一、依赖

    org.mybatis.generator
    mybatis-generator-core
    1.3.7


    mysql
    mysql-connector-java
    8.0.15


    org.mybatis
    mybatis
    3.4.0

二、配置

1. generatorConfig.xml

<?xml version="1.0" encoding="UTF-8"?>



    
    
        
        
        
        
        
        
        
        
        
        
        
            
            
            
            
        
        
        
            
            
        
        
        
        
        
        
        
        
        
    

2. generator.properties

jdbc.driverClass=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db01?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai&useSSL=false
jdbc.userId=root
jdbc.password=123456

三、自定义实现类

public class CommentGenerator extends DefaultCommentGenerator {
    private boolean addRemarkComments = false;
    private static final String EXAMPLE_SUFFIX="Example";
//    private static final String API_MODEL_PROPERTY_FULL_CLASS_NAME="io.swagger.annotations.ApiModelProperty";

    /**
     * 设置用户配置的参数
     */
    @Override
    public void addConfigurationProperties(Properties properties) {
        super.addConfigurationProperties(properties);
        this.addRemarkComments = StringUtility.isTrue(properties.getProperty("addRemarkComments"));
    }

    /**
     * 给字段添加注释
     */
    @Override
    public void addFieldComment(Field field, IntrospectedTable introspectedTable,
                                IntrospectedColumn introspectedColumn) {
        String remarks = introspectedColumn.getRemarks();
        //根据参数和备注信息判断是否添加备注信息
        if(addRemarkComments&&StringUtility.stringHasValue(remarks)){
            //数据库中特殊字符需要转义
            if(remarks.contains("\"")){
                remarks = remarks.replace("\"","'");
            }
            addFieldJavaDoc(field, remarks);
//            //给model的字段添加swagger注解
//            field.addJavaDocLine("@ApiModelProperty(value = \""+remarks+"\")");
        }
    }

    /**
     * 给model的字段添加注释
     */
    private void addFieldJavaDoc(Field field, String remarks) {
        field.addJavaDocLine("//"+ remarks);
    }

    @Override
    public void addJavaFileComment(CompilationUnit compilationUnit) {
        super.addJavaFileComment(compilationUnit);
        //只在model中添加swagger注解类的导入
//        if(!compilationUnit.isJavaInterface()&&!compilationUnit.getType().getFullyQualifiedName().contains(EXAMPLE_SUFFIX)){
//            compilationUnit.addImportedType(new FullyQualifiedJavaType(API_MODEL_PROPERTY_FULL_CLASS_NAME));
//        }
    }
}

四、代码生成入口

public class Generator {
    public static void main(String[] args) throws Exception {
        //MBG 执行过程中的警告信息
        List warnings = new ArrayList();
        //当生成的代码重复时，覆盖原代码
        boolean overwrite = true;
        //读取我们的 MBG 配置文件
        InputStream is = Generator.class.getResourceAsStream("/generatorConfig.xml");
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(is);
        is.close();

        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        //创建 MBG
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
        //执行生成代码
        myBatisGenerator.generate(null);
        //输出警告信息
        for (String warning : warnings) {
            System.out.println(warning);
        }
    }
}

五、补充

添加支持sqlserver库javabean对象属性上添加注释(上面贴出的代码是不支持的)的相关代码，源码地址: https://gitee.com/junlin1991/mybatis-generator