Hibernate逍遥游记-第1章-JDBC访问数据库

1.

 package mypack;

 import java.awt.*;
 import java.awt.event.*;
 import javax.swing.*;
 import javax.swing.table.*;
 import java.util.*;

 public class MonkeyGui implements ActionListener{
   private BusinessService businessService=new BusinessService();

   //界面的主要窗体组件
   protected JFrame frame;
   protected Container contentPane;

   //主面板上的组件
   protected JPanel custPan=new JPanel();
   protected JLabel nameLb=new JLabel("猴子姓名");
   protected JLabel genderLb=new JLabel("性别");
   protected JLabel ageLb=new JLabel("年龄");
   protected JLabel logLb=new JLabel("");

   protected JTextField nameTf=new JTextField(25);
   protected JTextField genderTf=new JTextField(25);
   protected JTextField ageTf=new JTextField(25);
   protected JButton addBt=new JButton("保存");

   /** 构造方法 */
   public MonkeyGui(){
     buildDisplay();
   }

   /** 创建图形界面 */
   private void buildDisplay(){
    frame=new JFrame("花果山信息管理系统");
    buildCustPanel();

    //向主窗体中加入custPan面板
    contentPane=frame.getContentPane();
    contentPane.setLayout(new BorderLayout());
    contentPane.add(custPan,BorderLayout.CENTER);

    frame.pack();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);

   }

   /**　创建custPan面板 */
   private void buildCustPanel(){
    custPan.setLayout(new GridLayout(4,2,5,5));
    custPan.add(nameLb);
    custPan.add(nameTf);
    custPan.add(genderLb);
    custPan.add(genderTf);
    custPan.add(ageLb);
    custPan.add(ageTf);

    custPan.add(addBt);
    custPan.add(logLb);

    addBt.addActionListener(this);

   }

   public void actionPerformed(ActionEvent event){
     try{
       Monkey monkey=new Monkey();
       monkey.setName(nameTf.getText().trim());
       monkey.setAge(Integer.parseInt(ageTf.getText().trim()));
       monkey.setGender(genderTf.getText().trim().charAt(0));
       businessService.saveMonkey(monkey);
       logLb.setText("猴子信息已经保存成功。");
     }catch(Exception e){
       logLb.setText("猴子信息保存失败。");
       e.printStackTrace();
     }

   }

   public static void main(String args[]){
     new MonkeyGui();
   } 

 }

2.

 package mypack;
 import java.io.*;
 import java.util.*;
 import java.sql.*;

 public class BusinessService{
   private String dbUrl ="jdbc:mysql://localhost:3306/SAMPLEDB";
   private String dbUser="root";
   private String dbPwd="1234";

   static{
     try{
       Class.forName("com.mysql.jdbc.Driver");
       DriverManager.registerDriver(new com.mysql.jdbc.Driver());
     }catch(Exception e){throw new RuntimeException(e);}
   }

   /** 持久化一个Monkey对象 */
   public void saveMonkey(Monkey monkey){
     Connection con=null;
     try {
       //建立数据库连接
       con = java.sql.DriverManager.getConnection(dbUrl,dbUser,dbPwd);
       //创建一个SQL声明
       Statement stmt = con.createStatement();
       //向MONKEYS表插入记录
       stmt.executeUpdate("insert into MONKEYS(NAME,AGE,GENDER) values( "
          +"'"+monkey.getName()+"',"
          +monkey.getAge()+","
          +"'"+monkey.getGender()+"')");
       stmt.close();
     }catch(Exception e) {
       throw new  RuntimeException(e);
     } finally {
       try{
         if(con!=null)con.close();
       }catch(Exception e){e.printStackTrace();}
     }
   }

 }

3.

 package mypack;

 public class Monkey{
   private Long id;
   private String name;
   private int age;
   private char gender;

   public Monkey(){}

   public Long getId(){
     return id;
   }

   private void setId(Long id){
     this.id = id;
   }

   public String getName(){
     return name;
   }

   public void setName(String name){
     this.name=name;
   }

   public int getAge(){
     return age;
   }

   public void setAge(int age){
     this.age =age ;
   }

   public char getGender(){
     return gender;
   }

   public void setGender(char gender){
     this.gender =gender ;
   }
 }

4.

