mybatis-generator 在線生成entity,dao,mapper的開源項目使用【一步一步來】

結緣

之前瞭解mybatis的時候，發現mybatis-generator好用，可以把數據庫的表通過代碼生成entity,dao和mapper,其中entity裏的字段和表一一對應。dao是一系列方法的接口類，mapper是dao的xml格式的實現，裏面主要是sql語句，如果想顯擺一下sql高超的技術，就在mapper的xml裏面多多聯繫吧，😄

 

然而翻了許多文章，發現mybatis-generator能把mysql一個數據庫的所有的表正向和逆向的映射或創建，但是oracle，卻只能一個一個創建。，而且還是代碼方式，一直想有個web項目能批量連接一個oracle庫之後批量生成entity,dao和mapper,

mybatis-generator的網頁版

終於，一個機會出現了，在這篇文章中《從零到百億互聯網金融架構發展史》瞭解了關於一個開源項目《generator-web》，學習之

 

 

本地跑起來generator-web

IDE：IDEA

JDK:1.7.0_06

Tomcat:8.0.33

其他細節參考：idea配置tomcat啓動（Maven項目）

https://blog.csdn.net/dulinanaaa/article/details/88633539

跑起來generator-web

跑起來之後長這樣

輸入一個表t_message

下載解壓之後

DAO

package com.burns.gunslite.dao;

import com.burns.gunslite.entity.MessageEntity;

public interface MessageDao {

    public int deleteByPrimaryKey(Long id);

    public int insertSelective(MessageEntity record);

    public MessageEntity selectByPrimaryKey(Long id);

    public int updateByPrimaryKeySelective(MessageEntity record);

}

entity

package com.burns.gunslite.entity;

import java.util.Date;

/**
 * @ClassName MessageEntity
 * @Description 歷史消息
 * @author 35725
 * @date 2020-02-07 14:48:52
 * @version 1.0 
 */
public class MessageEntity {

    private Long id;
    //創建人
    private Long create_by;
    //創建時間/註冊時間
    private Date create_time;
    //最後更新人
    private Long modify_by;
    //最後更新時間
    private Date modify_time;
    //消息內容
    private String content;
    //接收者
    private String receiver;
    //消息類型,0:初始,1:成功,2:失敗
    private String state;
    //模板編碼
    private String tpl_code;
    //消息類型,0:短信,1:郵件
    private String type;

    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public Long getCreate_by() {
        return create_by;
    }
    public void setCreate_by(Long create_by) {
        this.create_by = create_by;
    }
    public Date getCreate_time() {
        return create_time;
    }
    public void setCreate_time(Date create_time) {
        this.create_time = create_time;
    }
    public Long getModify_by() {
        return modify_by;
    }
    public void setModify_by(Long modify_by) {
        this.modify_by = modify_by;
    }
    public Date getModify_time() {
        return modify_time;
    }
    public void setModify_time(Date modify_time) {
        this.modify_time = modify_time;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
    public String getReceiver() {
        return receiver;
    }
    public void setReceiver(String receiver) {
        this.receiver = receiver;
    }
    public String getState() {
        return state;
    }
    public void setState(String state) {
        this.state = state;
    }
    public String getTpl_code() {
        return tpl_code;
    }
    public void setTpl_code(String tpl_code) {
        this.tpl_code = tpl_code;
    }
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }

}

mapper

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.burns.gunslite.dao.MessageDao" >
    <resultMap id="BaseResultMap" type="com.burns.gunslite.entity.MessageEntity" >
        <id column="id" property="id" jdbcType="BIGINT" />
        <result column="create_by" property="create_by" jdbcType="BIGINT" />
        <result column="create_time" property="create_time" jdbcType="TIMESTAMP" />
        <result column="modify_by" property="modify_by" jdbcType="BIGINT" />
        <result column="modify_time" property="modify_time" jdbcType="TIMESTAMP" />
        <result column="content" property="content" jdbcType="LONGVARCHAR" />
        <result column="receiver" property="receiver" jdbcType="VARCHAR" />
        <result column="state" property="state" jdbcType="VARCHAR" />
        <result column="tpl_code" property="tpl_code" jdbcType="VARCHAR" />
        <result column="type" property="type" jdbcType="VARCHAR" />
    </resultMap>

