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通过spring的asm
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| Method[] methods = CarServiceImpl.class.getMethods();
LocalVariableTableParameterNameDiscoverer local=new LocalVariableTableParameterNameDiscoverer();
String[] params=local.getParameterNames( methods[0]);
for(String param: params){
System.out.println(param);
}
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通过javassist
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| Class<?> clazz = Class.forName("com.absurd.rick.service.impl.CarServiceImpl");
ClassPool pool = ClassPool.getDefault();
CtClass cc = pool.get(clazz.getName());
Method[] declaredMethods = clazz.getDeclaredMethods();
for (Method mt:declaredMethods) {
String modifier = Modifier.toString(mt.getModifiers());
Class<?> returnType = mt.getReturnType();
String name = mt.getName();
Class<?>[] parameterTypes = mt.getParameterTypes();
System.out.print("\n"+modifier+" "+returnType.getName()+" "+name+" (");
CtMethod ctm = cc.getDeclaredMethod(name);
MethodInfo methodInfo = ctm.getMethodInfo();
CodeAttribute codeAttribute = methodInfo.getCodeAttribute();
LocalVariableAttribute attribute = (LocalVariableAttribute)codeAttribute.getAttribute(LocalVariableAttribute.tag);
int pos = Modifier.isStatic(ctm.getModifiers()) ? 0 : 1;
for (int i=0;i<ctm.getParameterTypes().length;i++) {
System.out.print(parameterTypes[i]+" "+attribute.variableName(i+pos));
if (i<ctm.getParameterTypes().length-1) {
System.out.print(",");
}
}
System.out.print(")");
Class<?>[] exceptionTypes = mt.getExceptionTypes();
if (exceptionTypes.length>0) {
System.out.print(" throws ");
int j=0;
for (Class<?> cl:exceptionTypes) {
System.out.print(cl.getName());
if (j<exceptionTypes.length-1) {
System.out.print(",");
}
j++;
}
}
}
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