Class<T> entityClass = (Class<T>)((ParameterizedType)getClass().getGenericSuperclass()).getActualTypeArguments()[0];

java.lang.ClassCastException: java.lang.Class cannot be cast to java.lang.reflect.ParameterizedType

package cn.pconline.prolib.util;
 import java.lang.reflect.ParameterizedType; 
 import java.lang.reflect.Type; 
 
 public class GenericsUtils { 
 /** 
 * 通过反射,获得定义Class时声明的父类的范型参数的类型. 
 * 如public BookManager extends GenricManager<Book> 
 * 
 * @param clazz The class to introspect 
 * @return the first generic declaration, or <code>Object.class</code> if cannot be determined 
 */ 
 public static Class getSuperClassGenricType(Class clazz) { 
 return getSuperClassGenricType(clazz, 0); 
 } 
 
 /** 
 * 通过反射,获得定义Class时声明的父类的范型参数的类型. 
 * 如public BookManager extends GenricManager<Book> 
 * 
 * @param clazz clazz The class to introspect 
 * @param index the Index of the generic ddeclaration,start from 0. 
 */ 
 public static Class getSuperClassGenricType(Class clazz, int index) throws IndexOutOfBoundsException { 
 
 Type genType = clazz.getGenericSuperclass(); 
 
 if (!(genType instanceof ParameterizedType)) { 
 return Object.class; 
 } 
 
 Type[] params = ((ParameterizedType) genType).getActualTypeArguments(); 
 
 if (index >= params.length || index < 0) { 
 return Object.class; 
 } 
 if (!(params[index] instanceof Class)) { 
 return Object.class; 
 } 
 return (Class) params[index]; 
 } 
 } 

Class<T> entityClass = GenericsUtils.getSuperClassGenricType(BasicService.class, 0);