.concurrent.Future;
@Service
public class AsyncDataProcessingService {
@Async("taskExecutor")
public Future<Boolean> processDataBatch(List<DataItem> batch) {
// 对数据批次进行处理的逻辑
// ...
return new AsyncResult<>(true);
}
}- 创建数据库读取服务，分批查询数据库并提交给异步服务处理。
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.stereotype.Service;
import java.util.List;
import java.util.concurrent.Future;
import java.util.stream.Collectors;
@Service
public class DatabaseReadingService {
@Autowired
private AsyncDataProcessingService asyncDataProcessingService;
@Autowired
private YourDataRepository dataRepository;
public void readAndProcessDataInBatches() {
int pageNumber =