学习springboot整合mybatis并编写测试类

遇到的问题：

1.原因是在启动类上只有一个@MapperScan注解。需要配置这个注解的basePackages。

@MapperScan(basePackages = {"com.chenxin.springboot_0702"})

之后删除掉@EnableAutoConfiguration和@ComponentScan(basePackages = {"com.chenxin.springboot_0702"})也照样运行成功。

 第二个问题：测试类 里面用@Autowired注解自动装配UserMapper时会有提示报错，但是执行起来没有问题，可以通过。

改成@Resource注解则没有红线了。

　　　　　　

 

 

首先配置pom.xml文件。springboot的项目都是jar包，不是war包。还有就是依赖模块spring-boot-starter-jdbc不需要，因为在mybatis-spring-boot-starter中已经包含了。

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    4.0.0

    com.chenxin
    springboot_0702
    0.0.1-SNAPSHOT
    jar

    springboot_0702
    Demo project for Spring Boot

    
        org.springframework.boot
        spring-boot-starter-parent
        1.5.9.RELEASE
         
    

    
        UTF-8
        UTF-8
        1.8
    

    
        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.springframework.boot
            spring-boot-starter-thymeleaf
        

        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        
        

　　　　　

        
            mysql
            mysql-connector-java
        
        
            com.alibaba
            druid
            1.0.5
        

        
        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
            1.3.0
        
        
        
        
            com.github.pagehelper
            pagehelper-spring-boot-starter
            1.1.1
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

application.properties

#配置mysql的连接配置
spring.datasource.url=jdbc:mysql://localhost:3306/testx
spring.datasource.username=root
spring.datasource.password=123
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

接着是model类。

| users | CREATE TABLE `users` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `username` varchar(45) NOT NULL,
  `password` varchar(145) NOT NULL,
  `name` varchar(45) DEFAULT NULL,
  `courseId` int(11) DEFAULT NULL,
  `image` varchar(150) DEFAULT NULL,
  `email` varchar(45) DEFAULT NULL,
  `address` varchar(45) DEFAULT NULL,
  `phone` varchar(45) DEFAULT NULL,
  `createdAt` bigint(20) DEFAULT NULL,
  `updatedAt` bigint(20) DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `username` (`username`) USING HASH
) ENGINE=InnoDB AUTO_INCREMENT=17 DEFAULT CHARSET=utf8 |

import java.io.Serializable;
public class User implements Serializable {
    private long id;
    private String userName;
    private String password;
    private String name;
    private int courseId;
    private String image;
    private String email;
    private String address;
    private String phone;
    private long createdAt;
    protected long updatedAt;

    public User() {
    }
    //其他getter和setter
　　 //toString方法
}

然后是mapper类。

import com.chenxin.springboot_0702.model.User;
import org.apache.ibatis.annotations.*;
import org.apache.ibatis.mapping.StatementType;

import java.util.List;
import java.util.Map;

@Mapper
public interface UserMapper {

    @Select("select * from users")
    public List

接着说springboot启动类。最开始提过了在这里只用了springboot整合mybatis和mysql。所以@ComponentScan和@EnableAutoConfiguration。

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;

@SpringBootApplication
//开启通用注解扫描
//@ComponentScan(basePackages = {"com.chenxin.springboot_0702"})
@MapperScan(basePackages = {"com.chenxin.springboot_0702"})
//@EnableAutoConfiguration
public class Run {

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

 测试类

import com.chenxin.springboot_0702.dao.UserMapper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.SpringBootConfiguration;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import javax.annotation.Resource;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = Run.class)
@EnableAutoConfiguration
public class RunTests {
    @Resource
    private UserMapper userMapper;

    @Test
    public void contextLoads() {
    }


    @Test
    public void G() {
        System.out.println(userMapper.findAll());
    }
}

 

接下来是其他的增删改查。其中更新使用的@Update注解，貌似可以自动判断是否为空，只要为空就不更新了。

import com.chenxin.springboot_0702.model.User;
import org.apache.ibatis.annotations.*;
import org.apache.ibatis.mapping.StatementType;

import java.util.List;
import java.util.Map;

@Mapper
public interface UserMapper {

    //查询
    @Select("select * from users where id = #{id}")
    public User findById(@Param("id") long id) throws Exception;

    @Select("select * from users")
    public List findAll() throws Exception;

    @Select("select * from users where phone=#{phone}")
    public List findByPhone(@Param("phone") String phone) throws Exception;

    //新增
    @Insert("INSERT INTO users(id,username,password,name,courseId,image,email,address,phone,createdAt,updatedAt) VALUES (#{id},#{username},#{password},#{name},#{courseId},#{image},#{email},#{address},#{phone},#{createdAt},#{updatedAt})")
    @Options(useGeneratedKeys = true, keyProperty = "id")
    public int add(User user) throws Exception;

    //删除
    @Delete("delete from users where id = #{id}")
    public boolean delete(@Param("id") long id) throws Exception;

    //更新
    @Update("update users set username=#{username}, password=#{password}, name=#{name}, courseId=#{courseId}, image=#{image}, email=#{email}, address=#{address}, phone=#{phone}, updatedAt=#{updatedAt} where id=#{id}")
    public boolean update(User user) throws Exception;
}

测试单元

import com.chenxin.springboot_0702.dao.UserMapper;
import com.chenxin.springboot_0702.model.User;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import javax.annotation.Resource;
import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = Run.class)
@EnableAutoConfiguration
public class RunTests {
    
    @Resource
    private UserMapper userMapper;
    
    @Test
    public void G() throws Exception {
        System.out.println(userMapper.findAll());
    }
    @Test
    public void g1() throws Exception {
        System.out.println(userMapper.findById(12L));
    }
    @Test
    public void g3() throws Exception {
        User user = new User();
        user.setName("无极");
        user.setUsername("六六qijiu");
        user.setPassword("12443345");
        userMapper.add(user);
        System.out.println(user.getId());
    }
    @Test
    //删除
    public void g4() throws Exception{
        long id = 14;
        System.out.println(userMapper.delete(id));
    }

    @Test
    //更新
    public void g5() throws Exception{
        User user = userMapper.findById(16);
        user.setUsername("七七七");
        System.out.println(userMapper.update(user));
    }
    @Test
    public void g6() throws Exception{
        List users = userMapper.findByPhone("13101436674");
        for (User user : users)
            System.out.println(user.getId() + "***" + user.getPhone());
    }
}

原文地址：https://www.cnblogs.com/JasonChen92/p/9259629.html

转载于:https://www.cnblogs.com/jpfss/p/11375538.html