免费Java在线代码生成器（已开源，全网最强，界面美观，功能丰富）

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一、在线地址 https://chat.tool4j.com

Java在线代码生成器：在线访问

二、页面截图

三、核心功能

支持Mybatis、MybatisPlus、Jpa代码生成
使用 antlr4 解析SQL语句，保证了SQL解析的成功率
支持自定义包名、作者名信息
支持自定义方法名、接口地址
支持自定义选择是否生成某个方法
支持选择是否集成Swagger、Lombok、validation等依赖

四、技术介绍

前端： React 16.8.6、Ant-design 4.24.12、Umi 3.5.41

后端： Java 1.8、SpringBoot2.3.4.RELEASE、knife4j（Swagger）2.0.9、Freemarker 2.3.31

五、源码

前端： tool4j-generator-ui

后台： tool4j-generator

部分代码节选：

 / * 代码生成入口类 * * @param params * @return */ public Map<String, Object> generate(JavaCodeConfig params) { 
    /* 生成代码 */ List<ParserResult> results = execute(params); Map<String, Object> map = new HashMap<>(); map.put("results", results); TreeVO root; root = new TreeVO().setKey(params.getBasePackage()).setTitle(params.getBasePackage()); String basePath = params.getBasePackage().replace(".", "/") + "/"; for (ParserResult parserResult : results) { 
    String[] dirArr = parserResult.getFileName().replace(basePath, "").split("/"); buildFileTree(root, dirArr, 0); } map.put("fileTree", root); if (CollUtil.isEmpty(results)) { 
    log.error("SQL解析失败，建议您切换SQL解析器重试，Input = {}", params.getInput()); throw new IllegalArgumentException("SQL解析失败，建议您切换SQL解析器重试"); } if (results.stream().anyMatch(ParserResult::isErrored)) { 
    List<ParserResult> errors = results.stream().filter(ParserResult::isErrored).collect(Collectors.toList()); log.info(">>>>>>>>>>>>>>> generate code exists error: total={}, error={}，Input = {}", results.size(), errors.size(), params.getInput()); } else { 
    log.info(">>>>>>>>>>>>>>> generate code all succeed."); } return map; }

