BeanUtils學習總結
1、BeanUtils介紹

BeanUtils是apache的開發庫；html
爲了使用BeanUtils，須要導入java
(1)common-logging-1.1.1.jarapache
(2)common-beanutils.jaride
2、BeanUtils開發

(1)設置屬性；
(2)註冊轉換器；
(3)自定義轉換器；
(4)批量設置屬性；
注意：JavaBean必須是public的，否則BeanUtils會拋異常；
 
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       package org.xiazdong.beanutils; 
      
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       import java.text.ParseException; 
      
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       import java.text.SimpleDateFormat; 
      
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       import java.util.Date; 
      
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       import java.util.HashMap; 
      
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       import java.util.Map; 
      
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       import org.apache.commons.beanutils.BeanUtils; 
      
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       import org.apache.commons.beanutils.ConversionException; 
      
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       import org.apache.commons.beanutils.ConvertUtils; 
      
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       import org.apache.commons.beanutils.Converter; 
      
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       import org.apache.commons.beanutils.locale.converters.DateLocaleConverter; 
      
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       import org.junit.Test; 
      
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       import org.xiazdong.Person; 
      
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       public class Demo01 { 
      
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           // 設置屬性 
      
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           @Test 
      
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           public void test1() throws Exception { 
      
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               Person p = new Person(); 
      
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               BeanUtils.setProperty(p, "name", "xiazdong"); 
      
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               BeanUtils.setProperty(p, "age", 20); 
      
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               System.out.println(p.getName()); 
      
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               System.out.println(p.getAge()); 
      
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           } 
      
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           // 自定義轉換器 
      
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           @Test 
      
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           public void test2() throws Exception { 
      
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               Person p = new Person(); 
      
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               ConvertUtils.register(new Converter() { 
      
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                   @Override 
      
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                   public Object convert(Class type, Object value) { 
      
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                       if (value == null) { 
      
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                           return null; 
      
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                       } 
      
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                       if (!(value instanceof  String)) { 
      
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                           throw new ConversionException("conversion error"); 
      
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                       } 
      
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                       String str = (String) value; 
      
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                       if (str.trim().equals("")) { 
      
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                           return null; 
      
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                       } 
      
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                       SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); 
      
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                       try { 
      
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                           return sdf.parse(str); 
      
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                       } catch (ParseException e) { 
      
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                           throw new RuntimeException(e); 
      
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                       } 
      
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                   } 
      
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               }, Date.class); 
      
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               BeanUtils.setProperty(p, "birth", "2011-10-10"); 
      
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               System.out.println(p.getBirth().toLocaleString()); 
      
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           } 
      
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           // 使用內置的轉換器 
      
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           @Test 
      
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           public void test3() throws Exception { 
      
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               Person p = new Person(); 
      
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               ConvertUtils.register(new DateLocaleConverter(), Date.class); 
      
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               BeanUtils.setProperty(p, "birth", "2011-10-10"); 
      
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               System.out.println(p.getBirth().toLocaleString()); 
      
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           } 
      
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           // 使用內置的轉換器 
      
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           @Test 
      
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           public void test4() throws Exception { 
      
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               Map map = new HashMap(); 
      
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               map.put("name", "xiazdong"); 
      
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               map.put("age", "20"); 
      
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               map.put("birth", "2010-10-10"); 
      
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               ConvertUtils.register(new DateLocaleConverter(), Date.class); 
      
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               Person p = new Person(); 
      
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               BeanUtils.populate(p, map); 
      
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               System.out.println(p.getAge()); 
      
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               System.out.println(p.getBirth()); 
      
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           } 
      
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       }
轉自：http://blog.csdn.net/xiazdong/article/details/7339687