SpringBoot+Mybatis简单的增删改查（注解实现）
工程创建选的是maven项目，目录结构如下
##pom.xml的依赖配置
<!-- 指定maven仓库 -->
<repositories><!-- 发现依赖和扩展的远程资源库 -->
<!-- maven自己官方仓库 -->
<repository>
<id>maven</id>
<name>Maven Repository Switchboard</name>
<layout>default</layout>
<url>http://repo1.maven.org/maven2</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<!-- 阿里巴巴发布版本仓库 -->
<repository>
<id>alibaba-opensource</id>
<name>alibaba-opensource</name>
<url>http://code.alibabatech.com/mvn/releases/</url>
<layout>default</layout>
</repository>
<!-- 阿里巴巴快照版本仓库 -->
<repository>
<id>alibaba-opensource-snapshot</id>
<name>alibaba-opensource-snapshot</name>
<url>http://code.alibabatech.com/mvn/snapshots/</url>
<layout>default</layout>
</repository>
</repositories>
<!-- 继承父包 -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<!-- spring-boot的web启动的jar包 -->
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 打成war包需要的配置-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<!-- 热启动-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- mysql数据库驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>
<!--thymeleaf模板jar，是很不错的html数据传递取值，类似jsp的jstl-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<!--jpa的jar包 ，操作数据库的，类似hibernate -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.0.1</version>
</dependency>
<!--mybatis-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.0.1</version>
</dependency>
</dependencies>
</dependencies>
配置数据库数据源
在resource目录下新建application.properties文件里配置
#数据库数据源
spring.datasource.url=jdbc:mysql://localhost:3306/springboot?useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=666002
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
mybatis.mapper-locations=classpath:mapper/*Mapper.xml
配置mapper文件
resourcers目录下mapper目录
<?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.project.dao.IUserDao">
<resultMap type="com.project.bean.UserBean" id="user">
<id column="pk_id" property="userId" />
<result column="f_name" property="userName"/>
<result column="f_wd" property="pwd"></result>
</resultMap>
</mapper>
用户实体类
package com.project.bean;
public class UserBean {
private int userId;
private String userName;
private String pwd;
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return pwd;
}
public void setPassword(String password) {
this.pwd = password;
}
}
书写sql语句和IUserDao接口
/**
* 添加
* @param user
*/
@Insert("insert into t_user (f_name,f_pwd) values(#{userName},#{pwd})")
public void addUser(UserBean user);
/**
*
* 查询所有
* @return返回用户集合
*/
@Select("select * from t_user")
@ResultMap("user")
public List<UserBean> findAll();
/**
* 通过用户名和密码实现用户登录
* @param userName
* @param pwd
* @return
*/
@Select("select * from t_user where f_name=#{userName} AND f_pwd=#{pwd}")
@ResultMap("user")
public UserBean login(@Param("userName") String userName, @Param("pwd") String pwd);
/**
* 通过id,修改用户密码
* @param id
* @param newPwd
*/
@Update("update t_user set f_pwd=#{newPwd} where pk_id=#{userId}")
public void updateUser(@Param("userId") int id,@Param("newPwd") String newPwd);
/**
* 通过id，删除用户
* @param id
*/
@Delete("delete from t_user where pk_id=#{userId}")
public void deleteUser(@Param("userId") int id);
设计service接口和书写service实现类
Service接口
package com.project.service;
import com.project.bean.UserBean;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface IUserService {
public void addUser(UserBean user);
public UserBean login(String name, String pwd);
public List<UserBean> findAll();
public void updateUser(int id,String newPwd);
public void deleteUser(int id);
}
实现类
package com.project.service.impl;
import com.project.dao.IUserDao;
import com.project.bean.UserBean;
import com.project.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserServiceImpl implements IUserService {
@Autowired
private IUserDao dao;
@Override
public void addUser(UserBean user) {
dao.addUser(user);
}
@Override
public UserBean login(String name, String pwd) {
return dao.login(name, pwd);
}
@Override
public List<UserBean> findAll() {
return dao.findAll();
}
@Override
public void updateUser(int id, String newPwd) {
dao.updateUser(id, newPwd);
}
@Override
public void deleteUser(int id) {
dao.deleteUser(id);
}
}
配置SpringBootApplication
package com.project;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class MainBoot {
public static void main(String[] args) {
SpringApplication.run(MainBoot.class);
}
}
书写测试类
package com.project.test;
import com.project.MyBaitsMain;
import com.project.bean.UserBean;
import com.project.service.IUserService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.List;
@RunWith(SpringRunner.class)
@SpringBootTest(classes = MyBaitsMain.class)
public class MyTest {
@Autowired
private IUserService service;
@Test
public void loginTest(){
UserBean user=service.login("Sam","777");
System.out.println(user.getUserId());
}
@Test
public void findAllTest(){
List<UserBean> userList=service.findAll();
for (UserBean user:userList){
System.out.println(user.getUserName());
}
}
@Test
public void addUserTest(){
UserBean user=new UserBean();
user.setUserName("Chris");
user.setPassword("111");
service.addUser(user);
}
@Test
public void updateTest(){
service.updateUser(1,"555");
}
@Test
public void deleteTest(){
service.deleteUser(4);
}
}