Springboot整合mybatis

开始学习springboot，找到大神的文章不错，记录下学习过程以备以后忘了啥的。

主要是向 纯洁的微笑 本文出处：http://www.ityouknow.com/

1.注解方式整合

项目结构：

pom文件引入相关jar包

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

  <dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </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-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>1.1.1</version>
    </dependency>
     <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
     <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>
  </dependencies>

application.properties文件中添加数据库相关配置：

mybatis.type-aliases-package=com.zzm.test.domain.entity

spring.datasource.driverClassName = com.mysql.jdbc.Driver
spring.datasource.url = jdbc:mysql:*****
spring.datasource.username = root
spring.datasource.password = *****

实体类UserEntity

public class UserEntity implements Serializable{

    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private String id;
    private String userSex;
    private String nickName;
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getUserSex() {
        return userSex;
    }
    public void setUserSex(String userSex) {
        this.userSex = userSex;
    }
    public String getNickName() {
        return nickName;
    }
    public void setNickName(String nickName) {
        this.nickName = nickName;
    }
    public UserEntity() {
        super();
    }
    public UserEntity(String userSex, String nickName) {
        super();
        this.userSex = userSex;
        this.nickName = nickName;
    }

}   

重点是这个Mapper

public interface UserMapper {

    @Select("SELECT * FROM users")
    @Results({
        @Result(property = "userSex",column = "user_sex"),
        @Result(property = "nickName",column = "nick_name")

    })
    List<UserEntity> getAll();

    @Select("SELECT * FROM users WHERE id = #{id}")
    @Results({
        @Result(property = "userSex",  column = "user_sex"),
        @Result(property = "nickName", column = "nick_name")
    })
    UserEntity getOne(Long id);

    @Insert("INSERT INTO users(user_sex,nick_name) VALUES(#{userSex}, #{nickName})")
    void insert(UserEntity user);

    @Update("UPDATE users SET user_Sex=#{userSex},nick_name=#{nickName} WHERE id =#{id}")
    void update(UserEntity user);

    @Delete("DELETE FROM users WHERE id =#{id}")
    void delete(Long id);
}

然后是spring的配置类

定义了下mapper扫描路径和启动。（在每个mapper类上加@MapperScan注解也可以）

@SpringBootApplication
@MapperScan("com.zzm.test.domain.mapper")
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

然后测试类测试

import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import com.zzm.test.domain.entity.UserEntity;
import com.zzm.test.domain.mapper.UserMapper;

@RunWith(SpringRunner.class)
@SpringBootTest
public class UserMapperTest {
    @Autowired
    private UserMapper userMapper;

    @Test
    public void testInsert() throws Exception {
        userMapper.insert(new UserEntity("男", "李雷"));
        userMapper.insert(new UserEntity("女", "韩梅梅"));
        userMapper.insert(new UserEntity("男", "小明"));

        Assert.assertEquals(3, userMapper.getAll().size());
    }

    @Test
    public void testQuery() throws Exception {
        List<UserEntity> users = userMapper.getAll();
        System.out.println(users.toString());
    }

    @Test
    public void testUpdate() throws Exception {
        UserEntity user = userMapper.getOne(2L);
        System.out.println(user.toString());
        user.setNickName("neo");
        userMapper.update(user);
        Assert.assertTrue(("neo".equals(userMapper.getOne(2l).getNickName())));
    }
}

一切ok 库中也有了数据。

2简单XML文件整合

项目结构：

pom文件配置同注解方式

application.properties中新增

mybatis.config-locations=classpath:mybatis/mybatis-config.xml
mybatis.mapper-locations=classpath:mybatis/mapper/*.xml

指定配置文件和mapper.xml文件位置

实体类UserEntity同上

UserMapper

public interface UserMapper {
    List<UserEntity> getAll();

    UserEntity getOne(Long id);

    void insert(UserEntity user);

    void update(UserEntity user);

    void delete(Long id);
}   

Application配置类同上

mybatis-config

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">

    <configuration>
        <typeAliases>
            <typeAlias alias="Integer" type="java.lang.Integer" />
            <typeAlias alias="Long" type="java.lang.Long" />
            <typeAlias alias="HashMap" type="java.util.HashMap" />
            <typeAlias alias="LinkedHashMap" type="java.util.LinkedHashMap" />
            <typeAlias alias="ArrayList" type="java.util.ArrayList" />
            <typeAlias alias="LinkedList" type="java.util.LinkedList" />
        </typeAliases>
    </configuration>

</beans>

user-mapper

<?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.zzm.test.domain.mapper.UserMapper">
    <resultMap id="BaseResultMap" type="com.zzm.test.domain.entity.UserEntity" >
        <id column="id" property="id" jdbcType="INTEGER" />
        <result column="user_sex" property="userSex" />
        <result column="nick_name" property="nickName" jdbcType="VARCHAR" />
    </resultMap>

    <sql id="Base_Column_List" >
        id, user_sex, nick_name
    </sql>

    <select id="getAll" resultMap="BaseResultMap"  >
       SELECT 
       <include refid="Base_Column_List" />
       FROM users
    </select>

    <select id="getOne" parameterType="java.lang.Long" resultMap="BaseResultMap" >
        SELECT 
       <include refid="Base_Column_List" />
       FROM users
       WHERE id = #{id}
    </select>

    <insert id="insert" parameterType="com.zzm.test.domain.entity.UserEntity" >
       INSERT INTO 
            users
            (user_sex,nick_name) 
        VALUES
            (#{userSex}, #{nickName})
    </insert>

    <update id="update" parameterType="com.zzm.test.domain.entity.UserEntity" >
       UPDATE 
            users 
       SET 
        <if test="userSex != null">user_Sex = #{userSex},</if>
        nick_name = #{nickName}
       WHERE 
            id = #{id}
    </update>

    <delete id="delete" parameterType="java.lang.Long" >
       DELETE FROM
             users 
       WHERE 
             id =#{id}
    </delete>

</mapper>

测试类UserMapperTest同上

清空下原来表（truncate users）中数据重新测试，一切ok