[零基础学JAVA]Java SE实战开发-37.MIS信息管理系统实战开发[JDBC](3)

PersonDAOProxyJDBC.java

package org.michael.demo.proxy;    
import java.util.Set;    
import org.michael.demo.dao.PersonDAO;    
import org.michael.demo.dao.impl.PersonDAOImplJDBC;    
import org.michael.demo.vo.Person;    
public class PersonDAOProxyJDBC implements PersonDAO {    
         private PersonDAO dao = null;    
         public PersonDAOProxyJDBC(String type) {    
                 this.dao = new PersonDAOImplJDBC(type);    
        }    
         public boolean doCreate(Person person) throws Exception {    
                 // TODO Auto-generated method stub    
                 return this.dao.doCreate(person);    
        }    
         public boolean doDelete(String id) throws Exception {    
                 // TODO Auto-generated method stub    
                 return this.dao.doDelete(id);    
        }    
         public boolean doUpdate(Person person) throws Exception {    
                 // TODO Auto-generated method stub    
                 return this.dao.doUpdate(person);    
        }    
         public Set<Person> findAll() throws Exception {    
                 // TODO Auto-generated method stub    
                 return this.dao.findAll();    
        }    
         public Person findById(String id) throws Exception {    
                 // TODO Auto-generated method stub    
                 return this.dao.findById(id);    
        }    
         public Set<Person> findByLike(String keyWord) throws Exception {    
                 // TODO Auto-generated method stub    
                 return this.dao.findByLike(keyWord);    
        }    
}

 

InputData.java

package org.michael.demo.util;    
//输入数据的操作类    
import java.io.BufferedReader;    
import java.io.IOException;    
import java.io.InputStreamReader;    
public class InputData {    
         private BufferedReader buf = null;    
         public InputData() {    
                buf = new BufferedReader( new InputStreamReader(System.in));    
        }    
         public int getInt() {    
                 int temp = 0;    
                 // 如果输入的不是数字，至少应该有一个提示，告诉用户输入错了    
                 // 可以使用正则验证    
                String str = null;    
                 boolean flag = true;    
                 while (flag) {    
                         // 输入数据    
                        str = this.getString();    
                         if (!(str.matches( "\\d+"))) {    
                                 // 如果不是一个数字，则必须重新输入    
                                System.out.print( "输入的内容，必须是整数，请重新输入：");    
                        } else {    
                                 // 是一个正确的数字，则可以进行转换    
                                temp = Integer.parseInt(str);    
                                 // 表示退出循环    
                                flag = false;    
                        }    
                }    
                 return temp;    
        }    
         public String getString() {    
                String str = null;    
                 try {    
                        str = buf.readLine();    
                } catch (IOException e) {    
                        e.printStackTrace();    
                }    
                 return str;    
        }    
         public float getFloat() {    
                 float f = 0.0f;    
                String str = null;    
                 boolean flag = true;    
                 while (flag) {    
                         // 输入数据    
                        str = this.getString();    
                         if (!(str.matches( "\\d+.?\\d{1,2}"))) {    
                                 // 如果不是一个数字，则必须重新输入    
                                System.out.print( "输入的内容，必须是小数（小数点后只到两位），请重新输入：");    
                        } else {    
                                 // 是一个正确的数字，则可以进行转换    
                                f = Float.parseFloat(str);    
                                 // 表示退出循环    
                                flag = false;    
                        }    
                }    
                 return f;    
        }    
}

 

