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


  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

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;
    }


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