概要：Mybatis plus 官网链接 ：https://mp.baomidou.com/guide/
一、依赖配置：
4.0.0 org.springframework.boot spring-boot-starter-parent 2.2.6.RELEASE com.example demo 0.0.1-SNAPSHOT demo Demo project for Spring Boot 1.8 org.springframework.boot spring-boot-starter-web mysql mysql-connector-java runtime org.projectlombok lombok true com.baomidou mybatisplus-spring-boot-starter 1.0.5 org.springframework.boot spring-boot-starter-test test org.junit.vintage junit-vintage-engine com.baomidou mybatis-plus 3.3.1 org.springframework.boot spring-boot-maven-plugin
二、数据源和插件相关配置
- application.yml
server: port: 8080 servlet: context-path: / # Logger Config logging: level: com.baomidou.mybatisplus.samples.quickstart: debug
- db.properties
spring.datasource.jdbc-url = jdbc:mysql://localhost:3306/demo?serverTimezone=UTC&characterEncoding=utf8 spring.datasource.username = root spring.datasource.password = 123456 spring.datasource.driverClassName = com.mysql.cj.jdbc.Driver
- MybatisPlusConfig
package com.example.demo.config;
import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.pagination.optimize.JsqlParserCountOptimize;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@EnableTransactionManagement
@Configuration
@MapperScan("com.example.demo.mapper")
public class MybatisPlusConfig {
@Bean("paginationInterceptor")
public PaginationInterceptor paginationInterceptor() {
PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));
paginationInterceptor.setDbType(DbType.MYSQL);
return paginationInterceptor;
}
}
- SqlSessionConfig
package com.example.demo.config;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;
import org.apache.ibatis.plugin.Interceptor;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import javax.sql.DataSource;
@Configuration
@PropertySource("classpath:db/db.properties")
public class SqlSessionConfig {
private Logger logger = LoggerFactory.getLogger(SqlSessionConfig.class);
@Bean("myDatasource")
@ConfigurationProperties(prefix="spring.datasource")
public DataSource masterDataSource() {
return DataSourceBuilder.create().build();
}
@Bean("mySqlSessionFactoryBean")
public MybatisSqlSessionFactoryBean createSqlSessionFactory(@Qualifier("myDatasource") DataSource dataSource,
@Qualifier("paginationInterceptor") PaginationInterceptor paginationInterceptor) {
// MybatisSqlSessionFactory
MybatisSqlSessionFactoryBean sqlSessionFactoryBean = null;
try {
// 实例SessionFactory
sqlSessionFactoryBean = new MybatisSqlSessionFactoryBean();
// 配置数据源
sqlSessionFactoryBean.setDataSource(dataSource);
// 设置 MyBatis-Plus 分页插件
Interceptor [] plugins = {paginationInterceptor};
sqlSessionFactoryBean.setPlugins(plugins);
// 加载MyBatis配置文件
PathMatchingResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();
sqlSessionFactoryBean.setMapperLocations(resourcePatternResolver.getResources("classpath*:mapper/*.xml"));
} catch (Exception e) {
logger.error("Init SqlSessionFactory Error：{}", e.getMessage());
}
return sqlSessionFactoryBean;
}
@Bean
public MapperScannerConfigurer myGetMapperScannerConfigurer() {
MapperScannerConfigurer myMapperScannerConfigurer = new MapperScannerConfigurer();
myMapperScannerConfigurer.setBasePackage("com.example.demo.mapper");
myMapperScannerConfigurer.setSqlSessionFactoryBeanName("mySqlSessionFactoryBean");
return myMapperScannerConfigurer;
}
}
三、测试类
- UserController
package com.example.demo.controller;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.demo.bean.UserDTO;
import com.example.demo.entity.User;
import com.example.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import java.time.LocalDateTime;
import java.util.List;
@RestController
@RequestMapping(value = "/demo")
public class UserController {
@Autowired
private UserService userService;
@RequestMapping(value = "/create", method = RequestMethod.POST)
public String create(@RequestBody UserDTO userDTO){
User user = new User();
user.setName(userDTO.getName());
user.setPhone(userDTO.getPhone());
user.setCreateTime(LocalDateTime.now());
user.setEnable(true);
user.setVersion(1L);
userService.insert(user);
return "ok";
}
@RequestMapping(value = "/delete", method = RequestMethod.POST)
public String create(Long id){
userService.deleteById(id);
return "ok";
}
@RequestMapping(value = "/update", method = RequestMethod.POST)
public String update(@RequestBody UserDTO userDTO){
User user = new User();
user.setId(userDTO.getId());
user.setName(userDTO.getName());
user.setPhone(userDTO.getPhone());
user.setCreateTime(LocalDateTime.now());
userService.updateById(user);
return "ok";
}
@RequestMapping(value = "/queryPage", method = RequestMethod.POST)
public List update(Integer pageNo, Integer pageSize){
Page page = new Page<>(pageNo, pageSize);
return userService.queryList(page, 1);
}
}
- UserService
package com.example.demo.service.impl;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.demo.mapper.UserMapper;
import com.example.demo.entity.User;
import com.example.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
import java.util.Optional;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserMapper userMapper;
@Override
public int insert(User user) {
return userMapper.insert(user);
}
@Override
public int deleteById(Long id) {
return userMapper.deleteById(id);
}
@Override
public int updateById(User user) {
return userMapper.updateById(user);
}
@Override
public List queryList(Page page, Integer enable) {
return userMapper.selectPageByEnable(page, enable).getRecords();
}
}
- UserMapper
package com.example.demo.mapper; import com.baomidou.mybatisplus.core.mapper.BaseMapper; import com.baomidou.mybatisplus.core.metadata.IPage; import com.baomidou.mybatisplus.extension.plugins.pagination.Page; import com.example.demo.entity.User; import org.apache.ibatis.annotations.Mapper; import org.springframework.stereotype.Repository; @Mapper @Repository public interface UserMapper extends BaseMapper{ IPage selectPageByEnable(Page page, Integer enable); }
- User
package com.example.demo.entity;
import com.baomidou.mybatisplus.annotation.*;
import lombok.Data;
import java.time.LocalDateTime;
@Data
@TableName("user")
public class User{
@TableId(value = "id", type = IdType.AUTO)
private Long id;
@TableField("name")
private String name;
@TableField("phone")
private String phone;
@TableField("create_time")
private LocalDateTime createTime;
@TableLogic(delval = "0", value = "1")
@TableField("enable")
private boolean enable;
@Version
@TableField("version")
private Long version;
}
- SqlMap
- DDL
CREATE TABLE `user` ( `id` bigint NOT NULL AUTO_INCREMENT, `name` varchar(20) NOT NULL, `phone` char(11) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL, `enable` tinyint NOT NULL, `create_time` datetime NOT NULL, `version` bigint NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
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