Java泛型Spring2.5注入，产生错误，求关注

package com.entity;public class TestClass1 {    public void returnClass() {        System.out.println("得到了TestClass1类对象");    }}package com.entity;public class TestClass2 {    public void returnClass() {        System.out.println("得到了TestClass2类对象");    }}

package com.generic;public interface GenericInter<T> {    T findById();}

package com.generic;import java.io.Serializable;import java.lang.reflect.ParameterizedType;import java.lang.reflect.Type;import java.util.ArrayList;import java.util.List;public class GenericImpl<T> implements GenericInter<T> {    private Class<T> classType;    public GenericImpl(Class<T> classType) {        // Type genType = getClass().getGenericSuperclass();        // Type[] params = ((ParameterizedType)        // genType).getActualTypeArguments();        // this.classType = (Class) params[0];        this.classType = classType;    }    @SuppressWarnings("unchecked")    public T findById() {        return (T) classType;    }}

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">    <bean id="testClass1" class="com.entity.TestClass1" />    <bean id="testClass2" class="com.entity.TestClass2" />    <bean id="genericImpl1" class="com.generic.GenericImpl">        <constructor-arg value="com.entity.TestClass1" />    </bean>    <bean id="genericImpl2" class="com.generic.GenericImpl">        <constructor-arg value="com.entity.TestClass1" />    </bean></beans>

package com.test;import org.springframework.beans.factory.BeanFactory;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.entity.TestClass1;import com.generic.GenericImpl;public class Client {    public static void main(String[] args) {           /// 采用Spring的注入方式获得泛型后的对象       /// BeanFactory beanFactory = new ClassPathXmlApplicationContext("applicationContext.xml");       /// GenericImpl impl1 = (GenericImpl) beanFactory.getBean("genericImpl1");        ///直接访问泛型对象        GenericImpl<TestClass1> impl1 = new GenericImpl<TestClass1>(TestClass1.class);        TestClass1 testClass1 = (TestClass1) impl1.findById();        testClass1.returnClass();    }}