java reflect bits

public class ReflectUtil {
	
	public static Class reflectClass(String className){
		try {
			return Class.forName(className);
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
		return null;
	}
	
	public static Object getClassInstance(Class clazz, 
			HttpServletRequest request, HttpServletResponse response){
		try {
			Object ins = clazz.newInstance();
			//invoke setHttpServlet of BaseAction to initialize instance of XXXAction 
			invokeMethodWithArgs(clazz.getSuperclass(), ins, "setHttpServlet",
					new Class[]{HttpServletRequest.class, HttpServletResponse.class}, 
					request, response);
			setAttributesForInstance(clazz,ins,request,null);
			return ins;
		} catch (Exception e) {
			e.printStackTrace();
		} 
		return null;
	}
	
	private static void setAttributesForInstance(Class clazz, Object ins,
			HttpServletRequest request, String prefix) throws Exception {
		if(prefix!=null&&prefix.indexOf(".")!=-1) return; //不给二级属性赋值
		Field[] fields = clazz.getDeclaredFields();
		for(Field f : fields){
			f.setAccessible(true);
			String typeClass = f.getType().getSimpleName();
			String fname = f.getName();
			if(prefix!=null) fname = prefix+"."+fname;
			String paramValue = request.getParameter(fname);
			try {
				if("int".equalsIgnoreCase(typeClass)||"integer".equalsIgnoreCase(typeClass)){
					if(paramValue != null) f.set(ins, Integer.parseInt(paramValue));
				}else if("float".equalsIgnoreCase(typeClass)){
					if(paramValue != null) f.set(ins, Float.parseFloat(paramValue));
				}else if("double".equalsIgnoreCase(typeClass)){
					if(paramValue != null) f.set(ins, Double.parseDouble(paramValue));
				}else if("long".equalsIgnoreCase(typeClass)){
					if(paramValue != null) f.set(ins, Long.parseLong(paramValue));
				}else if("short".equalsIgnoreCase(typeClass)){
					if(paramValue != null) f.set(ins, Short.parseShort(paramValue));
				}else if("boolean".equalsIgnoreCase(typeClass)){
					if(paramValue != null) f.set(ins, Boolean.parseBoolean(paramValue));
				}else if("object".equalsIgnoreCase(typeClass)||"string".equalsIgnoreCase(typeClass)){
					if(paramValue != null) f.set(ins, paramValue);
				}else{
					Object fieldIns = f.getType().getConstructor().newInstance();
					f.set(ins, fieldIns);
					setAttributesForInstance(f.getType(), fieldIns, request, fname);
				}
			} catch (IllegalArgumentException e) {
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				e.printStackTrace();
			}
		}
	}

	public static Object invokeMethodNoArgs(Class clazz, Object classInstance, String methodName){
		Object result = null;
		try {
			Method method = clazz.getMethod(methodName);
			method.setAccessible(true);
			result = method.invoke(classInstance);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return result;
	}
	
	public static Object invokeMethodWithArgs(Class clazz, Object classInstance, String methodName, Class[] argType, Object...args){
		Object result = null;
		try {
			Method method = clazz.getDeclaredMethod(methodName, argType);
			Class returnType = method.getReturnType();
			method.setAccessible(true);
			result = method.invoke(classInstance, args);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return result;
	}
}