需求： 若代码出现异常，则每隔一段时间重试一下，重试n次

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.function.Supplier;

public class RetryUtils {
    private static final Logger log = LoggerFactory.getLogger(RetryUtils.class);

    /**
     *
     * @param count 重试次数
     * @param millisecond 时间间隔
     * @param supplier
     * @param <T>
     * @return
     * @throws Exception
     */
    public static <T> T retryWhenException(int count, int millisecond, Supplier<T> supplier) throws Exception {
        T result = null;
        while (count > 0) {
            try {
                result = supplier.get();
                count=0;
            } catch (Exception e) {
                log.info(e.getMessage());
                Thread.sleep(millisecond);
                --count;
                if (count == 0) {
                    throw e;
                }
            }
        }
        return result;
    }
}

使用示例：