ConvertUtils 的简单使用

package com.beanUtil;

public class TestConvertUtil extends org.apache.commons.beanutils.ConvertUtils {   
    
    //将object转化成int型   
    public static int intConvert(Object object){   
        String str = object==null?null:object.toString();   
        Object obj = org.apache.commons.beanutils.ConvertUtils.convert(str, Integer.class);   
        Integer i= (Integer)obj;   
        return i;   
    }   
    //将任意的Object转换成string   
    public static String stringConvert(Object object){   
        Object obj = org.apache.commons.beanutils.ConvertUtils.convert(object);   
        String string = (String) obj;   
        return string;   
    }   
    public static boolean booleanConvert(Object object){   
        String str = object == null?null:object.toString();   
        Object obj = org.apache.commons.beanutils.ConvertUtils.convert(str, Boolean.class);   
        boolean b =(Boolean)obj;   
        return b;   
    }   
       
    public static void main(String[] arg) {   
        System.out.println(intConvert("123"));   
        System.out.println(stringConvert(456.2));   
        System.out.println(booleanConvert("true"));   
    }   
} 

======================================================================================
使用PropertyUtils 将javaBean转化成Map
需要导入commons-beanutils.jar   和 commons-logging.jar

下面是两个javaBean

Author.java

package com.beanUtil;

public class Author {

private String name;

public Author() {
   super();
}

public String getName() {
   return name;
}

public void setName(String name) {
   this.name = name;
}

}

Book.java

package com.beanUtil;

public class Book {

private String name;
private Author author;

public String getName() {
   return name;
}

public void setName(String name) {
   this.name = name;
}

public Author getAuthor() {
   return author;
}

public void setAuthor(Author author) {
   this.author = author;
}

}

Bean2Map.java

package com.beanUtil;

import java.util.Map;
import java.lang.reflect.InvocationTargetException;
import org.apache.commons.beanutils.PropertyUtils;


public class Bean2Map {

@SuppressWarnings("unchecked")
public static void main(String[] args) {

   Author author = new Author();   
   author.setName("wenliang.li");   
             
   Book book = new Book();   
   book.setName("pro spring");   
   book.setAuthor(author);   
         
   // 取得book中的所有可读属性,返回到map中   
   Map<String,Book> bookMap = null;
   Map<String,Author> authorMap = null;
   try {
    bookMap = PropertyUtils.describe(book);
    // Book类中包含一个Author类型的属性   
    // 取bookMap中的author bean,并将其所有可读属性返回到authorMap中   
    authorMap = PropertyUtils.describe(bookMap.get("author"));   
         
   } 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();
   }   
  
   //输出
   //Book Name: pro spring
   //Author Name: wenliang.li 
   System.out.println("Book Name: " + bookMap.get("name"));   
   System.out.println("Author Name: " + authorMap.get("name")); 
}
}

==============================================================================================================
LazyDynaBean动态加载属性类，配合LazyDynaClass一起使用

//用法1  
         

                   DynaProperty[] props=new DynaProperty[]{   
        new DynaProperty("name",String.class),   
        new DynaProperty("age",Integer.class),   
        new DynaProperty("birth",Date.class)   
};   
LazyDynaClass dynaClass=new LazyDynaClass("user",LazyDynaBean.class,props);   
try {   
    LazyDynaBean dynaBean = (LazyDynaBean) dynaClass.newInstance();   
       
    SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");   
    dynaBean.set("name", "章子怡");   
    dynaBean.set("age", 16);   
    dynaBean.set("birth", sdf.parse("1986-05-01"));   
    StringBuilder sb=new StringBuilder();   
    sb.append("name:").append(dynaBean.get("name"))   
    .append(",age:").append(dynaBean.get("age"))   
    .append(",birth:").append(sdf.format(dynaBean.get("birth")));   
    System.out.println(sb.toString());   
       
    dynaBean.set("email", "[e-mail]");   
    System.out.println(dynaBean.get("email"));   
} catch (ParseException e) {   
    // TODO Auto-generated catch block   
    e.printStackTrace();   
} catch (IllegalAccessException e) {   
    // TODO Auto-generated catch block   
    e.printStackTrace();   
} catch (InstantiationException e) {   
    // TODO Auto-generated catch block   
    e.printStackTrace();   
}   
  
//用法2   
DynaBean bean=new LazyDynaBean();   
bean.set("name", "孙晓磊");   
System.out.println(bean.get("name"));   
MutableDynaClass dc=(MutableDynaClass)bean.getDynaClass(); //获取可以动态添加属性的DynaClass类   
  
System.out.println("----开始测试数组属性----");   
dc.add("indexProp", int[].class); //添加整型数组属性   
bean.set("indexProp", 0, 1); //给数组属性添加值   
bean.set("indexProp", 1, 2);   
int[] indexProp=(int[]) bean.get("indexProp");   
System.out.println(indexProp[1]);   
  
System.out.println("----开始测试LIST属性----");   
bean.set("indexProp2", 0, "str1"); //直接添加属性，此时属性的类型是LIST或数组，此处是LIST   
bean.set("indexProp2", 1, "str2");   
List list=(List) bean.get("indexProp2");   
System.out.println(list.get(0));   
  
System.out.println("----开始测试MAP属性----");   
bean.set("mapProp","key1","value1"); //直接添加键值对，默认属性类型是MAP   
Map map=(Map)bean.get("mapProp");   
System.out.println(map.get("key1"));   
  
dc.add("mapProp2", HashMap.class); //或者先设置属性类型，再添加   
bean.set("mapProp2","mapProp2-key1","mapProp2-value1");   
Map map2=(Map)bean.get("mapProp2");   
System.out.println(map2.get("mapProp2-key1"));