BeanUtils的简单使用

一个简单的People类：

import java.util.List;import java.util.Map;public class People {    private int id;    private String name;    private int age;    private String email;    private double pay;    private List
    
      hobit;    private Map
     
       scroe;    @Override    public String toString(){        return "People:{"+"id:"+id+";name:"+name+";age:"+age+";email:"+email+";pay:"+pay+";hobit:"+hobit+";scroe:"+scroe+"}";    }//get set..
     
    

BeanUtils

import org.apache.commons.beanutils.BeanUtils;import org.apache.commons.beanutils.PropertyUtils;import java.lang.reflect.InvocationTargetException;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;/** * @author Mr_Tank_ * */public class Main {    public static void main(String[] args) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException, InstantiationException {        //System.out.println("Hello World!");        People people=new People();        people.setId(1);        people.setAge(20);        people.setName("tanweijie");        //people.setEmail("474481263@qq.com");        people.setPay(3000);        List
    
      h=new ArrayList
     
      ();        h.add("football");        h.add("basketball");        people.setHobit(h);        Map
      
        scroe=new HashMap
       
        ();        scroe.put("Math","80");        scroe.put("English","90");        people.setScroe(scroe);        System.out.println("-----------BeanUtils Test-----------");        //BeanUtils Test        System.out.println(BeanUtils.describe(people));        System.out.println("name:"+BeanUtils.getProperty(people,"name"));        System.out.println("scroe:"+BeanUtils.getProperty(people,"scroe"));        String[] hl=BeanUtils.getArrayProperty(people, "hobit");        for (String s:hl){            System.out.println(s);        }        //clone Bean        People cp= (People) BeanUtils.cloneBean(people);        System.out.println("clone Bean:"+cp.toString());        //Map        HashMap
        
          ph=new HashMap
         
          ();        ph.put("id",2);        ph.put("name","tan");        ph.put("pay",3000);        ph.put("email","474481263@qq.com");        ph.put("age",22);        ph.put("hobit",h);        People people1=new People();        //Map to obj        BeanUtils.populate(people1,ph);        System.out.println(people1.toString());        //PropertyUtils Test        System.out.println("-----------PropertyUtils Test-----------");        PropertyUtils.setProperty(people,"email","474481263@qq.com");        System.out.println(PropertyUtils.describe(people));        System.out.println("name:"+PropertyUtils.getProperty(people,"name"));        //describe        Map
          
            pd=PropertyUtils.describe(people);        System.out.println("map size:"+pd.size());    }}
          
         
        
       
      
     
    

结果：

-----------BeanUtils Test-----------{id=1, scroe={Math=80, English=90}, email=null, age=20, name=tanweijie, class=class People, pay=3000.0, hobit=football}name:tanweijiescroe:{Math=80, English=90}footballbasketballclone Bean:People:{id:1;name:tanweijie;age:20;email:null;pay:3000.0;hobit:[football, basketball];scroe:{Math=80, English=90}}People:{id:2;name:tan;age:22;email:474481263@qq.com;pay:3000.0;hobit:[football, basketball];scroe:{Math=80, English=90}}-----------PropertyUtils Test-----------{id=1, scroe={Math=80, English=90}, email=474481263@qq.com, age=20, name=tanweijie, class=class People, pay=3000.0, hobit=[football, basketball]}name:tanweijiemap size:8