mybatis通常自动生成的实体是没有中文注释的，想要生成的实体有中文注释，步骤如下
 
1、数据库的自字段一定要有注释，如下图
 

 实体中的所有注释是从数据库中的注释而来
 
2、并创建实体类DefaultCommentGenerator 的class文件
 
import org.mybatis.generator.api.CommentGenerator;
 import org.mybatis.generator.api.IntrospectedColumn;
 import org.mybatis.generator.api.IntrospectedTable;
 import org.mybatis.generator.api.dom.java.*;
 import org.mybatis.generator.api.dom.xml.XmlElement;
 import org.mybatis.generator.config.MergeConstants;
 import org.mybatis.generator.config.PropertyRegistry;
 
import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.Properties;
 import java.util.Set;
 
import static org.mybatis.generator.internal.util.StringUtility.isTrue;
 
/**
 
 
mybatis generator 注释
 
 
@author Klaus Allen
 
 
@date 2018/6/15
 */
 public class DefaultCommentGenerator implements CommentGenerator {
 
private Properties properties;
 private Properties systemPro;
 private boolean suppressDate;
 private boolean suppressAllComments;
 private String currentDateStr;
 
public DefaultCommentGenerator() {
 super();
 properties = new Properties();
 systemPro = System.getProperties();
 suppressDate = false;
 suppressAllComments = false;
 currentDateStr = (new SimpleDateFormat(“yyyy-MM-dd”)).format(new Date());
 }
 
@Override
 public void addJavaFileComment(CompilationUnit compilationUnit) {
 // add no file level comments by default
 return;
 }
 
/**
 
  
Adds a suitable comment to warn users that the element was generated, and
when it was generated.
 */
 @Override
 public void addComment(XmlElement xmlElement) {
 return;
 }
 
@Override
 public void addRootComment(XmlElement rootElement) {
 // add no document level comments by default
 return;
 }
 
@Override
 public void addGeneralMethodAnnotation(Method method, IntrospectedTable introspectedTable,
 Set set) {
 
}
 
@Override
 public void addGeneralMethodAnnotation(Method method, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn, Set set) {
 
}
 
@Override
 public void addFieldAnnotation(Field field, IntrospectedTable introspectedTable, Set set) {
 
}
 
@Override
 public void addFieldAnnotation(Field field, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn, Set set) {
 
}
 
@Override
 public void addClassAnnotation(InnerClass innerClass, IntrospectedTable introspectedTable, Set set) {
 
}
 
@Override
 public void addConfigurationProperties(Properties properties) {
 this.properties.putAll(properties);
 
 suppressDate = isTrue(properties.getProperty(PropertyRegistry.COMMENT_GENERATOR_SUPPRESS_DATE));

 suppressAllComments = isTrue(properties.getProperty(PropertyRegistry.COMMENT_GENERATOR_SUPPRESS_ALL_COMMENTS));
 
}
 
/**
 
  
This method adds the custom javadoc tag for. You may do nothing if you do
not wish to include the Javadoc tag - however, if you do not include the
Javadoc tag then the Java merge capability of the eclipse plugin will
break.
@param javaElement the java element
 */
 protected void addJavadocTag(JavaElement javaElement, boolean markAsDoNotDelete) {
 javaElement.addJavaDocLine(" *");
 StringBuilder sb = new StringBuilder();
 sb.append(" * “);
 sb.append(MergeConstants.NEW_ELEMENT_TAG);
 if (markAsDoNotDelete) {
 sb.append(” do_not_delete_during_merge");
 }
 String s = getDateString();
 if (s != null) {
 sb.append(’ ');
 sb.append(s);
 }
 javaElement.addJavaDocLine(sb.toString());
 }
 
/**
 
  
This method returns a formated date string to include in the Javadoc tag
and XML comments. You may return null if you do not want the date in
these documentation elements.
@return a string representing the current timestamp, or null
 */
 protected String getDateString() {
 String result = null;
 if (!suppressDate) {
 result = currentDateStr;
 }
 return result;
 }
 
@Override
 public void addClassComment(InnerClass innerClass, IntrospectedTable introspectedTable) {
 if (suppressAllComments) {
 return;
 }
 StringBuilder sb = new StringBuilder();
 innerClass.addJavaDocLine("/**");
 sb.append(" * “);
 sb.append(introspectedTable.getFullyQualifiedTable());
 sb.append(” “);
 sb.append(getDateString());
 innerClass.addJavaDocLine(sb.toString());
 innerClass.addJavaDocLine(” */");
 }
 
@Override
 public void addEnumComment(InnerEnum innerEnum, IntrospectedTable introspectedTable) {
 if (suppressAllComments) {
 return;
 }
 
