SpringAop中的Advice通知實例
一 概述
- @Before:前置通知
- @After :后置通知,方法執(zhí)行完之后
- @AfterReturning:返回通知,完成執(zhí)行之后
- @AfterThrowing:異常通知,拋出異常之后
- @Around:環(huán)繞通知
二 Advice應(yīng)用實例
通過環(huán)繞通知獲取方法執(zhí)行時間
@Component
@Aspect
public class RepositoryAspect {
@Pointcut("execution(* com.repository..*(..))")
private void crud() {
}
//環(huán)繞通知
@Around("crud()")
public Object logPerformance(ProceedingJoinPoint joinPoint) throws Throwable {
long startTimes = System.currentTimeMillis();
Object result = null;
String name = "-";
try {
name = joinPoint.getSignature().toShortString();
result = joinPoint.proceed();
return result;
} catch (Throwable t) {
throw t;
} finally {
long duration = System.currentTimeMillis() - startTimes;
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append(name);
System.out.println(stringBuilder+"執(zhí)行時間為"+duration)
}
}
}public class AbstractAspect {
protected ThreadLocal<Map<String, Object>> threadLocal = new ThreadLocal<>();
protected ThreadLocal<Map<String, Object>> getThreadLocal(){
if (threadLocal.get() == null){
threadLocal.set(new HashMap<>());
}
return threadLocal;
}
}@Component
@Aspect
public class ControllerAspect extends AbstractAspect {
//對于controller包下所有類和方法進行獲取,除被注解NoHealth標(biāo)注的類除外。
@Pointcut("execution(* com.controller..*(..))&&!@annotation(NoHealth)")
private void controllerPointCut() {
}
//在方法執(zhí)行之前對參數(shù)進行處理
@Before(value = "controllerPointCut()")
public void doBefore(JoinPoint joinPoint) {
try {
getThreadLocal().get().put(joinPoint.getSignature().toString(), System.currentTimeMillis());
Object[] args = joinPoint.getArgs();
MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
String[] parameterNamesArray = methodSignature.getParameterNames();
int i = 0;
List<String> argsList = new ArrayList<>();
if (!ObjectUtils.isEmpty(args)) {
for (Object object : args) {
if (ObjectUtils.isEmpty(object)
|| (object instanceof BeanPropertyBindingResult)
|| (object instanceof HttpServletResponse)
|| (object instanceof Boolean)
|| (object instanceof String)
|| (object instanceof Integer)) {
if ((object instanceof Boolean) || (object instanceof String) || (object instanceof Integer)) {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("{\"");
stringBuilder.append(parameterNamesArray[i]);
stringBuilder.append("\":\"");
stringBuilder.append(object);
stringBuilder.append("\"}");
argsList.add(JSONObject.fromObject(String.valueOf(stringBuilder)).toString());
}
i++;
continue;//跳出當(dāng)前循環(huán),且不執(zhí)行此語句后面的語句!
}
if (!(object instanceof HttpServletRequest)) {
argsList.add(JSONObject.fromObject(object).toString());
} else {
HttpServletRequest request = (HttpServletRequest) object;
Enumeration<String> parameterNames = request.getParameterNames();
Map<String, String> argsMap = new HashMap<>();
while (parameterNames.hasMoreElements()) {
String elementName = parameterNames.nextElement();
argsMap.put(elementName, request.getAttribute(elementName).toString());
}
if (!ObjectUtils.isEmpty(argsMap)) {
argsList.add(JSONObject.fromObject(argsMap).toString());
}
}
i++;
}
}
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append(JSONArray.fromObject(argsList));
} catch (Exception e) {
}
}
//對方法執(zhí)行之后的返回值進行某種操作
@AfterReturning(value = "controllerPointCut()", returning = "response")
public void responseLog(JoinPoint joinPoint, Object response) {
try {
if (response == null) {
response = new Object();
}
long duration = System.currentTimeMillis() - (Long) threadLocal.get().get(joinPoint.getSignature().toString());
StringBuilder stringB uilder = new StringBuilder();
stringBuilder.append(JSONObject.fromObject(response));
} catch (Exception e) {
}
}
//對方法拋出的異常進行操作
@AfterThrowing(value = "controllerPointCut()", throwing = "e")
public void exceptionLog(Exception e) {
}
}根據(jù)這些實例就可以參照寫一些簡單的SpringAOP實例了!
到此這篇關(guān)于SpringAop中的Advice通知詳解的文章就介紹到這了,更多相關(guān)Advice通知內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家!
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