两个实现类，放在了不同包下

package com.chen.service.impl;

import org.springframework.stereotype.Service;

import com.chen.service.TestService;
@Service
public class TestServiceImpl implements TestService {

	@Override
	public void test() {
		System.out.println("test");		
	}

}

package com.chen.service.mockimpl;

import org.springframework.stereotype.Service;

import com.chen.service.TestService;
@Service
public class TestServiceMockImpl implements TestService {

	@Override
	public void test() {
		System.out.println("test222222mock");		
	}

}

xml中配置

<!-- 自动扫描，base-package 属性指定了需要扫描的类包，类包及其递归子包中所有的类都会被处理--> 
    <context:component-scan base-package="com.chen">
    	<!-- 排除模拟实现类 
    	<context:exclude-filter type="regex" expression="com.chen.service.mockimpl.*"/>-->
    	<!-- 排除真实实现类 -->
    	<context:exclude-filter type="regex" expression="com.chen.service.impl.*"/>
    </context:component-scan>