import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class ReflectionUtil {
/**
* @param args
*/
public static void main(String[] args) {
Person p=new Person("张三",23);
System.out.println(ReflectionUtil.getFields(p));
System.out.println(ReflectionUtil.getMethods(p));
}
public static List<MethodBean> getMethods(Object obj){
if(obj==null) return null;
List<MethodBean> list = new ArrayList<MethodBean>();
Class<? extends Object> cs=obj.getClass();
Method[] methods = cs.getDeclaredMethods();
for(Method md:methods){
list.add(new MethodBean(md));
}
return list.size()==0?null:list;
}
/**
* 枚举对象的属性和值
* @param obj
* @return
*/
public static Map<String ,Object> getFields(Object obj){
if(obj==null) return null;
HashMap<String, Object > map=new HashMap<String, Object>();
Class<? extends Object> cs=obj.getClass();
Field[] fileds = cs.getDeclaredFields();
for(Field fd:fileds){
//允许访问private成员
fd.setAccessible(true);
try {
map.put(fd.getName(), fd.get(obj));
} catch (Exception e) {
e.printStackTrace();
map.remove(fd.getName());
}
}
return map.size()==0?null:map;
}
}
/**
* 对象--方法名--参数类型--返回值类型
* @author Administrator
*/
class MethodBean{
//对象--方法名--参数类型--返回值类型
private String name;
private String parameterType;
private String returnType;
public MethodBean(String name, String parameterType, String returnType) {
this.name = name;
this.parameterType = parameterType;
this.returnType = returnType;
}
public MethodBean(Method md) {
this.name=md.getName();
this.returnType=md.getReturnType().getName();
this.parameterType=getParameter(md.getParameterTypes());
}
private <T> String getParameter(Class<?>[] cls_arr){
String result="";
for(Class<?> xs:cls_arr){
if(result!="")
result=result+","+xs.getSimpleName();
else
result=result+xs.getName();
}
return result==""?null:result;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getParameterType() {
return parameterType;
}
public void setParameterType(String parameterType) {
this.parameterType = parameterType;
}
public String getReturnType() {
return returnType;
}
public void setReturnType(String returnType) {
this.returnType = returnType;
}
@Override
public String toString() {
return "MethodBean [name=" + name + ", parameterType=" + parameterType
+ ", returnType=" + returnType + "]";
}
}
class Person{
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public Person(String name, int age) {
super();
this.name = name;
this.age = age;
}
@Override
public String toString(){
return "["+this.name+" "+this.age+"]";
}
private String name;
private int age;
}