[JAVA_Apache]有幫程式設計師設計BeanUtils工具套件

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 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 phone = new HashMap();
  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();
  }
 }
}

結果

123456789

123456789

puma

987654321

男

BeanUtils.Profile@66388993

pp@gmail.com

Mon Jul 16 00:00:00 CST 2012

{office=(02)1234-5678, home=(03)XXXXXXX, mobile=09XX-XXX-XXX}

09XX-XXX-XXX

(02)1234-5678

(03)XXXXXXX

台灣省

桃園縣中壢市

100001

--------------------------------------------------------------------

123456789

123456789

puma

987654321

BeanUtils.Profile@66388993

pp@gmail.com

Mon Jul 16 00:00:00 CST 2012

{office=(02)1234-5678, home=(03)XXXXXXX, mobile=09XX-XXX-XXX}

09XX-XXX-XXX

(02)1234-5678

(03)XXXXXXX

台灣省

桃園縣中壢市

100001

--------------------------------------------------------------------

15136125313

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