springboot集成mybatis xml方式

springboot集成mybatis

关键代码如下：

1，添加pom引用

<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>

2 application.properties

mybatis.config-locations=classpath:mybatis/mybatis-config.xmlmybatis.mapper-locations=classpath:mybatis/mapper/*.xmlmybatis.type-aliases-package=com.kerry.modelspring.datasource.driverClassName = com.mysql.jdbc.Driverspring.datasource.url = jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8spring.datasource.username = rootspring.datasource.password = 123456

3 在resource目录下创建mybatis目录并创建mybatis-config.xml文件

<?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>

mybatis目录下创建mapper目录存放mapper类接口文件

package com.kerry.mapper;import java.util.List;import com.kerry.model.User;public interface UserMapper {List<User> getAll();User getOne(Integer id);void insert(User user);void update(User user);void delete(Integer id);}

model类文件

package com.kerry.mapper;import java.util.List;import com.kerry.model.User;public interface UserMapper {List<User> getAll();User getOne(Integer id);void insert(User user);void update(User user);void delete(Integer id);}

userMapper.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.kerry.mapper.UserMapper" >    <resultMap id="BaseResultMap" type="com.kerry.model.User" >        <id column="id" property="id" jdbcType="INTEGER" />        <result column="name" property="name" jdbcType="VARCHAR" />        <result column="age" property="age" jdbcType="VARCHAR" />        <result column="address" property="address" jdbcType="VARCHAR"/>    </resultMap>        <sql id="Base_Column_List" >        id, name, age, address    </sql>    <select id="getAll" resultMap="BaseResultMap"  >       SELECT        <include refid="Base_Column_List" />   FROM user    </select>    <select id="getOne" parameterType="java.lang.Integer" resultMap="BaseResultMap" >        SELECT        <include refid="Base_Column_List" />   FROM user   WHERE id = #{id}    </select>    <insert id="insert" parameterType="com.kerry.model.User" >       INSERT INTO        user       (id,name,age,address)        VALUES       (#{id},#{name}, #{age}, #{address})    </insert>        <update id="update" parameterType="com.kerry.model.User" >       UPDATE        user        SET        <if test="name != null">name = #{name},</if>       <if test="age != null">age = #{age},</if>       address = #{address}       WHERE        id = #{id}    </update>        <delete id="delete" parameterType="java.lang.Integer" >       DELETE FROM        user        WHERE         id =#{id}    </delete></mapper>

controller：

package com.kerry.web;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import com.kerry.model.User;import com.kerry.mapper.UserMapper;@RestControllerpublic class UserController {@Autowiredprivate UserMapper userMapper;@RequestMapping("/getUsers")public List<User> getUsers() {List<User> users=userMapper.getAll();return users;}    @RequestMapping("/getUser")    public User getUser(Integer id) {    User user=userMapper.getOne(id);        return user;    }        @RequestMapping("/add")    public void save(User user) {    userMapper.insert(user);    }        @RequestMapping(value="update")    public void update(User user) {    userMapper.update(user);    }        @RequestMapping(value="/delete/{id}")    public void delete(@PathVariable("id") Integer id) {    userMapper.delete(id);    }        }

最后在启动类上加上 扫描maper interface注解

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

或者在每个XXMapper类上加上@mapper注解也行  二选一即可

比如

package com.kerry.mapper;import java.util.List;import org.apache.ibatis.annotations.Mapper;import com.kerry.model.User;@Mapperpublic interface UserMapper {List<User> getAll();User getOne(Integer id);void insert(User user);void update(User user);void delete(Integer id);}

个人建议使用直接在启动类上application上@MapperScan方便，一次搞定，不必每写一个mapper类都加上@mapper注解

附上项目结构目录 选中的类以及文件