在IDEA中创建SpringBoot标准工程（接上篇）

IDEA安装插件Spring Assistant。

新建项目，选择Spring Assistant

选中如下依赖

自动生成的pom.xml文件内容

<?xml version="1.0" encoding="UTF-8"?>
<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.legion</groupId>
    <artifactId>hellomybatis</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>HelloMybatis</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.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-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </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>
        </dependency>
    </dependencies>

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


</project>

 工程内容和上一篇基本一致：

public class Machine {
    private int id;
    private String mach_no;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getMach_no() {
        return mach_no;
    }
    public void setMach_no(String mach_no) {
        this.mach_no = mach_no;
    }
    
}

package com.legion.pojo;

public class ResultEntity {
    private String status;
    private String data;
    public String getStatus() {
        return status;
    }
    public void setStatus(String status) {
        this.status = status;
    }
    public String getData() {
        return data;
    }
    public void setData(String data) {
        this.data = data;
    }
    
}

@Mapper
public interface MachineMapper {
    public List<Machine> findAll();
    public Machine isMachineIn(String mach_no);
}

/*MachineService.jva*/
public interface MachineService {
    public List<Machine> findAll();
    public Machine findMachine(String no);
}


/*MachineServiceImpl.java*/
@Service
public class MachineServiceImpl implements MachineService {
    
    @Autowired
    private MachineMapper machine;
    @Override
    public List<Machine> findAll() {
        return machine.findAll();
    }
    @Override
    public Machine findMachine(String no) {
        return machine.isMachineIn(no);
    }

}

@RestController
public class UserController {
    @Autowired
    private MachineService ms;
    @RequestMapping("/all")
    public List<Machine> findAll(){
        return ms.findAll();
    }
    
    @RequestMapping("/hello")
    public String show() {
        return "hello,world";
    }
    /**
     * 
     * @param machine
     * @return
     */
    @RequestMapping(value="/testMachine",method=RequestMethod.GET)
    public ResultEntity test(@RequestParam(required=true) String machine,@RequestParam(required=true) String pass) {
        Machine m=ms.findMachine(machine);
        ResultEntity re=new ResultEntity();
        if(!pass.equals("hello")) {
            re.setStatus("no_pass");
            re.setData("wrong");
            return re;
        }
        if(m!=null) {
            re.setStatus("bad");
            re.setData("already exists");
        }else {
            re.setStatus("ok");
            re.setData("good to add one here");
        }
        return re;
    }
    
}

和对应Eclipse工程不一样的地方

第一点

原来mapper接口文件和xml放在同一个包中。

这里在project视图中，在resource目录下新建mapper目录（注意新建的是directory），所有xml文件放到该目录下。

然后在application.properties文件配置mapper的路径

mybatis.mapper-locations=classpath:mapper/*xml
spring.datasource.url=jdbc:mysql://localhost:3306/demo?serverTimezone=GMT%2B8
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=123456

第二点

spriingboot2使用的mysql-connector-java

是最新版8，所以驱动类名称由com.mysql.jdbc.Driver改成com.mysql.cj.jdbc.Driver，数据库名称后面需要接时区。