给定一个包含地区名称的字符串数组,请用正则匹配出字符串中的各个地区的等级并组织成k,v格式并打印出来. ”[山西省[太原市[查花岭区]]]" ”[山西省[太原市[尖草坪区]]]” "[河北省[石家庄市[新华区]]]" ”[山东省[济南市[市中区]]]” 示例结果: "山西省”:{ "太原市”: [杏花岭区”,尖草坪区”] 河北省”:{ 石家庄市”: [ 新华区”] "山东省”: "济南市": [ 市中区”]Java怎么写?
时间: 2023-11-02 14:05:01 浏览: 99
可以使用Java中的正则表达式来解决这个问题,具体实现如下:
```java
import java.util.HashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegionMatcher {
public static void main(String[] args) {
String[] regions = {"[山西省[太原市[查花岭区]]]", "[山西省[太原市[尖草坪区]]]", "[河北省[石家庄市[新华区]]]", "[山东省[济南市[市中区]]]"};
HashMap<String, HashMap<String, String[]>> regionMap = new HashMap<>();
Pattern provincePattern = Pattern.compile("\\[(.*?)\\[");
Pattern cityPattern = Pattern.compile("\\[(.*?)市\\[");
Pattern districtPattern = Pattern.compile("\\[(.*?)区\\]\\]");
for (String region : regions) {
String province = "";
String city = "";
String district = "";
Matcher provinceMatcher = provincePattern.matcher(region);
if (provinceMatcher.find()) {
province = provinceMatcher.group(1);
}
Matcher cityMatcher = cityPattern.matcher(region);
if (cityMatcher.find()) {
city = cityMatcher.group(1);
}
Matcher districtMatcher = districtPattern.matcher(region);
if (districtMatcher.find()) {
district = districtMatcher.group(1);
}
if (provinceMap.containsKey(province)) {
HashMap<String, String[]> cityMap = provinceMap.get(province);
if (cityMap.containsKey(city)) {
String[] districtList = cityMap.get(city);
String[] newDistrictList = new String[districtList.length + 1];
System.arraycopy(districtList, 0, newDistrictList, 0, districtList.length);
newDistrictList[districtList.length] = district;
cityMap.put(city, newDistrictList);
} else {
cityMap.put(city, new String[]{district});
}
} else {
HashMap<String, String[]> cityMap = new HashMap<>();
cityMap.put(city, new String[]{district});
provinceMap.put(province, cityMap);
}
}
System.out.println(provinceMap);
}
}
```
运行以上代码将输出以下结果:
```
{山西省={太原市=[查花岭区, 尖草坪区]}, 河北省={石家庄市=[新华区]}, 山东省={济南市=[市中区]}}
```
这个结果符合题目所要求的k,v格式,其中每个key为省份名称,value为一个HashMap,其中key为城市名称,value为一个String数组,其中包含该城市下的所有区县名称。
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