J2EE上机代码集.doc

以下文件均为上机编译通过，无毒、无码：Ex1:（序列化）Sju.xml:!-注意格式 Kobe Bryant 金泰熙 杰西卡阿尔芭 杨华 Course.java/切记：对象可序列化的3个必要条件package Demo;public class Course implements java.io.Serializable /实现支持可序列化接口private String name=J2EE;private int credit=3;private int time=48;public void setName(String name) = name;public String getName() return name;public void setCredit(int credit) this.credit = credit;public int getCredit() return credit;public void setTime(int time) this.time = time;public int getTime() return time;/重写该类的toString()方法，此处标识重写基类的方法一般以Override，/所有类都继承自object类，想输出类的特定信息必须要重写object基类的/toString()方法Overridepublic String toString()return 课程名：+name+学分：+credit;CreateCourses:package Demo;/注意要导入的命名空间import java.beans.XMLDecoder;import java.beans.XMLEncoder;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;public class CreateCourse public static void main(String args) /所有java应用程序都必须要有Course c=new Course();/Main()方法，该方法也是程序c.setName(JSP);/默认起始执行方法。c.setCredit(4);c.setTime(64);System.out.print(c);/SaveToFile(c);/ReadFromFile();/SaveToXml(c);/ReadFromXml();public static void SaveToFile(Course c)try/创建文件输出流FileOutputStream fos=new FileOutputStream(D:Course); /对象输出流(流嵌套)ObjectOutputStream oos=new ObjectOutputStream(fos);oos.writeObject(c);/序列化到” D:Course”catch(Exception e)e.printStackTrace();public static void ReadFromFile()try/创建文件输入流FileInputStream fis=new FileInputStream(D:Course); /对象输入流(包装了文件流) ObjectInputStream ois=new ObjectInputStream(fis);Course c=(Course)ois.readObject();/默认返回Object类型，强制转换！System.out.print(c);/默认调用类toString()方法catch(Exception e)e.printStackTrace();public static void SaveToXml(Course c)tryFileOutputStream fos=new FileOutputStream(D:Course.xml);XMLEncoder encoder=new XMLEncoder(fos);/XML编码器encoder.writeObject(c);/往目标文件内写入对象(序列化为XML)encoder.close();catch(Exception e)e.printStackTrace();public static void ReadFromXml()tryFileInputStream fis=new FileInputStream(D:Course.xml);XMLDecoder decoder=new XMLDecoder(fis);/XML解码器/反序列化，读出对象，该方法默认返回object类型对象Course c=(Course)decoder.readObject();System.out.print(c);catch(Exception e)e.printStackTrace();Ex2:(操作XML文件，jdom)Users.xml注意，要求创建一个文件夹，并且导入jdom.jar的JAR包 User.java:package XML;import java.io.File;import java.io.FileWriter;import java.io.IOException;/注意对XML的操作相关类都封装在jdom JAR包中import org.jdom.Document;import org.jdom.Element;import org.jdom.JDOMException;import org.jdom.input.SAXBuilder;import org.jdom.output.Format;import org.jdom.output.XMLOutputter;public class User private String file=D:/JAVA-Eclipse WorkSpace/Ex2/Users.xml;private Document doc_1;public User()SAXBuilder sb=new SAXBuilder();/SAX解析器try /传参：由路径构成的文件doc_1=sb.build(new File(file);/返回：一个Document类型对象 catch (JDOMException e) /特定异常类型/ TODO Auto-generated catch blocke.printStackTrace(); catch (IOException e) /切记：捕获时从特殊到一般/ TODO Auto-generated catch blocke.printStackTrace();public String getName()Element user=doc_1.getRootElement();/获得根节点/获取子节点,并取其属性“true_name”return user.getChild(user).getAttributeValue(true_name);public void save()try FileWriter fw=new FileWriter(file);/写文件包装器/获得用于操作XML的特定格式Format f=Format.getPrettyFormat();/将XML文件的编码设置为/格式的编码,确保不写入乱码f.setEncoding(fw.getEncoding();/XML输出流操作对象(从/内存到文件)；XMLOutputter out=new XMLOutputter(f);/将编辑过的XML文档doc_1，写入文件的FileWriter，由其写入物理文件out.output(doc_1, fw);fw.close(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();UserText_1:package XML;public class UserText_1 /* * param args */public static void main(String args) User user_1=new User();System.out.print(user_1.getName();user_1.save();Ex3:Users.java:package XML;import java.io.File;import java.io.FileWriter;import java.io.IOException;import org.jdom.Attribute;import org.jdom.Document;import org.jdom.Element;import org.jdom.JDOMException;import org.jdom.input.SAXBuilder;import org.jdom.output.Format;import org.jdom.output.XMLOutputter;public class users private String files=D:/JAVA-Eclipse WorkSpace/Ex3/users.xml;private Document doc;public users()/用于在JAVA中解析XML的APISAXBuilder sb=new SAXBuilder();try /获取指定路径处的XML文件，返回Document类型的对象，用于对/XML文件进行操作。