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1.lombok的使用

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2.Spring-mybatis-增删改查准备工作
This commit is contained in:
xuxin
2025-09-25 14:34:50 +08:00
parent c49a7571f6
commit 4040b06ab8
11 changed files with 255 additions and 64 deletions
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33
springboot-mybatis-crud/.gitignore vendored Normal file
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@@ -0,0 +1,33 @@
HELP.md
target/
!.mvn/wrapper/maven-wrapper.jar
!**/src/main/**/target/
!**/src/test/**/target/
### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr
### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
build/
!**/src/main/**/build/
!**/src/test/**/build/
### VS Code ###
.vscode/

83
springboot-mybatis-crud/pom.xml Normal file
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<?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>
<groupId>com.inmind</groupId>
<artifactId>springboot-mybatis-crud</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springboot-mybatis-crud</name>
<description>springboot-mybatis-crud</description>
<properties>
<java.version>11</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<spring-boot.version>2.7.6</spring-boot.version>
</properties>
<dependencies>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>com.mysql</groupId>
<artifactId>mysql-connector-j</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>11</source>
<target>11</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot.version}</version>
<configuration>
<mainClass>com.inmind.SpringbootMybatisCrudApplication</mainClass>
<skip>true</skip>
</configuration>
<executions>
<execution>
<id>repackage</id>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

13
springboot-mybatis-crud/src/main/java/com/inmind/SpringbootMybatisCrudApplication.java Normal file
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@@ -0,0 +1,13 @@
package com.inmind;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringbootMybatisCrudApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootMybatisCrudApplication.class, args);
}
}

8
springboot-mybatis-crud/src/main/java/com/inmind/mapper/EmpMapper.java Normal file
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@@ -0,0 +1,8 @@
package com.inmind.mapper;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface EmpMapper {
}

26
springboot-mybatis-crud/src/main/java/com/inmind/pojo/Emp.java Normal file
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@@ -0,0 +1,26 @@
package com.inmind.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.time.LocalDate;
import java.time.LocalDateTime;
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Emp {
private Integer id;//ID
private String username;//用户名
private String password;//密码
private String name;//姓名
private Short gender;//性别 1:男 2：女
private String image; //头像URL
private String job; // 职位 1:班主任 2:讲师 3:学工主管 4:教研主管 5:咨询师
private LocalDate entrydate; // 入职日期
private Integer deptId; // 部门ID
private LocalDateTime createTime;
private LocalDateTime updateTime;
}

14
springboot-mybatis-crud/src/main/resources/application.properties Normal file
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@@ -0,0 +1,14 @@
#下面这些内容是为了让MyBatis映射
#指定Mybatis的Mapper文件
mybatis.mapper-locations=classpath:mappers/*xml
#指定Mybatis的实体目录
mybatis.type-aliases-package=com.inmind.mybatis.entity
#驱动类名称
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
#数据库连接的url
spring.datasource.url=jdbc:mysql://localhost:3306/mybatis
#连接数据库的用户名
spring.datasource.username=root
#连接数据库的密码
spring.datasource.password=1234

13
springboot-mybatis-crud/src/test/java/com/inmind/SpringbootMybatisCrudApplicationTests.java Normal file
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@@ -0,0 +1,13 @@
package com.inmind;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
@SpringBootTest
class SpringbootMybatisCrudApplicationTests {
@Test
void contextLoads() {
}
}

12
springboot-mybatis-quickstart/pom.xml
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@@ -44,6 +44,18 @@
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--阿里巴巴的DRUID依赖-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.2.8</version>
</dependency>
<!--lombok依赖-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
</dependencies>
<!--统一springboot依赖管理版本-->
<dependencyManagement>

3
springboot-mybatis-quickstart/src/main/java/com/inmind/mapper/UserMapper.java
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@@ -14,6 +14,7 @@ public interface UserMapper {
/*
查询所有用户数据
*/
@Select("select * from user;")
// @Select("select * from user;")
@Select("select * from user")
public List<User> list();
}

70
springboot-mybatis-quickstart/src/main/java/com/inmind/pojo/User.java
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@@ -1,5 +1,14 @@
package com.inmind.pojo;
import lombok.*;
/*@Getter
@Setter
@ToString
@EqualsAndHashCode*/
@Data
@NoArgsConstructor //生成无参构造
@AllArgsConstructor//生成满参构造方法
public class User {
private Integer id;
private String name;
@@ -7,65 +16,4 @@ public class User {
private Short gender;
private String phone;
public User() {
}
public User(Integer id, String name, Integer age, Short gender, String phone) {
this.id = id;
this.name = name;
this.age = age;
this.gender = gender;
this.phone = phone;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", age=" + age +
", gender=" + gender +
", phone='" + phone + '\'' +
'}';
}
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;
}
public Short getGender() {
return gender;
}
public void setGender(Short gender) {
this.gender = gender;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
}

44
springboot-mybatis-quickstart/src/test/java/com/inmind/SpringbootMybatisQuickstartApplicationTests.java
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@@ -6,21 +6,61 @@ import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
@SpringBootTest
@SpringBootTest //该注解的作用，启动spring环境，所以也就有了IOC容器
class SpringbootMybatisQuickstartApplicationTests {
@Autowired//直接从IOC容器中获取UserMapper类型的对象
private UserMapper userMapper;
private UserMapper userMapper;//接口开发，多态
@Test
void contextLoads() {
//使用mybatis框架查询所有用户的数据
List<User> list = userMapper.list();
list.stream().forEach(user -> {
System.out.println(user.getId());
System.out.println(user);
});
}
@Test
void testJDBC() throws ClassNotFoundException, SQLException {
//1. 注册驱动
Class.forName("com.mysql.cj.jdbc.Driver");
//2. 获取连接对象
String url = "jdbc:mysql://localhost:3306/mybatis";
String username = "root";
String password = "1234";
Connection connection = DriverManager.getConnection(url, username, password);
//3. 获取执行SQL的对象Statement,执行SQL,返回结果
String sql = "select * from user";
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery(sql);
//4. 封装结果数据
List<User> userList = new ArrayList<>();
while (resultSet.next()){
int id = resultSet.getInt("id");
String name = resultSet.getString("name");
int age = resultSet.getInt("age");
short gender = resultSet.getShort("gender");
String phone = resultSet.getString("phone");
User user = new User(id,name,age,gender,phone);
userList.add(user);
}
//5. 释放资源
statement.close();
connection.close();
userList.forEach(System.out::println);
}
}