如何使用反射从休眠对象中获取数据？

Question

Here is an example of an issue I am having using reflection. This is a simple case, but what I eventually need is to dynamically build the method name on the fly... but even this simple case I can not get to work!

Client1 cData = (Client1) session.get(Client1.class, 1);
int cType = cData.getClientType();
int cType2 = -1;

Method method[] = null;
Method getCTypeMethod = null;

try {
  method = cData.getClass().getMethods();
  for (Method m : method){
    System.out.println(m.getName()); // displays getClientType
  }

  getCTypeMethod = cData.getClass().getMethod("getClientType", int.class);
  if (getCTypeMethod != null){
      cType2 = (int) getCTypeMethod.invoke(cData,  int.class);
  }
} catch (Exception e) {
  e.printStackTrace();
}        
assertEquals(cType,  cType2);

The line:

getCTypeMethod = cData.getClass().getMethod("getClientType", int.class);

Always throws an exception: java.lang.NoSuchMethodException: Client1.getClientType(int)

Answer 1

The method getMethod receives the param classes, not the return type, your getClientType receive a int?

If not, try:

cData.getClass().getMethod("getClientType");