0
嗨朋友，我正在開發一個使用hibernate和struts2的Web應用程序。我正在創建相冊，我成功完成了使用hibernate的工作，但是，在休眠時，插入到數據庫時出現問題。這個模塊就像這樣工作，只要文件上傳它將插入文件名，內容類型，id和它假設插入圖像文件（字節[]）內容，但它顯示空值表中..我的代碼是這樣的...如何在POJO類的setter方法[會話文件上傳應用程序] Hibernate和struts 2中調用另一個方法
@Entity
@Table(name="PHOTOALBUM")
public class User implements Serializable {
@Id
@GeneratedValue
@Column(name="PHOTO_ID")
private Long id;
@Column(name="IMAGE")
private byte[] Image;
@Column(name="CONTENT_TYPE")
private String userImageContentType;
@Column(name="PHOTO_NAME")
private String userImageFileName;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getUserImageFileName() {
return userImageFileName;
}
public void setUserImageFileName(String userImageFileName) {
this.userImageFileName = userImageFileName;
}
public String getUserImageContentType() {
return userImageContentType;
}
public void setUserImageContentType(String userImageContentType) {
this.userImageContentType = userImageContentType;
}
public byte[] getImage() {
return Image;
}
public void setImage(byte[] Image) {
Image=Change(this.getUserImage());
this.Image = Image;
}
@Transient
private File userImage;
public File getUserImage() {
return userImage;
}
public void setUserImage(File userImage) {
this.userImage = userImage;
}
public byte[] Change(File userImage)
{
// userImage=this.getUserImage();
// String name=userImage.getName();
// long len=userImage.length();
byte[] bFile = new byte[(int) userImage.length()];
try {
FileInputStream fileInputStream = new FileInputStream(userImage);
fileInputStream.read(bFile);
fileInputStream.close();
}
catch(Exception e)
{
e.printStackTrace();
}
// System.out.println("The Name Of File In Pojo Class Is:="+ name);
//System.out.println("The Length Of File In Pojo Class Is:="+ len);
//System.out.println("The Content Of File In Pojo Class Is:="+ bFile);
return bFile;
}
}
，我保存的值這樣
public class UserDAOImpl implements UserDAO {
@SessionTarget
Session session;
@TransactionTarget
Transaction transaction;
/**
* Used to save or update a user.
*/
@Override
public void saveOrUpdateUser(User user) {
try {
session.saveOrUpdate(user);
} catch (Exception e) {
transaction.rollback();
e.printStackTrace();
}
}
/**
* Used to delete a user.
*/
@Override
public void deleteUser(Long userId) {
try {
User user = (User) session.get(User.class, userId);
session.delete(user);
} catch (Exception e) {
transaction.rollback();
e.printStackTrace();
}
}
/**
* Used to list all the users.
*/
@SuppressWarnings("unchecked")
@Override
public List<User> listUser() {
List<User> courses = null;
try {
courses = session.createQuery("from User").list();
} catch (Exception e) {
e.printStackTrace();
}
return courses;
}
/**
* Used to list a single user by Id.
*/
@Override
public User listUserById(Long userId) {
User user = null;
try {
user = (User) session.get(User.class, userId);
} catch (Exception e) {
e.printStackTrace();
}
return user;
}
}
Struts動作映射是這樣的......
\<package name="default" extends="hibernate-default">
<action name="saveOrUpdateUser"method="saveOrUpdate"class="com.srikanth.web.UserAction">
<result name="success" type="redirect">listUser</result>
</action>
<action name="listUser" method="list" class="com.srikanth.web.UserAction">
<result name="success">/register.jsp</result>
</action>
<action name="editUser" method="edit" class="com.srikanth.web.UserAction">
<result name="success">/register.jsp</result>
</action>
<action name="deleteUser" method="delete" class="com.srikanth.web.UserAction">
<result name="success" type="redirect">listUser</result>
</action>
</package>
和我的JSP是這樣
\<s:form action="saveOrUpdateUser">
<s:push value="user">
<s:hidden name="id" />
<s:file name="userImage" label="User Image" />
<s:submit />
</s:push>
</s:form>
<s:iterator value="userList" status="userStatus">
<s:property value="id" />
<s:property value="userImageFileName" />
<s:property value="userImageContentType" />
<img src='<s:property value="userImage" />' alt"" />
<s:url id="deleteURL" action="deleteUser">
<s:param name="id" value="%{id}"></s:param>
</s:url> <s:a href="%{deleteURL}">Delete</s:a>
</s:iterator>
我試圖調用的方法更改，以便它使用二傳手轉換爲byte []的文件，並將其存儲在一個字節[]圖像變量，但它不工作.... 所以，請幫助我與這一個..... 在此先感謝