Springboot整合mybatis
1.在pom中加入所需要的依赖：
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
2.在application.yml中配置数据源和mybatis的相关信息
#数据源
spring:
datasource:
url: jdbc:mysql://localhost:3306/cfcc_pt
username: root
password: root
driver-class-name: com.mysql.jdbc.Driver
#mybatis
mybatis:
typeAliasesPackage: com.cfcc.pojo
mapperLocations: classpath:mybatis/*.xml
3.在启动类的上面加上mapper扫描器，扫描所引用的包。
@SpringBootApplication
@RestController
@MapperScan("com.cfcc.mapper")
public class CfccApplicaton {
public static void main(String[] args) {
SpringApplication.run(CfccApplicaton.class, args);
}
}
4.在数据库中新建一张user表
CREATE TABLE `cf_user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) NOT NULL,
`age` int(11) DEFAULT NULL,
`addr` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;
5.新建一个与用户对应的实体类
package com.cfcc.pojo;
public class CfUser {
private int id;
private String name;
private int age;
private String addr;
public int getId() {
return id;
}
public void setId(int 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;
}
public String getAddr() {
return addr;
}
public void setAddr(String addr) {
this.addr = addr;
}
}
6.在resources下新建mybatis目录并在下面新建一个userMapper.xml。
在xml编写一些简单的针对用户的增删改查的方法。
<?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.cfcc.mapper.UserMapper" >
<select id="findUserById" parameterType="int" resultType="cfUser">
SELECT * from cf_user where id=#{id}
</select>
<select id="findUserListByName" resultType="cfUser">
SELECT * from cf_user
</select>
<!-- 插入并返回自增主键 -->
<insert id="insertUser" parameterType="cfUser" useGeneratedKeys="true" keyProperty="id">
insert INTO cf_user(name, age, addr) VALUES (#{name},#{age},#{addr})
</insert>
<update id="updateUser" parameterType="cfUser">
UPDATE cf_user set name=#{name},age=#{age},addr=#{addr}
where id=#{id}
</update>
<delete id="deleteUserById" parameterType="int">
delete from cf_user where id=#{id}
</delete>
</mapper>
7.新建UserMapper接口，并编写对应的方法。
package com.cfcc.mapper;
import com.cfcc.pojo.CfUser;
import java.util.List;
public interface UserMapper {
CfUser findUserById(int id);
List<CfUser> findUserListByName();
void insertUser(CfUser cfUser);
void updateUser(CfUser cfUser);
void deleteUserById(int id);
}
8.在controller中编写方法调用mapper，使用简单的restful风格的url。
package com.cfcc.controller;
import com.cfcc.mapper.UserMapper;
import com.cfcc.pojo.CfUser;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
@RequestMapping("/rest")
public class UserRestController {
@Autowired
private UserMapper mapper;
@RequestMapping(value = "/", method = RequestMethod.GET)
public List<CfUser> getUserList(){
List<CfUser> list = mapper.findUserListByName();
return list;
}
@RequestMapping(value = "/{id}", method = RequestMethod.GET)
public CfUser getUserById(@PathVariable int id){
CfUser user = mapper.findUserById(id);
return user;
}
@RequestMapping(value = "/", method = RequestMethod.POST)
public CfUser postUser(){
CfUser user = new CfUser();
user.setName("张三");
user.setAge(23);
user.setAddr("北京");
mapper.insertUser(user);
return user;
}
@RequestMapping(value = "/{id}", method = RequestMethod.PUT)
public String putUser(@PathVariable int id){
CfUser user = new CfUser();
user.setName("王五");
user.setAge(24);
user.setAddr("广州");
user.setId(id);
mapper.updateUser(user);
return "put success";
}
@RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
public String deleteUser(@PathVariable int id){
mapper.deleteUserById(id);
return "delete success";
}
}
启动工程，即可在浏览器中访问对应的url。
