Hibernate查询只返回一个值

Question

我想创建一个Spring Hibernate的应用程序，我访问具有以下值的表：在DAOImpl类

select REPAIR_STATUS_CD,STATUS_DATE 
from repair_status 
where REPAIR_CONF_NO ='1234567'; 

REPAIR_STATUS_CD STATUS_DATE   
----- -------------------- - 
NEWO 25-FEB-2016 20:07:45 
RLSD 25-FEB-2016 20:07:45 
REQA 25-FEB-2016 20:13:24 
URCD 26-FEB-2016 19:43:40 
UINS 26-FEB-2016 19:43:45 
UBER 27-FEB-2016 09:42:59 
RQT6 27-FEB-2016 09:46:28 
RQXP 03-MAR-2016 12:24:43 
RBER 04-MAR-2016 21:52:22 
SPCM 09-MAY-2016 18:13:33 
SCOM 10-MAY-2016 19:09:54 

现在我取相同的使用下面的码。

Session session = sessionFactory.getCurrentSession(); 

      session.beginTransaction(); 

      Query<RepairStatus> query = session.createQuery("from  RepairStatus where repairConfNo = '"+repairConfNo+"' "); 
      List<RepairStatus> repairStatusList = query.getResultList();  
      System.out.println("Inside Repair Status Service"); 
      for(RepairStatus repairStatus: repairStatusList){ 
       System.out.println(repairStatus.getRepairStatusCode()); 
      } 

但是，当我使用的系统输出和打印输出的for循环我得到以下几点：

内部维修状态服务

NEWO 
NEWO 
NEWO 
NEWO 
NEWO 
NEWO 
NEWO 
NEWO 
NEWO 

为什么行得到重复，虽然数据库具有适当的价值。

感谢很多提前:)

而且这是我的实体类

package com.gsx.entity; 

import java.util.Date; 

import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.Id; 
import javax.persistence.Table; 

@Entity 
@Table(name="TG_REPAIR_STATUS") 
public class RepairStatus { 

@Id 
@Column(name="REPAIR_CONF_NO") 
private String repairConfNo; 

@Column(name="REPAIR_STATUS_CD") 
private String repairStatusCode; 

@Column(name="STATUS_DATE") 
private Date statusDate; 

public void setStatusDate(Date statusDate) { 
    this.statusDate = statusDate; 
} 

public String getRepairConfNo() { 
    return repairConfNo; 
} 

public void setRepairConfNo(String repairConfNo) { 
    this.repairConfNo = repairConfNo; 
} 

public Date getStatusDate() { 
    return statusDate; 
} 

public String getRepairStatusCode() { 
    return repairStatusCode; 
} 

public void setRepairStatusCode(String repairStatusCode) { 
    this.repairStatusCode = repairStatusCode; 
} 

} 

Answer 1

此时应更换

Query<RepairStatus> query = session.createQuery("from  RepairStatus where repairConfNo = '"+repairConfNo+"' "); 

到

Query<RepairStatus> query = session.createQuery("from  RepairStatus where repairConfNo =:repairConfNo"); 
parameterQuery.setParameter("repairConfNo", you_repairConfNo); 
List<RepairStatus> repairStatusList = query.getResultList(); 

查询是好看，你需要enabl E中的show_sql

如果您正在使用hibernate.cfg.xml那么你可以让喜欢

<property name="show_sql">true</property> 

那么SQL调试由Hibernate生成的SQL语句，它可以帮助你找出问题。

而且你的表名是TG_REPAIR_STATUS

@Table(name="TG_REPAIR_STATUS") 
public class RepairStatus 

和你在repair_status运行的查询

select REPAIR_STATUS_CD,STATUS_DATE 
from repair_status 
where REPAIR_CONF_NO ='1234567'; 

表而不是TG_REPAIR_STATUS表，请验证该数据库

上