TimeStamp.java

package org.michael.demo.util;    
import java.util.Calendar;    
import java.util.GregorianCalendar;    
import java.util.Random;    
// 取得时间戳的类    
public class TimeStamp {    
         private Calendar calendar = null;    
         // 此标记有外部决定    
         private String flag = null;    
         public TimeStamp() {    
                 this.calendar = new GregorianCalendar();    
        }    
         public TimeStamp(String flag) {    
                 this() ;    
                 this.flag = flag;    
        }    
         public String getTimeStamp() {    
                StringBuffer buf = new StringBuffer();    
                 if ( this.flag != null) {    
                        buf.append( this.flag);    
                }    
                buf.append( this.addZero(calendar.get(Calendar.YEAR), 4));    
                buf.append( this.addZero(calendar.get(Calendar.MONTH) + 1, 2));    
                buf.append( this.addZero(calendar.get(Calendar.DAY_OF_MONTH), 2));    
                buf.append( this.addZero(calendar.get(Calendar.HOUR_OF_DAY), 2));    
                buf.append( this.addZero(calendar.get(Calendar.MINUTE), 2));    
                buf.append( this.addZero(calendar.get(Calendar.SECOND), 2));    
                buf.append( this.addZero(calendar.get(Calendar.MILLISECOND), 3));    
                 return buf.toString();    
        }    
         public String getTimeStampRandom() {    
                StringBuffer buf = new StringBuffer();    
                Random r = new Random();    
                buf.append( this.getTimeStamp());    
                buf.append(r.nextInt(10));    
                buf.append(r.nextInt(10));    
                buf.append(r.nextInt(10));    
                 return buf.toString();    
        }    
         // 可以单独设置一个加“0”的操作    
         private String addZero( int temp, int len) {    
                String str = temp + "";    
                 while (str.length() < len) {    
                        str = "0" + str;    
                }    
                 return str;    
        }    
}

 

Person.java

package org.michael.demo.vo;

import java.io.Serializable;

public abstract class Person implements Comparable<Object>,Serializable {
   // 定义各公共属性
   private String id ;
   private String name ;
   private int age ;
   public Person(String id,String name, int age){
     this.setId(id) ;
     this.setName(name) ;
     this.setAge(age) ;
  }
   public String getId() {
     return id;
  }
   public void setId(String 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;
  }
}

 

Student.java

package org.michael.demo.vo;    
public class Student extends Person {    
         private static final long serialVersionUID = 1L;    
         private float score;    
         public Student(String id, String name, int age, float score) {    
                 super(id, name, age);    
                 this.setScore(score);    
        }    
         public int compareTo(Object arg0) {    
                Student s = (Student) arg0;    
                 if ( this.score < s.score) {    
                         return 1;    
                } else if ( this.score > s.score) {    
                         return -1;    
                } else {    
                         if ( super.getAge() < s.getAge()) {    
                                 return -1;    
                        } else if ( super.getAge() > s.getAge()) {    
                                 return 1;    
                        } else {    
                                 return 0;    
                        }    
                }    
        }    
         public String toString() {    
                 return this.getId() + "\t" + this.getName() + "\t" + this.getAge() + "\t" + this.score;    
        }    
         public float getScore() {    
                 return score;    
        }    
         public void setScore( float score) {    
                 this.score = score;    
        }    
}

 

Worker.java

package org.michael.demo.vo;    
public class Worker extends Person {    
         private static final long serialVersionUID = 1L;    
         private float salary;    
         public Worker(String id, String name, int age, float salary) {    
                 super(id, name, age);    
                 this.setSalary(salary);    
        }    
         public int compareTo(Object arg0) {    
                Worker w = (Worker) arg0;    
                 if ( this.salary < w.salary) {    
                         return 1;    
                } else if ( this.salary > w.salary) {    
                         return -1;    
                } else {    
                         if ( super.getAge() < w.getAge()) {    
                                 return -1;    
                        } else if ( super.getAge() > w.getAge()) {    
                                 return 1;    
                        } else {    
                                 return 0;    
                        }    
                }    
        }    
         public String toString() {    
                 return this.getId() + "\t" + this.getName() + "\t" + this.getAge()    
                                + "\t" + this.salary;    
        }    
         public float getSalary() {    
                 return salary;    
        }    
         public void setSalary( float salary) {    
                 this.salary = salary;    
        }    
}

 

测试：

  ####################Michael分割线###########################

本身显示的效果并不复杂，但是在此程序中重点是体现了一种程序的设计的分层思路，如果可以做的再好，最好把学生和工人的操作分开，分别完成。
建立一个专门的：StudentDAO操作
建立一个专门的：WorkerDAO操作
这样的话通过工厂分别取得两个接口的实例，就可以避免传递参数了。
所有的类要分别按不同的包存放，而且在写代码的时候必须使用考虑如果万一修改了该怎么办？

####################Michael分割线###########################

源代码下载

#################Michael分割线####################