 StringBuilder sb = new StringBuilder();

 innerEnum.addJavaDocLine("/**");
 //      addJavadocTag(innerEnum, false);
 sb.append(" * ");
 sb.append(introspectedTable.getFullyQualifiedTable());
 innerEnum.addJavaDocLine(sb.toString());
 innerEnum.addJavaDocLine(" */");
 
}
 
@Override
 public void addFieldComment(Field field, IntrospectedTable introspectedTable,
 IntrospectedColumn introspectedColumn) {
 if (suppressAllComments) {
 return;
 }
 
 StringBuilder sb = new StringBuilder();

 field.addJavaDocLine("/**");
 sb.append(" * ");
 sb.append(introspectedColumn.getRemarks());
 field.addJavaDocLine(sb.toString());

 //      addJavadocTag(field, false);

 field.addJavaDocLine(" */");
 
}
 
@Override
 public void addFieldComment(Field field, IntrospectedTable introspectedTable) {
 if (suppressAllComments) {
 return;
 }
 
 StringBuilder sb = new StringBuilder();

 field.addJavaDocLine("/**");
 sb.append(" * ");
 sb.append(introspectedTable.getFullyQualifiedTable());
 field.addJavaDocLine(sb.toString());
 field.addJavaDocLine(" */");
 
}
 
@Override
 public void addModelClassComment(TopLevelClass topLevelClass, IntrospectedTable introspectedTable) {
 
}
 
@Override
 public void addGeneralMethodComment(Method method, IntrospectedTable introspectedTable) {
 if (suppressAllComments) {
 return;
 }
 // method.addJavaDocLine("/**");
 // addJavadocTag(method, false);
 // method.addJavaDocLine(" */");
 }
 
@Override
 public void addGetterComment(Method method, IntrospectedTable introspectedTable,
 IntrospectedColumn introspectedColumn) {
 if (suppressAllComments) {
 return;
 }
 
 method.addJavaDocLine("/**");

 StringBuilder sb = new StringBuilder();
 sb.append(" * ");
 sb.append(introspectedColumn.getRemarks());
 method.addJavaDocLine(sb.toString());

 sb.setLength(0);
 sb.append(" * @return ");
 sb.append(introspectedColumn.getActualColumnName());
 sb.append(" ");
 sb.append(introspectedColumn.getRemarks());
 method.addJavaDocLine(sb.toString());

 //      addJavadocTag(method, false);

 method.addJavaDocLine(" */");
 
}
 
@Override
 public void addSetterComment(Method method, IntrospectedTable introspectedTable,
 IntrospectedColumn introspectedColumn) {
 if (suppressAllComments) {
 return;
 }
 
 method.addJavaDocLine("/**");
 StringBuilder sb = new StringBuilder();
 sb.append(" * ");
 sb.append(introspectedColumn.getRemarks());
 method.addJavaDocLine(sb.toString());

 Parameter parm = method.getParameters().get(0);
 sb.setLength(0);
 sb.append(" * @param ");
 sb.append(parm.getName());
 sb.append(" ");
 sb.append(introspectedColumn.getRemarks());
 method.addJavaDocLine(sb.toString());

 //      addJavadocTag(method, false);

 method.addJavaDocLine(" */");
 
}
 
@Override
 public void addClassComment(InnerClass innerClass, IntrospectedTable introspectedTable, boolean markAsDoNotDelete) {
 if (suppressAllComments) {
 return;
 }
 
 StringBuilder sb = new StringBuilder();

 innerClass.addJavaDocLine("/**");
 sb.append(" * ");
 sb.append(introspectedTable.getFullyQualifiedTable());
 innerClass.addJavaDocLine(sb.toString());

 sb.setLength(0);
 sb.append(" * @author ");
 sb.append(systemPro.getProperty("user.name"));
 sb.append(" ");
 sb.append(currentDateStr);

 //      addJavadocTag(innerClass, markAsDoNotDelete);

 innerClass.addJavaDocLine(" */");
 
}
 }
 
 
3、修改mybatis-generator-core包中的文件，把编译好的class文件放入jar对就的路径中，建路径一定不能错:org/mybatis/generator/internal/DefaultCommentGenerator.java
 package org.mybatis.generator.internal;
 4、修改generatorConfig.xml和其它配制文件
 
部分截图如下
 
 
生成结果如下
 
 
不废话了，直接上代码，有兴趣的同学可以好好研究下
 
https://gitee.com/xing_xin/test.git
 

https://blog.csdn.net/mytt_10566/article/details/78505719
 
https://www.cnblogs.com/xiqinfanqie/p/6276832.html