Spring Boot集成MyBatis: (1)新建maven project;取名为:spring-boot-mybatis (2)在pom.xml文件中引入相关依赖; (3)创建启动类App.java (4)在application.properties添加配置文件; (5)编写Demo测试类; (6)编写DemoMapper; (7)编写DemoService (8)编写DemoController; (9)加入PageHelper (10)获取自增长ID; 在pom.xml文件中引入相关依赖 (1)基本依赖,jdk版本号; (2)mysql驱动,mybatis依赖包,mysql分页PageHelper: <!-- mysql 数据库驱动. --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency>
<!-- spring-boot mybatis依赖: 请不要使用1.0.0版本,因为还不支持拦截器插件, 1.1.1 是博主写帖子时候的版本,大家使用最新版本即可 --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.1.1</version> </dependency> <!-- MyBatis提供了拦截器接口,我们可以实现自己的拦截器, 将其作为一个plugin装入到SqlSessionFactory中。 Github上有位开发者写了一个分页插件,我觉得使用起来还可以,挺方便的。 Github项目地址: https://github.com/pagehelper/Mybatis-PageHelper --> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>4.1.0</version> </dependency>
创建启动类App.java
@SpringBootApplication
@MapperScan("com.kfit.*.mapper")
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
//这里和以往不一样的地方就是MapperScan的注解,这个是会扫描该包下的接口
在application.properties添加配置文件
###datasource
spring.datasource.url = jdbc:mysql://localhost:3306/test
spring.datasource.username = root
spring.datasource.password = root
spring.datasource.driverClassName = com.mysql.jdbc.Driver
spring.datasource.max-active=20
spring.datasource.max-idle=8
spring.datasource.min-idle=8
spring.datasource.initial-size=10
编写Demo测试类 public class Demo { private long id; private String name; //省略getter and setter…. } 编写DemoMapper public interface DemoMappper { @Select("select *from Demo where name = #{name}") public List<Demo> likeName(String name); @Select("select *from Demo where id = #{id}") public Demo getById(long id); @Select("select name from Demo where id = #{id}") public String getNameById(long id); }
编写DemoService @Service public class DemoService { @Autowired private DemoMappper demoMappper; public List<Demo> likeName(String name){ return demoMappper.likeName(name); } } 编写DemoController @RestController public class DemoController { @Autowired private DemoService demoService; @RequestMapping("/likeName") public List<Demo> likeName(String name){ return demoService.likeName(name); } } //运行访问:http://127.0.0.1:8080/likeName?name=张三 就可以看到返回的数据了
加入PageHelper @Configuration public class MyBatisConfiguration { @Bean public PageHelper pageHelper() { System.out.println("MyBatisConfiguration.pageHelper()"); PageHelper pageHelper = new PageHelper(); Properties p = new Properties(); p.setProperty("offsetAsPageNum", "true"); p.setProperty("rowBoundsWithCount", "true"); p.setProperty("reasonable", "true"); pageHelper.setProperties(p); return pageHelper; } }
加入PageHelper @RequestMapping("/likeName") public List<Demo> likeName(String name){ PageHelper.startPage(1,1); return demoService.likeName(name); } 获取自增长ID @Insert("insert into Demo(name,password) values(#{name},#{password})") public long save(Demo name); 获取自增长ID @Options(useGeneratedKeys = true, keyProperty = "id", keyColumn = "id")
端口在使用,是因为之前的eclips应用没有关闭,