Error invoking SqlProvider method (tk.mybatis.mapper.provider.base.BaseSelectProvider.dynamicSQL)

• • 解决方案
  • 整个目录

：
1.先看pom.xml中的mapper-spring-boot-starter版本要为2.x.x

      tk.mybatis
      mapper-spring-boot-starter
      2.1.5
  

2.@MapperScan的引用

import tk.mybatis.spring.annotation.MapperScan;

配置文件

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/test
    username: root
    password: root
    type: com.alibaba.druid.pool.DruidDataSource

  mybatis:
    type-aliases-package: com.test.pojo

Application

package com.test;


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

@SpringBootApplication
@MapperScan(basePackages = "com.test.dao")
@EnableTransactionManagement
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class);
    }
}

pojo/User

package com.test.pojo;

import javax.persistence.Entity;
import javax.persistence.Table;
import java.io.Serializable;

@Entity
@Table(name = "tb_user")
public class User implements Serializable {
    private Integer id;
    private String name;
    private Integer age;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + ''' +
                ", age=" + age +
                '}';
    }
}

dao/UserMapper

package com.test.dao;

import com.test.pojo.User;
import tk.mybatis.mapper.common.Mapper;
// 一旦继承了Mapper，继承的Mapper就拥有了Mapper所有的通用方法
public interface UserMapper extends Mapper {
}