jsonnnnnn 最近的时间轴更新 jsonnnnnn 最近的时间轴更新 |
jsonnnnnnV2EX 第 455877 号会员，加入于 2019-11-27 15:51:19 +08:00 |
| 求助大佬！多字段排序问题。。 问与答 • jsonnnnnn • 2020-04-08 17:46:53 PM • 最后回复来自 jsonnnnnn | 4 |
jsonnnnnn 最近回复了
2020-04-30 11:43:18 +08:00 回复了 NoKey 创建的主题 › 程序员 › 那天看到一个名词， java6 程序员 |
看了下，果然大部分都是 j8 程序员。。
2020-04-24 15:03:04 +08:00 回复了 PlanZ 创建的主题 › 推广 › GeekHub 上线公测，欢迎来玩。第一波活动送出两个 AirPods 2 ... |
分母+1
2020-04-08 17:46:53 +08:00 回复了 jsonnnnnn 创建的主题 › 问与答 › 求助大佬！多字段排序问题。。 |
@popvlovs 我研究了下，已经搞定了。。谢谢
2020-04-08 17:45:50 +08:00 回复了 jsonnnnnn 创建的主题 › 问与答 › 求助大佬！多字段排序问题。。 |
研究了一下，，自定义了一个 comparator 搞定了。。
public class GoogleReportComparator implements Comparator<CampaignVO> {
private ArrayList<String> fieldList;
public GoogleReportComparator(ArrayList<String> fieldList) {
this.fieldList = fieldList;
}
@Override
public int compare(CampaignVO obj1, CampaignVO obj2) {
int compare = 0;
for (int i = 0; i < fieldList.size(); i++) {
compare = getCompare(obj1, obj2, i);
if (compare != 0) {
return compare;
}
}
return compare;
}
private int getCompare(CampaignVO obj1, CampaignVO obj2, int i) {
String filedValue1 = getCurrnetFiledValue(obj1, fieldList.get(i));
String filedValue2 = getCurrnetFiledValue(obj2, fieldList.get(i));
return filedValue1.compareTo(filedValue2);
}
private String getCurrnetFiledValue(CampaignVO campaignVO, String fieldName) {
StringBuffer sb = new StringBuffer();
sb.append("get");
sb.append(fieldName.substring(0, 1).toUpperCase());
sb.append(fieldName.substring(1));
try {
Method method = campaignVO.getClass().getMethod(sb.toString());
Object obj = method.invoke(campaignVO);
if (null == obj) {
return StringUtils.EMPTY;
} else {
return obj.toString();
}
} catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {
log.error("invoke method error::", e);
}
return StringUtils.EMPTY;
}
}
public class GoogleReportComparator implements Comparator<CampaignVO> {
private ArrayList<String> fieldList;
public GoogleReportComparator(ArrayList<String> fieldList) {
this.fieldList = fieldList;
}
@Override
public int compare(CampaignVO obj1, CampaignVO obj2) {
int compare = 0;
for (int i = 0; i < fieldList.size(); i++) {
compare = getCompare(obj1, obj2, i);
if (compare != 0) {
return compare;
}
}
return compare;
}
private int getCompare(CampaignVO obj1, CampaignVO obj2, int i) {
String filedValue1 = getCurrnetFiledValue(obj1, fieldList.get(i));
String filedValue2 = getCurrnetFiledValue(obj2, fieldList.get(i));
return filedValue1.compareTo(filedValue2);
}
private String getCurrnetFiledValue(CampaignVO campaignVO, String fieldName) {
StringBuffer sb = new StringBuffer();
sb.append("get");
sb.append(fieldName.substring(0, 1).toUpperCase());
sb.append(fieldName.substring(1));
try {
Method method = campaignVO.getClass().getMethod(sb.toString());
Object obj = method.invoke(campaignVO);
if (null == obj) {
return StringUtils.EMPTY;
} else {
return obj.toString();
}
} catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {
log.error("invoke method error::", e);
}
return StringUtils.EMPTY;
}
}
Select Language