作用

存放一些其他项目公用的东西，比如实体类，工具类等

新建Module

该Module为Maven项目，命名为microservice-common

继承依赖

在pom.xml文件中加入：

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<parent>
  <groupId>org.example</groupId>
  <artifactId>microservice</artifactId>
  <version>1.0-SNAPSHOT</version>
</parent>

引入依赖

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<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
</dependency>

修改pom.xml

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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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>org.example</groupId>
    <artifactId>microservice</artifactId>
    <version>1.0-SNAPSHOT</version>
  </parent>

  <artifactId>microservice-common</artifactId>
  <packaging>war</packaging>

  <name>microservice-common Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
    </dependency>
  </dependencies>
</project>

新建Student实体类

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package com.ledao.entity;

import javax.persistence.*;
import java.io.Serializable;

/**
 * 学生实体类
 *
 * @author LeDao
 * @company
 * @create 2021-08-11 13:27
 */
@Entity
@Table(name = "t_student")
public class Student implements Serializable {

    private static final long serialVersionUID = 1L;

    /**
     * 编号
     */
    @Id
    @GeneratedValue
    private Integer id;

    /**
     * 名字
     */
    @Column(length = 50)
    private String name;

    /**
     * 年纪
     */
    @Column(length = 50)
    private String grade;

    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 String getGrade() {
        return grade;
    }

    public void setGrade(String grade) {
        this.grade = grade;
    }
}

新建数据库

新建一个名为db_springcloud的数据库，不需要添加表，jpa会根据实体类自动生成