hibernate用hql写exists语句，多表关联，中间表无实体类。

之前一直用mybatis，最近接触一个项目用的hibernate，hibernate新手，说句不好听的话：特么蛋疼！好难用啊有木有！好难用啊有木有！好难用啊有木有！重要的话说三遍。

因为distinct性能差，所以组织让我调整hql语句。如果用mybatis吧  分分钟就好了，像这样

select a.*
  from t_access_token a
 where exists (select 'T'
          from t_sm_role_access_token r
         where r.access_token_id = a.id
           and exists (select 'T'
                  from t_sm_user_role u
                 where r.role_id = u.role_id
                   and u.user_id = 1))
 order by a.seq asc, a.id asc

hql就蛋疼了啊，中间表没有实体类。hql又是面向对象 ，没办法直接select 'T' from t_sm_role_access_token啊。查了下hql有个elements方法。

东拼西凑写了hql语句， 放详细点。

AccessToken实体类

package cn.ffcs.system.domain;

import static javax.persistence.GenerationType.SEQUENCE;

import java.util.Date;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;

import org.codehaus.jackson.annotate.JsonIgnore;
import org.codehaus.jackson.annotate.JsonIgnoreProperties;

@Entity
@Table(name="t_access_token")
@JsonIgnoreProperties(value={"hibernateLazyInitializer"})
public class AccessToken implements java.io.Serializable{
	
	private Integer id;
	private String sysName;
	private String appKey;
	private String secret;
	private Date createTime;
	private String isEvent;
	private String mailAddress;
	private String isSendMail;
	private Integer pId;
	private String url;
	private String appCode;
	private String host;
	private String type;
	private String status = "1";
	private Set<Role> roles = new HashSet<Role>(0);
	private Integer seq;
	private String icon;
	
	public AccessToken(){}
	
	public AccessToken(Integer id, String sysName, String appKey,
			String secret, Date createTime, String isEvent, String mailAddress,
			String isSendMail, Integer pId, String url, String appCode,
			String host) {
		super();
		this.id = id;
		this.sysName = sysName;
		this.appKey = appKey;
		this.secret = secret;
		this.createTime = createTime;
		this.isEvent = isEvent;
		this.mailAddress = mailAddress;
		this.isSendMail = isSendMail;
		this.pId = pId;
		this.url = url;
		this.appCode = appCode;
		this.host = host;
	}

	@SequenceGenerator(name="seq_accesstoken", sequenceName="seq_accesstoken",allocationSize=10)
 	@GeneratedValue (generator="seq_accesstoken")
    @Column(name="ID", unique=true, nullable=false, precision=22, scale=0)
	@Id
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	
	@Column(name="SYS_NAME", length=250)
	public String getSysName() {
		return sysName;
	}
	public void setSysName(String sysName) {
		this.sysName = sysName;
	}
	
	@Column(name="APP_KEY", length=250)
	public String getAppKey() {
		return appKey;
	}
	public void setAppKey(String appKey) {
		this.appKey = appKey;
	}
	
	@Column(name="SECRET", length=250)
	public String getSecret() {
		return secret;
	}
	public void setSecret(String secret) {
		this.secret = secret;
	}
	
	@Temporal(TemporalType.DATE)
	@Column(name="CREATE_TIME", length=250)
	public Date getCreateTime() {
		return createTime;
	}
	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}
	
	@Column(name="IS_EVENT", length=250)
	public String getIsEvent() {
		return isEvent;
	}
	public void setIsEvent(String isEvent) {
		this.isEvent = isEvent;
	}
	
	@Column(name="MAIL_ADDRESS", length=250)
	public String getMailAddress() {
		return mailAddress;
	}
	public void setMailAddress(String mailAddress) {
		this.mailAddress = mailAddress;
	}
	
	@Column(name="IS_SEND_MAIL", length=250)
	public String getIsSendMail() {
		return isSendMail;
	}
	public void setIsSendMail(String isSendMail) {
		this.isSendMail = isSendMail;
	}
	
