java实现对map的字典序排序操作示例

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import org.apache.commons.codec.digest.DigestUtils;
import com.opensymphony.xwork2.ActionSupport;
public class Test extends ActionSupport {
//测试页面
public String test(){
return SUCCESS;
}
public static void main(String [] args){
String jsapi_ticket="kgt8ON7yVITDhtdwci0qef4Fd1u2d2iWwTE-nt2tSR7Me3FmWAhtxJa3QQCiMdLper4cUrqpDxkDJ6ljLgc7PA";
int timestamp=1460637652;
String nOnceStr="C1WNnEpCwq4wa158";
String url="http://qq.test.com/test/index.html";
//字典序排序
HashMap map=new HashMap();
map.put("jsapi_ticket", jsapi_ticket);
map.put("timestamp", timestamp+"");
map.put("nonceStr", nonceStr);
map.put("url", url);
Collection keyset= map.keySet();
List list=new ArrayList(keyset);
Collections.sort(list);
//这种打印出的字符串顺序和微信官网提供的字典序顺序是一致的
for(int i=0;i