AspectJ section to get method parameters and get specific values

Project requirements: To implement slices through aspectj and to obtain specific parameter values and types

Objective: To obtain the values shared by different parameter objects in different methods in the background

Implementation principle: Use ASPECTJ to intercept and then get the object parameter and then take the value by reflection

Here is the implementation method:

The first is to define the AspectJ file, which is the. aj file

Public aspect UPDATESERVICEASPECTJ {public
    pointcut updateServices1 (Object model)://This model is the same
    as the parameter name Execution (Public * *.*.*.*controller.* (..)) && @annotation (customupdateservices) && args (model); Define use this parameter model after

    (Object O) returning (): UpdateServices1 (o) {//Post notification
        reflectclass.reflect (o); The parameter
	System.out.println (REFLECTCLASS.XQID) is obtained by reflection method.	Parameters common to OBJ

    }

@CustomUpdateServices//This is my custom. No internal parameters are used to intercept and find a way to do this.

The simple thing is to use the slice to get the argument of the worthy words, need to use the cache, but the cache configuration is cumbersome and generally not used

And the simple annotations reflect that we're not getting the parameters, so we need to use the slice and then the proxy gets the parameters and then the values of the parameters are obtained by reflection.

We can make a slice by ASPECTJ.

What we're going to notice here is that the configuration interceptor is after our parameter name to be sent with the exact same parameter name as the Intercept.

Agent parameters as long as the types are the same

And then it's our reflection that gets the values common to the object.

Reflecclass

Package com.hnmzhc.web.commons.updateService;
Import Org.slf4j.Logger;

Import Org.slf4j.LoggerFactory;

Import Java.lang.reflect.Field;
 /** * Created by DAVIDG on 2016/11/8. * @XQID Cell ID * @USERID User ID * * Public class Reflectclass {public static final Logger Logger = Loggerfactory.getlo

    Gger (Reflectclass.class);
    public static Integer xqid = 0;
    public static Integer Wyid = 0;


    public static Integer USERID = 0; /** Incoming parameter * Gets all the properties of the current class by reflection * to determine if there are xqid and UserID * If there is, deposit in the static properties of the current class * @param obj/public Stati
        c void reflect (Object obj) {if (obj = null) return;
        field[] fields = Obj.getclass (). Getdeclaredfields ();
            for (int j = 0; J < Fields.length; J + +) {fields[j].setaccessible (true); try {//Field name if (Fields[j].getname (). Equals ("Xqid")) {if (Fields[j].get) ( OBJ) {//!=null xqid = (Integer) fields[j].get (obj);//Assignment
                    }}else if (Fields[j].getname (). Equals ("UserId")) {if (fields[j].ge
                    T (obj)!=null) {USERID = (Integer) fields[j].get (obj);
                        }else if (Fields[j].getname (). Equals ("Wyid")) {if (Fields[j].get (obj)!=null) {
                    Wyid = (Integer) fields[j].get (obj); } Logger.warn (String.Format ("xqid =%n, Wyid =%n, USERID =%n", xqid, Wyid,userid));
            Print log} catch (Exception e) {e.printstacktrace ();


 }

        }
    }
}

So we can do a slice to get the function of the method parameter.

Of course, if your parameter types are the same here, it'll be easier.

Just replace the type of object in the ASPECTJ with your own pojo/bean.

Be sure to note the use of names and args ()

Then the choice of the specific implementation method

Thanks to the knowledge shared by the older Daniel on the Internet, thank you