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基于MyBatis提供了很多第三方插件，这些插件通常可以完成数据操作方法的封装（GeneralDAO）、数据库逆向工程工作(根据数据表生成实体类、生成映射文件)

tkMapper就是一个MyBatis插件，是在MyBatis的基础上提供了很多工具，让开发变得简单，提高开发效率。
提供了针对单表通用的数据库操作方法
逆向工程（根据数据表生成实体类、dao接口、映射文件）

tkMapper整合

整合mybatis

依赖

		<dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.20</version>
        </dependency>


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

配置类

server:
  port: 8080
  servlet:
    context-path: /

#连接数据库的信息
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/fmmall?serverTimezone=UTC&useUnicode=true&characterEncoding=UTF-8
    username: root
    password: 123456


mybatis:
  # 扫描映射文件
  mapper-locations: classpath:mapper/*.xml
  # 配置别名扫描的包
  type-aliases-package: com.blb.entity
  configuration:
    # 开启驼峰映射配置
    map-underscore-to-camel-case: true

启动类扫描

@SpringBootApplication
@MapperScan("com.blb.mapper")
public class TkmapperApplication { 
   

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

}

整合tkMapper

依赖

<dependency>
    <groupId>tk.mybatis</groupId>
    <artifactId>mapper-spring-boot-starter</artifactId>
    <version>2.1.5</version>
</dependency>

修改启动类的`@MapperScan`注解的包

为tk.mybatis.spring.annotation.MapperScan

package com.blb;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import tk.mybatis.spring.annotation.MapperScan;

@SpringBootApplication
@MapperScan("com.blb.mapper")
public class TkmapperApplication { 
   

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

}

tkMapper使用

创建数据表

CREATE TABLE `users`  (
  `user_id` int(64) NOT NULL AUTO_INCREMENT COMMENT '主键id 用户id',
  `username` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '用户名 用户名',
  `password` varchar(64) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '密码 密码',
  `nickname` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '昵称 昵称',
  `realname` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '真实姓名 真实姓名',
  `user_img` varchar(1024) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '头像 头像',
  `user_mobile` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '手机号 手机号',
  `user_email` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '邮箱地址 邮箱地址',
  `user_sex` char(1) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '性别 M(男) or F(女)',
  `user_birth` date NULL DEFAULT NULL COMMENT '生日 生日',
  `user_regtime` datetime(0) NOT NULL COMMENT '注册时间 创建时间',
  `user_modtime` datetime(0) NOT NULL COMMENT '更新时间 更新时间',
  PRIMARY KEY (`user_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '用户 ' ROW_FORMAT = Compact;

创建实体类

@Data
@NoArgsConstructor
@AllArgsConstructor


@Table(name="users")// 表名和数据库名不一致无法映射
public class User { 
   

    private int userId;
    private String username;
    private String password;
    private String nickname;
    private String realname;
    private String userImg;
    private String userMobile;
    private String userEmail;
    private String userSex;
    private Date userBirth;
    private Date userRegtime;
    private Date userModtime;

}

创建Mapper接口

tkMapper已经完成了对单表的通用操作的封装，封装在Mapper接口和MySqlMapper接口；因此如果我们要完成对单表的操作，只需自定义Mapper接口继承Mapper接口和MySqlMapper接口

package com.blb.mapper;

import com.blb.entity.User;
import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;

public interface UserMapper extends Mapper<User>, MySqlMapper<User> { 
   
}

测试

@SpringBootTest
class TkmapperApplicationTests { 
   


    @Autowired
   private UserMapper userMapper;
    @Test
    void testInsert() { 
   
        User user=new User();
        user.setUsername("aaaa");
        user.setPassword("1111");
        user.setUserImg("img/default.png");
        user.setUserRegtime(new Date());
        user.setUserModtime(new Date());
        int insert = userMapper.insert(user);
        System.out.println(insert);
    }

}

tkMapper的常用方法

package com.blb.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import javax.persistence.Column;
import javax.persistence.Id;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Category { 
   

    @Id
    private Integer categoryId;
    private String categoryName;
    private Integer categoryLevel;
    private Integer parentId;
    private String categoryIcon;
    private String categorySlogan;
    private String categoryPic;
    private String categoryBgColor;

}

package com.blb.mapper;

import com.blb.entity.Category;
import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;

public interface CategoryMapper extends Mapper<Category>, MySqlMapper<Category> { 
   
}

增删改

添加

Category category = new Category(0,"测试类别3",1,0,"03.png","xixi","aaa.jpg","black");
        //int i = categoryMapper.insert(category);
        int i = categoryMapper.insertUseGeneratedKeys(category);
        System.out.println(category.getCategoryId());
        assertEquals(1,i);

注意如果要主键回填一定要在对应的实体类的主键上添加@Id

修改

Category category = new Category(48,"测试类别4",1,0,"04.png","heihei","aaa.jpg","black");
        int i = categoryDAO.updateByPrimaryKey(category);
        // 根据自定义条件修改，Example example就是封装条件的
        // int i1 = categoryDAO.updateByExample( Example example);
        assertEquals(1,i);

删除

  int i = categoryDAO.deleteByPrimaryKey(48);
        // 根据条件删除
        //int i1 = categoryDAO.deleteByExample(Example example);
        assertEquals(1,i);

查询

查询所有

 //查询所有
        List<Category> categories = categoryDAO.selectAll();
        for (Category category: categories) { 
   