因此你是否能明白，面向接口是多么强大，它/高于实现，无须关注细节。它依赖于什么？依赖于抽象！doc=sb.build(new File(files); catch (JDOMException e) / TODO Auto-generated catch blocke.printStackTrace(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();public String gettrue_name()Element root=doc.getRootElement();return root.getChild(user).getAttributeValue(true_name);public void Save()try FileWriter fw=new FileWriter(files);Format f=Format.getPrettyFormat();f.setEncoding(fw.getEncoding();XMLOutputter out=new XMLOutputter(f);out.output(doc, fw);fw.close(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();/增加节点，需要注意的是，一个XML中的节点，根节点，元素的属性，甚/至是空白都为Element类型，类似于所有类型都派生于Objectpublic void addUser(String id)Element root=doc.getRootElement();Element newuser=new Element(user);/创建一个为user的元素root.addContent(newuser);/追加该元素newuser.setAttribute(new Attribute(id,id);/设置该节点的属性，键值对Save();/保存Test:package XML;public class Test /* * param args */public static void main(String args) users user=new users();/System.out.print(user.gettrue_name();/user.Save();user.addUser(25);Spring:applicationContext_xsd3.xml:beans xmlns=/schema/beans 大学英语 4 64 !- 参数 !- 引用 59!- 值 大学英语 4 64 59 B07051051杨华2010-10-19 !- List类型 Course:package domain;public class Course implements java.io.Serializable/Do you know what is final? And what is finally or Finalize?private static final long serialVersionUID = -2568427801554502789L;private String name;private int credit;private int hours;public Course() public String getName() return name;public void setName(String name) = name;public int getCredit() return credit;public void setCredit(int credit) this.credit = credit;public int getHours() return hours;public void setHours(int hours) this.hours = hours;Overridepublic String toString()return Course + (name=null?:name) + , + credit + , + hours + ;/此处作出说明：object为万类之基，其有一些基方法，诸如toString()不/再多说，还有两个很重要的方法就是以下的两个：hashCode()、equals()，/hashCode()：获得类对象的hash编码；/equals():比较对象值是否相等，这和C#真好相反，C#是比较对象的引用/是否相等/我们经常需要重写equals()方法另外一个很重要的常识是，我们在重写/equals()方法的同时，必须要重写hashcode()/真诚的希望有一天你能发现java和C#殊途同归Overridepublic int hashCode()return name.hashCode() + credit + hours;Overridepublic boolean equals(Object o)if (o=null) return false;if (this.getClass() != o.getClass() return false;Course that = (Course)o;return (name.equals() & (credit = that.credit) & (hours = that.hours);CourseEvent:package domain;public class CourseEvent private Course course;private int score;public Course getCourse() return course;public void setCourse(Course course) this.course = course;public int getScore() return score;public void setScore(int score) this.score = score;public CourseEvent() public CourseEvent(Course c,int s)course=c;score=s;Student：package domain;import java.util.Date;import java.util.List;public class Student private String id;private String name;private Date dayOfBirth;private List courses;public List getCourses() return courses;public void setCourses(List courses) this.courses = courses;public String getId() return id;public void setId(String id) this.id = id;public String getName() return name;public void setName(String name) = name;public Date getDayOfBirth() return dayOfBirth;public void setDayOfBirth(Date dayOfBirth) this.dayOfBirth = dayOfBirth;public Student() / TODO Auto-generated constructor stubSpringTest:package domain;/注意导入的springJAR包import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class SpringText /* * param args */public static void main(String args) /如果你知道FactoryMethod 这个设计模式的话，这边就不用看了，创建对象/的任务交给Spring，此处获取Spring的配置文件ApplicationContext ctx= new ClassPathXmlApplicationContext(applicationContext_xsd3.xml);/获得Course类的一个对象，默为ObjectCourse c=(Course)ctx.getBean(course1);/调用重写的toString()方法System.out.println(c);Student s=(Student)ctx.getBean(student1);System.out.print(s.getDayOfBirth();System.out.print(course:+s.getCourses().toString();CourseEvent ce=(CourseEvent)ctx.getBean(ce1);System.out.print(ce.getCourse().getName();Jdbc-odbc:User.javapackage demo;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;/MS-SqlServer数据库驱动import