因為一直報實體類空異常,去網上查了資料只查到了並沒有查到數據庫空值時不給實體類賦值的屬性,只有這兩個屬性

　　這兩個屬性時設置 實體類有空字段插入或更新 數據庫時空屬性為默認值

異常

org.hibernate.InvalidMappingException: Could not parse mapping document from resource cn/pojo/EmpDao.xml
    at org.hibernate.cfg.Configuration.addResource(Configuration.java:616)
    at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:
 
1635)
    at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1603)
    at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1582)
    at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1556)
    at org.hibernate.cfg.Configuration.configure(Configuration.java:
 
1476)
    at org.hibernate.cfg.Configuration.configure(Configuration.java:1462)
    at cn.tool.HibernateUtil.<clinit>(HibernateUtil.java:16)
    at cn.service.EmpService.findEmpById(EmpService.java:16)
    at cn.Test.main(Test.java:9)
Caused by: org.hibernate.InvalidMappingException: Could not
 
 parse mapping document from input stream
    at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:555)
    at org.hibernate.cfg.Configuration.addResource(Configuration.java:613)
    ... 9 more
Caused by: org.dom4j.DocumentException: Connection reset Nested exception: Connection reset
    at org.dom4j.io.SAXReader.read(SAXReader.java:484)
    at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:546)
    ... 10 more
Exception in thread "main" java.lang.NullPointerException
    at cn.tool.HibernateUtil.currentSession(HibernateUtil.java:29)
    at cn.service.EmpService.findEmpById(EmpService.java:16)
    at cn.Test.main(Test.java:9)

於是就加了這段代碼

 public void setComm(Object comm) {
        if(comm!=null)
            this.comm = (double)comm;
    }

hibernate映射實體類查詢時數據庫空字段賦值給實體類報錯的問題