            System.out.println(category);
        }

根据主键查询

//根据主键查询
        Category category = categoryDAO.selectByPrimaryKey(47);
        System.out.println(category);

条件查询

//条件查询
        //1.创建一个Example封装 类别Category查询条件
        Example example = new Example(Category.class);
        Example.Criteria criteria = example.createCriteria();
        criteria.andEqualTo("categoryLevel",1);
        criteria.orLike("categoryName","%干%");

        List<Category> categories = categoryDAO.selectByExample(example);
        for (Category category: categories) { 
   
            System.out.println(category);
        }

分页查询

//分页查询
        int pageNum = 2;
        int pageSize = 10;
        int start = (pageNum-1)*pageSize;

        RowBounds rowBounds = new RowBounds(start,pageSize);
        List<Category> categories = categoryDAO.selectByRowBounds(new Category(), rowBounds);
        for (Category category: categories) { 
   
            System.out.println(category);
        }

        //查询总记录数
        int i = categoryDAO.selectCount(new Category());
        System.out.println(i);

带条件分页查询

//带条件分页
        //条件
        Example example = new Example(Category.class);
        Example.Criteria criteria = example.createCriteria();
        criteria.andEqualTo("categoryLevel",1);
        //分页
        int pageNum = 2;
        int pageSize = 3;
        int start = (pageNum-1)*pageSize;
        RowBounds rowBounds = new RowBounds(start,pageSize);

        List<Category> categories = categoryDAO.selectByExampleAndRowBounds(example,rowBounds);
        for (Category category: categories) { 
   
            System.out.println(category);
        }

        //查询总记录数（满足条件）
        int i = categoryDAO.selectCountByExample(example);
        System.out.println(i);

关联查询

就想原来一样在接口里写方法，写mybatis的xml即可

逆向工程

逆向工程，根据创建好的数据表，生成实体类、DAO、映射文件、

添加逆向工程依赖

<build>
        <plugins>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.7</version>

                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>8.0.20</version>
                    </dependency>
                    <dependency>
                        <groupId>tk.mybatis</groupId>
                        <artifactId>mapper</artifactId>
                        <version>4.1.5</version>
                    </dependency>
                </dependencies>
            </plugin>

            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
    <!-- 引入数据库连接配置 -->
    <!-- <properties resource="jdbc.properties"/>-->

    <context id="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>

        <!-- 配置 GeneralDAO -->
        <plugin type="tk.mybatis.mapper.generator.MapperPlugin">
            <property name="mappers" value="com.blb.general.GeneralMapper"/>
        </plugin>

        <!-- 配置数据库连接 -->
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/fmmall?serverTimezone=UTC&amp;useUnicode=true&amp;characterEncoding=UTF-8" userId="root" password="123456">
        </jdbcConnection>

        <!-- 配置实体类存放路径 -->
        <javaModelGenerator targetPackage="com.blb.entity" targetProject="src/main/java"/>

        <!-- 配置 XML 存放路径 -->
        <sqlMapGenerator targetPackage="/" targetProject="src/main/resources/mapper"/>

        <!-- 配置 DAO 存放路径 -->
        <javaClientGenerator targetPackage="com.blb.mapper" targetProject="src/main/java" type="XMLMAPPER"/>

        <!-- 配置需要指定生成的数据库和表，% 代表所有表 -->
        <table tableName="%">
            <!-- mysql 配置 -->
            <!-- <generatedKey column="id" sqlStatement="Mysql" identity="true"/>-->
        </table>
        <!-- <table tableName="tb_roles">-->
        <!-- &lt;!&ndash; mysql 配置 &ndash;&gt;-->
        <!-- <generatedKey column="roleid" sqlStatement="Mysql" identity="true"/>-->
        <!-- </table>-->
        <!-- <table tableName="tb_permissions">-->
        <!-- &lt;!&ndash; mysql 配置 &ndash;&gt;-->
        <!-- <generatedKey column="perid" sqlStatement="Mysql" identity="true"/>-->
        <!-- </table>-->
    </context>
</generatorConfiguration>

<build>
        <plugins>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.5</version>
                <configuration>
                    <configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile>
                </configuration>

                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>8.0.20</version>
                    </dependency>
                    <dependency>
                        <groupId>tk.mybatis</groupId>
                        <artifactId>mapper</artifactId>
                        <version>3.4.4</version>
                    </dependency>
                </dependencies>
            </plugin>

            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

发布者：全栈程序员-站长，转载请注明出处：https://javaforall.net/184975.html原文链接：https://javaforall.net

tkmapper教程_trello怎么用

tkMapper

tkMapper整合

整合mybatis

依赖

配置类

启动类扫描

整合tkMapper

依赖

修改启动类的`@MapperScan`注解的包

tkMapper使用

创建数据表

创建实体类

创建Mapper接口

测试

tkMapper的常用方法

增删改

添加

修改

删除

查询

查询所有

根据主键查询

条件查询

分页查询

带条件分页查询

关联查询

逆向工程

添加逆向工程依赖

发表回复

tkmapper教程_trello怎么用

tkMapper

tkMapper整合

整合mybatis

依赖

配置类

启动类扫描

整合tkMapper

依赖

修改启动类的@MapperScan注解的包

tkMapper使用

创建数据表

创建实体类

创建Mapper接口

测试

tkMapper的常用方法

增删改

添加

修改

删除

查询

查询所有

根据主键查询

条件查询

分页查询

带条件分页查询

关联查询

逆向工程

添加逆向工程依赖

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发表回复

修改启动类的`@MapperScan`注解的包