1. Spring AOP + 注解 实现拦截(包括Controller层的拦截) -
- 定义注解
@Target({ ElementType.METHOD, ElementType.TYPE })
@Retention(RetentionPolicy.RUNTIME) @Documented public LogAnnotation {String remark() default "操作日志记录";
}
注意:在Spring的主配置文件配置组件扫描 ``` ``` -
- 定义AOP拦截器
@Component
@Aspect public class LogAspect implements Serializable {private static final long serialVersionUID = 1L;
//定义拦截的方法
@Pointcut("@annotation(com.emvc.aspect.LogAnnotation)")
public void methodCachePointcut() {}
//拦截处理
@After("methodCachePointcut() && @annotation(logRemark)")
public void doAfter(JoinPoint jp, LogAnnotation logRemark) throws ClassNotFoundException, NotFoundException {//业务处理
}
}
注:要在spring的配置文件配置, 特别的Controller的代理默认是JDK,如果想要用AOP拦截Controller的方法,需要将Controller的代理交由Cglib(在Spring mvc的配置文件配置 ),expose-proxy将Controller代理交由Cglib。
2.AOP拦截后的参数处理(利用反射获取方法的参数名及其值)
/**
* 返回 参数名=值; **/ private static String writeLogInfo(String[] paramNames, JoinPoint joinPoint) { Object[] args = joinPoint.getArgs(); StringBuilder sb = new StringBuilder(); for (int k = 0; k < args.length; k++) { Object arg = args[k]; sb.append(paramNames[k]); sb.append("=" + arg + ";"); } return sb.toString(); }/**
* 得到方法参数的名称 * * @param cls this.getClass(), * @param clazzName jp.getTarget().getClass().getName() * @param methodName jp.getSignature().getName() * @return 参数名数组 * @throws NotFoundException */ private String[] getFieldsName(Class cls, String clazzName, String methodName) throws NotFoundException { ClassPool pool = ClassPool.getDefault(); ClassClassPath classPath = new ClassClassPath(cls); pool.insertClassPath(classPath); CtClass cc = pool.get(clazzName); CtMethod cm = cc.getDeclaredMethod(methodName); MethodInfo methodInfo = cm.getMethodInfo(); CodeAttribute codeAttribute = methodInfo.getCodeAttribute(); LocalVariableAttribute attr = (LocalVariableAttribute) codeAttribute.getAttribute(LocalVariableAttribute.tag); if (attr == null) { return null; } String[] paramNames = new String[cm.getParameterTypes().length]; int pos = Modifier.isStatic(cm.getModifiers()) ? 0 : 1; for (int i = 0; i < paramNames.length; i++) { paramNames[i] = attr.variableName(i + pos); // paramNames即参数名 } return paramNames; }