spring使用 hibernate jpa JpaRepository

使用JpaRepository需要两个架包：

 <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>2.1.2.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.3.6.Final</version>
        </dependency>

1、创建实体类：Role 

package com.wbg.Jpa.entity;

import com.sun.javafx.geom.transform.Identity;

import javax.persistence.*;

@Entity
@Table
public class Role {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
    //比如数据库名字是names  指定设置为：
    @Column(name = "role_name")
    private String roleName;
    private String note;


    @Override
    public String toString() {
        return "Role{" +
                "id=" + id +
                ", roleName='" + roleName + '\'' +
                ", note='" + note + '\'' +
                '}';
    }

    public Role() {
    }

    public Role(int id, String roleName, String note) {
        this.id = id;
        this.roleName = roleName;
        this.note = note;
    }

    public int getId() {
        return id;
    }

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

    public String getRoleName() {
        return roleName;
    }

    public void setRoleName(String roleName) {
        this.roleName = roleName;
    }

    public String getNote() {
        return note;
    }

    public void setNote(String note) {
        this.note = note;
    }
}

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