import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionTemplate;
public class TransactionTemplateExample {
    private PlatformTransactionManager transactionManager;
    public TransactionTemplateExample(PlatformTransactionManager transactionManager) {
        this.transactionManager = transactionManager;
    }
    public void executeTransaction() {
        TransactionTemplate transactionTemplate = new TransactionTemplate(transactionManager);
        transactionTemplate.setIsolationLevel(TransactionDefinition.ISOLATION_SERIALIZABLE);
        transactionTemplate.setTimeout(30); // 設(shè)置事務(wù)超時時間（秒）
        transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
        transactionTemplate.execute(status -> {
            // 模擬業(yè)務(wù)邏輯
            try {
                // 假設(shè)這里有一些數(shù)據(jù)庫操作
                System.out.println("執(zhí)行數(shù)據(jù)庫操作...");
                // 模擬一個異常
                throw new RuntimeException("模擬異常");
            } catch (Exception e) {
                // 異常處理邏輯
                System.out.println("捕獲到異常，事務(wù)將回滾");
                throw e;
            }
            // 如果沒有異常，事務(wù)將自動提交
            System.out.println("事務(wù)提交成功");
            return "操作結(jié)果";
        });
    }
}

TransactionStatus status = transactionTemplate.getTransaction(new TransactionDefinition() {
    @Override
    public int getIsolationLevel() {
        return TransactionDefinition.ISOLATION_READ_COMMITTED;
    }
    @Override
    public int getPropagationBehavior() {
        return TransactionDefinition.PROPAGATION_REQUIRES_NEW;
    }
    @Override
    public int getTimeout() {
        return 30;
    }
    @Override
    public boolean isReadOnly() {
        return false;
    }
    @Override
    public String getName() {
        return "customTransaction";
    }
});
// 使用 TransactionStatus
if (status.isNewTransaction()) {
    System.out.println("這是一個新事務(wù)");
}
if (status.isCompleted()) {
    System.out.println("事務(wù)已提交或回滾");
}

TransactionStatus outerStatus = transactionTemplate.getTransaction(new TransactionDefinition() {
    // ...
});
try {
    TransactionStatus innerStatus = transactionTemplate.getTransaction(new TransactionDefinition() {
        // ...
    });
    // 執(zhí)行嵌套事務(wù)中的業(yè)務(wù)邏輯
    // ...
    // 提交或回滾嵌套事務(wù)
    if (innerStatus.isNewTransaction()) {
        innerStatus.setRollbackOnly();
    }
} catch (Exception e) {
    // 處理異常
    if (outerStatus.isNewTransaction()) {
        outerStatus.setRollbackOnly();
    }
} finally {
    // 確保事務(wù)被提交或回滾
    if (outerStatus != null) {
        outerStatus.setRollbackOnly();
    }
}