import React, { 
    Component } from 'react'; import { 
    Divider, Input, Modal, Radio, Spin, Switch, Tag } from 'antd'; import styles from './GenerateModal.less'; import MethodSetting from '@/pages/components/MethodSetting'; const ORM_TYPE = { 
    jpa: { 
    label: 'JPA', color: '#', }, mybatis: { 
    label: 'Mybatis', color: '#f6b305', }, mybatisPlus: { 
    label: 'MybatisPlus', color: '#008585', }, }; class GenerateModal extends Component { 
    constructor (props) { 
    super(props); this.state = { 
    init: false, parserType: 'common', basePackage: 'com.tool4j', author: 'system', apiPathPrefix: '/api', tableNamePrefix: '', restType: 'restful', ormType: 'mybatisPlus', methods: { 
    findPage: { 
    label: '分页查询', name: 'findPage', apiPath: '/findPage', enabled: true, }, findList: { 
    label: '列表查询', name: 'findList', apiPath: '/findList', enabled: true, }, findById: { 
    label: '查询详情', name: 'findById', apiPath: '/{id}', enabled: true, }, save: { 
    label: '新增', name: 'insert', apiPath: '', enabled: true, }, update: { 
    label: '修改', name: 'update', apiPath: '', enabled: true, }, delete: { 
    label: '删除', name: 'delete', apiPath: '/{id}', enabled: true, }, }, dependencies: ['lombok', 'swagger', 'validator'], }; } cancel = () => { 
    this.props.cancel(); }; generate = () => { 
    const { 
    parserType, basePackage, author, apiPathPrefix, tableNamePrefix, restType, ormType, methods, dependencies, } = this.state; const generateConfig = { 
    parserType, basePackage, author, apiPathPrefix, tableNamePrefix, restType, ormType, methods, dependencies, }; this.props.submit(generateConfig); }; dependencyChange = (key, checked) => { 
    let { 
    dependencies = [] } = this.state; if (checked) { 
    dependencies.push(key); } else { 
    dependencies = dependencies.filter(item => item !== key); } this.setState({ 
    dependencies, }); }; formChange = (key, value) => { 
    this.setState({ 
    [key]: value, }); }; init = () => { 
    const setting = this.props.setting; if (setting) { 
    const { 
    methods } = this.state; if (setting.methods) { 
    for (let key in methods) { 
    methods[key] = { 
    ...methods[key], ...setting.methods[key] }; } } this.setState({ 
    ...setting, methods, init: true, }); } }; render () { 
    const { 
    init, dependencies = [], ormType } = this.state; if (!init) { 
    this.init(); } let { 
    templates = [] } = this.props; if (ormType) { 
    templates = templates.filter(item => item.ormType === ormType); } const templateOptions = []; templates.forEach(template => templateOptions.push({ 
    value: template.ormType, label: <div> <Tag style={ 
   { 
    marginLeft: '5px' }} color={ 
   ORM_TYPE[template.ormType].color}> { 
   ORM_TYPE[template.ormType].label} </Tag> </div>, })); return <Modal title={ 
    <div style={ 
   { 
    display: 'flex', justifyContent: 'space-between', alignItems: 'center', height: '14px', marginRight: '40px', }}> <div> <span>代码生成配置</span> </div> </div> } bodyStyle={ 
   { 
    padding: '5px' }} open={ 
   this.props.visible} maskClosable={ 
   false} onOk={ 
   this.generate} okText={ 
   '生成'} onCancel={ 
   this.cancel} cancelText={ 
   '取消'} width={ 
   '800px'} > <Spin spinning={ 
   this.props.loading} tip={ 
   '代码生成中，请稍候...'}> <div className={ 
   styles['module']}> <div style={ 
   { 
    marginBottom: '10px' }}> <Divider type='vertical' className={ 
   styles['divider']} > </Divider> <span style={ 
   { 
    fontSize: '16px', fontWeight: 600 }}>选择解析器</span> </div> <div style={ 
   { 
    marginLeft: '20px', display: 'flex' }}> <Radio.Group value={ 
   this.state.parserType} onChange={ 
   e => this.formChange('parserType', e.target.value)}> <Radio.Button value='common'>智能SQL解析器</Radio.Button> <Radio.Button value='mysql'>MySQL 解析器</Radio.Button> <Radio.Button value='postgresql'>Postgresql 解析器</Radio.Button> <Radio.Button value='plsql'>Oracle 解析器</Radio.Button> </Radio.Group> </div> </div> <div className={ 
   styles['module']}> <div style={ 
   { 
    marginBottom: '10px' }}> <Divider type='vertical' className={ 
   styles['divider']} > </Divider> <span style={ 
   { 
    fontSize: '16px', fontWeight: 600 }}>基础配置</span> </div> <div style={ 
   { 
    marginLeft: '20px' }}> <Input placeholder={ 
