需要取得類

public class TaskProvidePropsList {

 private int provide_id;
         private int props_sign;
         public int getProvide_id() {
  return provide_id;
 }
 public void setProvide_id(int provide_id) {
  this.provide_id = provide_id;
 }
       public int getProps_sign() {
  return props_sign;
 }
 public void setProps_sign(int props_sign) {
  this.props_sign = props_sign;
 }
}

反射獲取的方法

import java.lang.reflect.*;

public class Test{
  public static void main(String args[]) throws Exception{
    Class c=Class.forName("TaskProvidePropsList");
    Object obj=c.newInstance();
    //set
    Method msetid=c.getMethod("setProvide_id",Integer.TYPE);
    msetid.invoke(obj,new Integer(100));
    Method msetsign=c.getMethod("setProps_sign",Integer.TYPE);
    msetsign.invoke(obj,new Integer(100));
    //get
    Method mgetsign=c.getMethod("getProps_sign");
    Integer sign=(Integer)mgetsign.invoke(obj);
    Method mgetid=c.getMethod("getProvide_id");
    Integer id=(Integer)mgetid.invoke(obj);
    //列印
    System.out.println("Props_sign:"+sign.intValue());
    System.out.println("Provide_id:"+id.intValue());
  }
}

遍歷所有方法的程式碼:
Class c=Class.forName("TaskProvidePropsList");
Object obj=c.newInstance();
Method all[]=c.getMethods();
boolean isset[]=new boolean[all.length];
int i=0;
//按順序列印
for(i=0;i<all.length;i++){
  String name=all[i].getName();
  isset[i]=name.startsWith("set");
  if(isset[i]) all[i].invoke(obj,new Integer(100));
}
for(i=0;i<all.length;i++){
  if(!isset[i]){
    Integer val=all[i].invoke(obj);
    String name=(all[i].getName()).substring(3);
    System.out.println(name+":"+val.intValue());
  }
}