遍历Map集合与List集合

Map集合的定义

HashMap<Integer,String[]> columnValueList = new HashMap<Integer,String[]>();
HashMap<String,String> primaryMap = new HashMap<String,String>();
primaryMap.put(fieldName, fieldOrder.toString());
	String[] columnValue = new String[3];
	columnValue[0]=fieldName;
	columnValue[2]=fieldDataType;
	columnValueList.put(fieldOrder-1,columnValue);


String [] sqls = new String[sheet.getLastRowNum()];
condictionSql = "INSERT INTO "+templateTable+"("+paramkey.toString()+")  VALUES( "+paramval.toString()+")";
}
sqls[i-1] = condictionSql;

for循环遍历Map集合

for (Iterator<Entry<String, String>> pm = primaryMap.entrySet().iterator(); pm.hasNext(); ) {
Entry<String, String> entry = (Entry<String, String>) pm.next();
//如果是无线新增操作
if(templateActionField == null){
paramPrimarykey.append(",").append(entry.getKey());
String  pkVal = CommonUtils.getUUID();
paramSubval.append(",").append("'"+pkVal+"'");
primaryMapVal.add(pkVal);
}else {  
paramPrimarykey.append(",").append(entry.getKey());
String  pkVal = CommonUtils.getUUID();
paramSubval.append(",").append("'"+pkVal+"'");
primaryMapVal.add(pkVal);
busPrimaryKey = templateActionField;
							}
if(paramPrimarykey.indexOf(",")==0){
paramkey = paramkey.append(paramPrimarykey.substring(1));
							}
if(paramSubval.indexOf(",")==0){
paramval = paramval.append(paramSubval.substring(1));
							}
						}


for (Iterator<Entry<Integer, String[]>> it = columnValueList.entrySet().iterator(); it.hasNext(); ) {
Entry<Integer, String[]> entry = (Entry<Integer, String[]>) it.next();
String[] entryValue = entry.getValue();
paramkey.append(",").append(entryValue[0]);
paramval.append(",").append(entryValue[1]);
}

foreach遍历map集合

		Map<String, List<FastEntryVO>> fastEntryMap = getFastEntryDtoMap(fastEntryList);
		List<FastEntryDto> fastEntryDtoList = new ArrayList<FastEntryDto>(1);
		FastEntryDto fastEntryDto = null;
		for (Map.Entry<String, List<FastEntryVO>> entry : fastEntryMap.entrySet()) 
		{
			for (FastEntryVO fastEntry : fastEntryList) 
			{
				if (fastEntry.getFastEntryId().equals(entry.getKey())) 
				{
					fastEntryDto = new FastEntryDto();
					BeanUtils.copyProperties(fastEntry, fastEntryDto);
					fastEntryDto.setFastEntryList(entry.getValue());
					fastEntryDtoList.add(fastEntryDto);
					break;
				}
			}
		}
		return fastEntryDtoList;
	}


	private Map<String, List<FastEntryVO>> getFastEntryDtoMap(List<FastEntryVO> fastEntryList) {
		Map<String, List<FastEntryVO>> entryMap = new HashMap<String, List<FastEntryVO>>(1);
		List<FastEntryVO> secondEntryList = null;
		FastEntryVO entry = null;
		for (FastEntryVO fastEntry : fastEntryList) {
			if (fastEntry.getParentId().equals("-1")) {
				continue;
			}
			entry = new FastEntryVO();
			BeanUtils.copyProperties(fastEntry, entry);// 复制属性
			if (entryMap.containsKey(fastEntry.getParentId())) {
				secondEntryList = entryMap.get(fastEntry.getParentId());
				secondEntryList.add(entry);
			} else {
				secondEntryList = new ArrayList<FastEntryVO>(1);
				secondEntryList.add(entry);
				entryMap.put(fastEntry.getParentId(), secondEntryList);
			}
		}
		return entryMap;
	}

list初始化

List<String> items = new ArrayList<String>();
items.add(questionITA);
items.add(questionITB);
items.add(questionITC);
items.add(questionITD);

遍历list集合

for(int m=0;m<=items.size()-1;m++) {
String itemCon = items.get(m);
}

list集合与map集合的组装

	public List<CheckAdvice> removePicExtra(List<CheckAdvice> picList,List<CheckAdvice> list) {
	List<CheckAdvice> newList= new ArrayList<CheckAdvice>();
        HashMap<String, String> hashMap = new HashMap<String, String>();
        for (CheckAdvice checkAdvice : picList) {
            if (checkAdvice == null) {
                continue;
            }
            String  adviceId = checkAdvice.getAdviceId();
            if (adviceId != null) {
                String value = hashMap.get(adviceId);
                if (StringUtil.isEmpty(value)) { //如果value是空的  说明取到的这个adviceId是第一次取到
                    hashMap.put(adviceId, adviceId);
                } else {
                    continue;
                }
            }   
        }
        
        for (CheckAdvice checkAdvice : list) {
            if (checkAdvice == null) {
                continue;
            }
            String  adviceId = checkAdvice.getAdviceId();
            if (adviceId != null) {
                String value = hashMap.get(adviceId);
                if (StringUtil.isEmpty(value)) { //如果value是空的  说明取到的这个adviceId是第一次取到
                    hashMap.put(adviceId, adviceId);
                    newList.add(checkAdvice); 
                } else {
                    continue;
                }
            }   
        }
        hashMap.clear();
        return newList;
	}