 drop database if exists SAMPLEDB;
 create database SAMPLEDB DEFAULT CHARACTER SET utf8;
 use SAMPLEDB;

 create table MONKEYS (
   ID bigint not null auto_increment primary key,
   NAME varchar(30) not null,
   AGE int,
   GENDER char(1)
 );

5.build.xml

 <?xml version="1.0"?>
 <project name="Learning Hibernate" default="prepare" basedir=".">

   <!-- Set up properties containing important project directories -->
   <property name="source.root" value="src"/>
   <property name="class.root" value="classes"/>
   <property name="lib.dir" value="lib"/>

   <!-- Set up the class path for compilation and execution -->
   <path id="project.class.path">
       <!-- Include our own classes, of course -->
       <pathelement location="${class.root}" />
       <!-- Include jars in the project library directory -->
       <fileset dir="${lib.dir}">
         <include name="*.jar"/>
       </fileset>
   </path>

   <!-- Create our runtime subdirectories and copy resources into them -->
   <target name="prepare" description="Sets up build structures">
     <delete dir="${class.root}"/>
     <mkdir dir="${class.root}"/>

     <!-- Copy our property files and O/R mappings for use at runtime -->
     <copy todir="${class.root}" >
       <fileset dir="${source.root}" >
         <include name="**/*.properties"/>
         <include name="**/*.hbm.xml"/>
         <include name="**/*.xml"/>
       </fileset>
     </copy>
   </target>

   <!-- Compile the java source of the project -->
   <target name="compile" depends="prepare"
           description="Compiles all Java classes">
     <javac srcdir="${source.root}"
            destdir="${class.root}"
            debug="on"
            optimize="off"
            deprecation="on">
       <classpath refid="project.class.path"/>
     </javac>
   </target>

   <target name="rungui" description="Run a Hibernate sample"
     depends="compile" >
     <java classname="mypack.MonkeyGui" fork="true">
        <classpath refid="project.class.path"/>
     </java>
   </target>

 </project>

6.在命令行中输入 ant rungui,会编译代码后运行MonkeyGui类的main()方法

7.

package mypack;
import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.table.*;import java.util.*;
public class MonkeyGui implements ActionListener{  private BusinessService businessService=new BusinessService();
  //界面的主要窗体组件  protected JFrame frame;  protected Container contentPane;
  //主面板上的组件  protected JPanel custPan=new JPanel();  protected JLabel nameLb=new JLabel("猴子姓名");  protected JLabel genderLb=new JLabel("性别");  protected JLabel ageLb=new JLabel("年龄");  protected JLabel logLb=new JLabel("");
  protected JTextField nameTf=new JTextField(25);  protected JTextField genderTf=new JTextField(25);  protected JTextField ageTf=new JTextField(25);  protected JButton addBt=new JButton("保存");
    /** 构造方法 */  public MonkeyGui(){    buildDisplay();  }    /** 创建图形界面 */  private void buildDisplay(){   frame=new JFrame("花果山信息管理系统");   buildCustPanel();         //向主窗体中加入custPan面板   contentPane=frame.getContentPane();   contentPane.setLayout(new BorderLayout());   contentPane.add(custPan,BorderLayout.CENTER);    frame.pack();   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   frame.setVisible(true);
  }     /**　创建custPan面板 */  private void buildCustPanel(){   custPan.setLayout(new GridLayout(4,2,5,5));   custPan.add(nameLb);   custPan.add(nameTf);   custPan.add(genderLb);   custPan.add(genderTf);   custPan.add(ageLb);   custPan.add(ageTf);
   custPan.add(addBt);   custPan.add(logLb);    addBt.addActionListener(this);
  }    public void actionPerformed(ActionEvent event){    try{      Monkey monkey=new Monkey();      monkey.setName(nameTf.getText().trim());      monkey.setAge(Integer.parseInt(ageTf.getText().trim()));      monkey.setGender(genderTf.getText().trim().charAt(0));      businessService.saveMonkey(monkey);        logLb.setText("猴子信息已经保存成功。");    }catch(Exception e){      logLb.setText("猴子信息保存失败。");      e.printStackTrace();    }      }   public static void main(String args[]){    new MonkeyGui();  }   }