springboot mybatis
1. 工程搭建
依据第一章节的样例工程，进行更改。
1.1 pom修改
需要引入：
- mysql jdbc 驱动包
- mybatis-spring-boot-starter（整合MyBatis的核心依赖）
详细内容如下：
<!-- mybatis & db -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.1.1</version>
</dependency>
1.2 application.properties 修改
- 增加数据库连接
- mybatis mapper文件扫描位置
#jdbc config
spring.datasource.url=jdbc:mysql://192.168.137.101:3306/spring-boot-demo?characterEncoding=utf-8&autoReconnect=true
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.max-active=5
spring.datasource.max-idle=3
spring.datasource.test-on-borrow=true
spring.datasource.test-while-idle=true
spring.datasource.validation-query=SELECT 1;
#mybatis config
mybatis.mapperLocations = classpath:mapper/*.xml
mybatis.typeAliasesPackage = pers.mateng.demo.springboot
2. 业务编码
2.1 创建pojo
package pers.mateng.demo.springboot.domain;
public class User {
private Long id;
private String name;
private Integer age;
get/set ...
}
package pers.mateng.demo.springboot.dto;
public class UserCondition {
/**用户名*/
private String name;
/**根据年龄范围查询用户，范围的最小值*/
private Integer minAge;
/**根据年龄范围查询用户，范围的最大值*/
private Integer maxAge;
/**分页条件，起始位置*/
private Integer startPosition;
/**分页条件，查询的最大条数*/
private Integer maxResult;
}
2.2 创建DAO
interface
@Mapper
public interface UserDao {
public int add(User user);
public int delete(Long id);
public User getById(Long id);
public List<User> getList(UserCondition condition);
public Long getCount(UserCondition condition);
}
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" >
<?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="pers.mateng.demo.springboot.dao.UserDao" >
<resultMap id="user" type="pers.mateng.demo.springboot.domain.User">
<id column="u_id" property="id" />
<result column="u_name" property="name" />
<result column="u_age" property="age" />
</resultMap>
<select id="getById" resultMap="user">
select * from tb_user where u_id = #{id}
</select>
<select id="getList" resultMap="user" parameterType="pers.mateng.demo.springboot.dto.UserCondition">
select * from tb_user
<include refid="where"></include>
limit #{startPosition}, #{maxResult}
</select>
<select id="getCount" parameterType="pers.mateng.demo.springboot.dto.UserCondition" resultType="Long">
select count(1) from tb_user
<include refid="where"></include>
</select>
<sql id="where">
<where>
<if test="name != null and name.length() > 0">
and u_name LIKE CONCAT('%', #{name}, '%')
</if>
<if test="minAge != null">
and u_age <![CDATA[ >= ]]> #{minAge}
</if>
<if test="maxAge != null">
and u_age <![CDATA[ <= ]]> #{maxAge}
</if>
</where>
</sql>
<insert id="add" parameterType="pers.mateng.demo.springboot.domain.User">
insert into tb_user(u_name, u_age) values(#{name,jdbcType=VARCHAR}, #{age,jdbcType=TINYINT})
</insert>
<delete id="delete">
delete from tb_user where u_id = #{id}
</delete>
</mapper>
2.3 controller
/**
* 用户管理的controller
* @author mateng
*/
@RestController
@RequestMapping(path="user")
public class UserController {
@Autowired
private UserDao userDao;
@RequestMapping(method=RequestMethod.GET)
public Map<String, Object> page(@ModelAttribute UserCondition condition) {
Map<String, Object> result = new HashMap<String, Object>();
result.put("total", userDao.getCount(condition));
result.put("rows", userDao.getList(condition));
return result;
}
@RequestMapping(method=RequestMethod.POST)
public int add(@ModelAttribute User user) {
return userDao.add(user);
}
@RequestMapping(path="/{id}", method=RequestMethod.GET)
public User findById(@PathVariable Long id) {
return userDao.getById(id);
}
@RequestMapping(path="/{id}", method=RequestMethod.DELETE)
public int delete(@PathVariable Long id) {
return userDao.delete(id);
}
}
3. 验证
启动工程，使用如下命令测试增加、查询接口。注意：下面连接中的ip地址（当前开发机器的ip地址）
1、增加：
curl -X POST --header 'Content-Type: application/x-www-form-urlencoded' -d "name=zhansan&age=30" 'http://192.168.50.7:8888/user'
2、查询：
分页查询
curl -X GET 'http://192.168.50.7:8888/user'
根据id查询
curl -X GET 'http://192.168.50.7:8888/user/1'
