一、try-catch
public class MyTest { public static void main(String [] args) { try{ testRedo(); } catch (Exception e) { testRedo(); e.printStackTrace(); } } private static void testRedo() { System.out.println("执行Redo代码"); throw new RuntimeException(); } }二、do-while（包括变种：while、递归）
public class MyTest { public static void main(String [] args) { int maxRetryTime = 5; int time = 0; String result = null; do { time++; try { result = testRedo(); } catch (Exception e) { e.printStackTrace(); } } while (null == result && time < maxRetryTime); } private static String testRedo() { System.out.println("执行Redo代码"); // 操作成功，返回结果，操作失败返回null return null; } }三、spring-retry
import org.springframework.retry.RecoveryCallback; import org.springframework.retry.RetryCallback; import org.springframework.retry.RetryContext; import org.springframework.retry.policy.SimpleRetryPolicy; import org.springframework.retry.support.RetryTemplate; public class MyTest { public static void main(String [] args) { final String params = "传入参数,可为任意类型，final修饰即可"; // 重试机制 RetryTemplate oRetryTemplate = new RetryTemplate(); SimpleRetryPolicy oRetryPolicy = new SimpleRetryPolicy(); oRetryPolicy.setMaxAttempts(5);// 重试5次 oRetryTemplate.setRetryPolicy(oRetryPolicy); try { // obj为doWithRetry的返回结果，可以为任意类型 Object obj = oRetryTemplate.execute(new RetryCallback<Object, Exception>() { @Override public Object doWithRetry(RetryContext context) throws Exception {// 开始重试 System.out.println(params); testRedo(); return "此处可返回操作结果"; } }, new RecoveryCallback<Object>() { @Override public Object recover(RetryContext context) throws Exception { // 重试多次后都失败了 return null; } }); } catch (Exception e) { e.printStackTrace(); } } private static void testRedo() { System.out.println("执行Redo代码"); throw new RuntimeException(); } }需要spring jar包：spring-retry-1.2.0.RELEASE.jar 任意版本
