package org.xiazdong.beanutils;    import java.text.ParseException;  import java.text.SimpleDateFormat;  import java.util.Date;  import java.util.HashMap;  import java.util.Map;    import org.apache.commons.beanutils.BeanUtils;  import org.apache.commons.beanutils.ConversionException;  import org.apache.commons.beanutils.ConvertUtils;  import org.apache.commons.beanutils.Converter;  import org.apache.commons.beanutils.locale.converters.DateLocaleConverter;  import org.junit.Test;  import org.xiazdong.Person;    public class Demo01 {     // 设置属性   @Test   public void test1() throws Exception {    Person p = new Person();    BeanUtils.setProperty(p, "name", "xiazdong");    BeanUtils.setProperty(p, "age", 20);    System.out.println(p.getName());    System.out.println(p.getAge());   }     // 自定义转换器   @Test   public void test2() throws Exception {    Person p = new Person();    ConvertUtils.register(new Converter() {       @Override     public Object convert(Class type, Object value) {      if (value == null) {       return null;      }      if (!(value instanceof String)) {       throw new ConversionException("conversion error");      }      String str = (String) value;      if (str.trim().equals("")) {       return null;      }      SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");      try {       return sdf.parse(str);      } catch (ParseException e) {       throw new RuntimeException(e);      }       }      }, Date.class);    BeanUtils.setProperty(p, "birth", "2011-10-10");    System.out.println(p.getBirth().toLocaleString());   }     // 使用内置的转换器   @Test   public void test3() throws Exception {    Person p = new Person();    ConvertUtils.register(new DateLocaleConverter(), Date.class);    BeanUtils.setProperty(p, "birth", "2011-10-10");    System.out.println(p.getBirth().toLocaleString());   }     // 使用内置的转换器   @Test   public void test4() throws Exception {    Map map = new HashMap();    map.put("name", "xiazdong");    map.put("age", "20");    map.put("birth", "2010-10-10");    ConvertUtils.register(new DateLocaleConverter(), Date.class);    Person p = new Person();    BeanUtils.populate(p, map);    System.out.println(p.getAge());    System.out.println(p.getBirth());   }  }