【Spring Boot】010

【Spring Boot】010

最新更新：2020年9月22日08:19:8

一、简单环境搭建

1、新建项目

第一步：创建spring boot项目，填写相关配置信息

第二步：导入相关包

2、导入Maven依赖

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<!-- .mybatis.spring.boot/mybatis-spring-boot-starter -->
<dependency>
    <groupId>spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.1.</version>
</dependency>

、在配置文件application.properties中配置数据库

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spring.datasource.username=root
spring.datasource.password=zibo1529417242
spring.datasource.url=jdbc:mysql://localhost:06/zibo?serverTimezone=UTC
spring.datasource.driver-class-name=jdbc.Driver

4、修改测试类简单测试是否能够成功获取数据源和连接

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package com.zibo;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.SpringBootTest;

import javax.sql.DataSource;
import java.sql.SQLException;

@SpringBootTest
class StudySpringDataForMybatisApplicationTests {

    @Autowired
    DataSource dataSource;

    @Test
    void contextLoads() throws SQLException {
        println("getClass：" + dataSource.getClass());
        println("getConnection：" + dataSource.getConnection());
    }

}

5、测试结果

二、使用演示

第一步：导入lombok坐标

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        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

第二步：新建Account类

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package com.zibo.pojo;

import lombok.AllArgsCtructor;
import lombok.Data;
import ;

@Data
@oArgsCtructor
@AllArgsCtructor
public class Account {
    private Integer id;
    private String name;
    private Double money;
}

第三步：新建AccountMapper接口

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package com.;

import com.zibo.pojo.Account;
import org.apache.ibatis.annotati.Mapper;
import org.springframework.stereotype.Repository;

import java.util.List;

//这个注解表示这是一个mybatis的mapper类
@Mapper
@Repository
public interface AccountMapper{

    List<Account> findAll();

    Account findById(int id);

    int addAccount(Account account);

    int updateAccount(Account account);

    int deleteAccount(int id);


}

第四步：新建AccountMapper.xml文件

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<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis//DTD Mapper .0//E"
        ".dtd">
<mapper namespace="com..AccountMapper">
    <!--查询所有-->
    <!--这个地方用account需要在配置文件中设置别名，具体见配置文件-->
    <select id="findAll" resultType="Account">
        select * from account;
    </select>
<!--    通过id查询-->
    <select id="findById" parameterType="int" resultType="Account">
        select * from account where id = #{id}；
    </select>
<!--    添加账户-->
    <insert id="addAccount" parameterType="Account">
        insert into account (id, name, money) VALUES (#{id},#{name},#{money});
    </insert>
<!--    更新账户-->
    <update id="updateAccount" parameterType="Account">
        update account set name = #{name},money = #{money} where id = #{id};
    </update>
<!--    删除账户-->
    <delete id="deleteAccount" parameterType="int">
        delete from account WHERE id = #{id};
    </delete>
</mapper>

第五步：修改配置文件application.properties

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spring.datasource.username=root
spring.datasource.password=zibo1529417242
spring.datasource.url=jdbc:mysql://localhost:06/zibo?serverTimezone=UTC
spring.datasource.driver-class-name=jdbc.Driver

# 整合mybatis
=com.zibo.pojo
=classpath:mybatis/mapper/*.xml

第六步：新建AccountService接口

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package com.zibo.service;

import com.zibo.pojo.Account;

import java.util.List;

public interface AccountService {
    List<Account> findAll();

    Account findById(int id);

    int addAccount(Account account);

    int updateAccount(Account account);

    int deleteAccount(int id);
}

第七步：新建AccountMapper接口实现类

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package com.zibo.service;

import com..AccountMapper;
import com.zibo.pojo.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class AccountServiceImpl implements AccountService {

    @Autowired
    AccountMapper accountMapper;

    @Override
    public List<Account> findAll() {
        return accountMapper.findAll();
    }

    @Override
    public Account findById(int id) {
        return accountMapper.findById(id);
    }

    @Override
    public int addAccount(Account account) {
        return accountMapper.addAccount(account);
    }

    @Override
    public int updateAccount(Account account) {
        return accountMapper.updateAccount(account);
    }

    @Override
    public int deleteAccount(int id) {
        return accountMapper.deleteAccount(id);
    }
}

第八步：新建AccountController类

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package com.;

import com.zibo.pojo.Account;
import com.zibo.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class AccountController {

    @Autowired
    AccountService accountService;

    @GetMapping("/findAll")
    public List<Account> findAll(){
        return accountService.findAll();
    }

}

第九步：StudySpringDataForMybatisApplication启动类代码（看注释）

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package com.zibo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
//@MapperScan("com.")//扫描mapper
public class StudySpringDataForMybatisApplication {

    public static void main(String[] args) {
        SpringApplication.run(, args);
    }

}

第十步：运行测试

文件位置图：

备注：就测试一个方法吧；

pom.xml内容：

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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns=".0.0" xmlns:xsi=";
         xsi:schemaLocation=".0.0 .0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2...RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.zibo</groupId>
    <artifactId>study_spring_data_for_mybatis</artifactId>
    <version>0.0.1-SAPSHOT</version>
    <name>StudySpringDataForMybatis</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <!-- .mybatis.spring.boot/mybatis-spring-boot-starter -->
        <dependency>
            <groupId>spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusi>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusi>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

三、源代码

链接： 提取码：zibo

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