hibernate操作步驟（代碼部分）

時間＼2017-06-13

1.載入hibernate的核心設定檔

2.創建SessionFactory對象

3.使用SessionFactory創建Session物件

4.開啟事務（手動開啟）

5.寫具體邏輯crud，增刪改查操作

6.提交事物

7.關閉資源

代碼如下：

1 package com.hui.hibernate; 2 3 import org.hibernate.Session; 4 import org.hibernate.SessionFactory; 5 import org.hibernate.Transaction; 6 import org.hibernate.cfg.Configuration; 7 import org.junit.Test; 8 9 public class HibernateDemo01 { 10 11 public static void main(String[] args) { 12 add; 13 14 } 15 16 @SuppressWarnings("deprecation") 17 @Test 18 public static void add { 19 // 1.載入hibernate的核心設定檔 20 Configuration con = new Configuration;//載入設定檔的對象，在src下找到hibernate.cfg.xml檔放到物件中 21 con.configure;//開始載入 22 // 23 // 2.創建SessionFactory物件,讀取核心設定檔內容創建SessionFactory，

根據映射關係創建表 24 SessionFactory sf = con.buildSessionFactory; 25 // 3.使用SessionFactory創建Session物件 26 //類似於連接 27 Session se = sf.openSession; 28 // 4.開啟事務（手動開啟） 29 Transaction tr = se.beginTransaction; 30 // 5.寫具體邏輯crud，增刪改查操作,操作實體類物件 31 User u = new User;//uid不用設置值，他為自增長的主鍵 32 u.setUsername("劉冬冬"); 33 u.setPassword("123456"); 34 u.setAddress("中國陝西"); 35 //調用Session方法save完成操作 36 se.save(u); 37 38 // 6.提交事物 39 tr.commit; 40 // 7.關閉資源 41 se.close; 42 sf.close; 43 44 } 45 46 }

8.測試，運行報錯

報的錯誤如下

log4j:WARN No appenders could be found for logger (org.jboss.logging). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. Exception in thread "main" org.hibernate.InvalidMappingException: Unable to read XML at org.hibernate.internal.util.xml.MappingReader.legacyReadMappingDocument(MappingReader.java:375) at org.hibernate.internal.util.xml.MappingReader.readMappingDocument(MappingReader.java:304) at org.hibernate.cfg.Configuration.add(Configuration.java:518) at org.hibernate.cfg.Configuration.add(Configuration.java:514) at org.hibernate.cfg.Configuration.add(Configuration.java:688) at org.hibernate.cfg.Configuration.addResource(Configuration.java:771) at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:2257) at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:2229) at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2209) at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2162) at org.hibernate.cfg.Configuration.configure(Configuration.java:2077) at org.hibernate.cfg.Configuration.configure(Configuration.java:2056) at com.hui.hibernate.HibernateDemo01.add(HibernateDemo01.java:21) at com.hui.hibernate.HibernateDemo01.main(HibernateDemo01.java:12) Caused by: org.xml.sax.SAXParseException; lineNumber: 22; columnNumber: 40; 必須為元素類型 "id" 聲明屬性 "colnum"。 at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203) at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:396) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:284) at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.addDTDDefaultAttrsAndValidate(XMLDTDValidator.java:1253) at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleStartElement(XMLDTDValidator.java:1917) at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:742) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:380) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2787) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:118) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:643) at org.dom4j.io.SAXReader.read(SAXReader.java:465) at org.hibernate.internal.util.xml.MappingReader.legacyReadMappingDocument(MappingReader.java:325) ... 13 more

原因：如下圖紅線部分column寫成了colnum，所以hibernate不能識別了，因而報錯改回來就成了

9.改後測試結果如下：創建了表t_user而且插入了一條資料