SpringBoot防止重复请求，重复表单提交超级简单的注解实现

1. 注解接口

/**
* @description 防止表单重复提交注解
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
@Documented
public @interface DuplicateSubmitToken {

//保存重复提交标记 默认为需要保存
boolean save() default true;
}
2. 定义异常类

/**
* 重复提交异常
*/
public class DuplicateSubmitException extends RuntimeException {
public DuplicateSubmitException(String msg) {
super(msg);
}

public DuplicateSubmitException(String msg, Throwable cause){
super(msg,cause);
}
}

3. 拦截器
 
/**
* @description 防止表单重复提交拦截器
*/
@Aspect
@Component
@Slf4j
public class DuplicateSubmitAspect {
public static final String DUPLICATE_TOKEN_KEY="duplicate_token_key";

@Pointcut("execution(public * cn.test.core.controller..*(..))")

public void webLog() {
}

@Before("webLog() && @annotation(token)")
public void before(final JoinPoint joinPoint, DuplicateSubmitToken token){
if (token!=null){
Object[]args=joinPoint.getArgs();
HttpServletRequest request=null;
HttpServletResponse response=null;
for (int i = 0; i < args.length; i++) {
if (args[i] instanceof HttpServletRequest){
request= (HttpServletRequest) args[i];
}
if (args[i] instanceof HttpServletResponse){
response= (HttpServletResponse) args[i];
}
}

boolean isSaveSession=token.save();
if (isSaveSession){
String key = getDuplicateTokenKey(joinPoint);
Object t = request.getSession().getAttribute(key);
if (null==t){
String uuid= UUID.randomUUID().toString();
request.getSession().setAttribute(key.toString(),uuid);
log.info("token-key="+key);
log.info("token-value="+uuid.toString());
}else {
throw new DuplicateSubmitException(TextConstants.REQUEST_REPEAT);
}
}

}
}

/**
* 获取重复提交key-->duplicate_token_key+','+请求方法名
* @param joinPoint
* @return
*/
public String getDuplicateTokenKey(JoinPoint joinPoint) {
String methodName = joinPoint.getSignature().getName();
StringBuilder key=new StringBuilder(DUPLICATE_TOKEN_KEY);
key.append(",").append(methodName);
return key.toString();
}

@AfterReturning("webLog() && @annotation(token)")
public void doAfterReturning(JoinPoint joinPoint,DuplicateSubmitToken token) {
// 处理完请求，返回内容
log.info("出来方法：");
if (token!=null){
Object[]args=joinPoint.getArgs();
HttpServletRequest request=null;
for (int i = 0; i < args.length; i++) {
if (args[i] instanceof HttpServletRequest){
request= (HttpServletRequest) args[i];
}
}
boolean isSaveSession=token.save();
if (isSaveSession){
String key = getDuplicateTokenKey(joinPoint);
Object t = request.getSession().getAttribute(key);
if (null!=t){
//方法执行完毕移除请求重复标记
request.getSession(false).removeAttribute(key);
log.info("方法执行完毕移除请求重复标记！");
}
}
}
}

/**
* 异常
* @param joinPoint
* @param e
*/
@AfterThrowing(pointcut = "webLog()&& @annotation(token)", throwing = "e")
public void doAfterThrowing(JoinPoint joinPoint, Throwable e, DuplicateSubmitToken token) {
if (null!=token
&& e instanceof DuplicateSubmitException==false){
//处理处理重复提交本身之外的异常
Object[]args=joinPoint.getArgs();
HttpServletRequest request=null;
for (int i = 0; i < args.length; i++) {
if (args[i] instanceof HttpServletRequest){
request= (HttpServletRequest) args[i];
}
}
boolean isSaveSession=token.save();
//获得方法名称
if (isSaveSession){
String key=getDuplicateTokenKey(joinPoint);
Object t = request.getSession().getAttribute(key);
if (null!=t){
//方法执行完毕移除请求重复标记
request.getSession(false).removeAttribute(key);
log.info("异常情况--移除请求重复标记！");
}
}
}
}
}
4. 控制器    使用方法：在你想要避免重复提交的控制器方法添加注解@DuplicateSubmitToken即可
/**
* @description
*/
@RestController
public class TestController {
@RequestMapping(value = "/test", method = RequestMethod.GET)
public Map<String, Object> firstResp (HttpServletRequest request){
Map<String, Object> map = new HashMap<>();
request.getSession().setAttribute("request Url", request.getRequestURL());
map.put("request Url", request.getRequestURL());
return map;
}

@DuplicateSubmitToken
@RequestMapping(value = "/test/d", method = RequestMethod.GET)
public Map<String, Object> test (HttpServletRequest request){

Random r=new Random();
int i = r.nextInt(3);
if (i==2){
throw new CustomException("有异常");
}

try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}

Map<String, Object> map = new HashMap<>();
request.getSession().setAttribute("request Url", request.getRequestURL());
map.put("request Url", request.getRequestURL());
return map;
}
}
5. 测试略过。。。