详解spring boot mybatis全注解化

<!-- 引入mybatis --> 
<dependency> 
  <groupId>org.mybatis.spring.boot</groupId> 
  <artifactId>mybatis-spring-boot-starter</artifactId> 
  <version>1.3.0</version> 
</dependency> 
<!-- mybatis分页插件 --> 
<dependency> 
  <groupId>com.github.pagehelper</groupId> 
  <artifactId>pagehelper-spring-boot-starter</artifactId> 
  <version>1.1.1</version> 
</dependency> 

@Mapper 
public interface MybatisDao { 
  @Select("select * from user where id = #{id}") 
  public List<User> findById(User param); 

mybatis.configuration.mapUnderscoreToCamelCase=true 

@Results({ 
  @Result(property="nnNn",column="NN_NN")   
}) 
@Select("select * from user")   
public List<Map> findAll();  

@Results(id="user",value={ 
  @Result(property="nnNn",column="NN_NN") 
}) 

@Service 
@Transactional 
public class HelloServiceImpl { 
  @Autowired 
  MybatisDao mybatisDao; 
  public void find(){  
    //分页插件: 查询第1页，每页10行 
    Page<User> page =PageHelper.startPage(1, 10);  
    mybatisDao.findAll();  
    //数据表的总行数 
    page.getTotal(); 
    //分页查询结果的总行数 
    page.size(); 
    //第一个User对象，参考list，序号0是第一个元素，依此类推 
    page.get(0); 
  } 

@Insert("insert into user(name) values(#{name})") 
@Options(useGeneratedKeys=true,keyProperty="id")  
public int add(User param); 

User user = new User(); 
user.setName("tom"); 
mybatisDao.add(user); 
System.out.println("回传ID值："+user.getId()); 

DELIMITER $$ 
CREATE PROCEDURE `hello`(IN id_in VARCHAR(10),OUT name_out VARCHAR(10)) 
BEGIN 
     SELECT NAME INTO name_out FROM USER WHERE id=id_in; 
  END$$ 
DELIMITER ; 

@Select("call hello(#{id,mode=IN,jdbcType=VARCHAR},#{name,mode=OUT,jdbcType=VARCHAR})") 
@Options(statementType= StatementType.CALLABLE ) 
public void call(User user); 

public void call(){ 
  User user = new User(); 
  user.setId("14"); 
  mybatisDao.call(user); 
  System.out.println(user.getName());