MyBatis-generator生成的实体带注释

深碍√TFBOYSˉ_ 2024-03-25 16:47 15阅读 0赞

在 [Gradle项目使用MyBatis-generator自动生成MyBatis映射代码][Gradle_MyBatis-generator_MyBatis] 知道了如何生成对应代码，但是还有个问题，生成的实体类并没有带上注释，改如何处理：

### 方法1： 自定义 ###

#### CustomerCommentGenerator ####

import org.mybatis.generator.api.IntrospectedColumn;
    import org.mybatis.generator.api.IntrospectedTable;
    import org.mybatis.generator.internal.DefaultCommentGenerator;
    import org.mybatis.generator.api.dom.java.Field;
    import org.mybatis.generator.api.dom.java.InnerClass;
    import org.mybatis.generator.api.dom.java.Method;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    import java.util.Properties;
    
    /**
     * mybatis generator生成注释插件
     */
    public class CustomerCommentGenerator extends DefaultCommentGenerator {
        private Properties properties;
        private Properties systemPro;
        private boolean suppressDate;
        private boolean suppressAllComments;
        private String currentDateStr;
        private String currentTimeStr;
    
        public CustomerCommentGenerator() {
            super();
            properties = new Properties();
            systemPro = System.getProperties();
            suppressDate = false;
            suppressAllComments = false;
            currentDateStr = (new SimpleDateFormat("yyyy-MM-dd")).format(new Date());
            currentTimeStr = (new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")).format(new Date());
        }
    
    
        /**
         *  添加字段注释，主要是处理这个
         */
        public void addFieldComment(Field field, IntrospectedTable introspectedTable,
                IntrospectedColumn introspectedColumn) {
            if (suppressAllComments) {
                return;
            }
            field.addJavaDocLine("/** " + introspectedColumn.getRemarks()  + " */");
        }
    
        public void addFieldComment(Field field, IntrospectedTable introspectedTable) {
    
        }
    
        public void addGeneralMethodComment(Method method, IntrospectedTable introspectedTable) {
    
        }
    
        public void addGetterComment(Method method, IntrospectedTable introspectedTable,
                IntrospectedColumn introspectedColumn) {
    
        }
    
        public void addSetterComment(Method method, IntrospectedTable introspectedTable,
                IntrospectedColumn introspectedColumn) {
    
        }
    
        public void addClassComment(InnerClass innerClass, IntrospectedTable introspectedTable, boolean markAsDoNotDelete) {
    
        }
    
        public void addClassComment(InnerClass innerClass, IntrospectedTable introspectedTable) {
        }
    
    }

#### 配置： ####

<property name="javaFileEncoding" value="UTF-8"/>
    
     
        <commentGenerator  type="com.report.mybatisGenerate.CustomerCommentGenerator">
            
            <property name="suppressAllComments" value="false"/>
            <property name="suppressDate" value="true"/>
        </commentGenerator>

因为mybasis-generate插件的问题，自定义的，直接用

mbGrenerator 会报错。

![4c583fb399bf4ebaa74a769316f02276.png][]

因此改用main方法进行处理：

#### MyBatisGenerator ####

import org.mybatis.generator.config.Configuration;
    import org.mybatis.generator.config.xml.ConfigurationParser;
    import org.mybatis.generator.internal.DefaultShellCallback;
    import java.io.InputStream;
    import java.util.ArrayList;
    import java.util.List;
    
    
    public class MyBatisGenerator {
    
        public static void main(String[] args) throws Exception {
            MyBatisGenerator customer = new MyBatisGenerator();
    
            System.out.println(customer.getClass().getResource("/").getPath());
            customer.generator();
        }
    
        private void generator() throws Exception {
            List<String> warnings = new ArrayList<>();
            InputStream resourceAsStream = this.getClass().getClassLoader().getResourceAsStream("generatorConfigMb.xml");
            ConfigurationParser cp = new ConfigurationParser(warnings);
            Configuration config = cp.parseConfiguration(resourceAsStream);
            DefaultShellCallback callback = new DefaultShellCallback(true);
            org.mybatis.generator.api.MyBatisGenerator myBatisGenerator = new org.mybatis.generator.api.MyBatisGenerator(config, callback, warnings);
            myBatisGenerator.generate(null);
        }
    }

#### 效果： ####

![8da430d700c649a784a26bd5b59e1ae8.png][]

### 方法2：反编译逆向工程源码后修改DefaultCommentGenerator类 ###

这个同自定义，反编译逆向工程源码后修改DefaultCommentGenerator类里面addFieldComment方法

public void addFieldComment(Field field, IntrospectedTable introspectedTable,
                IntrospectedColumn introspectedColumn) {
            if (suppressAllComments) {
                return;
            }
            field.addJavaDocLine("/** " + introspectedColumn.getRemarks()  + " */");
        }

然后修改版本号，再上传。

这样的好处就是可以直接点击 mbGrenerator 按钮生成。

### 总结： ###

第一种方式比较常用，也方便。第二种方式更适合本地用。生成了注释就比较方便，不用手动加。

[Gradle_MyBatis-generator_MyBatis]: https://blog.csdn.net/qq_35461948/article/details/111629848
[4c583fb399bf4ebaa74a769316f02276.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/dcc2de10cdcd484d84c78703bcacf631.png
[8da430d700c649a784a26bd5b59e1ae8.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/edc63b83fa37443e8f2daeb78fa75f51.png