Hibernate怎样使用Annotation映射视图

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Hibernate怎样使用Annotation映射视图0

最近的项目中有几种用户，用户的字段差别极大，只有id、username、password、userType、name等几个相同的字段，现想做单点登录，采用视图方式，现在针对上面几个字段创建了一个普通视图，命名为View_User，没有主键。

然后用MyEclipse的反射工程生成Annotation配置的实体类，共生成两个实体类，如下：

ViewUser类

package com.ninemax.cul.user.entity;

import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.Column;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
import javax.persistence.Table;

/**
 * ViewUser entity. @author MyEclipse Persistence Tools
 */
@Entity
@Table(name = "VIEW_USER")
public class ViewUser implements java.io.Serializable {

	// Fields

	private ViewUserId id;

	// Constructors

	/** default constructor */
	public ViewUser() {
	}

	/** full constructor */
	public ViewUser(ViewUserId id) {
		this.id = id;
	}

	// Property accessors
	@EmbeddedId
	@AttributeOverrides({
			@AttributeOverride(name = "id", column = @Column(name = "ID", length = 50)),
			@AttributeOverride(name = "username", column = @Column(name = "USERNAME", length = 32)),
			@AttributeOverride(name = "password", column = @Column(name = "PASSWORD", length = 32)),
			@AttributeOverride(name = "userType", column = @Column(name = "USER_TYPE")),
			@AttributeOverride(name = "name", column = @Column(name = "NAME", length = 65536)),
			@AttributeOverride(name = "isWorkFlag", column = @Column(name = "IS_WORK_FLAG")) })
	public ViewUserId getId() {
		return this.id;
	}

	public void setId(ViewUserId id) {
		this.id = id;
	}

}

另外一个类是ViewUserId类：

package com.ninemax.cul.user.entity;

import javax.persistence.Column;
import javax.persistence.Embeddable;

/**
 * ViewUserId entity. @author MyEclipse Persistence Tools
 */
@Embeddable
public class ViewUserId implements java.io.Serializable {

	// Fields

	private String id;
	private String username;
	private String password;
	private Integer userType;
	private String name;
	private Boolean isWorkFlag;

	// Constructors

	/** default constructor */
	public ViewUserId() {
	}

	/** full constructor */
	public ViewUserId(String id, String username, String password,
			Integer userType, String name, Boolean isWorkFlag) {
		this.id = id;
		this.username = username;
		this.password = password;
		this.userType = userType;
		this.name = name;
		this.isWorkFlag = isWorkFlag;
	}

	// Property accessors

	@Column(name = "ID", length = 50)
	public String getId() {
		return this.id;
	}

	public void setId(String id) {
		this.id = id;
	}

	@Column(name = "USERNAME", length = 32)
	public String getUsername() {
		return this.username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	@Column(name = "PASSWORD", length = 32)
	public String getPassword() {
		return this.password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	@Column(name = "USER_TYPE")
	public Integer getUserType() {
		return this.userType;
	}

	public void setUserType(Integer userType) {
		this.userType = userType;
	}

	@Column(name = "NAME", length = 65536)
	public String getName() {
		return this.name;
	}

	public void setName(String name) {
		this.name = name;
	}

	@Column(name = "IS_WORK_FLAG")
	public Boolean getIsWorkFlag() {
		return this.isWorkFlag;
	}

	public void setIsWorkFlag(Boolean isWorkFlag) {
		this.isWorkFlag = isWorkFlag;
	}

	public boolean equals(Object other) {
		// 省略
	}

	public int hashCode() {
		// 省略
	}

}

其实这样程序是可以运行的，问题在于视图中的name是可以为空的，在name为空时Hibernate加载不上来数据（为null），请问怎样才能让Hibernate将含有null字段值的记录也加载上来？

网上有人介绍XML配置的解决方式，但我经验不足，没有参照着将Annotation下的解决办法找到，请各位指点一下，谢谢！