使用idea搭建简单的springboot+mybatis项目
使用的工具：idea,maven
使用的技术：springboot mybatis spring
一、项目的创建
1. 创建项目
填写Group和Artifact
添加需要的依赖
然后next ;第一次创建会比较慢。可以添加archecatolog=internal
2.然后创建相应的文件夹。比如Java，resources.在idea右键可以make directory as.
然后在创建controller,service,model,mapper,dao等
二、配置文件相关
3.pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.springboot.study</groupId>
<artifactId>springboot_frame</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springboot_frame</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.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-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.8</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<!-- 默认不会加载src/main/java里面的xml文件 -->
<include>**/*.xml</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>*.properties</include>
<include>static/*.*</include>
<include>templates/*.*</include>
</includes>
</resource>
</resources>
</build>
</project>4.application.properties
#数据库的配置
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://XXXX/XXXXX?useUnicode=true&characterEncoding=utf8
spring.datasource.username=XXX
spring.datasource.password=XXX
#mybatis配置
mybatis.type-aliases-package=com.springboot.study.model
mybatis.mapper-locations=com/springboot/study/mapper/*.xml三、各层代码
5.User
这里用到了lombok
@Data
public class User {
private long id;
private String username;
private String password;
private String usersex;
private String nickname;
}
6.UserDao
这里需要加上@Mapper注解
@Mapper
public interface UserDao {
List<User> getAll();
User getOne(long id);
void insert(User user);
void update(User user);
void delete(long id);
}7.UserMapper.xml
这里可以根据自己的需求，合理的使用mybatis的知识，动态sql的知识
<?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.springboot.study.dao.UserDao">
<resultMap id="BaseResultMap" type="com.springboot.study.model.User">
<id property="id" column="id" jdbcType="BIGINT"/>
<result property="username" column="username" jdbcType="VARCHAR"/>
<result property="password" column="password" jdbcType="VARCHAR"/>
<result property="usersex" column="user_sex" jdbcType="VARCHAR"/>
<result property="nickname" column="nick_name" jdbcType="VARCHAR"/>
</resultMap>
<sql id="Base_column_list">
id,username,password,user_sex,nick_name
</sql>
<select id="getAll" resultMap="BaseResultMap">
SELECT
<include refid="Base_column_list"/>
FROM USER
</select>
<select id="getOne" resultMap="BaseResultMap">
SELECT user_sex
<include refid="Base_column_list"/>
FROM USER WHERE id = #{id}
</select>
<insert id="insert" parameterType="com.springboot.study.model.User">
INSERT into
USER
(username,password,user_sex)
VALUES
(#{username},#{password},#{usersex})
</insert>
<delete id="delete" parameterType="java.lang.Long">
DELETE FROM USER WHERE id =#{id}
</delete>
<update id="update" parameterType="com.springboot.study.model.User">
update USER
<set> <if test="username != null">username = #{username},</if>
<if test="usersex != null">user_sex = #{usersex},</if>
nick_name = #{nickname}
</set>
WHERE id = #{id}
</update>
</mapper>到此springboot 结合mybatis的配置就完了。springboot的确帮我们简化了很多。
四、测试
8.test
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringbootFrameApplicationTests {
@Autowired
private UserDao userDao;
@Test
public void contextLoads() {
}
@Test
public void getOne() throws Exception {
System.out.println("getOne test!!");
User user= userDao.getOne(1);
System.out.println(user.getPassword());
}
@Test
public void update() throws Exception {
System.out.println("update test!!");
User user = new User();
user.setPassword("1111");
user.setNickname("111");
user.setUsersex("2");
userDao.update(user);
System.out.println(user.getPassword());
}
}