1.新建maven项目
先新建一个maven项目，勾选上creat a simple project，填写groupid，artifactid
2.建立项目结构
3.添加依赖
<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</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<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>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
4.代码编写
在包的最外层添加启动类
package com.lee.test;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;
@SpringBootApplication
@EnableCaching
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
实体类
package com.lee.test.pojo;
import org.springframework.stereotype.Component;
@Component
public class User {
private int id;
private String name;
private String telephone;
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 String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}
}
mapper接口
package com.lee.test.mapper;
import java.util.List;
import org.apache.ibatis.annotations.Mapper;
import com.lee.test.pojo.User;
@Mapper
public interface UserMapper {
List<User> getUser(int id);
}
service接口
package com.lee.test.service;
import java.util.List;
import com.lee.test.pojo.User;
public interface UserService {
public List<User> getUser(int id);
}
service接口实现
package com.lee.test.service;
import java.util.List;
import com.lee.test.pojo.User;
public interface UserService {
public List<User> getUser(int id);
}
controller层
package com.lee.test.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.lee.test.pojo.User;
import com.lee.test.service.UserService;
@RestController
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/getUser")
public List<User> getUser(@RequestParam("id") int id) {
return userService.getUser(id);
}
}
还有mapper.xml的实现
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://www.mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.lee.test.mapper.UserMapper">
<select id="getUser" parameterType="java.lang.Integer" resultType="com.lee.test.pojo.User">
select * from t_user where id = #{id}
</select>
</mapper>
最后是一些配置在application.properties中
spring.datasource.driverClassName=com.mysql.jdbc.Driver spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8 spring.datasource.username=root spring.datasource.password=root mybatis.mapper-locations: classpath:mapper/*.xml
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持亿速云。
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