com.microsoft.sqlserver.jdbc.SQLServerDriver;public class User private Connection conn;private String name;private String password;public User() / TODO Auto-generated constructor stubpublic boolean isValid()/String query=select * from users where uname= +/name+ and pwd= +/password+ ;String query2=select * from users where uname=? and pwd=?;/使用参数connect();try PreparedStatement stmt=conn.prepareStatement(query2);stmt.setString(1, name);stmt.setString(2, password);ResultSet res=stmt.executeQuery();return res.next(); catch (SQLException e) / TODO Auto-generated catch blocke.printStackTrace();return false;public void connect()String driver_1=sun.jdbc.odbc.JdbcOdbcDriver;String url_1=jdbc:odbc:hp;String driver_2=com.microsoft.sqlserver.jdbc.SQLServerDriver;String url_2=jdbc:sqlserver:/:1433; DatabaseName=sample;tryClass.forName(driver_2);conn=DriverManager.getConnection(url_2,sample,sample);catch(Exception e)e.printStackTrace();public void setName(String name) = name;public String getName() return name;public void setPassword(String password) this.password = password;public String getPassword() return password;UserTest.java:package demo;public class UserText public static void main(String args) User user=new User();user.setName(zs);user.setPassword(zspwd);/user.connect();System.out.println(Is the user valid?);System.out.println(user.isValid();同时注意：创建一个文件夹，取名lib，将数据库驱动程序sqljdbc.jar放在该文件夹内。Hibernate:Course.hbm.xml:hibernate-mapping package=domainCourseSelection.java:package domain;public class CourseSelection private long id;private int score;private Course course;public CourseSelection() / TODO Auto-generated constructor stubpublic CourseSelection(Course course )this.course = course;public void setScore(int score) this.score = score;public int getScore() return score;public Course getCourse() return course;public void setCourse(Course course) this.course = course;public void setId(long id) this.id = id;public long getId() return id;CourseSelection.hbm.xmlInsertCourse.java:public static void main(String args) SessionFactory sf = new Configuration().configure().buildSessionFactory();Session session = sf.openSession();Transaction tr = session.beginTransaction();try Course c = new Course();c.setName(Java EE);c.setCredit(3);c.setHours(48);session.save(c);mit(); catch (Exception e) tr.rollback();e.printStackTrace();session.createSQLQuery(shutdown).executeUpdate();session.close();InsertCourseSelection.java:public static void main(String args) SessionFactory sf = new Configuration().configure().buildSessionFactory();Session session = sf.openSession();Transaction tr = session.beginTransaction();try Course c = new Course();c.setName(Network);c.setCredit(3);c.setHours(64);session.save(c);CourseSelection cs = new CourseSelection();cs.setCourse(c);cs.setScore(88);session.save(cs);mit(); catch (Exception e) tr.rollback();e.printStackTrace();session.createSQLQuery(shutdown).executeUpdate();session.close();InsertStudent.java:public static void main(String args) SessionFactory sf = new Configuration().configure().buildSessionFactory();Session session = sf.openSession();Transaction tr = session.beginTransaction();try Course c = new Course();c.setName(OS);c.setCredit(3);c.setHours(64);session.save(c);CourseSelection cs = new CourseSelection();cs.setCourse(c);cs.setScore(88);session.save(cs);Student s = new Student();s.setStuno(B07053999);s.setName(Yang);s.setDateOfBirth(new Date();s.getCourses().add(cs);session.save(s);mit(); catch (Exception e) tr.rollback();e.printStackTrace();session.createSQLQuery(shutdown).executeUpdate();session.close();ListCourse.javapublic static void main(String args) SessionFactory sf = new Configuration().configure().buildSessionFactory();Session session = sf.openSession();try List courses = session.createQuery(from Course).list();System.out.println(Courses list:);for (Course c : courses)System.out.println(c); catch (Exception e) e.printStackTrace();try List courses = session.createQuery(select c from Course as c where not c.id in (select cs.course f