正確寫法：
@Override @SuppressWarnings("unchecked") public List<Device> queryOSDevice(String cpu){ String sql = null; if(cpu.equals("os_xp")){ sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.WindowsXP') "; }else if(cpu.equals("os_7")){ sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.Windows7') "; }else if(cpu.equals("Os_Win8")){ sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.Windows81') "; }else if(cpu.equals("Os_Win10")){ sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.Windows10InsiderPreview') "; }else if(cpu.equals("os_vista")){ sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.WindowsVista') "; }else if(cpu.equals("os_2003")){ sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.WindowsServer2003') "; }else if(cpu.equals("os_98")){ sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.Windows98') "; }else if(cpu.equals("os_95")){ sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.Windows95') "; }else if(cpu.equals("os_me")){ sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.WindowsMe') "; }else if(cpu.equals("os_nt")){ sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.WindowsNt') "; }else if(cpu.equals("os_2000")){ sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.Windows2000') "; } return getSession().createQuery(sql).list(); }
1、出現“org.hibernate.QueryException: could not resolve property”錯誤的解決：
起初，hql語句是這樣寫的，報錯：could not resolve property：osId
sql = "from "+this.clazz.getName()+" this WHERE this.osId = (select id from cems_dict_os o where o.name = 'com.vrv.common.system.os.WindowsXP') ";
考慮需要改為 this.os.id ，但是又出現cems_dict_os is not mapped的錯誤
sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from cems_dict_os o where o.name = 'com.vrv.common.system.os.WindowsXP') ";
2、出現“cems_dict_os is not mapped”錯誤的解決：
hql語句都需要從對象里面獲取，所以需要將 cems_dict_os 改成它的實體對象 Os
sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.WindowsXP') ";
3、org.hibernate.QueryParameterException: could not locate named parameter [ip]
其實自己去檢查一下SQL語句就可以了
①：參數不正確，基本上是" 實體屬性=:參數屬性 "（尤其是冒號：這個大家會經常丟掉）
②：畫蛇添足，沒有這個參數，自己認為新增的參數，導致找不到
我導致這個問題的原因是：and this.ip = :ip 寫成了 this.ip = ? ；此外注意： =:參數屬性 ；冒號和參數屬性之間不能有空格
4、SSH框架問題——node to traverse cannot be null!報錯問題：java.lang.IllegalArgumentException: node to traverse cannot be null!
這個錯誤一般是sql、hql語句有問題，比如關鍵字書寫問題，語法問題等，本人犯了一個低級錯誤，使用update的時候，給多個屬性賦值需要使用“，”（逗號）隔開。
5、org.hibernate.QueryException: Not all named parameters have been set: [name]：
if(!"".equals(name)){ sql += "and this.name = :name "; } osDevice = getSession().createQuery(sql).setParameter("name",name).list();
這樣寫就會報這個錯誤，原因是：hibernate 執行sql時沒有找到相應的參數名，改為下面這樣既可：
if(!"".equals(name)){ sql += "and this.name = '" + name + "'"; } osDevice = getSession().createQuery(sql).list();