（二十）SpringBoot之集成mybatis：使用mybatis注解

• 一、使用mybatis注解的集成

　　1.1　　引入maven依赖

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.2.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>
    </dependencies>

　　1.2　　配置application.properties

# mysql
spring.datasource.url=jdbc:mysql://localhost/db_boot?useUnicode=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

logging.level.com.shyroke.mapper=debug

• logging.level.com.shyroke.mapper=debug表示打印出sql语句 logging.level.mapper所在包

　　1.3　　实体类

package com.shyroke.bean;

import java.io.Serializable;
import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

public class UserBean implements Serializable {

    /**
     *
     */
    private static final long serialVersionUID = 1L;

    private Integer id;

    private String userName;

    private String passWord;

    private Date createTime;

    //省略getset和toString方法

}

　　1.4　　编写控制器

package com.shyroke.controller;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.shyroke.bean.UserBean;
import com.shyroke.mapper.UserMapper;

@Controller
@RequestMapping(value = "/")
public class UserController {

    @Autowired
    private UserMapper userMapper;

    @RequestMapping(value="/users")
    @ResponseBody
    public List<UserBean> getUsers() {

        List<UserBean> userList = userMapper.getUsers();

        return userList;

    }

    @ResponseBody
    @RequestMapping(value="/update")
    public List<UserBean> update() {
        UserBean user=new UserBean();
        user.setId(1);
        user.setUserName("updateName");
        user.setPassWord("123");
        user.setCreateTime(new Date());
        userMapper.update(user);
        return userMapper.getUsers();

    }

    @ResponseBody
    @RequestMapping(value="/del")
    public List<UserBean> del(){

        userMapper.del(1);

        return userMapper.getUsers();
    }

    @ResponseBody
    @RequestMapping(value="add")
    public List<UserBean> add(){

        UserBean user=new UserBean();
        user.setUserName("test");
        user.setPassWord("111");
        user.setCreateTime(new Date());

        userMapper.save(user);
        return userMapper.getUsers();
    }

}

　　1.5　　编写mapper

package com.shyroke.mapper;

import java.util.List;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Options;
import org.apache.ibatis.annotations.Result;
import org.apache.ibatis.annotations.Results;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;
import org.apache.ibatis.type.JdbcType;

import com.shyroke.bean.UserBean;

@Mapper
public interface UserMapper {

    /**
     * 获取所有用户
     *
     * @return
     */
    @Select(value = "select * from users")
    @Results(value = { @Result(column = "user_name", property = "userName", jdbcType = JdbcType.VARCHAR),
            @Result(column = "pass_word", property = "passWord", jdbcType = JdbcType.VARCHAR),
            @Result(column = "create_time", property = "createTime", jdbcType = JdbcType.DATE) })
    List<UserBean> getUsers();

    /**
     * 修改用户信息
     *
     * @param user
     */
    @Update("update users set user_name= #{userName},pass_word=#{passWord},create_time=#{createTime} where id=#{id}")
    void update(UserBean user);

    /**
     * 删除用户
     *
     * @param id用户id
     */
    @Delete("delete from users where id=#{id}")
    void del(int id);

    /**
     * 新增一条用户信息
     *
     * @param user
     */
    @Insert("insert into users(user_name,pass_word,create_time) values(#{userName},#{passWord},#{createTime})")
    void save(UserBean user);

}

　　1.6　　结果