程式開發學習之路

BeanUtils是一種非常實用的JavaBean，在apache底下的一個組件，我稍微介紹一下它的實用性，等等用程式碼來代表就清楚了，首先需要先把　commons-beanutils-1.8.3.jar　和　commons-logging-1.1.1.jar　導入，再將bean屬性建置好

public class User {



 private String username;



 private String password;



 private String attribute;



 private Long userId;



 private Profile profile;



 //以下get,set

}

public class Profile {



 private String email;



 private Date birthDate;



 private Address[] address;



 private Map<string, string=""> phone;

 

 private HashMap telephone;



 //以下get,set

}

public class Address {



 private String country;



 private String city;



 private String addr;



 private String postcode;



 public Address(String country, String city, String addr, String postcode) {

  this.country = country;

  this.city = city;

  this.addr = addr;

  this.postcode = postcode;

 }



//以下get,set

}

import java.lang.reflect.InvocationTargetException;

import java.util.GregorianCalendar;

import java.util.HashMap;

import java.util.Map;



import org.apache.commons.beanutils.BeanUtils;

import org.apache.commons.beanutils.PropertyUtils;



import BeanUtils.Address;

import BeanUtils.Profile;

import BeanUtils.User;



public class BeanUtilExample {



 //建立假資料

 public User prepareDate() throws IllegalAccessException, InvocationTargetException {

  Profile profile = new Profile();



  profile.setEmail("pp@gmail.com");

  profile.setBirthDate(new GregorianCalendar(2012, 06, 16).getTime());



  Map<string, string=""> phone = new HashMap<string, string="">();

  phone.put("home", "(03)XXXXXXX");

  phone.put("office", "(02)1234-5678");

  phone.put("mobile", "09XX-XXX-XXX");

  profile.setPhone(phone);

  

  Address addr1 = new Address("台灣省", "桃園縣中壢市", "XX路", "100001");

  Address addr2 = new Address("台灣省", "台北市中山區", "XXX路", "100002");

  Address[] address = { addr1, addr2 };

  profile.setAddress(address);



  User user = new User();

  user.setUserId(new Long(123456789));

  user.setUsername("puma");

  user.setPassword("987654321");

  user.setAttribute("男");

  user.setProfile(profile);

  

  return user;

 }



 public static void main(String[] args) {



  BeanUtilExample example = new BeanUtilExample();

  

  try {

   User user = example.prepareDate();

   //取值方式

   System.out.println(BeanUtils.getProperty(user, "userId"));

   System.out.println(PropertyUtils.getProperty(user, "userId"));

   System.out.println(BeanUtils.getProperty(user, "username"));

   System.out.println(BeanUtils.getProperty(user, "password"));

   System.out.println(BeanUtils.getProperty(user, "attribute"));

   System.out.println(BeanUtils.getProperty(user, "profile"));

   System.out.println(BeanUtils.getProperty(user, "profile.email"));

   System.out.println(BeanUtils.getProperty(user, "profile.birthDate"));

   System.out.println(BeanUtils.getProperty(user,  "profile.phone" ));

   System.out.println(BeanUtils.getProperty(user,  "profile.phone(mobile)" ));

   System.out.println(BeanUtils.getProperty(user,  "profile.phone(office)" ));

   System.out.println(BeanUtils.getProperty(user,  "profile.phone(home)" ));

   System.out.println(BeanUtils.getProperty(user,  "profile.address[0].country" ));

   System.out.println(BeanUtils.getProperty(user,  "profile.address[0].city" ));

   System.out.println(BeanUtils.getProperty(user,  "profile.address[0].postcode" ));

         

   System.out.println("--------------------------------------------------------------------");

       

   User user2 =  new  User();

   BeanUtils.copyProperties(user2, user);  //將user這物件轉至user2

   System.out.println(BeanUtils.getProperty(user2,  "userId" ));  //輸出user類的userId的值

   System.out.println(PropertyUtils.getProperty(user2,  "userId" ));

   System.out.println(BeanUtils.getProperty(user2,  "username" ));

   System.out.println(BeanUtils.getProperty(user2,  "password" ));

   System.out.println(BeanUtils.getProperty(user2,  "profile" ));

   System.out.println(BeanUtils.getProperty(user2,  "profile.email" ));

   System.out.println(BeanUtils.getProperty(user2,  "profile.birthDate" ));

   System.out.println(BeanUtils.getProperty(user2,  "profile.phone" ));

   System.out.println(BeanUtils.getProperty(user2,  "profile.phone(mobile)" ));

   System.out.println(BeanUtils.getProperty(user2,  "profile.phone(office)" ));

   System.out.println(BeanUtils.getProperty(user2,  "profile.phone(home)" ));

   System.out.println(BeanUtils.getProperty(user2,  "profile.address[0].country" ));

   System.out.println(BeanUtils.getProperty(user2,  "profile.address[0].city" ));

   System.out.println(BeanUtils.getProperty(user2,  "profile.address[0].postcode" ));

         

   System.out.println("--------------------------------------------------------------------");

         

   Profile profile = new Profile();

   HashMap map = new HashMap();



   map.put( "1", "13880808080" );

   map.put( "2", "13550505050" );

   BeanUtils.setProperty( profile, "telephone", map );

   System.out.println(BeanUtils.getProperty( profile, "telephone(1)" ));

         

  } catch (IllegalAccessException e) {

   // TODO Auto-generated catch block

   e.printStackTrace();

  } catch (InvocationTargetException e) {

   // TODO Auto-generated catch block

   e.printStackTrace();

  } catch (NoSuchMethodException e) {

   // TODO Auto-generated catch block

   e.printStackTrace();

  }

 }

}

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