利用java 中的反射将Pojo 对象转换为HashMap
<div class="postbody">// POJOpackage 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.getName().indexOf("get")==0) {
//System.out.println("方法名："+m.getName());
// System.out.println("值："+ m.invoke(obj, new Object));
hashMap.put(m.getName(), m.invoke(obj, new Object));
}
}
} 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
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