springboot integrates mybatis
1, add pom reference
<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.xml mybatis.mapper-locations=classpath:mybatis/mapper/*.xml mybatis.type-aliases-package=com.kerry.model spring.datasource.driverClassName = com.mysql.jdbc.Driver spring.datasource.url = jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8 spring.datasource.username = root spring.datasource.password = 123456
3 in resource Create the mybatis directory under the directory and create the mybatis-config.xml file
<?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>
Create the mapper directory under the mybatis directory to store the mapper class interface file
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 class file
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;
@RestController
public class UserController {
@Autowired
private 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);
}
}
Finally, add the scanning maper interface annotation
@SpringBootApplication
@MapperScan("com.kerry.mapper")
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
or in each It is also possible to add the @mapper annotation to an XXMapper class. You can choose one of the two. It is not necessary to add the @mapper annotation every time you write a mapper class
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