spring boot整合mybatis的xml方式

1、在pom.xml里面除了引入基本的父工程和starter所生成的依赖外,还需引入如下坐标

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>
<!-- druid连接池 -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.0.15</version>
</dependency>
<!-- SpringBoot的Mybatis启动器 -->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>1.1.1</version>
</dependency>

2、application.properties文件配置

spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/dbgirl
spring.datasource.username=root
spring.datasource.password=root

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

mybatis.config-locations=classpath:mybatis/mybatis-config.xml
mybatis.mapper-locations=classpath:mybatis/mapper/*.xml
mybatis.type-aliases-package=com.testxml.domain

注意:如果mybatis的xml文件和mapper接口如果对应不起来的话,会报找不到方法的错误

3、mybatis-config.xml配置:

<?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>
    <settings>
        <setting name="callSettersOnNulls" value="true"/>
        <setting name="cacheEnabled" value="true"/>
        <setting name="lazyLoadingEnabled" value="true"/>
        <setting name="aggressiveLazyLoading" value="true"/>
        <setting name="multipleResultSetsEnabled" value="true"/>
        <setting name="useColumnLabel" value="true"/>
        <setting name="useGeneratedKeys" value="false"/>
        <setting name="autoMappingBehavior" value="PARTIAL"/>
        <setting name="defaultExecutorType" value="SIMPLE"/>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <setting name="localCacheScope" value="SESSION"/>
        <setting name="jdbcTypeForNull" value="NULL"/>
    </settings>
    <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>
路径在application.properties配置

4 、实体类:

package com.testxml.domain;

public class Girl {
    private Integer id;
    private Integer age;
    private String cup_size;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getCup_size() {
        return cup_size;
    }

    public void setCup_size(String cup_size) {
        this.cup_size = cup_size;
    }

    @Override
    public String toString() {
        return "Girl{" +
                "id=" + id +
                ", age=" + age +
                ", cup_size='" + cup_size + '\'' +
                '}';
    }
}

5、mapper接口：

package com.testxml.dao;

import com.testxml.domain.Girl;

import java.util.List;

public interface GirlMapper {

    List<Girl> findAll();
}

xml文件:

<?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.testxml.dao.GirlMapper">
    <select id="findAll" resultType="com.testxml.domain.Girl">
        select * from girl
    </select>
</mapper>

6、service和实现类:

public interface GirlService {

     List<Girl> findAll();
}

@Service
public class GirlServiceImpl implements GirlService {

    @Autowired
    private GirlMapper girlMapper;
    @Override
    public List<Girl> findAll() {
        return girlMapper.findAll();
    }
}

7、controller:

@RestController
public class GirlController {

    @Autowired
    private GirlService girlService;
    @RequestMapping(value = "/girl",method = RequestMethod.GET)
    public void girl(){
        List<Girl> girlList =  girlService.findAll();
        for (Girl girl:girlList){
            System.out.println(girl.toString());
        }

    }

8、启动类配置扫描注解：

@SpringBootApplication
@MapperScan("com.testxml.dao")
public class TestxmlApplication {

    public static void main(String[] args) {
        SpringApplication.run(TestxmlApplication.class, args);
    }
}

9、启动服务，访问路径：http://localhost:8080/girl

项目目录结构: