用JPA构建实体数据表

谁借莪１个温暖的怀抱￠ 2021-07-24 16:05 367阅读 0赞

**一 代码位置**

[https://gitee.com/cakin24/code/tree/master/08/JpaEntityDemo][https_gitee.com_cakin24_code_tree_master_08_JpaEntityDemo]

**二 代码**

package com.example.demo.entity;
    
    import lombok.Data;
    import javax.persistence.*;
    import javax.validation.constraints.NotEmpty;
    import javax.validation.constraints.Size;
    import java.io.Serializable;
    import java.util.Arrays;
    import java.util.List;
    
    @Entity
    @Data
    public class Article implements Serializable {
        @Id
        /**
         * Description: 由数据库控制,auto是程序统一控制
         */
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        private long id;
    
    
        @Column(nullable = false, unique = true)
        @NotEmpty(message = "标题不能为空")
        private String title;
        /**
         * Description: 枚举类型
         */
        @Column(columnDefinition = "enum('图','图文','文')")
        private String type;//类型
        /**
         * Description:  Boolean类型默认false
         */
        private Boolean available = Boolean.FALSE;
        @Size(min = 0, max = 20)
        private String keyword;
        @Size(max = 255)
        private String description;
        @Column(nullable = false)
        private String body;
    
        /**
         * Description: 创建虚拟字段
         */
        @Transient
        private List keywordlists;
    
    
        public List getKeywordlists() {
            return Arrays.asList(this.keyword.trim().split("|"));
        }
    
        public void setKeywordlists( List keywordlists ) {
            this.keywordlists = keywordlists;
        }
    }

**三 运行程序**

**四 生成数据表如下**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

[https_gitee.com_cakin24_code_tree_master_08_JpaEntityDemo]: https://gitee.com/cakin24/code/tree/master/08/JpaEntityDemo
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/83b460922c114177bf38ef677412fa0a.png