java通過實體類生成數據庫表並生成註釋

方式一使用A.C.Table

A.C.Table是對Mybatis做的增強功能，實現了mybatis自動建表的能力

官方地址:https://gitee.com/sunchenbin/mybatis-enhance

文檔地址:https://www.yuque.com/sunchenbin/actable/ag3y1y

項目結構

pom文件

<dependencies>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.2.0</version>
</dependency>

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

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>

<dependency>
<groupId>com.gitee.sunchenbin.mybatis.actable</groupId>
<artifactId>mybatis-enhance-actable</artifactId>
<version>1.5.0.RELEASE</version>
</dependency>

<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.21</version>
</dependency>

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.13</version>
</dependency>
</dependencies>

<dependencies>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.2.0</version>
        </dependency>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!--創建表的插件-->
        <dependency>
            <groupId>com.gitee.sunchenbin.mybatis.actable</groupId>
            <artifactId>mybatis-enhance-actable</artifactId>
            <version>1.5.0.RELEASE</version>
        </dependency>

        <!--druid數據源-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.21</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.13</version>
        </dependency>
    </dependencies>

配置類

package com.example.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.beans.factory.config.PropertiesFactoryBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

@Configuration
@ComponentScan(basePackages = {"com.gitee.sunchenbin.mybatis.actable.manager.*"})
public class DataSourceConfig {

@Value("${spring.datasource.driver-class-name}")
private String driver;

@Value("${spring.datasource.url}")
private String url;

@Value("${spring.datasource.username}")
private String username;

@Value("${spring.datasource.password}")
private String password;

@Bean
public PropertiesFactoryBean configProperties() throws Exception{
PropertiesFactoryBean propertiesFactoryBean = new PropertiesFactoryBean();
PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
propertiesFactoryBean.setLocations(resolver.getResources("classpath*:application.yml"));
return propertiesFactoryBean;
}

@Bean
public DruidDataSource dataSource() {
DruidDataSource dataSource = new DruidDataSource();
dataSource.setDriverClassName(driver);
dataSource.setUrl(url);
dataSource.setUsername(username);
dataSource.setPassword(password);
dataSource.setMaxActive(30);
dataSource.setInitialSize(10);
dataSource.setValidationQuery("SELECT 1");
dataSource.setTestOnBorrow(true);
return dataSource;
}

@Bean
public DataSourceTransactionManager dataSourceTransactionManager() {
DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager();
dataSourceTransactionManager.setDataSource(dataSource());
return dataSourceTransactionManager;
}

@Bean
public SqlSessionFactoryBean sqlSessionFactory() throws Exception{
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSource());
PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath*:com/gitee/sunchenbin/mybatis/actable/mapping/*/*.xml"));
sqlSessionFactoryBean.setTypeAliasesPackage("com.example.entity.*");
return sqlSessionFactoryBean;
}
}

DataSourceConfig

package com.example.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.beans.factory.config.PropertiesFactoryBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

@Configuration
@ComponentScan(basePackages = {"com.gitee.sunchenbin.mybatis.actable.manager.*"})
public class DataSourceConfig {

    @Value("${spring.datasource.driver-class-name}")
    private String driver;

    @Value("${spring.datasource.url}")
    private String url;

    @Value("${spring.datasource.username}")
    private String username;

    @Value("${spring.datasource.password}")
    private String password;

    @Bean
    public PropertiesFactoryBean configProperties() throws Exception{
        PropertiesFactoryBean propertiesFactoryBean = new PropertiesFactoryBean();
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        propertiesFactoryBean.setLocations(resolver.getResources("classpath*:application.yml"));
        return propertiesFactoryBean;
    }

    @Bean
    public DruidDataSource dataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName(driver);
        dataSource.setUrl(url);
        dataSource.setUsername(username);
        dataSource.setPassword(password);
        dataSource.setMaxActive(30);
        dataSource.setInitialSize(10);
        dataSource.setValidationQuery("SELECT 1");
        dataSource.setTestOnBorrow(true);
        return dataSource;
    }

    @Bean
    public DataSourceTransactionManager dataSourceTransactionManager() {
        DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager();
        dataSourceTransactionManager.setDataSource(dataSource());
        return dataSourceTransactionManager;
    }

    @Bean
    public SqlSessionFactoryBean sqlSessionFactory() throws Exception{
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource());
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath*:com/gitee/sunchenbin/mybatis/actable/mapping/*/*.xml"));
        sqlSessionFactoryBean.setTypeAliasesPackage("com.example.entity.*");
        return sqlSessionFactoryBean;
    }
}

package com.example.config;

import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@AutoConfigureAfter(DataSourceConfig.class)
public class MyBatisMapperScannerConfig {

@Bean
public MapperScannerConfigurer mapperScannerConfigurer() throws Exception{
MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
mapperScannerConfigurer.setBasePackage("com.example.mapper.*;com.gitee.sunchenbin.mybatis.actable.dao.*");
mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactory");
return mapperScannerConfigurer;
}

}

MyBatisMapperScannerConfig

package com.example.config;

import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@AutoConfigureAfter(DataSourceConfig.class)
public class MyBatisMapperScannerConfig {