	@Column(name="PID")
	public Integer getpId() {
		return pId;
	}

	public void setpId(Integer pId) {
		this.pId = pId;
	}
	
	@Column(name="URL", length=255)
	public String getUrl() {
		return url;
	}

	public void setUrl(String url) {
		this.url = url;
	}
	
	@Column(name="APP_CODE", length=20)
	public String getAppCode() {
		return appCode;
	}

	public void setAppCode(String appCode) {
		this.appCode = appCode;
	}
	
	@Column(name="HOST", length=50)
	public String getHost() {
		return host;
	}

	public void setHost(String host) {
		this.host = host;
	}
	
	@Column(name="TYPE", length=3)
	public String getType() {
		return type;
	}

	public void setType(String type) {
		this.type = type;
	}
	
	public String getStatus() {
		return status;
	}

	public void setStatus(String status) {
		this.status = status;
	}

	@ManyToMany(cascade = CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="accessTokens")
	@JsonIgnore
	public Set<Role> getRoles() {
		return roles;
	}

	public void setRoles(Set<Role> roles) {
		this.roles = roles;
	}
	
	@Column(name="SEQ", length=20)
	public Integer getSeq() {
		return seq;
	}

	public void setSeq(Integer seq) {
		this.seq = seq;
	}
	
	@Column(name="ICON", length=20)
	public String getIcon() {
		return icon;
	}

	public void setIcon(String icon) {
		this.icon = icon;
	}
	

}

User实体类：

package cn.ffcs.system.domain;

// default package

import static javax.persistence.GenerationType.SEQUENCE;

import java.util.Collection;
import java.util.Date;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.Transient;

import org.codehaus.jackson.annotate.JsonIgnore;
import org.codehaus.jackson.annotate.JsonIgnoreProperties;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.GrantedAuthorityImpl;
import org.springframework.security.core.userdetails.UserDetails;

import cn.ffcs.system.common.ReflectIgnore;



/**
 * User entity. @author MyEclipse Persistence Tools
 */
@SuppressWarnings("serial")
@Entity
@Table(name="t_sm_user")
@JsonIgnoreProperties(value={"hibernateLazyInitializer"})
public class User  implements java.io.Serializable, UserDetails {


    // Fields    

     private Integer id;
     private Integer orgId;
     @ReflectIgnore
     private Org org;
     private String account;              //账号
     @ReflectIgnore
     private String password;
     private String nickname;             //昵称/别名
     private String userName;            //用户姓名
     private String tel;                 //联系电话
     private String mobile;              //手机
     private String identityCard;                  //身份证号码
     private Integer sex;               //性别　
     private String jobTitle;           //职位名称
     private String email;               //邮件地址
     private String descript;
     private Integer status = 1;          //记录状态0-,1-
     private Date createTime = new Date();
     private Date updateTime = new Date();
     private Integer createUser;
     private Set<Role> roles = new HashSet<Role>(0);
     @ReflectIgnore
     private Integer[] roleIds;
     @ReflectIgnore
     private String roleNames;
     
     @ReflectIgnore
     private List<Authority> userAuthorities;
     
     private String picPath;

    // Constructors

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

    
    /** full constructor */
    public User(Integer orgId, Org org, String account, String password, String nickname, String tel, String email, String descript, Integer status, Date createTime, Integer createUser, Set<Role> roles,String userName,String mobile,String identityCard,Integer sex,String jobTitle) {
        this.orgId = orgId;
    	this.org = org;
        this.account = account;
        this.password = password;
        this.nickname = nickname;
        this.tel = tel;
        this.email = email;
        this.descript = descript;
        this.status = status;
        this.createTime = createTime;
        this.createUser = createUser;
        this.roles = roles;
        this.userName = userName;
        this.mobile = mobile;
        this.identityCard = identityCard;
        this.sex = sex;
        this.jobTitle = jobTitle;
    }

   
    @SequenceGenerator(name="seq_t_sm_user_id", sequenceName="seq_t_sm_user_id",allocationSize=10)
 	@GeneratedValue (generator="seq_t_sm_user_id")
    @Id
    public Integer getId() {
        return this.id;
    }
    
    public void setId(Integer id) {
        this.id = id;
    }
    
    
    @Column(name="ORG_ID", length=50)
	public Integer getOrgId() {
		return orgId;
	}

	public void setOrgId(Integer orgId) {
		this.orgId = orgId;
	}


	@ManyToOne(fetch=FetchType.LAZY)
        @JoinColumn(name="ORG_ID", insertable=false, updatable=false)

    public Org getOrg() {
        return this.org;
    }
    
    public void setOrg(Org org) {
        this.org = org;
    }
    
    @Column(name="ACCOUNT", length=20)

    public String getAccount() {
        return this.account;
    }
    
    public void setAccount(String account) {
        this.account = account;
    }
    
    @Column(name="PASSWORD", length=50)
    @JsonIgnore
    public String getPassword() {
        return this.password;
    }
    
    public void setPassword(String password) {
        this.password = password;
    }
    
