method.invoke运用

package com.sitechasia.ebiz.publics.model;

import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.lang.StringUtils;

public class StatisticsDO {
	private Integer id;
	private int vpCount1;
	private int vpCount2;
	
	private transient Map<String, Integer> vpCount = new HashMap<String, Integer>();
	
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public int getVpCount1() {
		return vpCount1;
	}
	public void setVpCount1(int vpCount1) {
		this.vpCount1 = vpCount1;
		vpCount.put("vpCount1", vpCount1);
	}
	public int getVpCount2() {
		return vpCount2;
	}
	public void setVpCount2(int vpCount2) {
		this.vpCount2 = vpCount2;
		vpCount.put("vpCount2", vpCount2);
	}
	public int getVpCount(String type) {
		return vpCount.get(type);
	}
	public void setVpCount(String field, int value) {
		try {
			if (StringUtils.isNotBlank(field) && field.startsWith("vpCount")) {
				String methodName = "set" + field.replaceFirst("v", "V");
				Class<Integer> argType = int.class;
				Method method = this.getClass().getMethod(methodName, argType);
				method.invoke(this, (Object) value);
			}

		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}