包含，contains，集合去重

package com.sszt.zwfw.statisticalanalysis.service;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class test {
	 public static void main(String[] args) {
		//是否包含改字符串
		String rucan = "1" ;
		String a = "a,aa,bb,c,1084";
		String b = ","+a+",";
		b.contains(","+rucan+",");
		System.out.println(b.contains(rucan));
		//去重
		List<Map<String, Object>> list2 = new ArrayList<Map<String, Object>>();
		Map<String, Object> map = new HashMap<String, Object>();
		Map<String, Object> map2 = new HashMap<String, Object>();
		Map<String, Object> map3 = new HashMap<String, Object>();
		Map<String, Object> map4 = new HashMap<String, Object>();
		Map<String, Object> map5 = new HashMap<String, Object>();
		Map<String, Object> map6 = new HashMap<String, Object>();
		Map<String, Object> map7 = new HashMap<String, Object>();
		Map<String, Object> map8 = new HashMap<String, Object>();
		map.put("好1", 1);
		map2.put("好1", 2);
		map3.put("好1", 1);
		map4.put("好1", 4);
		map5.put("好1", 1);
		map6.put("好1", 1);
		map7.put("好1", 7);
		map8.put("好1", 1);
		list2.add(map);
		list2.add(map2);
		list2.add(map3);
		list2.add(map4);
		list2.add(map5);
		list2.add(map6);
		list2.add(map7);
		list2.add(map8);
		for  ( int  i  =   0 ; i  <  list2.size()  -   1 ; i ++ )  {       
		      for  ( int  j  =  list2.size()  -   1 ; j  >  i; j -- )  {   
		    	  System.out.println(list2.get(i).get("好1")+"----"+list2.get(j).get("好1"));
		    	  if  (list2.get(j).get("好1").equals(list2.get(i).get("好1")))  {       
		        	   list2.remove(j);       
		            }        
		        }        
		 } 
		System.out.println(list2);
	 }
}