java实现集合对象排序(单个字段)

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package com.collection;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class SingleSort<E> {
	/**
	 * 
	 * @param list 要排序的集合
	 * @param method 要排序的实体的属性所对应的get方法
	 * @param sort desc 为正序  
	 */
	public void Sort(List<E> list, final String method, final String sort) {
		// 用内部类实现排序
		Collections.sort(list, new Comparator<E>() {

			public int compare(E a, E b) {
				int ret = 0;
				try {
					// 获取m1的方法名
					Method m1 = ((E)a).getClass().getMethod(method, new Class[]{});
					// 获取m2的方法名
					Method m2 = ((E)b).getClass().getMethod(method, new Class[]{});
					
					if (sort != null && "desc".equals(sort)) {

						ret = m2.invoke(((E)b), new Object[]{}).toString().compareTo(m1.invoke(((E)a),new Object[]{}).toString());

					} else {
						// 正序排序
						ret = m1.invoke(((E)a), new Object[]{}).toString().compareTo(m2.invoke(((E)b), new Object[]{}).toString());
					}
				} catch (Exception ne) {
					ne.printStackTrace();
				}
				return ret;
			}
		});
	}
	public static void main(String[] args) {
    	List<JavaBeanS> list = new ArrayList<JavaBeanS>();
    	JavaBeanS bean = new JavaBeanS(2,"张三","b");
    	list.add(bean);
    	bean = new JavaBeanS(1,"李四","d");
    	list.add(bean);
    	bean = new JavaBeanS(3,"王二","c");
    	list.add(bean);
    	bean = new JavaBeanS(4,"钱七","a");
    	list.add(bean);
    	
    	SingleSort<JavaBeanS> sorter = new SingleSort<JavaBeanS>();
    	sorter.Sort(list, "getAddress", "desc");
    	
        for (JavaBeanS obj : list) {
			System.out.println(obj.getId()+":"+obj.getName()+":"+obj.getAddress());
		}
	}
}
class JavaBeanS{
	private String name;
	private String address;
	private int id;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public JavaBeanS(int id,String name, String address) {
		super();
		this.name = name;
		this.address = address;
		this.id = id;
	}
}