    @Column(name="NICKNAME", length=50)

    public String getNickname() {
        return this.nickname;
    }
    
    public void setNickname(String nickname) {
        this.nickname = nickname;
    }
    
    @Column(name="TEL", length=50)
    
    public String getTel() {
		return tel;
	}


	public void setTel(String tel) {
		this.tel = tel;
	}

	@Column(name="EMAIL", length=50)
	
	public String getEmail() {
		return email;
	}


	public void setEmail(String email) {
		this.email = email;
	}


	@Column(name="DESCRIPT", length=200)

    public String getDescript() {
        return this.descript;
    }
    
    public void setDescript(String descript) {
        this.descript = descript;
    }
    
    @Column(name="STATUS", precision=22, scale=0)
    @JsonIgnore
    public Integer getStatus() {
        return this.status;
    }
    
    public void setStatus(Integer status) {
        this.status = status;
    }
    
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name="CREATE_TIME")
    @JsonIgnore
    public Date getCreateTime() {
        return this.createTime;
    }
    
    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }
    
    @Column(name="CREATE_USER", precision=22, scale=0)
    @JsonIgnore
    public Integer getCreateUser() {
        return this.createUser;
    }
    
    public void setCreateUser(Integer createUser) {
        this.createUser = createUser;
    }

    @ManyToMany(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
	@JoinTable(name = "t_sm_user_role",
		joinColumns = @JoinColumn(name = "USER_ID", referencedColumnName = "id"),
		inverseJoinColumns = @JoinColumn(name = "ROLE_ID", referencedColumnName = "id")
	)
    @JsonIgnore
	public Set<Role> getRoles() {
		return roles;
	}

	public void setRoles(Set<Role> roles) {
		this.roles = roles;
	}

	@Transient
	public Integer[] getRoleIds() {
		return roleIds;
	}


	public void setRoleIds(Integer[] roleIds) {
		this.roleIds = roleIds;
	}
	
	@Transient
    @JsonIgnore
	public List<Authority> getUserAuthorities() {
		return userAuthorities;
	}


	public void setUserAuthorities(List<Authority> userAuthorities) {
		this.userAuthorities = userAuthorities;
	}
	
	@Column(name="PIC_PATH", length=50)
	public String getPicPath() {
		return picPath;
	}


	public void setPicPath(String picPath) {
		this.picPath = picPath;
	}


	//覆盖spring security的方法
	@Override
	@Transient
    @JsonIgnore
	public Collection<GrantedAuthority> getAuthorities() {
		
		Set<GrantedAuthority> grantedAuthorities = new HashSet<GrantedAuthority>();
		
		for(Authority authority : userAuthorities){
			grantedAuthorities.add(new GrantedAuthorityImpl("AUTH_" + authority.getId()));
		}
		
		return grantedAuthorities;
	}


	@Override
	@Transient
    @JsonIgnore
	public String getUsername() {
		return this.account;
	}


	@Override
	@Transient
    @JsonIgnore
	public boolean isAccountNonExpired() {
		// TODO Auto-generated method stub
		return true;
	}


	@Override
	@Transient
    @JsonIgnore
	public boolean isAccountNonLocked() {
		// TODO Auto-generated method stub
		return true;
	}


	@Override
	@Transient
    @JsonIgnore
	public boolean isCredentialsNonExpired() {
		// TODO Auto-generated method stub
		return true;
	}


	@Override
	@Transient
    @JsonIgnore
	public boolean isEnabled() {
		// TODO Auto-generated method stub
		return true;
	}

