关于aop切面 注解、参数如何获取

目录

aop切面 注解、参数如何获取

在工作中会经常使用aop，这里将aop使用基本方法，获取在切点中使用的获取参数、注解做一个样例。

定义需要切面的注解

@target(elementtype.method)@retention(retentionpolicy.runtime)@documentedpublic @interface anndemo {  string value();  boolean isaop() default true;}

在需要进行切面的方法标注注解

@restcontroller@requestmapping("/order")public class ordercontroller {  @autowired  pri烈火英雄电影vate orderrvice orderrvice;  @requestmapping("/all")  @anndemo(value = "all",isaop = fal)  一拍两散歌词public list<tborder> findall() {    list<tborder> list = orderrvice.getorderlist();    return list;  }  @requestmapping("/page")  @anndemo(value = "page")  public list<tborder> findpage(@requestparam("urname") string urname) {    list<tborder> listpage = orderrvice.getorderslistpage();    return listpage;  }}

定义切面

在切面中获取切点注解，方法，参数的获取

@aspect@componentpublic class aspectdemo {    @pointcut(value = "execution(* com.yin.freemakeradd.controller..*(..))")    public void excetionmethod() {}    @pointcut(value = "execution(* com.yin.freemakeradd.controller..*(..)) && @annotation(anndemo)")    public void excetionnote() { }    @before("excetionmethod()")    public void testbefore(joinpoint joinpoint) {        幻听 许嵩system.out.println("----------------------------前置通知---");        object[] args = joinpoint.getargs();        for (object arg : args) {            system.out.println(arg);        }    }    @around(value = "execution(* com.yin.freemakeradd.controller..*(..)) && @annotation(anndemo)")    public object  testbeforenote(proceedingjoinpoint joinpoint) throws throwable {        //用的最多通知的签名        signature signature = joinpoint.getsignature();        methodsignature msg=(methodsignature) signature;        object target = joinpoint.gettarget();        //获取注解标注的方法        method method = target.getclass().getmethod(msg.getname(), msg.getparametertypes());        //通过方法获取注解        anndemo annotation = method.getannotation(anndemo.class);        object proceed;        //获取参数        object[] args = joinpoint.getargs();        system.out.println(annotation.value());        system.out.println(annotation.isaop());        for (object arg : args) {            system.out.println(arg);        }        if (objects.isnull(annotation) || !annotation.isaop()) {            system.out.println("无需处理");            proceed = joinpoint.proceed();        }el {            system.out.println("进入aop判断");            proceed = joinpoint.proceed();            if(proceed instanceof list){                list proceedlst = (list) proceed;                if(!collectionutils.impty(proceedlst)){                    tborder tborder = new tborder();                    tborder.tpaymenttype("fffffffffffffffffff");                    arraylist<tborder> tborderlst = new arraylist<>();                    tborderlst.add(tborder);                    return tborderlst;                }            }            system.out.println(proceed);        }        return proceed;    }}

aop中获取自定义注解的属性值

自定义注解

@target(elementtype.method)@retention(retentionpo李小凯licy.runtime)public @interface systemlog { public string description() default "";}

用在方法上

@responbody@validrequestbody@requestmapping("/login")@systemlog(description="登录")public globalrespon login(@requestbody @valid ur ur, bindingresult bindingresult){  ......}

获取注解的属性值

@around("@annotation(com.xxx.xxx.xxx.systemlog)")public object around(proceedingjoinp武汉教师资格证oint joinpoint) throws throwable{  systemlog systemlog = ((methodsignature)joinpoint.getsignature()).getmethod().getannotation(systemlog.class);    ......}

以上为个人经验，希望能给大家一个参考，也希望大家多多支持www.887551.com。