获取所有springmvc中注解RequestMapping

思路是检测ClassLoader中所有已加载的类，遍历是否有RequestMapping注解，对存在的逐个打印出来

@Test
public void annotationScan() throws IllegalAccessException {
Field field = null;
try {
field = ClassLoader.class.getDeclaredField("classes");
field.setAccessible(true);
Vector<Class> classes=(Vector<Class>) field.get(this.getClass().getClassLoader());
List<Class> cl=new ArrayList<>(classes);

Iterator<Class> itor=cl.iterator();
while(itor.hasNext()){
Class c=itor.next();
if(c.getAnnotation(RequestMapping.class)!=null){
RequestMapping req= (RequestMapping)c.getAnnotation(RequestMapping.class);
String[] bath=req.path().length>0?req.path():req.value();
if(bath.length==0){
continue ;
}
Method[] ms=c.getDeclaredMethods();
for(Method m : ms){
RequestMapping rm=m.getAnnotation(RequestMapping.class);
if(rm==null){
continue ;
}
String[] bath2=rm.path().length>0?rm.path():rm.value();
if(bath2.length==0){
continue ;
}
System.out.println(bath[0]+bath2[0]);
}
}
}
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
}