	@Column(name="USERNAME", length=50)
	public String getUserName() {
		return userName;
	}


	public void setUserName(String userName) {
		this.userName = userName;
	}

	@Column(name="MOBILE", length=50)
	public String getMobile() {
		return mobile;
	}


	public void setMobile(String mobile) {
		this.mobile = mobile;
	}

	@Column(name="IDENTITYCARD", length=50)
	public String getIdentityCard() {
		return identityCard;
	}


	public void setIdentityCard(String identityCard) {
		this.identityCard = identityCard;
	}

	@Column(name="SEX", length=20)
	public Integer getSex() {
		return sex;
	}

	
	public void setSex(Integer sex) {
		this.sex = sex;
	}

	@Column(name="JOBTITLE", length=50)
	public String getJobTitle() {
		return jobTitle;
	}


	public void setJobTitle(String jobTitle) {
		this.jobTitle = jobTitle;
	}

	@Temporal(TemporalType.TIMESTAMP)
	@Column(name="UPDATE_TIME")
	@JsonIgnore
	public Date getUpdateTime() {
		return updateTime;
	}


	public void setUpdateTime(Date updateTime) {
		this.updateTime = updateTime;
	}

	@Transient
	public String getRoleNames() {
		return roleNames;
	}


	public void setRoleNames(String roleNames) {
		this.roleNames = roleNames;
	}

}

Role实体类

package cn.ffcs.system.domain;

import static javax.persistence.GenerationType.SEQUENCE;
import java.io.IOException;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import javax.persistence.JoinColumn;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.Transient;

import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.annotate.JsonAutoDetect;
import org.codehaus.jackson.annotate.JsonIgnore;
import org.codehaus.jackson.annotate.JsonIgnoreProperties;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.map.ObjectMapper;
import org.hibernate.annotations.GenericGenerator;

import cn.ffcs.system.common.ReflectIgnore;


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


    // Fields    

     /**
	 * 
	 */
	private static final long serialVersionUID = 5586297524648936632L;
	private Integer id;
     private String name;
     private String descript;
     private Integer status = 1;
     private Date createTime = new Date();
     private Integer createUser;
     private Set<User> users = new HashSet<User>(0);
     private Set<Authority> authorities = new HashSet<Authority>(0);
     private Set<AccessToken> accessTokens = new HashSet<AccessToken>(0);
     @ReflectIgnore
     private Integer[] authorityIds;
     private Set<Mobile> menus = new HashSet<Mobile>(0);
     @ReflectIgnore
     private Integer[] menuIds;
     @ReflectIgnore
     private Integer[] accessTokenIds;
     
     
    // Constructors

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

    /*
    *//** full constructor */
    public Role(String name, String descript, Integer status, Date createTime, Integer createUser, Set<User> users, Set<Authority> authorities) {
        this.name = name;
        this.descript = descript;
        this.status = status;
        this.createTime = createTime;
        this.createUser = createUser;
        this.users = users;
        this.authorities = authorities;
    }
 
    @SequenceGenerator(name="seq_t_sm_role_id", sequenceName="seq_t_sm_role_id",allocationSize=10)
  	@GeneratedValue (generator="seq_t_sm_role_id")
    @Id
    public Integer getId() {
        return this.id;
    }
    
    public void setId(Integer id) {
        this.id = id;
    }
    
    @Column(name="NAME", length=20)

    public String getName() {
        return this.name;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    @Column(name="DESCRIPT", length=200)

    public String getDescript() {
        return this.descript;
    }
    
    public void setDescript(String descript) {
        this.descript = descript;
    }
    
    @Column(name="STATUS", precision=22, scale=0)
    @JsonIgnore
    public Integer getStatus() {
        return this.status;
    }
    
    public void setStatus(Integer status) {
        this.status = status;
    }
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name="CREATE_TIME", length=7)
    @JsonIgnore
    public Date getCreateTime() {
        return this.createTime;
    }
    
    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }
    
    @Column(name="CREATE_USER", precision=22, scale=0)
    @JsonIgnore
    public Integer getCreateUser() {
        return this.createUser;
    }
    
    public void setCreateUser(Integer createUser) {
        this.createUser = createUser;
    }

