自定义注解以及反射得到当前的调用方法

矫情吗；* 2022-08-19 11:11 224阅读 0赞

自定义注解以及反射得到当前的调用方法

下面的这个方法很好的，得到现在被调用的方法

StackTraceElement[] stacks = new Exception().getStackTrace();
String methodName = stacks[1].getMethodName();
System.out.println(“methodName: “+ methodName);

Main.java

  1. package com.paincupid.springmvc.application.annotation.currClass;
  3. import com.paincupid.springmvc.test.domain.Person;
  5. public class Main {
  7.     public static void main(String[] args) {
  9.        PersonObj po = new PersonObj();
  10.        po.add(new Person());
  12.     }
  13. }

BaseLog.java

  1. package com.paincupid.springmvc.application.annotation.currClass;
  3. import java.lang.annotation.Annotation;
  4. import java.lang.reflect.InvocationTargetException;
  5. import java.lang.reflect.Method;
  7. public class BaseLog {
  9.     public void logger(){
  11.         Class clazz = this.getClass();
  12.         String annId = "";
  13.         try {
  14.             Object obj = clazz.getConstructor(new Class[]{}).newInstance(new Object[]{});
  15.             Method[] methods = clazz.getDeclaredMethods();
  17.             StackTraceElement[] stacks = new Exception().getStackTrace();
  18.             String methodName = stacks[1].getMethodName();
  19.             System.out.println("methodName: "+ methodName);
  21.             for (Method method : methods) {
  23.                 if(method.isAnnotationPresent(OpLogger.class) && method.getName().equals(methodName)){
  24.                     OpLogger logger = method.getAnnotation(OpLogger.class);
  25.                     annId = logger.id();
  26.                     String clazzName = clazz.getName();
  27.                     System.out.println("clazzName: "+clazzName + ", methodName: "+methodName +", annId: "+annId);
  28.                 }
  29.             }
  34.         } catch (InstantiationException e) {
  35.             // TODO Auto-generated catch block
  36.             e.printStackTrace();
  37.         } catch (IllegalAccessException e) {
  38.             // TODO Auto-generated catch block
  39.             e.printStackTrace();
  40.         } catch (IllegalArgumentException e) {
  41.             // TODO Auto-generated catch block
  42.             e.printStackTrace();
  43.         } catch (InvocationTargetException e) {
  44.             // TODO Auto-generated catch block
  45.             e.printStackTrace();
  46.         } catch (NoSuchMethodException e) {
  47.             // TODO Auto-generated catch block
  48.             e.printStackTrace();
  49.         } catch (SecurityException e) {
  50.             // TODO Auto-generated catch block
  51.             e.printStackTrace();
  52.         }
  57.     }
  58. }

OpLogger.java

  1. package com.paincupid.springmvc.application.annotation.currClass;
  3. import java.lang.annotation.Documented;  
  4. import java.lang.annotation.ElementType;  
  5. import java.lang.annotation.Retention;  
  6. import java.lang.annotation.RetentionPolicy;  
  7. import java.lang.annotation.Target;  
  9. @Retention(RetentionPolicy.RUNTIME)//注解会在class中存在，运行时可通过反射获取  
  10. @Target(ElementType.METHOD)//目标是方法  
  11. @Documented//文档生成时，该注解将被包含在javadoc中，可去掉  
  12. public @interface OpLogger {  
  14.     public String id() default "-1";  
  16. }

PersonObj.java

  1. package com.paincupid.springmvc.application.annotation.currClass;
  3. import java.util.List;
  5. import com.paincupid.springmvc.test.domain.Person;
  6. import com.paincupid.springmvc.util.BaseJsonRst;
  8. public class PersonObj extends BaseLog{  
  10.     public BaseJsonRst<List<Person>> search(String id) {  
  11.         BaseJsonRst<List<Person>> ret =  new BaseJsonRst<List<Person>>();
  12.         return ret;
  13.     }
  15.     @OpLogger(id = "123add")
  16.     public BaseJsonRst<List<Person>> add(Person person){
  17.         BaseJsonRst<List<Person>> ret =  new BaseJsonRst<List<Person>>();
  18.         logger();
  19.         return ret;
  20.     }
  21.     @OpLogger(id = "456delete")
  22.     public BaseJsonRst<List<Person>> delete(Person person){
  23.         BaseJsonRst<List<Person>> ret =  new BaseJsonRst<List<Person>>();
  25.         return ret;
  26.     }
  28.     @OpLogger(id = "update789")
  29.     public BaseJsonRst<List<Person>> updatge(Person person){
  30.         BaseJsonRst<List<Person>> ret =  new BaseJsonRst<List<Person>>();
  31.         return ret;
  32.     }
  33. }

