How to get attribute comments in java class

package ;

import ;
import ;
import ;

import ;
import ;
import ;

/**
  * Mail and other message sending history table
  *
  * @author xxxx
  */
@Entity
@Table(name = "T_messageHistory")
@Data
@EqualsAndHashCode(callSuper=true)
public class MessageHistory extends BaseModel {

    /**
      * Factory id
      */
    @Column(name = "factoryId")
    private String factoryId;

    /**
      * Original messageId
      */
    @Column(name = "messageId")
    private String messageId;

    /**
      * Receiver
      */
    @Column(name = "receiver")
    private String receiver;

    /**
      * cc sender
      */
    @Column(name = "copy")
    private String copy;

    /**
      * Title
      */
    @Column(name = "subject")
    private String subject;

    /**
      * content
      */
    @Column(name = "content", columnDefinition = "nvarchar(2000)")
    private String content;

    /**
      * Send type
      */
    @Column(name = "sendType")
    private String sendType;
}

        <dependency>
            <groupId></groupId>
            <artifactId>tools</artifactId>
            <scope>system</scope>
            <systemPath>${}/</systemPath>
        </dependency>

package ;

import ;
import ;
import ;
import ;
import ;
import org.;
import org.;

import ;

/**
  * Get the comments corresponding to properties in a certain java file code
  *
  * @author guzt
  */
public class Doclet {

    public static Logger logger = ();

    private static RootDoc rootDoc;
    private String javaBeanFilePath;

    public static boolean start(RootDoc root) {
        rootDoc = root;
        return true;
    }

    public Doclet(String javaBeanFilePath) {
         = javaBeanFilePath;
    }

    public ModelClassDocVO exec() {
        ModelClassDocVO modelClassDocVO = new ModelClassDocVO();
        (new String[]{"-doclet", (), "-docletpath",
                ("/").getPath(), "-encoding", "utf-8", javaBeanFilePath});
        ClassDoc[] classes = ();

        if (classes == null ||  == 0) {
            (javaBeanFilePath + "No ClassDoc information");
            return modelClassDocVO;
        }

        List<FildEntry> entrys = ();
        ClassDoc classDoc = classes[0];
        // Get the name of the class        (());
        // Get the comments of the class        String classComment = (classDoc, "documentation").toString();
        String spitStr = "\n";
        for (String msg : (spitStr)) {
            if (!().startsWith("@") && ().length() > 0) {
                (msg);
                break;
            }
        }
        // Get the attribute name and comment        FieldDoc[] fields = (false);
        for (FieldDoc field : fields) {
            (new FildEntry((), ().typeName(), ()));
        }

        (entrys);
        return modelClassDocVO;
    }

     // Test it    public static void main(String[] args) {
        Doclet doclet = new Doclet(
                "E:\\IDEA_HOME\\middol\\parent\\message\\src\\main\\java\\com\\middol\\message\\model\\");
        ModelClassDocVO modelClassDocVO = ();
        ("Class Comments:" + ());
        ("Attribute field comments are as follows:");
        ().forEach(::println);
    }
}

package ;

/**
  * The corresponding comments for attribute fields
  *
  * @author guzt
  */
public class FildEntry {

    /**
      * Parameter name
      */
    private String fName;
    /**
      * type
      */
    private String fType;
    /**
      * illustrate
      */
    private String fExplain;

    public FildEntry(String fName, String fType, String fExplain) {
        super();
         = fName;
         = fType;
         = fExplain;
    }

    @Override
    public String toString() {
        return "Entry{" +
                "fName='" + fName + '\'' +
                ", fType='" + fType + '\'' +
                ", fExplain='" + fExplain + '\'' +
                '}';
    }

    public String getfName() {
        return fName;
    }

    public void setfName(String fName) {
         = fName;
    }

    public String getfType() {
        return fType;
    }

    public void setfType(String fType) {
         = fType;
    }

    public String getfExplain() {
        return fExplain;
    }

    public void setfExplain(String fExplain) {
         = fExplain;
    }
}

package ;

import ;

/**
  * Model class field comment
  * @author guzt
  */
public class ModelClassDocVO {


    private String modelTableName;

    private String modelClassName;

    private String modelCommentText;

    private List<FildEntry> fildEntryList;


    public String getModelTableName() {
        return modelTableName;
    }

    public void setModelTableName(String modelTableName) {
         = modelTableName;
    }

    public String getModelClassName() {
        return modelClassName;
    }

    public void setModelClassName(String modelClassName) {
         = modelClassName;
    }

    public String getModelCommentText() {
        return modelCommentText;
    }

    public void setModelCommentText(String modelCommentText) {
         = modelCommentText;
    }

    public List<FildEntry> getFildEntryList() {
        return fildEntryList;
    }

    public void setFildEntryList(List<FildEntry> fildEntryList) {
         = fildEntryList;
    }

    @Override
    public String toString() {
        return "ModelClassDocVO{" +
                "modelClassName='" + modelClassName + '\'' +
                ", modelCommentText='" + modelCommentText + '\'' +
                ", fildEntryList=" + fildEntryList +
                '}';
    }
}