利用java 中的反射将Pojo 对象转换为HashMap

// POJO
package com.test;
public class Person {
 
    private Integer id;
    private String lastName;
    private String firstName;

    public String getFirstName()
    {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }
}

//测试类

package com.test;

import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

public class Test {

 /**
  * @将POJO对象转成Map
  */

 public static Map testReflect(Object obj) {
  Map hashMap = new HashMap();
  try {
   Class c = obj.getClass();
   Method m[] = c.getDeclaredMethods();
   for (int i = 0; i < m.length; i++) {
    if (m[i].getName().indexOf("get")==0) {
      //System.out.println("方法名："+m[i].getName());
     // System.out.println("值："+ m[i].invoke(obj, new Object[0]));
     hashMap.put(m[i].getName(), m[i].invoke(obj, new Object[0]));
    }
   }
  } catch (Throwable e) {
   System.err.println(e);
  }
  return hashMap;
 }

 public static void main(String[] args) {

  Person p = new Person();
  p.setFirstName("张");
  p.setId(119);
  p.setLastName("三");
  Map personMap = Test.testReflect(p);
  Iterator it = personMap.entrySet().iterator();
  while (it.hasNext()) {
   Map.Entry map = (Map.Entry) it.next();
   System.out.println("方法名：" + map.getKey() + "  ,值: "+ map.getValue());
  }

 }

}

//测试结果
方法名：getLastName  ,值: 三
方法名：getId  ,值: 119
方法名：getFirstName  ,值: 张