反射技术将POJO对象(属性和属性值)转成Map

// 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