    <sql id="Base_Column_List" >
        id, create_by, create_time, modify_by, modify_time, content, receiver, state, tpl_code, 
        type
    </sql>

    <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Long" >
        select 
        <include refid="Base_Column_List" />
        from t_message
        where id = #{id,jdbcType=BIGINT}
    </select>

    <insert id="insertSelective" parameterType="com.burns.gunslite.entity.MessageEntity" >
        insert into t_message
        <trim prefix="(" suffix=")" suffixOverrides="," >
            <if test="id != null" >
                id,
            </if>
            <if test="create_by != null" >
                create_by,
            </if>
            <if test="create_time != null" >
                create_time,
            </if>
            <if test="modify_by != null" >
                modify_by,
            </if>
            <if test="modify_time != null" >
                modify_time,
            </if>
            <if test="content != null" >
                content,
            </if>
            <if test="receiver != null" >
                receiver,
            </if>
            <if test="state != null" >
                state,
            </if>
            <if test="tpl_code != null" >
                tpl_code,
            </if>
            <if test="type != null" >
                type,
            </if>
        </trim>
        <trim prefix="values (" suffix=")" suffixOverrides="," >
            <if test="id != null" >
                #{id,jdbcType=BIGINT},
            </if>
            <if test="create_by != null" >
                #{create_by,jdbcType=BIGINT},
            </if>
            <if test="create_time != null" >
                #{create_time,jdbcType=TIMESTAMP},
            </if>
            <if test="modify_by != null" >
                #{modify_by,jdbcType=BIGINT},
            </if>
            <if test="modify_time != null" >
                #{modify_time,jdbcType=TIMESTAMP},
            </if>
            <if test="content != null" >
                #{content,jdbcType=LONGVARCHAR},
            </if>
            <if test="receiver != null" >
                #{receiver,jdbcType=VARCHAR},
            </if>
            <if test="state != null" >
                #{state,jdbcType=VARCHAR},
            </if>
            <if test="tpl_code != null" >
                #{tpl_code,jdbcType=VARCHAR},
            </if>
            <if test="type != null" >
                #{type,jdbcType=VARCHAR},
            </if>
        </trim>
    </insert>

    <update id="updateByPrimaryKeySelective" parameterType="com.burns.gunslite.entity.MessageEntity" >
        update t_message
        <set >
            <if test="create_by != null" >
                create_by = #{create_by,jdbcType=BIGINT},
            </if>
            <if test="create_time != null" >
                create_time = #{create_time,jdbcType=TIMESTAMP},
            </if>
            <if test="modify_by != null" >
                modify_by = #{modify_by,jdbcType=BIGINT},
            </if>
            <if test="modify_time != null" >
                modify_time = #{modify_time,jdbcType=TIMESTAMP},
            </if>
            <if test="content != null" >
                content = #{content,jdbcType=LONGVARCHAR},
            </if>
            <if test="receiver != null" >
                receiver = #{receiver,jdbcType=VARCHAR},
            </if>
            <if test="state != null" >
                state = #{state,jdbcType=VARCHAR},
            </if>
            <if test="tpl_code != null" >
                tpl_code = #{tpl_code,jdbcType=VARCHAR},
            </if>
            <if test="type != null" >
                type = #{type,jdbcType=VARCHAR},
            </if>
        </set>
        where id = #{id,jdbcType=BIGINT}
    </update>

    <delete id="deleteByPrimaryKey" parameterType="java.lang.Long" >
        delete from t_message
        where id = #{id,jdbcType=BIGINT}
    </delete>

</mapper>

不過需要多個表下載是，需要手動添加，此處可以顯示多個表，然後根據需要可以刪除

 

 

後面會學習其中的代碼，並嘗試輸出一個 基於oracle版本的web，暫定mybatis-generator-web-oracle,哈哈，好長。。。。。。。。。。。