hibernte(hibernateTemplate)组合查询

HSL语句：

String queryString="select new com.dio.blog.dto.UserDto(fu.id,fu.username,fu.password) from FriendUser fu where fu.username=?";

选择出的字段保存在UserDto对象里面，UserDto类必须包含该所有字段的构造方法
UserDto代码如下：

package com.dio.blog.dto;

/**
 * 用户登录数据传输对象
 * @author Administrator
 *
 */
public class UserDto {

	private String id;
	private String username;
	private String password;
	
	
	/**
	 * 引用数据传输对象，必须有构造方法
	 * @param id
	 * @param username
	 * @param password
	 */
	public UserDto(String id, String username, String password) {
		super();
		this.id = id;
		this.username = username;
		this.password = password;
	}
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	
}