Person.java 

  1. package com.paincupid.springmvc.test.domain;
  3. import com.paincupid.springmvc.util.Page;
  5. public class Person extends Page{
  6.     private String id;
  7.     private String name;
  8.     private int age;
  9.     private String tel;
  10.     private String prov;
  11.     private String city;
  12.     private String town;
  13.     private String sex;
  14.     private String location;
  15.     private String company;
  16.     private String comment;
  18.     public int getAge() {
  19.         return age;
  20.     }
  21.     public void setAge(int age) {
  22.         this.age = age;
  23.     }
  24.     public String getProv() {
  25.         return prov;
  26.     }
  27.     public void setProv(String prov) {
  28.         this.prov = prov;
  29.     }
  30.     public String getCity() {
  31.         return city;
  32.     }
  33.     public void setCity(String city) {
  34.         this.city = city;
  35.     }
  36.     public String getTown() {
  37.         return town;
  38.     }
  39.     public void setTown(String town) {
  40.         this.town = town;
  41.     }
  42.     public String getSex() {
  43.         return sex;
  44.     }
  45.     public void setSex(String sex) {
  46.         this.sex = sex;
  47.     }
  48.     public String getLocation() {
  49.         return location;
  50.     }
  51.     public void setLocation(String location) {
  52.         this.location = location;
  53.     }
  54.     public String getCompany() {
  55.         return company;
  56.     }
  57.     public void setCompany(String company) {
  58.         this.company = company;
  59.     }
  60.     public String getId() {
  61.         return id;
  62.     }
  63.     public void setId(String id) {
  64.         this.id = id;
  65.     }
  66.     public String getName() {
  67.         return name;
  68.     }
  69.     public void setName(String name) {
  70.         this.name = name;
  71.     }
  72.     public String getComment() {
  73.         return comment;
  74.     }
  76.     public String getTel() {
  77.         return tel;
  78.     }
  79.     public void setTel(String tel) {
  80.         this.tel = tel;
  81.     }
  82.     public void setComment(String comment) {
  83.         this.comment = comment;
  84.     }
  86. }

BaseJsonRst.java

  1. package com.paincupid.springmvc.util;
  3. import java.io.Serializable;
  4. import java.util.Map;
  6. public class BaseJsonRst<T> extends Page implements Serializable{
  7.     private static final long serialVersionUID = 1L;
  8.     private boolean success;    //成功或失败的标志
  9.     private T result;    //结果集
  10.     private String message;    //成功或失败的信息
  12.     public boolean isSuccess() {
  13.         return success;
  14.     }
  16.     public void setSuccess(boolean success) {
  17.         this.success = success;
  18.     }
  20.     public T getResult() {
  21.         return result;
  22.     }
  24.     public void setResult(T result) {
  25.         this.result = result;
  26.     }
  28.     public String getMessage() {
  29.         return message;
  30.     }
  32.     public void setMessage(String message) {
  33.         this.message = message;
  34.     }
  36.     public static <T> BaseJsonRst<T> create() {
  37.         return new BaseJsonRst<T>();
  38.     }
  40.     public BaseJsonRst<T> success(T t){
  41.         this.setResult(t);
  42.         this.setSuccess(true);
  43.         return this;
  44.     }
  45.     public BaseJsonRst<T> fail(String msg){
  46.         this.setMessage(msg);
  47.         this.setSuccess(false);
  48.         this.setTotalCounts(1);
  49.         return this;
  50.     }
  51.     public static <T> BaseJsonRst<T> newSucc(T t){
  52.         BaseJsonRst<T> rst = new BaseJsonRst<T>();
  53.         rst.setResult(t);
  54.         rst.setSuccess(true);
  55.         return rst;
  56.     }
  57.     public static <T> BaseJsonRst<T> newFail(String msg){
  58.         BaseJsonRst<T> rst = new BaseJsonRst<T>();
  59.         return rst.fail(msg);
  60.     }
  61.     public BaseJsonRst<T> debug(String di){
  62.         return this;
  63.     }
  64. }

Page.java

  1. package com.paincupid.springmvc.util;
  3. public class Page {
  4.     private static final long serialVersionUID = 1L;
  6.     public int totalCounts=0;    //设置分页的总条目数
  7.     public int pageSize = 20;    //设置每一页的条目数, 默认20条数据
  8.     public int currentPage = 1;    //设置当前的页码
  10.     public int getTotalCounts() {
  11.         return totalCounts;
  12.     }
  13.     public void setTotalCounts(int totalCounts) {
  14.         this.totalCounts = totalCounts;
  15.     }
  16.     public int getPageSize() {
  17.         return pageSize;
  18.     }
  19.     public void setPageSize(int pageSize) {
  20.         this.pageSize = pageSize;
  21.     }
  22.     public int getCurrentPage() {
  23.         return currentPage;
  24.     }
  25.     public void setCurrentPage(int currentPage) {
  26.         this.currentPage = currentPage;
  27.     }
  31. }

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