    @Bean
    public MapperScannerConfigurer mapperScannerConfigurer() throws Exception{
        MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
        mapperScannerConfigurer.setBasePackage("com.example.mapper.*;com.gitee.sunchenbin.mybatis.actable.dao.*");
        mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactory");
        return mapperScannerConfigurer;
    }

}

實體類

package com.example.entity;

import com.gitee.sunchenbin.mybatis.actable.annotation.Column;
import com.gitee.sunchenbin.mybatis.actable.annotation.IsAutoIncrement;
import com.gitee.sunchenbin.mybatis.actable.annotation.IsKey;
import com.gitee.sunchenbin.mybatis.actable.annotation.Table;
import com.gitee.sunchenbin.mybatis.actable.command.BaseModel;
import com.gitee.sunchenbin.mybatis.actable.constants.MySqlTypeConstant;
import lombok.Data;
import java.util.Date;

@Data
@Table(name = "my_user22",comment = "測試表")//設置表名  註釋
public class User extends BaseModel {

    @IsAutoIncrement   //自增
    @IsKey             //主鍵
    @Column(comment = "用戶ID")//字段註釋
    private Long id;

    @Column(comment = "暱稱",length = 20)
    private String nickName;

    @Column(comment = "頭像",length = 100)
    private String avatar;

    @Column(comment = "用戶名",length = 50)
    private String username;

    @Column(comment = "密碼",length = 200)
    private String password;

    @Column(comment = "郵箱",length = 100)
    private String email;

    @Column(name = "create_time",type = MySqlTypeConstant.DATETIME,comment = "創建時間")
    private Date createTime;

    @Column(name = "update_time",type = MySqlTypeConstant.DATETIME,comment = "修改時間")
    private Date updateTime;
}

配置文件yml

server:
  port: 8082
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/mydemo?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8&useSSL=false
    username: root
    password: password
mybatis:
  table:
    auto: add
    #create        系統啓動後，會將所有的表刪除掉，然後根據model中配置的結構重新建表，該操作會破壞原有數據。
    #update        系統會自動判斷哪些表是新建的，哪些字段要修改類型等，哪些字段要刪除，哪些字段要新增，該操作不會破壞原有數據。
    #none         系統不做任何處理。
    #add        新增表/新增字段/新增索引/新增唯一約束的功能，不做修改和刪除 (只在版本1.0.9.RELEASE及以上支持)。
  model:
    pack: com.example.entity #掃描用於創建表的對象的包名，多個包用“,”隔開
  database:
    type: mysql #數據庫類型 目前只支持mysql

運行啓動類

數據庫

方式二使用SpringData-JPA

項目結構

pom文件

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</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>
</dependency>
</dependencies>

  <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</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>
        </dependency>
    </dependencies>

實體類

package com.example.entity;

import org.hibernate.annotations.CreationTimestamp;
import org.hibernate.annotations.UpdateTimestamp;
import org.springframework.format.annotation.DateTimeFormat;
import javax.persistence.*;
import java.util.Date;


@Entity
@javax.persistence.Table(name = "my_user") //設置表名
@org.hibernate.annotations.Table(appliesTo = "my_user", comment = "測試信息")//設置表註釋
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)  //mysql自動增長
    @Column(name ="id",nullable = false,columnDefinition = "int(11) COMMENT '用戶ID'")
    private Long id;

    @Column(name ="avatar",nullable = false,columnDefinition = "varchar(100) COMMENT '頭像'")
    private String avatar;

    @Basic
    @Column(name ="username",nullable = false,columnDefinition = "varchar(50) COMMENT '用戶名'")
    private String username;

    @Column(name ="password",nullable = false,columnDefinition = "varchar(50) COMMENT '密碼'")
    private String password;

    @Column(name ="nickName",nullable = false,columnDefinition = "varchar(20) COMMENT '暱稱'")
    private String nickName;

    @Column(name ="email", columnDefinition = "varchar(20) COMMENT '郵箱'")
    private String email;

    @CreationTimestamp
    @Column(name ="create_time",nullable = false,columnDefinition = "DATETIME COMMENT '創建時間'")
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date createTime;

    @UpdateTimestamp
    @Column(name ="update_time",nullable = false,columnDefinition = "DATETIME COMMENT '修改時間'")
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date updateTime;

}

配置文件yml

server:
  port: 8082

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/mydemo?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8&useSSL=false
    username: root
    password: password

    #jpa配置  更新或自動生成表  控制檯打印sql
  jpa:
    database: mysql
    show-sql: true
    hibernate:
      ddl-auto: update

啓動類需要掃描實體類所在的包

@EntityScan(basePackages={"com.example.entity"})

運行啓動類

java通過實體類生成數據庫表並生成註釋

【安裝部署】Apache SeaTunnel 和 Web快速安裝詳解

一個.NET開源的功能豐富、靈活易用的 Windows 窗口增強神器

報廢車綜合管理系統系統源碼加微信820688215 獲取商業授權體驗官方地址 www.lvxun.vip

若依不分離部署阿里雲 nginx代理配置

山東政務雲配置nginx

linux磁盤掛載操作

GIS學習1 postGIS

https://yachay.unat.edu.pe/blog/index.php?comment_area=format_blog&comment_component=blog&comment_co

linux以太網驅動總結

java通過實體類生成數據庫表 並生成註釋

java通過實體類生成數據庫表並生成註釋