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。

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
<groupId>com.chenxin</groupId>

<artifactId>springboot_0702</artifactId>

<version>0.0.1-SNAPSHOT</version>

<packaging>jar</packaging>
<name>springboot_0702</name>

<description>Demo project for Spring Boot</description>
<parent>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-parent</artifactId>

<version>1.5.9.RELEASE</version>

<relativePath/> <!-- lookup parent from repository -->

</parent>
<properties>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

<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-thymeleaf</artifactId>

</dependency>
<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-test</artifactId>

<scope>test</scope>

</dependency>

<!-- Junit依赖 -->

<!--junit不需要springboot已经自动加载了。-->

　　　　　<!--spring-boot-starter-jdbc已经包含在了mybatis-spring-boot-starter中了。-->

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.5</version>
        </dependency>

        <!--引入mybatis-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.0</version>
        </dependency>
        <!--mybatis分页插件-->
        <!-- https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper-spring-boot-starter -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.1.1</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

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<Map> findAll();



}

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<User> findAll() throws Exception;
@Select("select * from users where phone=#{phone}")

public List<User> 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<User> 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

posted @ 2019-08-19 10:14 星朝阅读(1185) 评论(0) 收藏举报

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学习springboot整合mybatis并编写测试类

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