BeanUtils1.9.1 简单使用

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<String> hobit;
    private Map<String,String> 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("[email protected]");
        people.setPay(3000);
        List<String> h=new ArrayList<String>();
        h.add("football");
        h.add("basketball");
        people.setHobit(h);

        Map<String,String> scroe=new HashMap<String, String>();
        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<String,Object> ph=new HashMap<String, Object>();
        ph.put("id",2);
        ph.put("name","tan");
        ph.put("pay",3000);
        ph.put("email","[email protected]");
        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","[email protected]");
        System.out.println(PropertyUtils.describe(people));
        System.out.println("name:"+PropertyUtils.getProperty(people,"name"));

        //describe
        Map<String, Object> 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:tanweijie
scroe:{Math=80, English=90}
football
basketball
clone 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:[email protected];pay:3000.0;hobit:[football, basketball];scroe:{Math=80, English=90}}
-----------PropertyUtils Test-----------
{id=1, scroe={Math=80, English=90}, [email protected], age=20, name=tanweijie, class=class People, pay=3000.0, hobit=[football, basketball]}
name:tanweijie
map size:8