第一步,调出 Persistence 窗口.

File—>Project Structure—>model—> + —>JPA

第二步:打开 Persistence窗口

配置 生成实体类的参数

如图:

• 1.数据源,即链接数据库的信息,按要求填写数据库信息即可

• 2.生成实体类的位置.

• 3.实体类名称前缀.这里我什么都没写.

• 4.实体类名称后缀. 这里我写Entity. 比如数据库表名为 user,那么生成实体类为 UserEntity

• 5.选择哪些表的哪些字段生成实体类.这里我全选.

• 6.生成的实体类自动添加 JPA注解.

最后点击ok,就能在我们的项目下看到生成的实体类

如:

package com.itguang.weixinsell.entity;

import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import java.sql.Timestamp;

/**
* @author itguang
* @create 2017-11-25 14:02
**/
@Entity
@Table(name = "product_category", schema = "sell", catalog = "")
public class ProductCategoryEntity {
private int categoryId;
private String categoryName;
private int categoryType;
private Timestamp createTime;
private Timestamp updateTime;

@Id
@Column(name = "category_id")
public int getCategoryId() {
return categoryId;
}

public void setCategoryId(int categoryId) {
this.categoryId = categoryId;
}

@Basic
@Column(name = "category_name")
public String getCategoryName() {
return categoryName;
}

public void setCategoryName(String categoryName) {
this.categoryName = categoryName;
}

@Basic
@Column(name = "category_type")
public int getCategoryType() {
return categoryType;
}

public void setCategoryType(int categoryType) {
this.categoryType = categoryType;
}

@Basic
@Column(name = "create_time")
public Timestamp getCreateTime() {
return createTime;
}

public void setCreateTime(Timestamp createTime) {
this.createTime = createTime;
}

@Basic
@Column(name = "update_time")
public Timestamp getUpdateTime() {
return updateTime;
}

public void setUpdateTime(Timestamp updateTime) {
this.updateTime = updateTime;
}

@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;

ProductCategoryEntity that = (ProductCategoryEntity) o;

if (categoryId != that.categoryId) return false;
if (categoryType != that.categoryType) return false;
if (categoryName != null ? !categoryName.equals(that.categoryName) : that.categoryName != null) return false;
if (createTime != null ? !createTime.equals(that.createTime) : that.createTime != null) return false;
if (updateTime != null ? !updateTime.equals(that.updateTime) : that.updateTime != null) return false;

return true;
}

@Override
public int hashCode() {
int result = categoryId;
result = 31 * result + (categoryName != null ? categoryName.hashCode() : 0);
result = 31 * result + categoryType;
result = 31 * result + (createTime != null ? createTime.hashCode() : 0);
result = 31 * result + (updateTime != null ? updateTime.hashCode() : 0);
return result;
}
}