java代码生成

使用idea的插件codehelper.generator进行代码生成,可以根据entity,生成对应的

1、建表sql语句

2、dao.java文件

3、dao.xml文件

4、service.java文件

同时这个插件还能在new了entity之后生成所有的set方法

多次生成,不会影响自己手动添加的代码

安装

安装插件codehelper.generator

案例

@Data@AllArgsConstructor@NoArgsConstructorpublic class UserEntity { @Id private Integer id; private String name; /** * 1启用,0停用 */ private Integer state; private String remark; @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss") private Date addtime; @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss") private Date stoptime;}

生成set

UserEntity user=new UserEntity();

//new了之后在下一行:点击tool--codeHelper--GenAllSetter

生成代码

点击tool--codeHelper--tox Boxes--在弹窗中输入entity,多个使用'|'分隔,就会在当前文件夹生成代码

sql

-- auto Generated on 2020-01-14 12:49:57 -- DROP TABLE IF EXISTS `user_entity`; CREATE TABLE user_entity( `id` INTEGER(20) UNSIGNED NOT NULL AUTO_INCREMENT COMMENT 'id', `name` VARCHAR(50) NOT NULL DEFAULT '' COMMENT 'name', `state` INTEGER(12) NOT NULL DEFAULT -1 COMMENT '1启用,0停用', `remark` VARCHAR(50) NOT NULL DEFAULT '' COMMENT 'remark', `addtime` DATETIME NOT NULL DEFAULT '1000-01-01 00:00:00' COMMENT 'addtime', `stoptime` DATETIME NOT NULL DEFAULT '1000-01-01 00:00:00' COMMENT 'stoptime', PRIMARY KEY (`id`))ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT 'user_entity';

dao

package com.demo1.invoice.entity.user;import org.apache.ibatis.annotations.Param;import java.util.List;import com.demo1.invoice.entity.user.UserEntity;public interface UserEntityDao { int insert(@Param("pojo") UserEntity pojo); int insertList(@Param("pojos") List< UserEntity> pojo); List<UserEntity> select(@Param("pojo") UserEntity pojo); int update(@Param("pojo") UserEntity pojo);}

xml

<?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.demo1.invoice.entity.user.UserEntityDao"><!--auto generated Code--> <resultMap id="AllColumnMap" type="com.demo1.invoice.entity.user.UserEntity"> <result column="id" property="id"/> <result column="name" property="name"/> <result column="state" property="state"/> <result column="remark" property="remark"/> <result column="addtime" property="addtime"/> <result column="stoptime" property="stoptime"/> </resultMap><!--auto generated Code--> <sql id="all_column"> id, name, state, remark, addtime, stoptime </sql><!--auto generated Code--> <insert id="insert"> INSERT INTO user_entity <trim prefix="(" suffix=")" suffixOverrides=","> <if test="pojo.id != null"> id, </if> <if test="pojo.name != null"> name, </if> <if test="pojo.state != null"> state, </if> <if test="pojo.remark != null"> remark, </if> <if test="pojo.addtime != null"> addtime, </if> <if test="pojo.stoptime != null"> stoptime, </if> </trim> VALUES <trim prefix="(" suffix=")" suffixOverrides=","> <if test="pojo.id != null"> #{pojo.id}, </if> <if test="pojo.name != null"> #{pojo.name}, </if> <if test="pojo.state != null"> #{pojo.state}, </if> <if test="pojo.remark != null"> #{pojo.remark}, </if> <if test="pojo.addtime != null"> #{pojo.addtime}, </if> <if test="pojo.stoptime != null"> #{pojo.stoptime}, </if> </trim> </insert><!--auto generated Code--> <insert id="insertList"> INSERT INTO user_entity( <include refid="all_column"/> )VALUES <foreach collection="pojos" item="pojo" index="index" separator=","> ( #{pojo.id}, #{pojo.name}, #{pojo.state}, #{pojo.remark}, #{pojo.addtime}, #{pojo.stoptime} ) </foreach> </insert><!--auto generated Code--> <update id="update"> UPDATE user_entity <set> <if test="pojo.id != null"> id = #{pojo.id}, </if> <if test="pojo.name != null"> name = #{pojo.name}, </if> <if test="pojo.state != null"> state = #{pojo.state}, </if> <if test="pojo.remark != null"> remark = #{pojo.remark}, </if> <if test="pojo.addtime != null"> addtime = #{pojo.addtime}, </if> <if test="pojo.stoptime != null"> stoptime = #{pojo.stoptime} </if> </set> WHERE id = #{pojo.id} </update><!--auto generated Code--> <select id="select" resultMap="AllColumnMap"> SELECT <include refid="all_column"/> FROM user_entity <where> <if test="pojo.id != null"> AND id = #{pojo.id} </if> <if test="pojo.name != null"> AND name = #{pojo.name} </if> <if test="pojo.state != null"> AND state = #{pojo.state} </if> <if test="pojo.remark != null"> AND remark = #{pojo.remark} </if> <if test="pojo.addtime != null"> AND addtime = #{pojo.addtime} </if> <if test="pojo.stoptime != null"> AND stoptime = #{pojo.stoptime} </if> </where> LIMIT 1000 </select><!--auto generated Code--> <delete id="delete"> DELETE FROM user_entity where id = #{id} </delete></mapper>

service

import org.springframework.stereotype.Service;import javax.annotation.Resource;import java.util.List;import com.demo1.invoice.entity.user.UserEntity;import com.demo1.invoice.entity.user.UserEntityDao;@Servicepublic class UserEntityService { @Resource private UserEntityDao userEntityDao; public int insert(UserEntity pojo){ return userEntityDao.insert(pojo); } public int insertList(List< UserEntity> pojos){ return userEntityDao.insertList(pojos); } public List<UserEntity> select(UserEntity pojo){ return userEntityDao.select(pojo); } public int update(UserEntity pojo){ return userEntityDao.update(pojo); }}

补充知识：IDEA 新建junit单元测试

1. 新建test目录

在src同级目录下新建test文件夹，右键test文件夹设置为Test Source Root

2. 创建测试类

选中要创建单元测试的实现类，并将焦点放在编辑器中（鼠标在编辑器中点击一下），菜单栏选择Navigate----Test（Mac快捷键：Cmd+shift+t）：

选择创建新的测试：

选中要测试的方法，以及生成@Before：

这样之后就会在test下新建一个测试类：

3. 测试函数介绍

测试类中包含两个函数：

@Before

public void setUp() throws Exception

这个是测试方法执行前执行的函数，假如在测试方法中需要使用该类中的成员变量，那么可以在该函数中定义该成员变量。

@Test

public void findUserById() throws Exception

这个便是测试函数。点击编辑器左列的小工具即可发起测试。

以上这篇使用idea插件进行java代码生成的操作就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。