服务层的配置发布服务

TestMapper.java

package com.taotao.mapper;

/**
 * 测试接口，查询当前的时间
 */
public interface TestMapper {
	public String queryNow();
}

TestMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.taotao.mapper.TestMapper">
	<select id="queryNow" resultType="string">
		select NOW()
	</select>
</mapper>

　　

TestService.java

package com.taotao.service;

/**
 * 测试 接口 查询当前时间
 */
public interface TestService {
	//查询当前的时间
	public String queryNow();
}

　　

TestServiceImpl.java

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package com.taotao.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.taotao.mapper.TestMapper;
import com.taotao.service.TestService;

@Service
public class TestServiceImpl implements TestService {

	@Autowired
	private TestMapper mapper;
	
	@Override
	public String queryNow() {
		//1.注入mapper 
		//2.调用mapper的方法 返回
		return mapper.queryNow();
	}

}