	@ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "roles")
	@JsonIgnore
	public Set<User> getUsers() {
		return users;
	}


	public void setUsers(Set<User> users) {
		this.users = users;
	}

	@ManyToMany(cascade = CascadeType.PERSIST, fetch=FetchType.LAZY)
	@JoinTable(name = "t_sm_role_auth",
		joinColumns = @JoinColumn(name = "ROLE_ID", referencedColumnName = "id"),
		inverseJoinColumns = @JoinColumn(name = "AUTHORITY_ID", referencedColumnName = "id")
	)
	@JsonIgnore
	public Set<Authority> getAuthorities() {
		return authorities;
	}
	
	public void setAuthorities(Set<Authority> authorities) {
		this.authorities = authorities;
	}
	
	@ManyToMany(cascade = CascadeType.PERSIST, fetch=FetchType.LAZY)
	@JoinTable(name = "t_sm_role_access_token",
			joinColumns = @JoinColumn(name ="ROLE_ID", referencedColumnName = "id"),
			inverseJoinColumns = @JoinColumn(name="ACCESS_TOKEN_ID", referencedColumnName = "id"))
	@JsonIgnore
	public Set<AccessToken> getAccessTokens() {
		return accessTokens;
	}

	public void setAccessTokens(Set<AccessToken> accessTokens) {
		this.accessTokens = accessTokens;
	}

	@Transient
	public Integer[] getAuthorityIds() {
		return authorityIds;
	}


	public void setAuthorityIds(Integer[] authorityIds) {
		this.authorityIds = authorityIds;
	}
	
	
	@ManyToMany(cascade = CascadeType.PERSIST, fetch=FetchType.LAZY)
	@JoinTable(name = "t_sm_role_sso",
		joinColumns = @JoinColumn(name = "ROLE_ID", referencedColumnName = "id"),
		inverseJoinColumns = @JoinColumn(name = "AUTHORITY_ID", referencedColumnName = "MENU_ID")
	)
	@JsonIgnore
	public Set<Mobile> getMenus() {
		return menus;
	}
	
	public void setMenus(Set<Mobile> menus) {
		this.menus = menus;
	}

	
	@Transient
	public Integer[] getMenuIds() {
		return menuIds;
	}
	public void setMenuIds(Integer[] menuIds) {
		this.menuIds = menuIds;
	}
	
	@Transient
	public Integer[] getAccessTokenIds() {
		return accessTokenIds;
	}
	
	public void setAccessTokenIds(Integer[] accessTokenIds) {
		this.accessTokenIds = accessTokenIds;
	}
   
}

hql语句

select a from AccessToken a where exists (from Role r where a in elements(r.accessTokens) and exists(from User u where r in elements(u.roles) and u.id = ?) and r.status = 1) and a.status = 1 order by a.seq asc, a.id asc

最后打印出来的sql语句

select accesstoke0_.ID           as ID0_,
       accesstoke0_.TYPE         as TYPE0_,
       accesstoke0_.HOST         as HOST0_,
       accesstoke0_.SEQ          as SEQ0_,
       accesstoke0_.ICON         as ICON0_,
       accesstoke0_.status       as status0_,
       accesstoke0_.MAIL_ADDRESS as MAIL7_0_,
       accesstoke0_.URL          as URL0_,
       accesstoke0_.CREATE_TIME  as CREATE9_0_,
       accesstoke0_.SYS_NAME     as SYS10_0_,
       accesstoke0_.APP_KEY      as APP11_0_,
       accesstoke0_.SECRET       as SECRET0_,
       accesstoke0_.IS_EVENT     as IS13_0_,
       accesstoke0_.IS_SEND_MAIL as IS14_0_,
       accesstoke0_.PID          as PID0_,
       accesstoke0_.APP_CODE     as APP16_0_
  from t_access_token accesstoke0_
 where (exists (select role1_.id
                  from t_sm_role role1_
                 where (accesstoke0_.ID in
                       (select accesstoke2_.ACCESS_TOKEN_ID
                           from t_sm_role_access_token accesstoke2_
                          where role1_.id = accesstoke2_.ROLE_ID))
                   and (exists (select user3_.id
                                  from t_sm_user user3_
                                 where (role1_.id in
                                       (select roles4_.ROLE_ID
                                           from t_sm_user_role roles4_
                                          where user3_.id = roles4_.USER_ID))
                                   and user3_.id = 1))
                   and role1_.STATUS = 1))
   and accesstoke0_.status = 1
 order by accesstoke0_.SEQ asc, accesstoke0_.ID asc

关键点：

1、是实体类添加的Set集合

2、hql的elements函数