Database: XML, parsing dom4j

 PackageCom.itheima.util;ImportJava.io.FileOutputStream;ImportJava.net.URL;Importorg.dom4j.Document;ImportOrg.dom4j.io.OutputFormat;ImportOrg.dom4j.io.SAXReader;ImportOrg.dom4j.io.XMLWriter; Public classDom4jutil {Private StaticString Xmlrealpath; Static{ClassLoader cl= Dom4jutil.class. getClassLoader (); URL URL= Cl.getresource ("Users.xml"); Xmlrealpath=Url.getpath (); }         Public StaticDocument GetDocument ()throwsexception{Saxreader Reader=NewSaxreader ();//return Reader.read ("Src/users.xml");//Error        returnReader.read (Xmlrealpath); }     Public Static voidWrite2xml (document Document)throwsexception{XMLWriter writer=NewXMLWriter (NewFileOutputStream (Xmlrealpath), Outputformat.createprettyprint ());        Writer.write (document);    Writer.close (); }}

 PackageCom.itheima.dao.impl;ImportJava.text.DateFormat;ImportJava.text.SimpleDateFormat;Importjava.util.Date;Importjava.util.List;Importorg.dom4j.Document;Importorg.dom4j.Element;ImportOrg.dom4j.Node;ImportCom.itheima.dao.UserDao;ImportCom.itheima.domain.User;ImportCom.itheima.util.Dom4JUtil; Public classUserdaoxmlimplImplementsUserdao { PublicUser Findbyusername (String username) {Try{Document doc=dom4jutil.getdocument ();//list<node> usernodes = Doc.selectnodes ("//user ");Node node = Doc.selectsinglenode ("//user[@username = '" +username+ "']"); if(node==NULL)                return NULL; String Xmlbirthday= Node.valueof ("@birthday"); DateFormat DF=NewSimpleDateFormat ("Yyyy-mm-dd"); Date Birthday=Df.parse (Xmlbirthday); User User=NewUser (node.valueof ("@username"), Node.valueof ("@password"), Node.valueof ("@email"), birthday); returnuser; } Catch(Exception e) {Throw NewRuntimeException (e); }    }    //<user username= "abc" password= "123" email= "[email protected]" birthday= " 1980-10-01"/>     Public voidSave (User user) {Try{Document doc=dom4jutil.getdocument (); Element Root=doc.getrootelement (); Root.addelement ("User"). AddAttribute ("Username", User.getusername ()). AddAttribute ("Password", User.getpassword ()). AddAttribute ("Email", User.getemail ()). AddAttribute ("Birthday", User.getbirthday (). toLocaleString ());        Dom4jutil.write2xml (DOC); } Catch(Exception e) {Throw NewRuntimeException (e); }    }     PublicUser Finduser (string Username, string password) {Try{Document doc=dom4jutil.getdocument ();//list<node> usernodes = Doc.selectnodes ("//user ");Node node = Doc.selectsinglenode ("//user[@username = '" +username+ "and @password = '" +password+ "']"); if(node==NULL)                return NULL; String Xmlbirthday= Node.valueof ("@birthday"); DateFormat DF=NewSimpleDateFormat ("Yyyy-mm-dd"); Date Birthday=Df.parse (Xmlbirthday); User User=NewUser (node.valueof ("@username"), Node.valueof ("@password"), Node.valueof ("@email"), birthday); returnuser; } Catch(Exception e) {Throw NewRuntimeException (e); }    }}

 PackageCom.itheima.dao.impl;ImportJava.text.DateFormat;ImportJava.text.SimpleDateFormat;Importjava.util.Date;Importjava.util.List;Importorg.dom4j.Document;Importorg.dom4j.Element;ImportOrg.dom4j.Node;ImportCom.itheima.dao.UserDao;ImportCom.itheima.domain.User;ImportCom.itheima.util.Dom4JUtil; Public classUserdaoxmlimplImplementsUserdao { PublicUser Findbyusername (String username) {Try{Document doc=dom4jutil.getdocument ();//list<node> usernodes = Doc.selectnodes ("//user ");Node node = Doc.selectsinglenode ("//user[@username = '" +username+ "']"); if(node==NULL)                return NULL; String Xmlbirthday= Node.valueof ("@birthday"); DateFormat DF=NewSimpleDateFormat ("Yyyy-mm-dd"); Date Birthday=Df.parse (Xmlbirthday); User User=NewUser (node.valueof ("@username"), Node.valueof ("@password"), Node.valueof ("@email"), birthday); returnuser; } Catch(Exception e) {Throw NewRuntimeException (e); }    }    //<user username= "abc" password= "123" email= "[email protected]" birthday= " 1980-10-01"/>     Public voidSave (User user) {Try{Document doc=dom4jutil.getdocument (); Element Root=doc.getrootelement (); Root.addelement ("User"). AddAttribute ("Username", User.getusername ()). AddAttribute ("Password", User.getpassword ()). AddAttribute ("Email", User.getemail ()). AddAttribute ("Birthday", User.getbirthday (). toLocaleString ());        Dom4jutil.write2xml (DOC); } Catch(Exception e) {Throw NewRuntimeException (e); }    }     PublicUser Finduser (string Username, string password) {Try{Document doc=dom4jutil.getdocument ();//list<node> usernodes = Doc.selectnodes ("//user ");Node node = Doc.selectsinglenode ("//user[@username = '" +username+ "and @password = '" +password+ "']"); if(node==NULL)                return NULL; String Xmlbirthday= Node.valueof ("@birthday"); DateFormat DF=NewSimpleDateFormat ("Yyyy-mm-dd"); Date Birthday=Df.parse (Xmlbirthday); User User=NewUser (node.valueof ("@username"), Node.valueof ("@password"), Node.valueof ("@email"), birthday); returnuser; } Catch(Exception e) {Throw NewRuntimeException (e); }    }}

 Packagecom.itheima.test;Import Staticorg.junit.assert.*;Importjava.util.Date;Importorg.junit.Test;ImportCom.itheima.domain.User;Importcom.itheima.exception.UserHasExistException;ImportCom.itheima.service.BusinessService;ImportCom.itheima.service.impl.BusinessServiceImpl; Public classBusinessserviceimpltest {PrivateBusinessservice s =NewBusinessserviceimpl (); @Test Public voidTestregist ()throwsuserhasexistexception {User User=NewUser ("wzhting", "123", "[email protected]",NewDate ());    S.regist (user); } @Test (Expected=com.itheima.exception.userhasexistexception.class)     Public voidTestRegist1 ()throwsuserhasexistexception {User User=NewUser ("wzhting", "123", "[email protected]",NewDate ());    S.regist (user); } @Test Public voidTestlogin () {User User= S.login ("wzhting", "123");        Assertnotnull (user); User= S.login ("wzhting", "111");        Assertnull (user); User= S.login ("asf", "111");    Assertnull (user); }}

 PackageCom.itheima.util;Importjavax.servlet.http.HttpServletRequest;Importorg.apache.commons.beanutils.BeanUtils; Public classBeanutil {//encapsulates the request parameters into the specified JavaBean     Public Static<T> T Fillbean (httpservletrequest request,class<t>clazz) {        Try{T Bean=clazz.newinstance ();            Beanutils.populate (Bean, Request.getparametermap ()); returnBean; } Catch(Exception e) {Throw NewRuntimeException (e); }    }}

Database: XML, parsing dom4j