hibernate主表保存从表保存不了,该如何处理

hibernate主保存从表保存不了,该如何处理 hibernate主表保存从表保存不了 主表配置 ?xml version= 1.0 ? !DOCTYPE hibernate-mapping PUBLIC -//Hibernate/Hibernate Mapping DTD 2.0//EN hibernate-mapping class name= notes.po.NotesPO table= OA_NOTES schema= OFFICE id name= notesID type= java.lang.String column= NOTESID generator class= assigned / /id property name= notesTitle type= java.lang.String column= NOTESTITLE length= 200 / set name= notesMsg table= OA_NOTESMSG lazy= true inverse= false cascade= all key column= NOTESID / one-to-many class= notes.po.NotesMsgPO / /set /class /hibernate-mapping 从表配置 ?xml version= 1.0 ? !DOCTYPE hibernate-mapping PUBLIC -//Hibernate/Hibernate Mapping DTD 2.0//EN hibernate-mapping !-- Created by the Middlegen Hibernate plugin ://hibernate.sourceforge.net/ -- class name= notes.po.NotesMsgPO table= OA_NOTESMSG schema= OFFICE id name= msgID type= java.lang.String column= MSGID generator class= assigned / /id property name= userName type= java.lang.String column= USERNAME length= 100 / many-to-one name= notes class= notes.po.NotesPO column= NOTESID insert= true update= true / /class /hibernate-mapping 主表实体 public class NotesPO implements Serializable { private String notesID; private String notesTitle; private Set notesMsg = new HashSet(); public NotesPO() { } public String getNotesID() { return this.notesID; } public String getNotesTitle() { return this.notesTitle; } public Set getNotesMsg() { return this.notesMsg; } public void setNotesID(String notesID) { this.notesID = notesID; } public void setNotesTitle(String notesTitle) { this.notesTitle = notesTitle; } public void setNotesMsg(Set notesMsg) { this.notesMsg = notesMsg; } public boolean equals(Object other) { if (!(other instanceof NotesPO)) { return false; } NotesPO castOther = (NotesPO) other; return new EqualsBuilder().append(getNotesID(), castOther.getNotesID()) .isEquals(); } public int hashCode() { return new HashCodeBuilder().append(getNotesID()).toHashCode(); } public String toString() { return new ToStringBuilder(this).append( notesID , getNotesID()) .toString(); } } 从表实体 public class NotesMsgPO implements Serializable { private String msgID; private String userName; private NotesPO notes; public NotesMsgPO() { } public String getMsgID() { return this.msgID; } public String getUserName() { return this.userName; } public NotesPO getNotes() {