有外键关联的s2sh怎么添加和更新？在线等，急。

public class EdocCategory implements java.io.Serializable {



	// Fields

	private Long id;

	private String name;

	private Set edocEntries = new HashSet(0);

public class EdocEntry implements java.io.Serializable {



	// Fields



	private Long id;

	private EdocCategory edocCategory;//其实是categoryid，参照主表（categogory表）的id列

	private String title;

	private String summary;

	private String uploaduser;

	private Date createdate;

<form action="addAction" method="post" name="form1" onsubmit="return che()">

 <table width="400" align="center" cellspacing=0 border=1 >

 <tr><td colspan="2"><h1>增加电子文档</h1></td></tr>

 <tr><td>文档名称(*)</td><td><input type="text" name="edocEntry.title"/></td></tr>

 <tr><td>文档摘要</td><td><textarea name="edocEntry.summary"/></textarea><td></tr>

 <tr><td>上传人</td><td><input type="text" name="edocEntry.uploaduser"/></td></tr>

 <tr><td>上传时间(*)</td><td><input type="text" name="edocEntry.createdate"/>(yyyy-MM-dd)</td></tr>

 <tr style="text-align:center"><td colspan="2">

 <input type="hidden" name="type" value="${edocEntry.edocCategory.id }"/>

 <input type="hidden" name="edocCategory.id" value="${edocEntry.edocCategory.id }"/>

 <input type="submit" value="提交" />