现在有一个department表,字段为id，name，现在开始整合的一些准备工作
1.创建一个springboot项目
2.必备的maven依赖代码：
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.10</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
3.在全局的application.yml文件中配置以下代码：
spring:
datasource:
driver-class-name: com.mysql.jdbc.Driver
username: root
password: root
url: jdbc:mysql://192.168.25.144:3306/test?characterEncoding=utf-8
type: com.alibaba.druid.pool.DruidDataSource
initialSize: 5
minIdle: 5
maxActive: 20
maxWait: 60000
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
poolPreparedStatements: true
# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
# 不注释回报错，目前没有去找原因
# filters: stat,wall,log4j
maxPoolPreparedStatementPerConnectionSize: 20
useGlobalDataSourceStat: true
connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
4.由于上面的部分配置需要使用自定义配置类才能生效，所以需要创建一个自定义配置类
代码：
/**
* 数据源配置类
*/
@Configuration
public class DruidConfig {
@ConfigurationProperties(prefix = "spring.datasource")
@Bean
public DataSource dataSource() {
return new DruidDataSource();
}
/**
* 配置Druid的监控
* 1、配置一个管理后台的Servlet
* @return
*/
@Bean
public ServletRegistrationBean statViewServlet(){
ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
Map<String,String> initParams = new HashMap<>();
initParams.put("loginUsername","admin");
initParams.put("loginPassword","123456");
//默认就是允许所有访问
initParams.put("allow","");
initParams.put("deny","192.168.105.105");
bean.setInitParameters(initParams);
return bean;
}
/**
* 2.配置一个web监控的filter
* @return
*/
@Bean
public FilterRegistrationBean webStatFilter(){
FilterRegistrationBean bean = new FilterRegistrationBean();
bean.setFilter(new WebStatFilter());
Map<String,String> initParams = new HashMap<>(10);
initParams.put("exclusions","*.js,*.css,/druid/*");
bean.setInitParameters(initParams);
bean.setUrlPatterns(Arrays.asList("/*"));
return bean;
}
}
5.创建一个DepartmentPojo类，写上id和name属性，加上getset方法
6.需要在启动类加上一个扫描注解，value的值是要扫描的mapper类的包
代码：
@MapperScan(value = "com.adu.mybatis.springboot.mapper")
@SpringBootApplication
public class SpringbootMybatisApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootMybatisApplication.class, args);
}
}
1.创建一个DepartmentMapper类，写上添加和删除的方法,并且加上注解.
代码：
@Select("select * from department where id=#{id}")
DepartmentPojo getById01(Integer id);
/**
* 使用驼峰命名法,keyProperty返回主键
* @param dept
*/
@Options(useGeneratedKeys = true,keyProperty = "id")
@Insert("insert into department(name) values(#{name})")
void insertDept01(DepartmentPojo dept);
2.创建一个DepartmentController调用以上2个方法
代码：
@RestController
public class DepartmentController {
@Autowired
private DepartmentMapper departmentMapper;
@GetMapping("/dept/{id}")
public DepartmentPojo getById01(@PathVariable("id") Integer id) {
DepartmentPojo byId01 = departmentMapper.getById01(id);
return byId01;
}
@PostMapping("/dept")
public DepartmentPojo insertDept01(DepartmentPojo departmentPojo) {
departmentMapper.insertDept01(departmentPojo);
return departmentPojo;
}
}
3.启动之后调用
根据id查询方法链接：http://localhost:8080/dept/1
添加方法使用的是post方式调用，所以我使用的是Postman这个软件模仿post提交方式
链接调用：http://localhost:8080/dept
1.直接在刚刚创建的DepartmentMapper类中添加2个无注解的方法
代码：
//根据id查询
DepartmentPojo getById02(Integer id);
//添加部门
void insertDept02(DepartmentPojo dept);
2.创建一个mybatis的全局配置文件mybatis-config.xml,路径为类路径下
代码如下：
<?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>
</configuration>
3.创建一个mapper配置文件dept.xml，路径为类路径下的mybatis文件夹下
代码如下；
<?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.adu.mybatis.springboot.mapper.DepartmentMapper">
<select id="getById02" parameterType="int" resultType="com.adu.mybatis.springboot.pojo.DepartmentPojo">
select * from department where id=#{id}
</select>
<insert id="insertDept02" parameterType="com.adu.mybatis.springboot.pojo.DepartmentPojo">
<selectKey keyProperty="id" resultType="int" order="AFTER">
select LAST_INSERT_ID();
</selectKey>
insert into department(name) values(#{name})
</insert>
</mapper>
4.在全局的application.yml文件中加上以下代码：
mybatis:
# 指定全局配置文件位置
config-location: classpath:mybatis/mybatis-config.xml
# 指定sql映射文件位置
mapper-locations: classpath:mybatis/mapper/*.xml
5.启动之后调用
根据id查询方法链接：http://localhost:8080/dept2/1
添加方法使用的是post方式调用，所以我使用的是Postman这个软件模仿post提交方式
链接调用：http://localhost:8080/dept2