参考官网:
https://github.com/abel533/Mapper
https://github.com/abel533/Mapper/wiki/1.3-spring-boot
MyBatis通用Mapper是一款MyBatis增强插件,可以根据数据库表快速生成实体Entity、数据访问对象模型DAO,数据库映射文件Mapper。
一、整合通用Mapper
1.1、在项目pom.xml中添加依赖(文章最后面提供完整pom.xml)
放在<denpendencies>下
<!-- 自动生成getter和setter,构造器-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.8</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>2.1.5</version>
</dependency>
由于通用mapper集成了MyBatis,所以这里我们需要将下方MyBatista的依赖删除掉
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.2.1</version>
</dependency>
1.2、在application.yml中添加数据库配置属性
server:
port: 8082
spring:
datasource:
url: jdbc:mysql://39.107.35.145:3306/mybatis_plus?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8
username: root
password: Aa123123.
driver-class-name: com.mysql.cj.jdbc.Driver #8.0??
#driver-class-name: com.mysql.jdbc.Driver
1.3、在pom.xml中添加插件
继续添加依赖,整合通用代码生成器(文章最后面提供完整pom.xml)
放在<build>——<plugins>下
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.6</version>
<configuration>
<configurationFile>
${basedir}/src/main/resources/generator/generatorConfig.xml
</configurationFile>
<overwrite>true</overwrite>
<verbose>true</verbose>
</configuration>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.16</version>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>4.1.5</version>
</dependency>
</dependencies>
</plugin>
1.4、 配置通用mapper
在resource中创建文件夹generator及配置文件config.properties和generatorConfig.xml(文章最后面提供完整文件)
1.4.1、配置config.properties
jdbc.driverClass=com.mysql.cj.jdbc.Driver
#jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://39.107.35.145:3306/mybatis_plus?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8
jdbc.user=root
jdbc.password=Aa123123.
# 模块名(包名)
moduleName=user
# 表名
tableName=user
1.4.2、generatorConfig.xml
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<properties resource="generator/config.properties"/>
<context id="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">
<property name="beginningDelimiter" value="`"/>
<property name="endingDelimiter" value="`"/>
<plugin type="tk.mybatis.mapper.generator.MapperPlugin">
<property name="mappers" value="tk.mybatis.mapper.common.Mapper"/>
<property name="caseSensitive" value="true"/>
<property name="lombok" value="Getter,Setter,ToString"/>
</plugin>
<jdbcConnection driverClass="${jdbc.driverClass}"
connectionURL="${jdbc.url}"
userId="${jdbc.user}"
password="${jdbc.password}">
</jdbcConnection>
<!--实体-->
<javaModelGenerator targetPackage="com.jf.demo5.entity.${moduleName}"
targetProject="src/main/java"/>
<!--mapper.xml-->
<sqlMapGenerator targetPackage="com.jf.demo5.dao.${moduleName}"
targetProject="src/main/resources"/>
<!--mapper接口-->
<javaClientGenerator targetPackage="com.jf.demo5.dao.${moduleName}"
targetProject="src/main/java"
type="XMLMAPPER"/>
<!--为哪张表生成代码-->
<table tableName="${tableName}">
<generatedKey column="id" sqlStatement="JDBC"/>
</table>
</context>
</generatorConfiguration>
1.5、通过mybatis-generator生成代码
代码生成器的使用方式:可以自动生成实体、dao和mapper.xml
效果如下:
二、测试
2.1、新建TestController测试
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired(required = false)
private UserMapper userMapper;
/**
* 测试查询
* @return
*/
@GetMapping("/t1")
@ResponseBody
public List<User> getuser(){
List<User> users = userMapper.selectAll();
return users;
}
2.2、在BootApplication中添加@MapperScan注解扫描dao
注意:导入的MapperScan是tk包下的
package com.jf.demo5;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import tk.mybatis.spring.annotation.MapperScan;
@SpringBootApplication
@MapperScan("com.jf.demo5.dao")
public class Demo5Application {
public static void main(String[] args) {
SpringApplication.run(Demo5Application.class, args);
}
}
2.3、测试
2.4、测试添加、修改、删除
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired(required = false)
private UserMapper userMapper;
/**
* 测试查询
* @return
*/
@GetMapping("/t1")
@ResponseBody
public List<User> getuser(){
List<User> users = userMapper.selectAll();
return users;
}
/**
* 测试添加
* @return
*/
@GetMapping("/t2")
@ResponseBody
public String adduser(){
User u = new User();
u.setName("英英");
u.setAge(18);
u.setEmail("1234567@163.com");
int rows = userMapper.insert(u);
if (rows > 0){
return "添加成功";
}
else {
return "添加失败";
}
}
/**
* 测试修改
* @return
*/
@GetMapping("/t3")
@ResponseBody
public String updateuser(){
User u = new User();
u.setName("小樱");
u.setId(25l);
int rows = userMapper.modify(u);
if (rows > 0){
return "修改成功";
}
else {
return "修改失败";
}
}
/**
* 测试删除
* @return
*/
@GetMapping("/t4")
@ResponseBody
public String deleteuser(){
User u = new User();
u.setId(25l);
int rows = userMapper.delete(u);
if (rows > 0){
return "删除成功";
}
else {
return "删除失败";
}
}
}
数据库效果如下:
数据库效果如下:
数据库效果如下:
三、完整pom.xml及源代码
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.1</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.jf</groupId>
<artifactId>Demo5</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Demo5</name>
<description>Demo5</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- 自动生成getter和setter,构造器-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.8</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>2.1.5</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.6</version>
<configuration>
<configurationFile>
${basedir}/src/main/resources/generator/generatorConfig.xml
</configurationFile>
<overwrite>true</overwrite>
<verbose>true</verbose>
</configuration>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.16</version>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>4.1.5</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
附录一:解决jar包依赖找不到问题
第1步:在你自己的本地仓库找到你所需要添加的 jar 包,如下
第2步:右键,工程项目,找到如下图所示:
第3步:手动添加你刚刚找到的 jar 包,如下图:
第4步:添加成功,如下图:
参考自:
解决“driver-class-name: com.mysql.jdbc.Driver”无法解析问题_Alpha_xxy的博客-CSDN博客_driver-class-name:
SpringCloud第03讲:(番外篇)整合MyBatis通用Mapper_大坏蛋^_^的博客-CSDN博客_springcloud整合mybatis
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