   '统一包名，如：com.tool4j'} addonBefore={ 
   <div style={ 
   { 
    width: '100px' }}>包名：</div>} style={ 
   { 
    marginTop: '5px', width: '60%' }} onChange={ 
   e => this.formChange('basePackage', e.target.value)} value={ 
   this.state.basePackage} /> <Input placeholder={ 
   '作者姓名，如：system'} addonBefore={ 
   <div style={ 
   { 
    width: '100px' }}>作者：</div>} style={ 
   { 
    marginTop: '5px', width: '60%' }} onChange={ 
   e => this.formChange('author', e.target.value)} value={ 
   this.state.author} /> <Input placeholder={ 
   '统一的接口前缀，如：/api'} addonBefore={ 
   <div style={ 
   { 
    width: '100px' }}>接口前缀：</div>} style={ 
   { 
    marginTop: '5px', width: '60%' }} onChange={ 
   e => this.formChange('apiPathPrefix', e.target.value)} value={ 
   this.state.apiPathPrefix} /> <Input placeholder={ 
   '生成代码时可忽略表的统一前缀，如：t_'} addonBefore={ 
   <div style={ 
   { 
    width: '100px' }}>忽略表前缀：</div>} style={ 
   { 
    marginTop: '5px', width: '60%' }} onChange={ 
   e => this.formChange('tableNamePrefix', e.target.value)} value={ 
   this.state.tableNamePrefix} /> </div> </div> <div className={ 
   styles['module']}> <div style={ 
   { 
    marginBottom: '10px' }}> <Divider type='vertical' className={ 
   styles['divider']} > </Divider> <span style={ 
   { 
    fontSize: '16px', fontWeight: 600 }}>方法配置</span> </div> <div style={ 
   { 
    width: '100%' }}> <MethodSetting methods={ 
   this.state.methods} formChange={ 
   this.formChange} /> </div> </div> <div className={ 
   styles['module']}> <div style={ 
   { 
    marginBottom: '10px' }}> <Divider type='vertical' className={ 
   styles['divider']} > </Divider> <span style={ 
   { 
    fontSize: '16px', fontWeight: 600 }}>更多选项</span> </div> <div> <div style={ 
   { 
    margin: '20px', display: 'flex', textAlign: 'left' }}> <div style={ 
   { 
    width: '120px', fontSize: '15px', fontWeight: 600 }}>ORM框架：</div> <Radio.Group onChange={ 
   e => this.formChange('ormType', e.target.value)} value={ 
   this.state.ormType}> <Radio value={ 
   'mybatisPlus'}>MybatisPlus</Radio> <Radio value={ 
   'mybatis'}>Mybatis</Radio> <Radio value={ 
   'jpa'}>SpringData（JPA）</Radio> </Radio.Group> </div> </div> </div> <div className={ 
   styles['module']}> <div> <div style={ 
   { 
    marginBottom: '10px' }}> <Divider type='vertical' className={ 
   styles['divider']} > </Divider> <span style={ 
   { 
    fontSize: '16px', fontWeight: 600 }}>集成依赖</span> </div> <div style={ 
   { 
    width: '100%', padding: '20px 40px', display: 'flex', justifyContent: 'space-between' }}> <div style={ 
   { 
    textAlign: 'center' }}> <div style={ 
   { 
    height: '60px' }}> <img src={ 
   '/icon/swagger.svg'} width={ 
   180} style={ 
   { 
    margin: '0 5px 5px 5px' }} /> </div> <Switch style={ 
   { 
    width: '60px', marginTop: '10px' }} checkedChildren='使用' unCheckedChildren='移除' checked={ 
   dependencies.filter(item => item === 'swagger').length > 0} onChange={ 
   checked => this.dependencyChange('swagger', checked)} > </Switch> </div> <div style={ 
   { 
    textAlign: 'center' }}> <div style={ 
   { 
    height: '60px', fontSize: '40px', fontFamily: 'Georgia', }}> Lombok </div> <Switch style={ 
   { 
    width: '60px', marginTop: '10px' }} checkedChildren='使用' unCheckedChildren='移除' checked={ 
   dependencies.filter(item => item === 'lombok').length > 0} onChange={ 
   checked => this.dependencyChange('lombok', checked)} > </Switch> </div> <div style={ 
   { 
    textAlign: 'center' }}> <div style={ 
   { 
    width: '100%', height: '60px', display: 'flex', flexDirection: 'column', justifyContent: 'center', }}> <div style={ 
   { 
    height: '60px', fontSize: '40px', fontFamily: 'Georgia', }}> Validation 校验 </div> </div> <Switch style={ 
   { 
    width: '60px', marginTop: '10px' }} checkedChildren='使用' unCheckedChildren='移除' checked={ 
   dependencies.filter(item => item === 'validator').length > 0} onChange={ 
   checked => this.dependencyChange('validator', checked)} > </Switch> </div> </div> </div> </div> </Spin> </Modal>; } } export default GenerateModal;

六、本地运行

可直接 clone 该项目到本地，无需修改任何内容即可运行

后端：

使用Maven安装依赖
运行 Tool4jGeneratorApplication.java

前端：
3. 切换到前端工程根目录
4. 安装依赖： npm i
5. 运行：umi dev

七、结束语

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