本文以简单示例展示spring boot与mybatis的整合过程:
(一)示例的目录结构
1、pom.xml
<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.oschina</groupId> <artifactId>spring-mybatis</artifactId> <version>0.0.1-SNAPSHOT</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.10.RELEASE</version> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- 添加Mysql和mybatis--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.0.29</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
2、application.properties
server.port=8089 server.context-path=/person spring.datasource.url=jdbc\:mysql\://127.0.0.1\:3306/test spring.datasource.username=root spring.datasource.password=root spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.type=com.alibaba.druid.pool.DruidDataSource # \u521D\u59CB\u5316\u5927\u5C0F\uFF0C\u6700\u5C0F\uFF0C\u6700\u5927 spring.datasource.initialSize=5 spring.datasource.minIdle=5 spring.datasource.maxActive=20 # \u914D\u7F6E\u83B7\u53D6\u8FDE\u63A5\u7B49\u5F85\u8D85\u65F6\u7684\u65F6\u95F4 spring.datasource.maxWait=60000 mybatis.mapper-locations=classpath*:mapper/*.xml mybatis.type-aliases-package=com.oschina.entity
3、启动类
package com.oschina; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
4、controller层
package com.oschina.controller; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.DeleteMapping; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.PutMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import com.oschina.entity.Person; import com.oschina.server.IPersonService; @RestController public class PersonController { @Autowired private IPersonService personService; @GetMapping("/one/{id}") public Person findOne(@PathVariable("id") Integer id) { return personService.findPersonById(id); } @GetMapping("/many") public List<Person> findAll() { return personService.findAll(); } @PostMapping("/insert") public void insert(@RequestParam("name") String name, @RequestParam("age") Integer age) { personService.insertPerson(name, age); } @PutMapping("/update/{id}") public void update(@PathVariable("id") Integer id, @RequestParam("name") String name, @RequestParam("age") Integer age) { personService.updatePerson(id, name, age); } @DeleteMapping("/delete/{id}") public void delete(@PathVariable("id") Integer id) { personService.deletePerson(id); } }
5、service层
package com.oschina.server; import java.util.List; import com.oschina.entity.Person; public interface IPersonService { Person findPersonById(Integer id); List<Person> findAll(); void insertPerson(String name, Integer age); void updatePerson(Integer id, String name, Integer age); void deletePerson(Integer id); }
package com.oschina.server; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.oschina.entity.Person; import com.oschina.mapper.PersonMapper; @Service public class PersonService implements IPersonService { @Autowired private PersonMapper personMapper; @Override public Person findPersonById(Integer id) { return personMapper.findPersonById(id); } @Override public List<Person> findAll() { return personMapper.findAll(); } @Override public void insertPerson(String name, Integer age) { personMapper.insertPerson(name, age); } @Override public void updatePerson(Integer id, String name, Integer age) { personMapper.updatePerson(id, name, age); } @Override public void deletePerson(Integer id) { personMapper.deletePerson(id); } }
6、mapper层
package com.oschina.mapper; import java.util.List; import org.apache.ibatis.annotations.Mapper; import org.apache.ibatis.annotations.Param; import com.oschina.entity.Person; @Mapper public interface PersonMapper { Person findPersonById(@Param("id") Integer id); List<Person> findAll(); void insertPerson(@Param("name") String name, @Param("age") Integer age); void updatePerson(@Param("id") Integer id, @Param("name") String name, @Param("age") Integer age); void deletePerson(@Param("id") Integer id); }
7、实体类
package com.oschina.entity; import java.io.Serializable; public class Person implements Serializable { private static final long serialVersionUID = 1L; private Integer id; private String name; private int age; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String toString() { return "Person [id=" + id + ", name=" + name + ", age=" + age + "]"; } }
8、mybatis xml的映射文件
<?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.oschina.mapper.PersonMapper"> <select id="findPersonById" resultType="com.oschina.entity.Person"> select id AS id, name AS name, age AS age from tbl_person where id=#{id} limit 1 </select> <select id="findAll" resultType="com.oschina.entity.Person"> select id AS id, name AS name, age AS age from tbl_person </select> <insert id="insertPerson"> insert into tbl_person(name,age) values(#{name},#{age}) </insert> <update id="updatePerson"> update tbl_person <set> name=#{name}, age=#{age} </set> where id=#{id} </update> <delete id="deletePerson"> delete from tbl_person where id=#{id} </delete> </mapper>